LGL GROUP INC — Interim / Quarterly Report 2026

May 11, 2026

Table of Contents

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q

(Mark One)

☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2026

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from __ to ____

Commission File No. 001-00106

The LGL Group, Inc.

(Exact Name of Registrant as Specified in Its Charter)

Delaware	38-1799862
(State or Other Jurisdiction of Incorporation or Organization)	(I.R.S. Employer Identification No.)
2525 Shader Rd. , Orlando , Florida	32804
(Address of principal executive offices)	(Zip Code)

( 407 ) 298-2000

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, par value $0.01	LGL	NYSE American

Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer	☐	Accelerated filer	☐
Non-accelerated filer	☒	Smaller reporting company	☒
Emerging growth company	☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No ☒

As of April 30, 2026, the registrant had 6,540,435 shares of common stock, $0.01 par value per share, outstanding.

Table of Contents

The LGL Group, Inc.

Form 10-Q for the Period Ended March 31, 2026

Table of Contents

PART I.	FINANCIAL INFORMATION		Page
Item 1.	Financial Statements (Unaudited)
	Condensed Consolidated Balance Sheets		2
	Condensed Consolidated Statements of Operations		3
	Condensed Consolidated Statements of Stockholders’ Equity		4
	Condensed Consolidated Statements of Cash Flows		5
	Notes to the Condensed Consolidated Financial Statements
	1.	Basis of Presentation	6
	2.	Summary of Significant Accounting Policies	6
	3.	Segment Information	7
	4.	Investments	9
	5.	Fair Value Measurements	11
	6.	Variable Interest Entities	12
	7.	Related Party Transactions	13
	8.	Income Taxes	14
	9.	Stock-Based Compensation	14
	10.	Stockholders' Equity	15
	11.	Earnings Per Share	16
	12.	Contingencies	16
	13.	Other Financial Statement Information	16
	14.	Domestic and Foreign Revenues	17
	15.	Subsequent Events	17
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations		18
Item 3.	Quantitative and Qualitative Disclosures About Market Risk		22
Item 4.	Controls and Procedures		22
PART II.	OTHER INFORMATION
Item 1.	Legal Proceedings		23
Item 1A.	Risk Factors		23
Item 5.	Other Information		23
Item 6.	Exhibits		24
	Signatures		25

Table of Contents

Cautionary Statement Concerning Forward-Looking Statements

Certain statements contained in this Quarterly Report on Form 10-Q of The LGL Group, Inc. ("LGL Group" or the "Company") and the Company's other communications and statements, other than historical facts, may be considered forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). The Company intends for all such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 27A of the Securities Act and Section 21E of the Exchange Act, as applicable by law. Such statements include, in particular, statements about the Company's beliefs, plans, objectives, goals, expectations, estimates, projections and intentions. These statements are subject to significant risks and uncertainties and are subject to change based on various factors, many of which are beyond the Company's control. The words "may," "could," "should," "would," "believe," "anticipate," "estimate," "expect," "intend," "plan," "target," "goal" and similar expressions are intended to identify forward-looking statements. All forward-looking statements, by their nature, are subject to risks and uncertainties. Therefore, such statements are not intended to be a guarantee of the Company's performance in future periods. The Company's actual future results may differ materially from those set forth in the Company's forward-looking statements. For information concerning these factors and related matters, see "Risk Factors" in Part I, Item 1A of our Annual Report on Form 10-K for the fiscal year ended December 31, 2025, filed with the Securities and Exchange Commission ("SEC") on March 30, 2026, this Quarterly Report on Form 10-Q and our other filings with the SEC. However, other factors besides those referenced could adversely affect the Company's results, and you should not consider any such list of factors to be a complete set of all potential risks or uncertainties. Any forward-looking statements made by the Company herein speak as of the date of this Quarterly Report on Form 10-Q. The Company does not undertake to update any forward-looking statement, except as required by law. As a result, you should not place undue reliance on these forward-looking statements.

1

Table of Contents

PART I

FINANCIAL INFORMATION

ITEM 1. Financial Statements

The LGL Group, Inc.

Condensed Consolidated Balance Sheets

(Unaudited)

(in thousands, except share data)	March 31, 2026
Assets:
Current assets:
Cash and cash equivalents	$ 46,646	$	41,514
Marketable securities	50		36
Accounts receivable, net of reserves of $ 52 and $ 52 , respectively	284		572
Inventories, net	278		297
Prepaid expenses and other current assets	258		255
Warrant proceeds receivable	—		3,650
Total current assets	47,516		46,324
Right-of-use lease assets	231		247
Intangible assets, net	9		15
Deferred income tax assets	367		190
Total assets	$ 48,123	$	46,776
Liabilities:
Current liabilities:
Accounts payable	690		366
Accrued compensation and commissions	264		250
Income taxes payable	—		45
Other accrued expenses and liabilities	257		254
Total current liabilities	1,211		915
Other liabilities	283		296
Total liabilities	1,494		1,211
Contingencies (Note 12)
Stockholders' equity:
Common stock ($ 0.01 par value; 30,000,000 shares authorized; 6,673,482 shares issued and 6,540,435 shares outstanding as of March 31, 2026; 6,307,997 shares issued and 6,174,950 shares outstanding as of December 31, 2025)	64		61
Treasury stock, at cost ( 133,047 shares as of March 31, 2026 and December 31, 2025)	( 946	)	( 946	)
Additional paid-in capital	51,979		50,313
Accumulated deficit	( 6,562	)	( 5,940	)
Total LGL Group stockholders' equity	44,535		43,488
Non-controlling interests	2,094		2,077
Total stockholders' equity	46,629		45,565
Total liabilities and stockholders' equity	$ 48,123	$	46,776

See accompanying Notes to the Condensed Consolidated Financial Statements.

2

Table of Contents

The LGL Group, Inc.

Condensed Consolidated Statements of Operations

(Unaudited)

(in thousands, except share data)	Three Months Ended March 31, — 2026		2025
Revenues:
Net sales	$ 682		$ 498
Net investment income	389		417
Net gains	14		3
Total revenues	1,085		918
Expenses:
Manufacturing cost of sales	334		237
Engineering, selling and administrative	1,536		640
Total expenses	1,870		877
(Loss) income before income taxes	( 785	)	41
Income tax (benefit) expense	( 180	)	28
Net (loss) income	( 605	)	13
Less: Net income attributable to non-controlling interests	17		19
Net loss attributable to LGL Group common stockholders	$ ( 622	)	$ ( 6	)
Loss per common share attributable to LGL Group common stockholders:
Basic	$ ( 0.10	)	$ ( 0.00	)
Diluted	$ ( 0.10	)	$ ( 0.00	)
Weighted average shares outstanding:
Basic	6,410,166		5,352,937
Diluted	6,410,166		5,352,937

See accompanying Notes to the Condensed Consolidated Financial Statements.

3

Table of Contents

The LGL Group, Inc.

Condensed Consolidated Statements of Stockholders ’ Equity

(Unaudited)

(in thousands, except share data) — Balance at December 31, 2025	Common Stock — $ 61	Treasury Stock — $ ( 946	)	Additional Paid-In Capital — $ 50,313	$	( 5,940	)	Total LGL Stockholders' Equity — $ 43,488	$	2,077	Total Equity — $ 45,565
Net (loss) income attributable to LGL Group or non-controlling interests	—	—		—		( 622	)	( 622	)	17	( 605	)
Stock-based compensation	1	—		687		—		688		—	688
Shares withheld for employee taxes	—	—		( 9	)	—		( 9	)	—	( 9	)
Exercise of warrants, net of costs	2	—		988		—		990		—	990
Balance at March 31, 2026	$ 64	$ ( 946	)	$ 51,979	$	( 6,562	)	$ 44,535	$	2,094	$ 46,629

(in thousands, except share data)	Common Stock	Treasury Stock		Additional Paid-In Capital	Accumulated Deficit		Total LGL Stockholders' Equity			Total Equity
Balance at December 31, 2024	$ 53	$ ( 580	)	$ 46,385	$ ( 6,628	)	$ 39,230	$	2,010	$ 41,240
Net (loss) income attributable to LGL Group or non-controlling interests	—	—		—	( 6	)	( 6	)	19	13
Stock-based compensation	—	—		9	—		9		—	9
Shares withheld for employee taxes	—	—		—	—		—		—	—
Exercise of warrants, net of costs	—	—		—	—		—		—	—
Balance at March 31, 2025	$ 53	$ ( 580	)	$ 46,394	$ ( 6,634	)	$ 39,233	$	2,029	$ 41,262

See accompanying Notes to the Condensed Consolidated Financial Statements.

4

Table of Contents

The LGL Group, Inc.

Condensed Consolidated Statements of Cash Flows

( Unaudited )

(in thousands)	Three Months Ended March 31, — 2026		2025
Cash flows from operating activities:
Net (loss) income	$ ( 605	)	$ 13
Adjustments to reconcile net (loss) income to net cash provided by (used in) operating activities:
Noncash revenues, expenses, gains and losses included in income:
Amortization of finite-lived intangible assets	6		6
Stock-based compensation	688		9
Unrealized gain on marketable securities	( 14	)	( 3	)
Deferred income taxes	( 177	)	22
Changes in operating assets and liabilities:
Decrease in accounts receivable, net	288		187
Decrease in inventories, net	19		26
Increase in prepaid expenses and other assets	( 3	)	( 48	)
Increase in accounts payable, accrued compensation, income taxes and commissions and other	299		128
Total adjustments	1,106		327
Net cash provided by operating activities	501		340
Cash flows from financing activities:
Proceeds from exercise of warrants, net of costs	4,640		—
Payment for taxes related to net share settlement of equity awards	( 9	)	—
Net cash provided by financing activities	4,631		—
Increase in cash and cash equivalents	5,132		340
Cash and cash equivalents at beginning of period	41,514		41,585
Cash and cash equivalents at end of period	$ 46,646		$ 41,925
Supplemental disclosure:
Income taxes paid	$ 52		$ —

See accompanying Notes to the Condensed Consolidated Financial Statements.

5

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

1. Basis of Presentation

The LGL Group, Inc. is a holding company engaged in services, merchant investment, and manufacturing business activities. The Company was incorporated in 1928 under the laws of the State of Indiana and reincorporated under the laws of the State of Delaware in 2007. Unless the context indicates otherwise, the terms "LGL," "LGL Group," "we," "us," "our," or the "Company" mean The LGL Group, Inc. and its consolidated subsidiaries.

The Company’s manufacturing business is operated through its subsidiary Precise Time and Frequency, LLC ("PTF"), which has operations in Wakefield, Massachusetts. PTF is engaged in the design of high-performance Frequency and Time Reference Standards that form the basis for timing and synchronization in various applications.

These unaudited Condensed Consolidated Financial Statements do not include all disclosures that are normally included in annual financial statements prepared in accordance with accounting principles generally accepted in the United States ("U.S. GAAP") and should be read in conjunction with the audited Consolidated Financial Statements and the related notes included in our Annual Report on Form 10 -K for the year ended December 31, 2025 (the " 2025 Annual Report") filed with the Securities and Exchange Commission (the "SEC") on March 30, 2026 . The consolidated financial information as of December 31, 2025 included herein has been derived from the audited Consolidated Financial Statements in the 2025 Annual Report.

The Condensed Consolidated Financial Statements include the accounts of The LGL Group, Inc., its majority-owned subsidiaries, and variable interest entities ("VIEs") of which we are the primary beneficiary.

In the opinion of management, these Condensed Consolidated Financial Statements contain all adjustments (consisting of normal recurring adjustments, including eliminations of material intercompany accounts and transactions) considered necessary for a fair statement of the results presented herein. Operating results for the three months ended March 31, 2026 are not necessarily indicative of the results that may be expected for the full year ending December 31, 2026 .

2. Summary of Significant Accounting Policies

During the three months ended March 31, 2026 , there were no material changes to our significant accounting policies included in the 2025 Annual Report. For additional information, refer to Note 2 to the audited Consolidated Financial Statements in the 2025 Annual Report.

Use of Estimates

The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from those estimates.

Impairment of Long-Lived Assets

Long-lived assets, including intangible assets subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of the asset may not be recoverable. Long-lived assets are grouped with other assets to the lowest level to which identifiable cash flows are largely independent of the cash flows of other groups of assets and liabilities. Management assesses the recoverability of the carrying cost of the assets based on a review of projected undiscounted cash flows. If an asset is held for sale, management reviews its estimated fair value less cost to sell. Fair value is determined using pertinent market information, including appraisals or broker's estimates, and/or projected discounted cash flows. In the event an impairment loss is identified, it is recognized based on the amount by which the carrying value exceeds the estimated fair value of the long-lived asset.

We performed an assessment to determine if there were any indicators of impairment as a result of the operating conditions resulting as of the periods ended March 31, 2026 and December 31, 2025 . We concluded that, while there were events and circumstances in the macro-environment that did impact us, we did not experience any entity-specific indicators of asset impairment and no triggering events occurred.

Accounting Standards Adopted

Income Taxes

In December 2023, the FASB issued ASU 2023 - 09, "Income Taxes (Topic 740 ) - Improvements to Income Tax Disclosures" ("ASU 2023 - 09" ). The standard requires disaggregated information about a company's effective tax rate reconciliation as well as information on income taxes paid. The provisions of the standard are effective for public companies for fiscal years beginning after December 15, 2024, with early adoption permitted. This standard applies prospectively; however, retrospective application is permitted. The Company adopted ASU 2023 - 09 in December 2025. Refer to Note 8 - Income Taxes to the Company's Consolidated Financial Statements included in its Annual Report on Form 10 -K for the year ended December 31, 2025 for further information.

6

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

Future Application of Accounting Standards

Disaggregation of Income Statement Expenses

In November 2024, the FASB issued ASU 2024 - 03, " Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220 - 40 ): Disaggregation of Income Statement Expenses " ("ASU 2024 - 03" ). The standard requires additional disclosure of certain costs and expenses within the notes to the financial statements. The provisions of the standard are effective for annual reporting periods beginning after December 15, 2026, and interim reporting periods beginning after December 15, 2027, with early adoption permitted. This accounting standards update may be applied either prospectively or retrospectively. We are assessing the impact of this standard.

3. Segment Information

Chief Operating Decision Maker

The Company's chief operating decision maker ("CODM") is the Chief Executive Officer.

Reportable Segments

The Company reports its results from operations consistent with the manner in which the CODM reviews the business to assess performance and allocation resources. As such, the Company reports its results in two business segments: Electronic Instruments and Merchant Investment. A brief description of each segment is below:

The Electronic Instruments segment includes all products manufactured and sold by PTF.

The Merchant Investment segment includes all activity produced by Lynch Capital International, LLC ("Lynch Capital").

The Company includes in Corporate the following corporate and business activities:

• corporate level assets and financial obligations such as cash and cash equivalents invested in highly liquid U.S. Treasury money market funds and other marketable securities;

• other items not allocated to or directly related to the Company's operating segments, including items such as deferred tax balances; and

• intercompany eliminations.

Measure of Segment Profit or Loss and Segment Assets

The accounting policies used in both the Electronic Instruments and Merchant Investment segments are the same as those described in Note 2 – Summary of Significant Accounting Policies.

The CODM assess the performance of and decide how to allocate resources to each reporting segment based on Segment profit (loss), which is total revenues less Manufacturing cost of sales and Engineering, selling, and administrative. The CODM uses Segment profit (loss) to evaluate the overall profitability of the Electronic Instruments, Merchant Investment, and Corporate segments. Additionally, the CODM uses Segment profit (loss) to allocate resources in the annual budgeting and forecasting process. The CODM considers budget-to-actual variances when making decisions about allocating capital to each segment.

The measure of segment assets is reported on the Condensed Consolidated Balance Sheets as consolidated Total assets. The CODM uses Total assets of each segment to allocate overhead expenses incurred by the Corporate segment.

7

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

The following tables present LGL Group's operations by segment:

	Three Months Ended March 31, 2026 — Electronic Instruments	Merchant Investment	Corporate		Consolidated
Revenues:
Net sales	$ 682	$ —	$ —		$ 682
Net investment income	—	223	166		389
Net gains	—	—	14		14
Total revenues	682	223	180		1,085
Less:
Manufacturing cost of sales	334	—	—		334
Engineering	90	—	—		90
Commissions	25	—	—		25
Sales and marketing	63	—	—		63
Accounting	—	—	70		70
Compensation	58	—	813		871
Corporate allocations (a)	16	125	( 141	)	—
Other segment items (b)	79	—	338		417
Engineering, selling and administrative	331	125	1,080		1,536
Total expenses	665	125	1,080		1,870
Segment profit (loss)	$ 17	$ 98	$ ( 900	)	$ ( 785	)
Reconciliation of Segment profit (loss) to Income (loss) before income taxes
Adjustments and reconciling items					—
Loss before income taxes					$ ( 785	)

	Three Months Ended March 31, 2025 — Electronic Instruments	Merchant Investment	Corporate		Consolidated
Revenues:
Net sales	$ 498	$ —	$ —		$ 498
Net investment income	—	247	170		417
Net gains	—	—	3		3
Total revenues	498	247	173		918
Less:
Manufacturing cost of sales	237	—	—		237
Engineering	57	—	—		57
Commissions	19	—	—		19
Sales and marketing	57	—	—		57
Accounting	—	—	75		75
Compensation	56	—	192		248
Corporate allocations (a)	11	93	( 104	)	—
Other segment items (b)	42	1	141		184
Engineering, selling and administrative	242	94	304		640
Total expenses	479	94	304		877
Segment profit (loss)	$ 19	$ 153	$ ( 131	)	$ 41
Reconciliation of Segment profit (loss) to Income (loss) before income taxes
Adjustments and reconciling items					—
Income before income taxes					$ 41

(a) The Electronic Instruments and Merchant Investment segments are allocated overhead expenses from the Corporate segment based on each segment's asset as a percentage of Total assets.

(b)
Electronic Instruments - rent, amortization, professional service fees, and certain other overhead expenses.
Merchant Investment - legal expense and certain other overhead expenses.
Corporate - legal expense, insurance expense, filing fees, fees paid to M-tron Industries, Inc. under Amended and Restated Transitional Administrative and Management Services Agreement, expense reimbursements paid to / received from M-tron Industries, Inc., and certain other overhead expenses.

8

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

Other Segment Disclosures

The following tables presents other segment information by segment for the three months ended March 31, 2026 and 2025 :

	Three Months Ended March 31, 2026 — Electronic Instruments	Merchant Investment	Corporate	Total	Adjustments and Reconciling Items	Consolidated
Interest revenue (a)	$ —	$ 223	$ 166	$ 389	$ —	$ 389
Amortization (b)	6	—	—	6	—	6
Other significant non-cash items
Stock-based compensation (c)	—	—	688	688	—	688
Capital expenditures	—	—	—	—	—	—

	Three Months Ended March 31, 2025 — Electronic Instruments	Merchant Investment	Corporate	Total	Adjustments and Reconciling Items	Consolidated
Interest revenue (a)	$ —	$ 247	$ 170	$ 417	$ —	$ 417
Amortization (b)	6	—	—	6	—	6
Other significant non-cash items
Stock-based compensation (c)	—	—	9	9	—	9
Capital expenditures	—	—	—	—	—	—

(a) Interest revenue is included in Net investment income on the Condensed Consolidated Statements of Operations.

(b) Amortization is included within the other segment expense captions. such as Manufacturing cost of sales, Engineering, or Other segment items.

(c) Stock-based compensation is included within the Compensation expense caption.

The following tables present other segment information by segment as of March 31, 2026 and December 31, 2025 :

	March 31, 2026 — Electronic Instruments	Merchant Investment	Corporate	Total	Adjustments and Reconciling Items	Consolidated
Total assets	$ 1,303	$ 25,991	$ 20,829	$ 48,123	$ —	$ 48,123

	December 31, 2025 — Electronic Instruments	Merchant Investment	Corporate	Total	Adjustments and Reconciling Items	Consolidated
Total assets	$ 1,237	$ 25,768	$ 19,771	$ 46,776	$ —	$ 46,776

4. Investments

Marketable Securities

Details of marketable securities held as of March 31, 2026 and December 31, 2025 are as follows:

	March 31, 2026
			Cumulative
			Unrealized
	Fair Value	Basis	Gain
Equity securities	$ 50	$ 34	$ 16
Total	$ 50	$ 34	$ 16

	December 31, 2025
			Cumulative
			Unrealized
	Fair Value	Basis	Gain
Equity securities	$ 36	$ 34	$ 2
Total	$ 36	$ 34	$ 2

9

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

Net Investment Income

Net investment income represents income primarily from the following sources:

• Income earned from investments in money market funds (recorded in Cash and cash equivalents)

• Dividends received from Marketable securities

• Income from unconsolidated or equity method investments

The following table presents the components of Net investment income:

	Three Months Ended March 31, — 2026	2025
Interest on cash and cash equivalents	$ 389	$ 417
Net investment income	$ 389	$ 417

Net Gains (Losses)

Net gains and losses are determined by specific identification. The net realized gains and losses are generated primarily from the following sources:

• Realized gains and losses from investments in Marketable securities

• Changes in the fair value of investments in Marketable securities

• Change in the fair value of derivatives

The following table presents the components of Net gains (losses):

	Three Months Ended March 31, — 2026	2025
Marketable securities	$ 14	$ 3
Net gains	$ 14	$ 3

10

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

5. Fair Value Measurements

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value guidance identifies three primary valuation techniques: the market approach, the income approach and the cost approach. The market approach uses prices and other relevant information generated by market transactions involving identical or comparable assets or liabilities. The income approach uses valuation techniques to convert future amounts, such as cash flows or earnings, to a single present amount. The measurement is based on the value indicated by current market expectations about those future amounts. The cost approach is based on the amount that currently would be required to replace the service capacity of an asset.

Fair Value Hierarchy

The fair value hierarchy prioritizes the inputs to valuation techniques used to measure fair value into three broad levels. The fair value hierarchy gives the highest priority to observable inputs such as quoted prices in active markets for identical assets or liabilities (Level 1 ) and the lowest priority to unobservable inputs (Level 3 ). The maximization of observable inputs and the minimization of the use of unobservable inputs are required.

Classification within the fair value hierarchy is based upon the objectivity of the inputs that are significant to the valuation of an asset or liability as of the measurement date. The three levels within the fair value hierarchy are characterized as follows:

Level 1** - Quoted prices (unadjusted) in active markets for identical assets or liabilities that the Company has the ability to access at the measurement date.

Level 2 - Inputs other than quoted prices included within Level 1 that are observable for the asset or liability, either directly or indirectly. Level 2 inputs include: quoted prices for similar assets or liabilities in active markets; quoted prices for identical or similar assets or liabilities in markets that are not active; inputs other than quoted prices that are observable for the asset or liability; and inputs that are derived principally from or corroborated by observable market data by correlation or other means.

Level 3 - Unobservable inputs for the asset or liability for which there is little, if any, market activity for the asset or liability at the measurement date. Unobservable inputs reflect the Company's own assumptions about what market participants would use to price the asset or liability. These inputs may include internally developed pricing models, discounted cash flow methodologies as well as instruments for which the fair value determination requires significant management judgment.

The following is a description of the valuation methodologies used for instruments carried at fair value. These methodologies are applied to asset and liabilities across the levels discussed above, and the observability of the inputs used determines the appropriate level in the fair value hierarchy for the respective asset or liability.

Valuation Methodologies of Financial Instruments Measured at Fair Value

Cash and cash equivalents - Money market instruments are measured at cost, which approximates fair values because of the relatively short time to maturity.

Equity securities - Whenever available, we obtained quoted prices in active markets for identical assets as of the balance sheet date to measure equity securities. Market price data is generally obtained from exchange or dealer markets.

Assets and Liabilities Measured at Fair Value on a Recurring Basis

The following table presents information about assets measured at fair value on a recurring basis and indicates the level of the fair value measurement based on the observability of inputs used:

	March 31, 2026 — Level 1	Level 2	Level 3	Total
Cash and cash equivalents (a)	$ 45,958	$ —	$ —	$ 45,958
Marketable securities:
Equity securities	50	—	—	50
Total marketable securities	50	—	—	50
Total	$ 46,008	$ —	$ —	$ 46,008

	December 31, 2025 — Level 1	Level 2	Level 3	Total
Cash and cash equivalents (a)	$ 41,317	$ —	$ —	$ 41,317
Marketable securities:
Equity securities	36	—	—	36
Total marketable securities	36	—	—	36
Total	$ 41,353	$ —	$ —	$ 41,353

(a) As of March 31, 2026 and December 31, 2025 , included investments in money market mutual funds managed or advised by GAMCO Investors, Inc.

There were no liabilities subject to fair value on a recurring basis as of March 31, 2026 and December 31, 2025 .

11

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

Fair Value Measurements on a Non-Recurring Basis

The Company has other assets that may be subject to measurement at fair value on a non-recurring basis including goodwill and intangible assets and other long-lived assets. The Company reviews goodwill annually and the carrying value of long-lived assets whenever events and circumstances indicate that the carrying amounts of the assets may not be recoverable. If it is determined that the assets are impaired, the carrying value would be reduced to an estimated recoverable value.

As of March 31, 2026 and December 31, 2025 , the Company did not write down any assets to fair value.

Fair Value Information about Financial Instruments Not* Measured at Fair Value*

As of March 31, 2026 and December 31, 2025 , the Company did not have any assets or liabilities classified as financial instruments that were not measured at fair value.

6. Variable Interest Entities

The Company holds variable interests in certain entities in the form of equity investments. The Company consolidates an entity under the variable interest entity ("VIE") guidance when it is determined the Company is the primary beneficiary.

The Company has no right to the benefits from, nor does it bear the risk associated with, VIEs beyond the Company's direct equity investments in these entities. If the Company were to liquidate, the assets held by VIEs would not be available to the general creditors of the Company as a result of the liquidation.

During June 2023, the Company was appointed as sole managing member of LGL Systems Nevada Management Partners, LLC ("LGL Nevada") and invested approximately $ 4 into LGL Nevada, representing the Company's 1.0 % general partnership interest. Concurrently, Lynch Capital, a wholly owned subsidiary of the Company, invested $ 1,000 into LGL Systems Acquisition Holding Company, LLC ("LGL Systems"), representing 34.8 % of the memberships in LGL Systems, which is controlled by LGL Nevada. As a result, the Company determined it was the primary beneficiary of LGL Systems and was therefore required to consolidate LGL Systems.

Consolidated VIEs

The Company's only consolidated VIE is LGL Systems.

The following table summarizes the assets and liabilities of LGL Systems included in the Condensed Consolidated Balance Sheets:

	March 31, 2026	December 31, 2025
Assets:
Current assets:
Cash and cash equivalents	$ 3,196	$ 3,169
Accounts receivable	17	17
Total current assets	3,213	3,186
Total assets	$ 3,213	$ 3,186
Total liabilities	$ —	$ —

As of March 31, 2026 and December 31, 2025 , the non-controlling interests in LGL Systems was $ 2,094 and $ 2,077 , respectively.

Unconsolidated VIEs

The Company's only unconsolidated VIE is LGL Nevada.

We calculate our maximum exposure to loss to be (i) the amount invested in the debt or equity of the VIE and (ii) other commitments and guarantees to the VIE.

	March 31, 2026	December 31, 2025
Total assets	$ 618	$ 615
Maximum exposure to loss:
On-balance sheet (a)	4	4
Off-balance sheet (b)	—	—
Total	$ 4	$ 4

(a) As of March 31, 2026 and December 31, 2025 , our investment in LGL Nevada was recorded in Other assets in the Condensed Consolidated Balance Sheets.

(b) This amount represents our remaining unfunded commitment to LGL Nevada.

LGL Systems Nevada Management Partners LLC

LGL Nevada was formed in October 2019 for the purpose of performing key management and controls decisions of LGL Systems. The remaining 99.0 % of ownership interests are held by four individuals, two of which are members of Company management. In the event LGL Nevada resigns as manager of LGL Systems, it has the sole right to appoint a new manager.

12

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

7. Related Party Transactions

In the normal course of business, the Company enters into various transactions with affiliated companies. Parties are considered to be related if one party has the ability to control or exercise significant influence over the other party in making financial or operating decisions.

The following table summarizes income and expenses from transactions with related parties for the three months ended March 31, 2026 and 2025 :

	Three Months Ended March 31,
	2026		2025
	Income	Expense	Income	Expense
GAMCO Investors, Inc.	$ 346	$ —	$ 348	$ —
M-tron Industries, Inc.	—	40	—	( 14	)
Total	$ 346	$ 40	$ 348	$ ( 14	)

The following table summarizes assets and liabilities with related parties as of March 31, 2026 and December 31, 2025 :

	March 31, 2026 — Assets	Liabilities	December 31, 2025 — Assets	Liabilities
GAMCO Investors, Inc.	$ 41,188	$ —	$ 36,175	$ —
M-tron Industries, Inc.	—	316	—	227
Total	$ 41,188	$ 316	$ 36,175	$ 227

The material agreements whereby the Company generates revenues and expenses with affiliated entities are discussed below:

Investment Activity with GAMCO Investors, Inc.

Certain balances held and invested in various mutual funds are managed or advised by GAMCO Investors, Inc. or one of its subsidiaries (collectively, "GAMCO" or the "Fund Manager"), which is related to the Company through certain of our shareholders. Investments in related party mutual funds are overseen by the independent Audit Committee of the Board of Directors (the "Audit Committee"). The Audit Committee meets regularly to review the alternatives and has determined the current investments most reflect the Company's objective of lower cost, market return and adherence to having a larger proportion of underlying investments directly in United States Treasuries. For the three months ended March 31, 2026 and 2025 , the Company paid the Fund Manager a fund management fee of approximately 8 basis points per annum, respectively, of the asset balances under management, which are not paid directly by the Company and are deducted prior to a fund striking its net asset value.

As of March 31, 2026 , the balance with the Fund Manager totaled $ 41,188 , all of which is classified within Cash and cash equivalents on the Condensed Consolidated Balance Sheets. As of December 31, 2025 , the balance with the Fund Manager totaled $ 36,175 , all of which is classified within Cash and cash equivalents on the Condensed Consolidated Balance Sheets.

For the three months ended March 31, 2026 , the Company earned income on its investments with the Fund Manager totaling $ 346 , all of which was included in Net investment income on the Condensed Consolidated Statements of Operations. For the three months ended March 31, 2025 , the Company earned income on its investments with the Fund Manager totaling $ 348 , all of which was included in Net investment income on the Condensed Consolidated Statements of Operations.

Transactions with M-tron Industries, Inc.

Transitional Administrative and Management Services Agreement

On October 7, 2022, the separation of the M-tron Industries, Inc. ("Mtron") business from the Company was completed (the "Separation") and the business became an independent, publicly traded company trading on the NYSE American under the stock symbol "MPTI." The Separation was completed through the Company's distribution (the "Distribution") of 100 % of the shares of Mtron's common stock to holders of the Company's common stock as of the close of business on September 30, 2022, the record date for the Distribution.

LGL Group and Mtron entered into an Amended and Restated Transitional Administrative and Management Services Agreement ("Mtron TSA"), which sets out the terms for services to be provided between the two companies post-separation. The current terms result in a net monthly payment of $ 4 per month to MtronPTI.

For the three months ended March 31, 2026 and 2025 , the Company paid Mtron $ 12 under the terms of the Mtron TSA, which were recorded in Engineering, selling and administrative on the Condensed Consolidated Statements of Operations.

Tax Indemnity and Sharing Agreement

LGL Group and Mtron entered into a Tax Indemnity and Sharing Agreement ("Mtron Tax Agreement"), which sets out the terms for which party would be responsible for taxes imposed on the Company if the distribution, together with certain related transactions, were to fail to qualify as a tax-free transaction under Internal Revenue Code ("IRC") Sections 355 and 368 (a)( 1 )(D) if such failure were the result of actions taken after the Distribution by the Company or Mtron.

For the three months ended March 31, 2026 and 2025 , no taxes related to the Distribution have been recorded in the Condensed Consolidated Financial Statements.

13

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

Other Transactions

Mtron and LGL Group have agreed to share salaries and benefits related to certain employees incurred by the Company. For the three months ended March 31, 2026 , the Company reimbursed Mtron $ 28 of the salaries and benefits of certain employees and were recorded in Engineering, selling and administrative on the Condensed Consolidated Statements of Operations. For the three months ended March 31, 2025 , Mtron reimbursed the Company $ 26 of the salaries and benefits of certain employees and were recorded as a reduction to Engineering, selling and administrative on the Condensed Consolidated Statements of Operations.

8. Income Taxes

The Company’s quarterly provision for income taxes is measured using an annual effective tax rate, adjusted for discrete items within the period presented. To determine the annual effective tax rate, the Company estimates both the total income (loss) before income taxes for the full year and the jurisdictions in which that income (loss) is subject to tax. The actual effective tax rate for the full year may differ from these estimates if income (loss) before income taxes is greater than or less than what was estimated or if the allocation of income (loss) to jurisdictions in which it is taxed is different from the estimated allocations.

The effective tax rate on continuing operations for the three months ended March 31, 2026 and 2025 was 22.9 % and 68.9 %, respectively. The effective tax rate differed from the statutory tax rate of 21 % primarily due to the impact of uncertain tax positions and state income taxes.

9. Stock-Based Compensation

Under the Company's 2021 Incentive Plan (the "Plan"), and the prior 2011 Incentive Plan, as amended, stock-based compensation may be issued to employees and non-employee directors. As of March 31, 2026 , 786,512 shares remained available for future issuance under the Plan.

The following table summarizes stock-based compensation expense, which includes expenses related to awards granted under the Plan for the periods indicated:

	Three Months Ended March 31, — 2026	2025
Restricted stock awards	$ 392	$ 9
Stock options	296	—
Total	$ 688	$ 9

Restricted Stock Awards

The following table summarizes restricted stock awards activity for the period indicated:

Balance as of December 31, 2025	36,274	$	5.79	$	210
Granted	152,402		6.45		983
Vested	( 57,028	)	( 6.27	)	( 358	)
Canceled	—		—		—
Balance as of March 31, 2026	131,648	$	6.35	$	835

As of March 31, 2026 , there was $ 703 of total unrecognized compensation cost related to unvested shares granted. The cost is expected to be recognized over a weighted average period of 1.8 years.

Stock Options

The Company estimates the fair value of stock options on the grant date using the Black-Scholes-Merton option-pricing model. The Black-Scholes-Merton option-pricing model requires subjective assumptions, including future stock price volatility and expected time to exercise. Option awards are generally granted with an exercise price equal to the market price of the Company's stock on the grant date.

The following table presents the weighted-average assumptions for stock options granted:

2026	2025
Expected volatility (a)	45.9 %	—
Expected annual dividend yield (b)	0.0 %	—
Risk-free interest rate (c)	3.6 %	—
Expected term, in years (d)	2.7	—

(a) The expected volatility is based on the implied volatility of the Company's historical stock price data over the expected term.

(b) The dividend yield is 0.0 % as the Company is not expected to pay a dividend.

(c) The risk-free interest rate is based on the average U.S. Treasury zero -coupon rate over the four days prior to the grant date. We selected the risk-free rate that is commensurate with the length of the remaining performance period as of the grant date, using interpolation where necessary.

(d) The expected term is the simple average of the vesting periods and the contractual term.

14

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

The following table provides a rollforward of stock option activity for the three months ended March 31, 2026 :

Outstanding as of December 31, 2025	—	Weighted Average Exercise Price — $ —	Weighted Average Grant Date Fair Value — $ —	—	Aggregate Intrinsic Value — $ —
Granted	200,000	7.02	1.87
Exercised	—	—	—
Forfeited	—	—	—
Outstanding as of March 31, 2026	200,000	$ 7.02	$ 1.87	4.8	$ 57
Exercisable as of March 31, 2026	160,000	$ 7.18	$ 2.33	4.8	$ 34

10. Stockholders' Equity

Shares Outstanding

The following table presents a rollforward of outstanding shares for the periods indicated:

Common Stock Issued		Held in Treasury	Common Stock Outstanding		Common Stock Issued	Held in Treasury		Common Stock Outstanding
Shares, beginning of year	6,307,997	( 133,047	)	6,174,950		5,454,639	( 81,584	)	5,373,055
Stock-based compensation	152,402	—		152,402		16,156	—		16,156
Stock issued for settlement of warrants	214,462	—		214,462		837,202	—		837,202
Shares withheld for income taxes	( 1,379	)		( 1,379	)	—	—		—
Repurchase of common stock	—	—		—		—	( 51,463	)	( 51,463	)
Shares, end of period	6,673,482	( 133,047	)	6,540,435		6,307,997	( 133,047	)	6,174,950

Warrants to Purchase Common Stock

On November 16, 2020, the Company issued 5,258,320 "European-style" warrants (the "Warrants") to holders of record of outstanding shares of the Company's common stock, par value $ 0.01 (the "Common Stock") as of November 9, 2020. The Warrants were listed on the NYSE American and traded under the symbol "LGL.WS." Five ( 5 ) Warrants entitled their holder to purchase one ( 1 ) share of LGL Group Common Stock at an exercise price of $ 12.50 and were exercisable at the earlier (i) the expiration of the warrant term, which is November 16, 2025, or (ii) subject to a date acceleration if triggered only after the average volume weighted average price ("VWAP") of LGL Group Common Stock for 30 consecutive trading days is greater than or equal to $ 17.50 . The Warrants also provided for the adjustment of the exercise price and the trigger price for potential acceleration of the exercise date, upon the occurrence of certain dilutive events.

Pursuant to the warrant agreement, the Distribution was a qualifying dilutive event that required an adjustment to the exercise price and the trigger price for potential acceleration of the exercise date. Effective October 18, 2022, the warrant exercise price was adjusted to $ 4.75 and the target trigger price for potential acceleration of the exercise date was adjusted to $ 6.65 ("Adjusted Trigger Price").

On March 4, 2025, the average VWAP of LGL Group Common Stock exceeded the Adjusted Trigger Price for 30 consecutive trading days, which resulted in the Warrants becoming immediately exercisable.

On November 6, 2025, the Company's Board of Directors (the "Board") approved an extension to the expiration date from November 16, 2025, a Sunday, which allowed holders to exercise their Warrants by the close of business on November 17, 2025, to Tuesday December 9, 2025. The Company subsequently extended the expiration date to December 31, 2025.

As of December 31, 2025, Warrant holders exercised 4,186,010 , or 79.6 %, of the Warrants, in a net share settlement of 837,202 shares of Common Stock. The remaining 1,072,310 Warrants expired unexercised in accordance with their terms. However, on January 22, 2026, the Company distributed 214,462 unallocated shares of Common Stock to Warrant holders who elected to participate in the over-subscription privilege. The gross proceeds to the Company were $ 5.0 million.

Share Repurchase Program

On August 29, 2011, the Board authorized an expansion of its previously announced share repurchase program, pursuant to which the Company may repurchase up to an additional 347,491 shares of its common stock in accordance with applicable securities laws. This authorization increased the total number of shares authorized for repurchase under the Company's existing share repurchase program to 797,491 shares, of which 540,000 shares were available to be repurchased, at such times, amounts and prices as the Company shall deem appropriate. No shares were repurchased by the Company in 2026. As of March 31, 2026 , the Company had repurchased a total of 133,047 shares of common stock at a cost of $ 946 , which shares are currently held in treasury.

15

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

11. Earnings Per Share ("EPS")

The following table presents a reconciliation of Net income (loss) and shares used in calculating basic and diluted net income (loss) per common share for the periods indicated:

	Three Months Ended March 31, — 2026		2025
Numerator for EPS:
Net (loss) income	$ ( 605	)	$ 13
Less: Net income attributable to non-controlling interests	17		19
Net loss attributable to LGL Group common stockholders	$ ( 622	)	$ ( 6	)
Denominator for EPS:
Weighted average common shares outstanding - basic	6,410,166		5,352,937
Dilutive effects (a) :
Warrants	—		—
Stock options	—		—
Restricted stock	—		—
Weighted average common shares outstanding - diluted	6,410,166		5,352,937
Loss per common share attributable to LGL Group common stockholders:
Basic	$ ( 0.10	)	$ ( 0.00	)
Diluted	$ ( 0.10	)	$ ( 0.00	)

(a) For the three months ended March 31, 2026 , diluted weighted average common shares outstanding used for calculating earnings per share excludes 50,603 shares issued pursuant to the warrant dividend program completed in January 2026, 49,888 shares issuable upon the exercise of stock options, and 19,523 shares related to restricted stock awards, as the inclusion of these instruments would have been anti-dilutive to the earnings per share calculation. For the three months ended March 31, 2025 , diluted weighted average common shares outstanding used for calculating earnings per share excludes warrants to purchase 1,051,664 shares of common stock as well as 36,274 shares related to restricted stock awards, as the inclusion of these instruments would be anti-dilutive to the earnings per share calculation.

12. Contingencies

In the normal course of business, the Company and its subsidiaries may become defendants in certain product liability, patent infringement, worker claims and other litigation. The Company records a liability when it is probable that a loss has been incurred and the amount is reasonably estimable. The Company is not involved in any legal proceedings other than routine litigation arising in the normal course of business, none of which the Company believes will have a material adverse effect on the Company's business, financial condition or results of operations.

13. Other Financial Statement Information

Inventories, Net

The Company reduces the value of its inventories to net realizable value when the net realizable value is believed to be less than the cost of the item.

The components of inventory as of March 31, 2026 and December 31, 2025 are summarized below:

Raw materials	March 31, 2026 — $ 353	$	374
Work in process	14		8
Finished goods	—		—
Total gross inventory	367		382
Reserve for excess and obsolete inventory	( 89	)	( 85	)
Inventories, net	$ 278	$	297

16

Table of Contents

The LGL Group, Inc.

Notes to the Condensed Consolidated Financial Statements (Unaudited)

(Dollar amounts in thousands, unless otherwise stated)

Intangible Assets, Net

The components of intangible assets as of March 31, 2026 and December 31, 2025 are summarized below:

Intellectual property	March 31, 2026 — $ 214	$	214
Gross intangible assets	214		214
Less: Accumulated amortization	( 205	)	( 199	)
Intangible assets, net	$ 9	$	15

14. Domestic and Foreign Revenues

Significant foreign revenues from operations ( 10% or more of foreign sales) were as follows:

	Three Months Ended March 31, — 2026	2025
Australia	$ 33	$ 30
Netherlands	14	—
Korea	13	19
United Kingdom	12	32
Japan	12	11
Indonesia	12	—
Spain	4	100
Norway	—	34
All other foreign countries	—	24
Total foreign revenues	$ 100	$ 250
Total domestic revenue	$ 582	$ 248

The Company allocates its foreign revenue based on the customer's ship-to location.

15. Subsequent Events

The Company has evaluated events and transactions that occurred after the balance sheet data through the date that the Condensed Consolidated Financial Statements were issued. Based upon this review, the Company did not identify any subsequent events that would have required adjustment or disclosure in the Condensed Consolidated Financial Statements.

17

Table of Contents

ITEM 2. Management ’ s Discussion and Analysis of Financial Condition and Results of Operations

The following discussion and analysis of the Company's financial condition and results of operations should be read in conjunction with the accompanying unaudited Condensed Consolidated Financial Statements, the notes thereto and the other unaudited financial data included in this Quarterly Report on Form 10-Q. The following discussion should also be read in conjunction with the audited consolidated financial statements and the notes thereto, and "Management's Discussion and Analysis of Financial Condition and Results of Operations" included in the Company's Annual Report on Form 10-K for the year ended December 31, 2025, as filed with the SEC on March 30, 2026. The terms "LGL," "LGL Group," "we," "our," "us," or the "Company" refer to The LGL Group, Inc. and its consolidated subsidiaries and unless otherwise defined herein, capitalized terms used herein shall have the same meanings as set forth in our condensed consolidated financial statements and the notes thereto.

Unless otherwise stated, all dollar amounts are in thousands.

In addition to historical data, this discussion contains forward-looking statements about our business, operations and financial performance based on current expectations that involve risks, uncertainties and assumptions. Actual results may differ materially from those discussed in the forward-looking statements as a result of various factors. See the Cautionary Statement Concerning Forward-Looking Statements included in this Quarterly Report on Form 10-Q.

Overview

The Company is a holding company engaged in services, merchant investment, and manufacturing business activities. The Company, through its manufacturing business subsidiary, is engaged in the designing, manufacturing, and marketing of high-performance Frequency and Time Reference Standards that form the basis for timing and synchronization in various applications. The Company's primary markets are communications, networking, aerospace, defense, instrumentation, and industrial markets.

The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of The LGL Group, Inc., its majority-owned subsidiaries, and variable interest entities ("VIE") of which we are the primary beneficiary.

We provide our products and services through our Electronic Instruments and Merchant Investment businesses. Activities not related to our business segments, such as our corporate operations and corporate-level assets and financial obligations, are included in Corporate.

Electronic Instruments Business

We operate our manufacturing business currently through our subsidiary, Precise Time and Frequency, LLC ("PTF"), a globally positioned producer of industrial Electronic Instruments and commercial products and services. Founded in 2002, PTF operates from our design and manufacturing facility in Wakefield, Massachusetts.

Merchant Investment Business

The LGL investment business is comprised of various investment vehicles in which LGL is either shareholder, partner, or has general partner interests, and through which LGL invests its capital. The Company seeks to invest available cash and cash equivalents in liquid investments with a view to enhancing returns as we continue to assess further acquisitions of, or investments in, operating businesses broadly. LGL core strengths include identifying and acquiring undervalued assets and businesses, often through the purchase of securities, increasing value through management, financial or other operational changes, and managing complex legal, regulatory or financial issues, which may include technical, engineering, environmental, zoning, permitting and licensing issues among others.

As of March 31, 2026, LGL Group had investments (classified within Cash and cash equivalents and Marketable securities) with a fair value of approximately $25.9 million. The Company accounts for its Marketable securities under Financial Accounting Standards Board ("FASB") Accounting Standards Codification ("ASC") Topic 321, Investments - Equity Securities ("ASC 321") and as such, its Marketable securities are reported at fair value on its consolidated balance sheets.

Trends and Uncertainties

We are not aware of any material trends or uncertainties, other than global macroeconomic conditions affecting our industry generally that may reasonably be expected to have a material impact, favorable or unfavorable, on our revenues or income other than those listed below and those listed in Item 1A, Risk Factors, of our Annual Report on Form 10-K for the year ended December 31, 2025, as filed with the SEC on March 30, 2026.

Changing Interest Rates

The U.S. Federal Reserve decreased the federal funds rate a total of three times throughout 2025, resulting in a range from 3.50% to 3.75% as of December 31, 2025. Through the date of filing of this Quarterly Report on Form 10-Q, the Federal Reserve has maintained the federal funds rate in the same range as of December 31, 2025. If interest rates continue to decline, the returns generated by our investments in U.S. Treasuries could be adversely impacted.

Tariffs

The current U.S. federal administration has imposed tariffs on certain products and materials entering the United States imported from other countries. Additionally, foreign governments have imposed retaliatory tariffs on products and materials exported from the United States. Following the U.S. Supreme Court’s February 2026 decision striking down certain tariffs, the Trump Administration announced its intention to invoke other laws to collect tariffs and announced new tariffs on imports from all countries. There remains substantial uncertainty regarding the duration of existing and newly announced tariffs, potential changes or pauses to such tariffs, tariff levels, and whether further additional tariffs or other retaliatory actions may be imposed, modified, or suspended, and the impacts of such actions on our business.

18

Table of Contents

Results of Operations - Consolidated

The following table presents our Condensed Statements of Operations for the periods indicated:

(in thousands)	Three Months Ended March 31, — 2026		2025		$ Change	% Change
Revenues:
Net sales	$ 682		$ 498		$ 184		36.9	%
Net investment income	389		417		(28	)	(6.7	%)
Net gains	14		3		11		366.7	%
Total revenues	1,085		918		167		18.2	%
Expenses:
Manufacturing cost of sales	334		237		97		40.9	%
Engineering, selling and administrative	1,536		640		896		140.0	%
Total expenses	1,870		877		993		113.2	%
(Loss) income before income taxes	(785	)	41		(826	)	(2,014.6	%)
Income tax (benefit) expense	(180	)	28		(208	)	(742.9	%)
Net (loss) income	(605	)	13		(618	)	(4,753.8	%)
Less: Net income attributable to non-controlling interests	17		19		(2	)	(10.5	%)
Net loss attributable to LGL Group common stockholders	$ (622	)	$ (6	)	$ (616	)	(10,266.7	%)

Three months ended March 31, 2026 compared to three months ended March 31, 2025

Total Revenues

Total revenues increased $167, or 18.2%, from $918 for the three months ended March 31, 2025 to $1,085 for the three months ended March 31, 2026. The increase was primarily due to a $184, or 36.9%, increase in Net sales from $498 for the three months ended March 31, 2025 to $682 for the three months ended March 31, 2026 driven by higher backlog as of December 31, 2025.

The increase is partially offset by a $28, or 6.7%, decrease in Net investment income from $417 for the three months ended March 31, 2025 to $389 for the three months ended March 31, 2026 primarily due to lower yields on investments in U.S. Treasury money market funds.

Total Expenses

Total expenses increased $993, or 113.2%, from $877 for the three months ended March 31, 2025 to $1,870 for the three months ended March 31, 2026. The following items contributed to the increase:

• a $97, or 40.9%, increase in Manufacturing costs of sales from $237 for the three months ended March 31, 2025 to $334 for the three months ended March 31, 2026 driven by higher revenues as well as general increases in the cost of materials and components; and

• a $896, or 140.0%, increase in Engineering, selling and administrative from $640 for the three months ended March 31, 2025 to $1,536 for the three months ended March 31, 2026 driven by higher stock-based compensation associated with non-cash equity awards granted to officers in January 2026.

Gross Margin

Gross margin (Net sales less Manufacturing cost of sales as a percentage of Net sales) decreased 140 basis points from 52.4% for the three months ended March 31, 2025 to 51.0% for the three months ended March 31, 2026 reflecting a lower margin product mix as well as general increases in the cost of materials and components.

Income Tax Expense

Income tax expense decreased $208, or 742.9%, from $28 for the three months ended March 31, 2025 to ($180) for the three months ended March 31, 2026 primarily due to the decrease in Income before income taxes.

Net Income Attributable to Non-Controlling Interests

Net income attributable to non-controlling interests decreased $2 from $19 for the three months ended March 31, 2025 to $17 for the three months ended March 31, 2026 primarily due to lower yields on U.S. Treasury money market funds.

Backlog

As of March 31, 2026, our order backlog was $1,525, an increase of $900, or 144.0%, from $625 as of December 31, 2025 and an increase of $1,230, or 416.9%, from $295 as of March 31, 2025. The backlog of unfilled orders includes amounts based on signed contracts likely to be fulfilled largely in the next 12 months but usually will ship within the next 90 days. Order backlog is adjusted quarterly to reflect project cancellations, deferrals, and revised project scope and cost, if any.

19

Table of Contents

Results of Operations - Operating Segments

Electronic Instruments

The following table presents income from continuing operations of our Electronic Instruments segment for the periods indicated:

(in thousands)	Three Months Ended March 31, — 2026	2025	$ Change	% Change
Revenues:
Net sales	$ 682	$ 498	$ 184		36.9	%
Total revenues	682	498	184		36.9	%
Expenses:
Manufacturing cost of sales	334	237	97		40.9	%
Engineering, selling and administrative	331	242	89		36.8	%
Total expenses	665	479	186		38.8	%
Income before income taxes	$ 17	$ 19	$ (2	)	(10.5	%)

Three months ended March 31, 2026 compared to three months ended March 31, 2025

Income Before Income Taxes

Income before income taxes decreased $2, or 10.5%, from $19 for the three months ended March 31, 2025 to $17 for the three months ended March 31, 2026. The decrease was primarily due to the $186, or 38.8%, increase in Total expenses driven by higher Manufacturing cost of sales reflecting higher revenues and general increases in the cost of materials and components as well as engineering and sales and marketing costs consistent with the growth in Net sales partially offset by the $184, or 36.9%, increase in Net sales reflecting higher backlog as of December 31, 2025.

Merchant Investment

The following table presents income from continuing operations of our Merchant Investment segment for the periods indicated:

(in thousands)	Three Months Ended March 31, — 2026	2025	$ Change	% Change
Revenues:
Net investment income	$ 223	$ 247	$ (24	)	(9.7	%)
Total revenues	223	247	(24	)	(9.7	%)
Expenses:
Engineering, selling and administrative	125	94	31		33.0	%
Total expenses	125	94	31		33.0	%
Income before income taxes	$ 98	$ 153	$ (55	)	(35.9	%)

Three months ended March 31, 2026 compared to three months ended March 31, 2025

Income Before Income Taxes

Income before income taxes decreased $55 from $153 for the three months ended March 31, 2025 to $98 for the three months ended March 31, 2026 due to lower yields on investments in U.S. Treasury money market funds as well as higher corporate allocations.

Corporate

The following table presents income from continuing operations of our Corporate segment for the periods indicated:

(in thousands)	Three Months Ended March 31, — 2026		2025		$ Change	% Change
Revenues:
Net investment income	$ 166		$ 170		$ (4	)	(2.4	%)
Net gains	14		3		11		366.7	%
Total revenues	180		173		7		4.0	%
Expenses:
Engineering, selling and administrative	1,080		304		776		255.3	%
Total expenses	1,080		304		776		255.3	%
Loss before income taxes	$ (900	)	$ (131	)	$ (769	)	(587.0	%)

Three months ended March 31, 2026 compared to three months ended March 31, 2025

Loss Before Income Taxes

Loss before income taxes increased $769, or 587.0%, from ($131) for the three months ended March 31, 2025 to ($900) for the three months ended March 31, 2026. The increase was primarily due to higher stock-based compensation discussed above.

20

Table of Contents

Liquidity and Capital Resources

Overview

Liquidity refers to our ability to access sufficient sources of cash to meet the requirements of our operating, investing and financing activities.

Capital refers to our long-term financial resources available to support business operations and future growth.

Our ability to generate and maintain sufficient liquidity and capital depends on the profitability of the businesses, timing of cash flows, general economic conditions and access to the capital markets and the other sources of liquidity and capital described herein.

As of March 31, 2026 and December 31, 2025, Cash and cash equivalents were $46,646 and $41,514, respectively.

Cash Flow Activity

The following table presents the cash flow activity for the periods indicated:

(in thousands)	As of March 31, — 2026	2025
Cash and cash equivalents, beginning of period	$ 41,514	$ 41,585
Cash provided by operating activities	501	340
Cash provided by financing activities	4,631	—
Net change in cash and cash equivalents	5,132	340
Cash and cash equivalents, end of period	$ 46,646	$ 41,925

Operating Activities

Cash provided by operating activities was $501 for the three months ended March 31, 2026 compared to $340 for the three months ended March 31, 2025, an increase of $161, primarily due to the following:

• Lower net income

• Higher non-cash adjustments, including:

• Stock-based compensation increased $679 from $9 for the three months ended March 31, 2025 to $688 for the three months ended March 31, 2026;

• Working capital movements, including:

• Accounts receivable, which decreased $288 for the three months ended March 31, 2026 compared to a decrease of $187 for the three months ended March 31, 2025, due to timing of collection of receivables;

• Accounts payable, accrued compensation and commissions, other accrued expenses and liabilities, and other liabilities, which increased $299 for the three months ended March 31, 2026 compared to an increase of $128 for the three months ended March 31, 2025, due to higher expenses incurred and the timing of payments.

Our working capital metrics and ratios were as follows:

(in thousands)	March 31, 2026	December 31, 2025
Current assets	$ 47,516	$ 46,324
Less: Current liabilities	1,211	915
Working capital	$ 46,305	$ 45,409
Current ratio	39.2	50.6

Management continues to focus on efficiently managing working capital requirements to match operating activity levels and will seek to deploy the Company’s working capital where it will generate the greatest returns.

21

Table of Contents

Financing Activities

Cash provided by financing activities was $4,631 for the three months ended March 31, 2026 compared to $0 for the three months ended March 31, 2025, an increase of $4,631, primarily due to the settlement of warrants in January 2026.

Capital Resources

We believe that existing cash and cash equivalents, marketable securities and cash generated from operations will provide sufficient liquidity to meet our ongoing working capital and capital expenditure requirements for the next 12 months from the date of this filing and for the foreseeable future.

Our Board has adhered to a practice of not paying cash dividends. This policy takes into account our long-term growth objectives, including our anticipated investments for organic growth, potential acquisitions and stockholders' desire for capital appreciation of their holdings. No cash dividends have been paid to the Company's stockholders since January 30, 1989, and none are expected to be paid for the foreseeable future.

Contractual Obligations

As of March 31, 2026, there have been no material changes in our contractual obligations from December 31, 2025, a description of which may be found in Part II, Item 7. Management Discussion and Analysis - Liquidity and Capital Resources - Contractual Obligations in the 2025 Annual Report.

Critical Accounting Estimates

Our accompanying Condensed Consolidated Financial Statements are prepared in conformity with U.S. GAAP, which requires management to make estimates and assumptions that affect the amounts reported in our financial statements and accompanying footnotes. These estimates are made and evaluated on an on-going basis using information that is currently available as well as various other assumptions believed to be reasonable under the circumstances. Actual results could differ from those estimates, perhaps in material adverse ways, and those estimates could be different under different assumptions or conditions. For a discussion of the Company’s critical accounting estimates, see Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations in our Annual Report on Form 10-K for the year ended December 31, 2025.

ITEM 3. Quantitative and Qualitative Disclosures About Market Risk

Not applicable.

ITEM 4. Controls and Procedures

Evaluation of Disclosure Controls and Procedures

We maintain disclosure controls and procedures that are designed to ensure that information required to be disclosed in our reports under the Securities Exchange Act of 1934, as amended (the "Exchange Act") is recorded, processed, summarized and reported within the time periods specified in the rules and forms, and that such information is accumulated and communicated to us, including our Principal Executive Officer and Principal Financial Officer, as appropriate, to allow timely decisions regarding required disclosure. Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

As required by Rules 13a-15(b) and 15d-15(b) of the Exchange Act, an evaluation as of March 31, 2026 was conducted under the supervision and with the participation of our management, including our Principal Executive Officer and Principal Financial Officer, of the effectiveness of our disclosure controls and procedures (as defined in Rules 13a-15(e) and 15d-15(e) under the Exchange Act). Based on this evaluation, our Principal Executive Officer and Principal Financial Officer concluded that our disclosure controls and procedures, as of March 31, 2026, were effective.

Changes in Internal Control Over Financial Reporting

There were no changes in the Company’s internal control over financial reporting during the quarter ended March 31, 2026 that have materially affected, or are reasonably likely to materially affect, the Company’s internal control over financial reporting.

22

Table of Contents

PART II

OTHER INFORMATION

ITEM 1. Legal Proceedings

In the ordinary course of business, we may become subject to litigation or claims. We are not aware of any material pending legal proceedings, other than ordinary routine litigation incidental to our business, to which we or our subsidiaries are a party or to which our properties are subject.

Item 1A. Risk Factors

For a discussion of the Company's potential risks and uncertainties, refer to Part I, Item 1A. Risk Factors in the 2025 Annual Report and Trends and Uncertainties in Management's Discussion and Analysis of Financial Condition and Results of Operations in Part I, Item 2. of this Quarterly Report on Form 10-Q.

We are not aware of any material trends or uncertainties, other than national economic conditions affecting our industry generally, that may reasonably be expected to have a material impact, favorable or unfavorable, on our revenues or income other than those listed in Item 1A, Risk Factors, of our Annual Report on Form 10-K for the year ended December 31, 2025.

ITEM 5. Other Information

Rule 10b5 - 1 Trading Arrangements

During the three months ended March 31, 2026 , none of our directors or officers, as defined in Section 16 of the Exchange Act, adopted or terminated a "Rule 10b5 - 1 trading arrangement" or a "non-Rule 10b5 - 1 trading arrangement," as each term is defined in Item 408 of Regulation S-K of the Exchange Act.

23

Table of Contents

ITEM 6. Exhibits

The following exhibits are included, or incorporated by reference, in this Quarterly Report on Form 10-Q for the quarterly period ended March 31, 2026 (and are numbered in accordance with Item 601 of Regulation S-K):

Exhibit No.	Description	Incorporated by Reference — Form	File No.	Exhibit	Filing Date	Filed Herewith
3.	Articles of Incorporation and Bylaws.
3.1	Certificate of Incorporation of The LGL Group, Inc.	8-K	001-00106	3.1	August 31, 2007
3.2	The LGL Group, Inc. By-Laws.	8-K	001-00106	3.2	August 31, 2007
3.3	The LGL Group, Inc. Amendment No. 1 to By-Laws.	8-K	001-00106	3.1	June 17, 2014
3.4	The LGL Group, Inc. Amendment No. 2 to By-Laws.	8-K	001-00106	3.4	February 21, 2020
3.5	The LGL Group, Inc. Amendment No. 3 to By-Laws.	8-K	001-00106	3.1	February 26, 2020
3.6	The LGL Group, Inc. Certificate of Amendment to Certificate of Incorporation .	8-K	001-00106	3.1	January 4, 2022
31.1	Certification of the Principal Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.					X
31.2	Certification of the Principal Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.					X
32.1	Certification of the Principal Executive Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*					X
32.2	Certification of the Principal Financial Officer pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.*					X
101.INS	Inline XBRL Instance Document – the instance document does not appear in the Interactive Data File because its XBRL tags are embedded within the Inline XBRL document.					X
101.SCH	Inline XBRL Taxonomy Extension Schema Document					X
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document					X
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document					X
101.LAB	Inline XBRL Taxonomy Extension Label Linkbase Document					X
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document					X
104	The cover page for the Company’s Quarterly Report on Form 10-Q has been formatted in Inline XBRL and contained in Exhibit 101					X

• In accordance with Item 601(b)(32) of Regulation S-K, this Exhibit is not deemed "filed" for purposes of Section 18 of the Exchange Act or otherwise subject to the liabilities of that section. Such certifications will not be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except to the extent that the registrant specifically incorporates it by reference.

24

Table of Contents

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

May 11, 2026	THE LGL GROUP, INC. (Registrant) — By:	/s/ Jason D. Lamb
		Jason D. Lamb
		Chief Executive Officer (Principal Executive Officer)
May 11, 2026	By:	/s/ Patrick Huvane
		Patrick Huvane
		Executive Vice President - Business Development (Principal Financial Officer)

25