Five9, Inc. — Governance Information 2026

May 26, 2026

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): May 26, 2026

FIVE9, INC.

(Exact name of Registrant as specified in its charter)

Delaware	001-36383	94-3394123
(State or other jurisdiction of incorporation)	(Commission File No.)	(I.R.S. Employer Identification No.)

3001 Bishop Drive, Suite 350

San Ramon, CA 94583

(Address of Principal Executive Offices) (Zip Code)

Registrant’s telephone number, including area code: ( 925 ) 201-2000

Not Applicable

(Former name or former address if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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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 $0.001 per share	FIVN	The NASDAQ Global Market

Indicated by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).
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. ☐

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

On May 20, 2026, the stockholders of Five9, Inc. (the “Company”), at the Company’s 2026 Annual Meeting of Stockholders, approved the Company’s Amended and Restated Certificate of Incorporation, which was filed on May 20, 2026, with the Secretary of State of the State of Delaware (the “A&R Charter”) to (i) effect the declassification of the Board of Directors (the “Board”) and (ii) eliminate supermajority voting requirements, as set forth in the A&R Charter.

On May 26, 2026, the Board of the Company approved an amendment and restatement of the Company’s Amended and Restated Bylaws (as amended and restated, the “Bylaws”), effective as of that date, to align the Bylaws with the declassification provisions of the A&R Charter.

The foregoing description is qualified in its entirety by reference to the full text of the A&R Charter and Bylaws, copies of which are attached hereto as Exhibits 3.1 and 3.2, respectively, and are incorporated herein by reference.

Exhibit No.	Description
3.1	Amended and Restated Certificate of Incorporation of Five9, Inc .
3.2	Amended and Restated Bylaws of Five9, Inc.
104	The cover page from this Current Report on Form 8-K, formatted in Inline XBRL.

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 hereunto duly authorized.

/s/ Bryan Lee
Bryan Lee
Chief Financial Officer