CALIX, INC — Director's Dealing 2026

Feb 17, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CALIX, INC ((CALX))
CIK: 0001406666
Period of Report: 2026-02-12

Reporting Person: SINDELAR CORY (Chief Financial Officer)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-14	Common Stock	A	439	$45.322	Acquired	103994	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-12	Stock Option (right to buy)	$39.68	A	170000	Acquired	2035-01-31	Common Stock (170000)	Direct

Footnotes

F1: The reporting person is voluntarily reporting the acquisition of shares of the issuer's common stock pursuant to the Calix, Inc. Amended and Restated Employee Stock Purchase Plan ("ESPP") for the ESPP purchase period of August 15, 2025 through February 14, 2026. This transaction is exempt under Rule 16b-3(c).

F2: In accordance with the ESPP, these shares were purchased based on 85% of the closing price of the issuer's common stock on February 13, 2026, the last trading day of the purchase period.

F3: On January 31, 2025, the reporting person was granted a performance-based option to purchase 170,000 shares of common stock. On February 12, 2026, the Compensation Committee determined that the performance criteria governing 100% of the grant had been achieved. The option vests: (i) as to 25% of the shares of common stock subject to the stock option, on January 31, 2026; and (ii) as to the remaining 75% of the shares of common stock subject to the option, quarterly in equal installments over 36 months from January 31, 2026, subject to continued employment with Calix through the applicable vesting dates.