Form 4 for CALX CALIX, INC

Accepted 2026-02-17 00:00:00 ET · period of report 2026-02-12 · accession 0002098235-26-000002 · SEC index · Original document

Summary rows

Aggregated the way they appear in lists: one row per insider, transaction code and security table.

X	Filed	Traded	Ticker	Insider	Title	Type	Price	Qty	Owned	ΔOwn	Value
D	2026-02-17	2026-02-14	CALX	Durocher John	COO	A - Grant	$45.32	+439	2,367	+23%	+$19.9K
D	2026-02-17	2026-02-12	CALX	Durocher John	COO	A - Grant	$0.00	+195.0K	195.0K	New	$0

Purchase Sale Sale after option exercise All abbreviations

#	Table	Security	Date	Code	A/D	Shares	Price	Owned after	Own	Exercise / expiry	Underlying	Footnotes
1	Common	Common Stock	2026-02-14	A	A	439	$45.32	2,367	D	—	—	(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.
2	Derivative	Stock Option (right to buy)	2026-02-12	A	A	195,000	$0.00	195,000	D	$39.68 · 2026-01-31 to 2035-01-31	195,000 Common Stock	(F3) On January 31, 2025, the reporting person was granted a performance-based option to purchase 195,000 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.