[Form 3] CALIX, INC Initial Statement of Beneficial Ownership

Rhea-AI Filing Summary

Calix, Inc. (CALX) disclosed the equity holdings of its Chief Operating Officer. The executive directly owns 1,928 shares of Calix common stock. In addition, the filing lists several stock option awards to purchase Calix common stock at exercise prices ranging from $34.26 to $51.83 per share, covering blocks of 200,000, 42,555, 107,775, 56,350, and two grants of 195,000 shares.

The options generally vest 25% on the first anniversary of the grant date, with the remaining 75% vesting in substantially equal quarterly installments over the following 36 months, subject to continued service. As of November 25, 2025, portions of several grants are already vested and exercisable, including 125,000 shares from one grant, 26,597 shares from another, 47,151 shares from a third, and 17,622 shares from a fourth.

SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Durocher John

(Last) (First) (Middle)

C/O CALIX, INC.

3155 OLSEN DRIVE, SUITE 450

(Street)

SAN JOSE CA 95117

(City) (State) (Zip)

2. Date of Event Requiring Statement (Month/Day/Year)
11/16/2025

3. Issuer Name and Ticker or Trading Symbol
CALIX, INC [ (CALX) ]

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	COO

5. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	1,928	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Stock Option (right to buy)	(1)	03/24/2033	Common Stock	200,000	$51.83	D
Stock Option (right to buy)	(2)	03/24/2033	Common Stock	42,555	$51.83	D
Stock Option (right to buy)	(3)	02/08/2034	Common Stock	107,775	$34.26	D
Stock Option (right to buy)	(4)	02/08/2034	Common Stock	56,350	$34.26	D
Stock Option (right to buy)	(5)	01/31/2035	Common Stock	195,000	$39.68	D
Stock Option (right to buy)	(6)	01/31/2035	Common Stock	195,000	$39.68	D

Explanation of Responses:

1. 25% of the shares subject to the stock option grant vested on March 24, 2024, with the remainder vesting quarterly thereafter in substantially equal installments over the next 36 months, subject to the reporting person's service through each applicable vesting date. As of November 25, 2025, 125,000 shares subject to the option grant are fully vested and exercisable.

2. 25% of the shares subject to the stock option grant vested on March 24, 2024, with the remainder vesting quarterly thereafter in substantially equal installments over the next 36 months, subject to the reporting person's service through each applicable vesting date. As of November 25, 2025, 26,597 shares subject to the option grant are fully vested and exercisable.

3. 25% of the shares subject to the stock option grant vested on February 8, 2025, with the remainder vesting quarterly thereafter in substantially equal installments over the next 36 months, subject to the reporting person's service through each applicable vesting date. As of November 25, 2025, 47,151 shares subject to the option grant are fully vested and exercisable.

4. 25% of the shares subject to the stock option grant vested on February 8, 2025, with the remainder vesting quarterly thereafter in substantially equal installments over the next 36 months, subject to the reporting person's service through each applicable vesting date. As of November 25, 2025, 17,622 shares subject to the option grant are fully vested and exercisable.

5. 25% of these stock options will vest on the first anniversary of the grant date. Thereafter, the remainder of these stock options will vest quarterly in substantially equal installments over the next 36 months, subject to Reporting Person's continued service through each vesting date.

6. The nonqualified stock option award shall vest: (i) as to 25% of the shares of common stock subject to the stock option award, on January 31, 2026; and (ii) as to the remaining 75% of the shares of common stock subject to the stock option award, quarterly in equal installments over 36 months from January 31, 2026, subject to the reporting person's continued employment with Calix through the applicable vesting dates.

Remarks:

	/s/ Tom Gemetti as Attorney-in-Fact for John Durocher	11/25/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What did Calix (CALX) report in this insider ownership filing?

Calix reported the equity holdings of its Chief Operating Officer, including directly owned common stock and multiple stock option awards with detailed vesting schedules.

How many Calix (CALX) common shares does the COO directly own?

The Chief Operating Officer directly owns 1,928 shares of Calix common stock.

What stock option grants for Calix (CALX) are disclosed?

The filing lists stock options to buy Calix common stock in amounts of 200,000, 42,555, 107,775, 56,350, and two grants of 195,000 shares, at exercise prices of $51.83 and $34.26 and $39.68 per share.

How do the Calix (CALX) COO stock options vest?

For the options described, 25% of each grant vests on the first anniversary of the grant date, with the remaining 75% vesting in substantially equal quarterly installments over 36 months, subject to continued service.

How many Calix (CALX) option shares are already vested and exercisable?

As of November 25, 2025, 125,000, 26,597, 47,151, and 17,622 shares from four separate option grants are stated as fully vested and exercisable.

What is the role of the reporting person at Calix (CALX)?

The reporting person is identified as an Officer of Calix, serving in the role of COO (Chief Operating Officer).