Calix (CALX) director Carl Russo reports grant of 11,663 stock options

Rhea-AI Filing Summary

Calix, Inc. director and 10% owner Carl Russo reported an automatic grant of employee stock options on common stock. The filing shows an award of 11,663 stock options with an exercise price of $53.59 per share, dated January 2, 2026. These options begin to vest with respect to 25% of the underlying shares on each anniversary of the grant date, starting one year after January 2, 2026, and are listed as exercisable from January 2, 2027 until expiration on January 2, 2036. Following this grant, Russo is shown as directly holding 11,663 derivative securities tied to Calix common stock.

SEC Form 4

FORM 4

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

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

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

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Russo Carl

(Last) (First) (Middle)

C/O CALIX, INC.

3155 OLSEN DRIVE, SUITE 450

(Street)

SAN JOSE CA 95117

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
01/02/2026

4. 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 Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Employee Stock Options (right to buy)	$53.59	01/02/2026		A		11,663		01/02/2027(1)	01/02/2036	Common Stock	11,663	$0	11,663	D

Explanation of Responses:

1. The automatically awarded option vests and becomes exercisable with respect to 25% of the shares of common stock underlying the option on each anniversary of the date of grant (January 2, 2026).

Remarks:

	/s/ Tom Gemetti as Attorney-in-Fact for Carl Russo	01/05/2026
	** 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 4 (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 insider transaction did CALX report for Carl Russo?

The report shows that Carl Russo, a director and 10% owner of Calix, Inc., received an automatic grant of 11,663 employee stock options on the company’s common stock.

What is the exercise price of Carl Russo’s Calix (CALX) stock options?

The employee stock options reported for Carl Russo have an exercise price of $53.59 per share for Calix common stock.

How do Carl Russo’s new Calix stock options vest?

According to the disclosure, the automatically awarded option vests and becomes exercisable as to 25% of the shares of common stock underlying the option on each anniversary of the January 2, 2026 grant date.

What are the exercisable and expiration dates of the CALX options granted to Carl Russo?

The filing lists the employee stock options as first exercisable on January 2, 2027 with an expiration date of January 2, 2036.

How many derivative securities does Carl Russo beneficially own after this Calix transaction?

After the reported grant, Carl Russo is shown as beneficially owning 11,663 derivative securities (employee stock options) related to Calix common stock, held directly.

What is SEC Form 4 in the context of Calix (CALX)?

Form 4 is a required SEC filing where Calix insiders, such as directors and 10% owners, report changes in their beneficial ownership of the company’s securities, including new stock option grants.