Calix (CALX) CFO exercises 27,000 options into common shares

Rhea-AI Filing Summary

Calix, Inc. Chief Financial Officer Cory Sindelar reported exercising stock options and receiving additional common shares. On February 2, 2026, he exercised a stock option for 27,000 shares at an exercise price of $5.05 per share, increasing his direct common stock holdings to 103,555 shares.

The option transaction, reported as a derivative security, left him with 148,000 stock options beneficially owned after the exercise. According to the footnote, all shares subject to this option were fully vested and exercisable as of October 1, 2021.

Insider Trade Summary

27,000 shares exercised/converted

Mixed 2 txns

Insider SINDELAR CORY

Role Chief Financial Officer

Type	Security	Shares	Price	Value
Exercise	Stock Option (right to buy)	27,000	$0.00	--
Exercise	Common Stock	27,000	$5.05	$136K

Holdings After Transaction: Stock Option (right to buy) — 148,000 shares (Direct); Common Stock — 103,555 shares (Direct)

Footnotes (1)

1. [object Object]

Form 4 Insider Transactions: What Each Field Means →

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

SINDELAR CORY

(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)

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

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

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
Common Stock	02/02/2026		M		27,000	A	$5.05	103,555	D

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
Stock Option (right to buy)	$5.05	02/02/2026		M			27,000	(1)	10/01/2027	Common Stock	27,000	$0	148,000	D

Explanation of Responses:

1. 100% of the shares subject to the option were fully vested and exercisable on October 1, 2021.

Remarks:

	/s/ Tom Gemetti as Attorney-in-Fact for Cory Sindelar	02/03/2026
	** 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 Calix (CALX) report for its CFO?

Calix reported that CFO Cory Sindelar exercised stock options for 27,000 shares on February 2, 2026. The exercise converted options into common stock and increased his directly held Calix common shares to 103,555 after the transaction.

How many Calix common shares does the CFO own after this Form 4?

After the reported transaction, CFO Cory Sindelar directly owns 103,555 shares of Calix common stock. This figure reflects the addition of 27,000 shares acquired through the option exercise reported with a February 2, 2026 transaction date.

What were the key terms of the Calix CFO’s stock option exercise?

The CFO exercised a stock option for 27,000 Calix shares at an exercise price of $5.05 per share. The derivative line shows 27,000 underlying common shares and notes the option’s expiration date as October 1, 2027 for this option grant.

How many Calix stock options does the CFO still hold after this filing?

Following the exercise, CFO Cory Sindelar beneficially owns 148,000 stock options. These are derivative securities reported as stock options with an exercise price of $5.05 and an expiration date of October 1, 2027 for the specific option referenced.

What does the vesting footnote in the Calix Form 4 indicate?

The footnote states that 100% of the shares subject to the reported option were fully vested and exercisable on October 1, 2021. This means the CFO had the right to exercise all option shares from that date forward under the grant’s terms.

Who signed the Calix Form 4 reporting the CFO’s transaction?

The Form 4 was signed by Tom Gemetti as Attorney-in-Fact for Cory Sindelar. This indicates the filing was submitted under a power of attorney authorizing Gemetti to sign SEC ownership reports on behalf of the Calix Chief Financial Officer.