[Form 4] Harmonic Inc Insider Trading Activity

Rhea-AI Filing Summary

Timothy C. Chu, identified as a Director and an officer (General Counsel & SVP, HR) of Harmonic Inc. (HLIT), reported transactions dated 08/15/2025. The filing shows a non‑derivative acquisition of 11,276 shares (code M) at $0, bringing reported beneficial ownership to 116,115 shares (direct). The same date shows a disposition of 3,968 shares (code F) at $8.97, leaving 112,147 shares reported as beneficially owned. In derivatives, the report lists restricted stock unit awards executed 08/15/2025: 5,223 RSUs (underlying 5,223 common shares, showing 10,446 shares reported) with dates 02/15/2024 and 02/15/2026, and 6,053 RSUs (underlying 6,053 common shares, showing 36,320 shares reported) with dates 02/15/2025 and 02/15/2027. The filer signed via attorney‑in‑fact on 08/19/2025.

Positive

• Receipt of equity awards: Acquisition of 11,276 common shares (code M) at $0 on 08/15/2025 indicates compensation- or grant-related equity recognition.
• Restricted stock units granted: Two RSU awards totaling 11,276 RSUs (5,223 and 6,053) were reported with explicit exercisable/expiration dates.

Negative

• Insider sale: Disposition of 3,968 common shares at $8.97 on 08/15/2025 reduced direct holdings.
• Limited context: Form 4 does not state purpose of sale or tax/vesting instructions, so intent is not disclosed.

Insights

Financial Analyst

TL;DR: Insider received equity awards and sold a small portion of shares; overall holdings remain substantial and the transactions appear routine.

The filing documents an officer/director receiving 11,276 shares and multiple RSU grants on 08/15/2025 while disposing of 3,968 shares at $8.97. The net change leaves reported direct beneficial ownership above 100,000 shares. These items are consistent with routine compensation and occasional liquidity events for insiders. No debt, option exercises for cash, or other atypical derivative activity is disclosed. Impact on outstanding share count or control is not evident from this Form 4 alone.

Corporate Governance Expert

TL;DR: Transactions combine grant and sale, typical for executives; disclosures appear complete and appropriately coded.

The report uses standard transaction codes (M for award, F for sale) and lists vesting/exercise-related dates for RSUs. The presence of both awards and a sale on the same date suggests compensation vesting with a partial sale for liquidity or tax purposes, though the form does not state intent. Reporting was executed by an attorney‑in‑fact and attested on 08/19/2025. From a governance perspective, no flags such as derivative hedging, 10% ownership shifts, or insider trading policy breaches are evident solely from this filing.

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^*

Chu Timothy C

(Last) (First) (Middle)

2590 ORCHARD PARKWAY

(Street)

SAN JOSE CA 95131

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
HARMONIC INC. [ HLIT ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Counsel & SVP, HR

3. Date of Earliest Transaction (Month/Day/Year)
08/15/2025

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	08/15/2025		M		11,276	A	$0	116,115	D
Common Stock	08/15/2025		F		3,968	D	$8.97	112,147	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
Restricted Stock Units(1)	$0	08/15/2025		M			5,223	02/15/2024	02/15/2026	Common Stock	5,223	$0	10,446	D
Restricted Stock Units(1)	$0	08/15/2025		M			6,053	02/15/2025	02/15/2027	Common Stock	6,053	$0	36,320	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of HLIT common stock.

	/s/ Wendi Ninh, Attorney-in-Fact	08/19/2025
	** 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 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

Who filed this Form 4 for HLIT and what is their role?

The filing was made by Timothy C. Chu, identified as a Director and an officer with title General Counsel & SVP, HR.

What transactions did Timothy C. Chu report on 08/15/2025 for HLIT?

He reported an acquisition of 11,276 common shares (code M) at $0 and a disposition of 3,968 shares (code F) at $8.97.

What restricted stock units (RSUs) were reported in the Form 4?

The Form 4 lists RSU items dated 08/15/2025: 5,223 RSUs with dates 02/15/2024 and 02/15/2026, and 6,053 RSUs with dates 02/15/2025 and 02/15/2027.

How many shares did the reporting person beneficially own after the transactions?

The filing shows 116,115 shares following the $0 acquisition and 112,147 shares following the reported sale, each listed as direct ownership.

When was the Form 4 signed and how was it executed?

The Form 4 was signed by an attorney‑in‑fact, /s/ Wendi Ninh, with a signature date of 08/19/2025.

Does this Form 4 disclose the reason for the sale of shares?

No. The filing records the sale (code F) but does not disclose the reason or any trading plan within the Form 4 itself.