Harmonic (HLIT) SVP exercises 3,750 RSUs with 1,042 shares for taxes

Rhea-AI Filing Summary

Harmonic Inc. senior vice president Ronald J. Glahn exercised restricted stock units and settled related taxes in shares. On April 15, 2026, he exercised 3,750 restricted stock units, receiving an equal number of Harmonic common shares. Each restricted stock unit represents a contingent right to receive one share of HLIT common stock.

On the same date, 1,042 common shares were withheld at $9.88 per share to cover tax obligations, a non‑market, tax-withholding disposition rather than an open-market sale. After these transactions, Glahn directly held 35,890 shares of Harmonic common stock.

Insider Trade Summary

3,750 shares exercised/converted

Mixed 3 txns

Insider Glahn Ronald J

Role SVP, Global Sales, Broadband

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	3,750	$0.00	--
Exercise	Common Stock	3,750	$0.00	--
Tax Withholding	Common Stock	1,042	$9.88	$10K

Holdings After Transaction: Restricted Stock Units — 15,000 shares (Direct); Common Stock — 36,932 shares (Direct)

Footnotes (1)

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Key Figures

RSUs exercised: 3,750 units Tax-withholding shares: 1,042 shares Tax-withholding price: $9.88 per share +3 more

6 metrics

RSUs exercised 3,750 units Restricted stock units converted to common shares on April 15, 2026

Tax-withholding shares 1,042 shares Common shares withheld to cover taxes at $9.88 per share

Tax-withholding price $9.88 per share Value used for 1,042-share tax-withholding disposition

Shares held after transactions 35,890 shares Direct Harmonic common stock holdings after April 15, 2026 transactions

Exercise transactions 1 transaction, 3,750 shares Derivative exercise/conversion activity summarized in transaction data

Tax-withholding transactions 1 transaction, 1,042 shares Tax-liability settlement by delivering shares

Key Terms

Restricted Stock Units, derivative exercise/conversion, tax-withholding disposition, derivative security, +1 more

5 terms

Restricted Stock Units financial

"security_title: "Restricted Stock Units""

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

derivative exercise/conversion financial

"transaction_action: "derivative exercise/conversion""

tax-withholding disposition financial

"transaction_action: "tax-withholding disposition""

A tax-withholding disposition is an event or transaction—such as selling or transferring securities, exercising options, or receiving compensation—that triggers a requirement to hold back part of the payment and remit it to tax authorities. It matters to investors because it reduces the cash they receive immediately and can change the timing and amount of taxable income, like a cashier taking a portion of your sale proceeds to pay taxes before you get the rest.

derivative security financial

"transaction_code_description: "Exercise or conversion of derivative security""

A derivative security is a financial contract whose value comes from the price or performance of something else, such as a stock, bond, commodity, or market index. For investors it acts like an insurance policy or a wager: it can be used to protect against losses, lock in prices, or amplify gains and losses, so it can change a portfolio’s risk and potential return without owning the underlying asset directly.

contingent right financial

"Each restricted stock unit represents a contingent right to receive one share"

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^*

Glahn Ronald J

(Last) (First) (Middle)

2590 ORCHARD PARKWAY

(Street)

SAN JOSE CALIFORNIA 95131

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	SVP, Global Sales, Broadband

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/15/2026

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

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

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

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	04/15/2026		M		3,750	A	$0	36,932	D
Common Stock	04/15/2026		F		1,042	D	$9.88	35,890	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	04/15/2026		M			3,750	04/15/2025	04/15/2027	Common Stock	3,750	$0	15,000	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	04/17/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did HLIT executive Ronald J. Glahn report on this Form 4?

Ronald J. Glahn reported exercising 3,750 restricted stock units into Harmonic Inc. common shares. This derivative exercise increased his direct equity position and reflects routine equity compensation rather than an open-market stock purchase or sale.

How many Harmonic (HLIT) shares were withheld for taxes in Glahn’s Form 4?

The filing shows 1,042 Harmonic common shares withheld at $9.88 per share for tax obligations. This disposition is labeled as a tax-withholding transaction, not an open-market sale, and typically occurs automatically when equity awards vest or are exercised.

How many Harmonic (HLIT) shares does Ronald J. Glahn hold after these transactions?

After exercising restricted stock units and related tax withholding, Ronald J. Glahn directly held 35,890 shares of Harmonic common stock. This figure reflects his updated ownership position following all reported transactions on April 15, 2026.

What does exercising 3,750 restricted stock units mean for HLIT’s Ronald J. Glahn?

Exercising 3,750 restricted stock units means Glahn converted compensation awards into 3,750 Harmonic common shares. Each unit represented a contingent right to one share, so the transaction increased his stock ownership through equity compensation rather than a cash purchase.

Was there an open-market sale of Harmonic (HLIT) shares in Ronald J. Glahn’s Form 4?

The Form 4 does not show an open-market sale. It shows an exercise of 3,750 restricted stock units and a disposition of 1,042 shares classified as tax withholding at $9.88 per share, which covers tax obligations rather than reflecting discretionary selling.