[Form 4] Enphase Energy, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Enphase Energy VP and Chief Accounting Officer Mary Erginsoy reported multiple tax-withholding dispositions of common stock on March 1, 2026. A total of 8,642 shares at $42.27 per share were withheld by the company to cover tax obligations on vested RSUs and performance stock units. After these transactions, she held 30,537 shares directly and 9,669 shares indirectly through the Erginsoy Family Trust, where she serves as trustee.

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

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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^*

Erginsoy Mary

(Last) (First) (Middle)

47281 BAYSIDE PARKWAY

(Street)

FREMONT CA 94538

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Enphase Energy, Inc. [ ENPH ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	VP, Chief Accounting Officer

3. Date of Earliest Transaction (Month/Day/Year)
03/01/2026

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	03/01/2026		F		464(1)	D	$42.27	38,715	D
Common Stock	03/01/2026		F		989(2)	D	$42.27	37,726	D
Common Stock	03/01/2026		F		1,791(3)	D	$42.27	35,935	D
Common Stock	03/01/2026		F		5,398(4)	D	$42.27	30,537	D
Common Stock								9,669	I	By Trust(5)

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

Explanation of Responses:

1. Represents shares withheld by the Issuer to satisfy the tax withholding obligation associated with the vesting of RSUs granted to the Reporting Person on March 8, 2023.

2. Represents shares withheld by the Issuer to satisfy the tax withholding obligation associated with the vesting of RSUs granted to the Reporting Person on January 15, 2024.

3. Represents shares withheld by the Issuer to satisfy the tax withholding obligation associated with the vesting of RSUs granted to the Reporting Person on January 14, 2025.

4. Represents shares withheld by the Issuer to satisfy the tax withholding obligation associated with the vesting of performance stock units granted to the Reporting Person on January 14, 2025.

5. Shares are held in the Erginsoy Family Trust, in which the Reporting Person is a trustee.

Remarks:

	Lisan Hung, Attorney-in-Fact for Mary Erginsoy	03/03/2026
	** 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.
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FAQ

What insider transaction did Enphase Energy (ENPH) report for Mary Erginsoy?

Enphase Energy reported that VP and Chief Accounting Officer Mary Erginsoy had company shares withheld to cover tax obligations on vested RSUs and performance stock units, rather than executing an open-market sale, as part of routine equity compensation settlement.

How many Enphase Energy shares were withheld for Mary Erginsoy’s taxes?

A total of 8,642 Enphase Energy common shares were withheld at $42.27 per share. These withholdings satisfied tax liabilities tied to vesting restricted stock units and performance stock units granted between March 2023 and January 2025 under her compensation arrangements.

What is Mary Erginsoy’s Enphase Energy shareholding after these Form 4 transactions?

Following the tax-withholding transactions, Mary Erginsoy directly owned 30,537 Enphase Energy common shares. In addition, 9,669 shares were held indirectly through the Erginsoy Family Trust, where she serves as a trustee, reflecting both her direct and trust-related equity exposure.

Were Mary Erginsoy’s Enphase Energy transactions open-market sales?

No, the transactions were coded as “F,” indicating shares were withheld by Enphase Energy to pay taxes. The filing describes them as payment of tax liabilities using stock from vested RSUs and performance stock units, not discretionary open-market selling activity by the executive.

Which equity awards triggered the Enphase Energy share withholdings for Mary Erginsoy?

The share withholdings related to RSUs granted on March 8, 2023, January 15, 2024, and January 14, 2025, plus performance stock units granted on January 14, 2025. As these awards vested, Enphase Energy withheld shares to cover associated tax obligations.

How are some of Mary Erginsoy’s Enphase Energy shares held indirectly?

A portion of Mary Erginsoy’s Enphase Energy holdings is in the Erginsoy Family Trust. The filing states these shares are held in the trust, where she is a trustee, indicating indirect ownership separate from her directly held common stock position at the company.