[Form 4] Penumbra Inc Insider Trading Activity

Rhea-AI Filing Summary

Penumbra Inc. (PEN) director Thomas C. Wilder reported a sale of 186 shares of common stock on 10/01/2025 at a price of $253.93 per share. The filing states the sale was executed under the reporting person’s Rule 10b5-1 trading plan. After the sale the report shows the reporting person beneficially owns 186 shares directly and 4,506 shares indirectly through the Thomas and Catharine Wilder Family Trust dated March 31, 2006. The filing also notes that a portion of the reported shares are subject to vesting.

The Form 4 was signed by an attorney-in-fact on behalf of Mr. Wilder on 10/03/2025. No options, derivative transactions, earnings figures, or other corporate actions are disclosed in this form; it records a single small open-market sale and the current direct and indirect holdings disclosed by the reporting person.

Positive

• Sale executed under a Rule 10b5-1 trading plan, indicating preplanned transaction and affirmative defense to insider trading concerns

Negative

• None.

Insights

Corporate Governance Expert

Small preplanned director sale under a Rule 10b5-1 plan; holdings remain primarily held in trust.

What it means: The director sold 186 shares on 10/01/2025 at $253.93 under a documented 10b5-1 trading plan, which indicates the transaction was preauthorized and designed to provide an affirmative defense to insider trading claims.

Why it matters: Because the sale was conducted under a 10b5-1 plan and the reporting person still retains 186 direct shares plus 4,506 indirect shares in a family trust, this filing signals routine monetization rather than an unplanned disposition tied to undisclosed company developments. The filing also discloses that some reported shares are subject to vesting, which affects the immediate liquidity of the reporting person's position.

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).

X

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^*

Wilder Thomas

(Last) (First) (Middle)

ONE PENUMBRA PLACE

(Street)

ALAMEDA CA 94502

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Penumbra Inc [ PEN ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
10/01/2025

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	10/01/2025		S(1)		186	D	$253.93	186(2)	D
Common Stock								4,506	I	By Trust(3)

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. The sales were effected pursuant to the Reporting Person's Rule 10b5-1 trading plan.

2. A portion of these shares is subject to vesting.

3. Shares are held by the Thomas and Catharine Wilder Family Trust dated March 31, 2006.

Remarks:

	/s/ Johanna Roberts, as attorney-in-fact for Thomas C. Wilder	10/03/2025
	** 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

What did Penumbra director Thomas C. Wilder sell in the Form 4 (PEN)?

The Form 4 reports a sale of 186 shares of Penumbra common stock on 10/01/2025 at $253.93 per share.

Was the sale by the Penumbra director part of a 10b5-1 trading plan?

Yes. The filing states the sales were effected pursuant to the reporting person’s Rule 10b5-1 trading plan.

How many Penumbra shares does Thomas C. Wilder beneficially own after the reported transaction?

The filing shows Mr. Wilder beneficially owns 186 shares directly and 4,506 shares indirectly via the family trust.

Are any of the reported shares subject to vesting?

Yes. The Form 4 states that a portion of the reported shares is subject to vesting.

Who holds the indirect shares disclosed by the reporting person?

The indirect holdings of 4,506 shares are held by the Thomas and Catharine Wilder Family Trust dated March 31, 2006.