[Form 4] Penumbra, Inc. Insider Trading Activity

Rhea-AI Filing Summary

iRhythm Technologies, Inc. (IRTC) – Form 4 Insider Transaction

On 23 June 2025, Chief Commercial Officer Chad Patterson sold 936 shares of IRTC common stock at $150.00 per share, generating gross proceeds of roughly $140,400. The sale was made pursuant to a Rule 10b5-1 trading plan that Patterson adopted on 25 November 2024, indicating the transaction was pre-scheduled and not necessarily the result of contemporaneous market sentiment.

After the sale, Patterson retains 48,929 shares, keeping a substantial equity stake in the company. No derivative securities were exercised or disposed, and there were no additional transactions disclosed in Table II.

• The sale represents approximately 1.9 % of Patterson’s reported holdings, suggesting a modest portfolio rebalancing rather than a major reduction.
• Use of a 10b5-1 plan enhances transparency and mitigates concerns about opportunistic trading.

Positive

• Sale executed under Rule 10b5-1, enhancing transparency and reducing concerns about timing.
• Officer retains 48,929 shares, indicating continued confidence and alignment with shareholders.

Negative

• Any insider sale can be perceived negatively by the market, even if modest in size.

Insights

Securities Analyst

TL;DR: Routine 936-share sale (~$140k) under 10b5-1 plan; minimal impact on insider’s 48.9k-share stake.

The filing shows a small, pre-planned disposition by the Chief Commercial Officer. At roughly 2 % of his holdings, the sale is unlikely to signal strategic unease. Continued ownership of nearly 49 k shares maintains alignment with shareholders. The 10b5-1 framework further reduces the interpretive risk typically associated with insider selling. Overall impact on valuation or sentiment should be neutral barring other catalysts.

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^*

Roberts Johanna

(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)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Gen. Counsel & Secretary

3. Date of Earliest Transaction (Month/Day/Year)
07/01/2025

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	07/01/2025		S(1)		8	D	$247.61(2)	66,649(3)	D
Common Stock	07/01/2025		S(1)		2	D	$249.27(4)	66,647(3)	D
Common Stock	07/01/2025		S(1)		7	D	$249.91(5)	66,640(3)	D
Common Stock	07/01/2025		S(1)		81	D	$251.16(6)	66,559(3)	D
Common Stock	07/01/2025		S(1)		270	D	$251.84(7)	66,289(3)	D
Common Stock	07/01/2025		S(1)		46	D	$252.87(8)	66,243(3)	D
Common Stock	07/01/2025		S(1)		31	D	$253.84(9)	66,212(3)	D
Common Stock	07/01/2025		S(1)		93	D	$254.8(10)	66,119(3)	D
Common Stock	07/01/2025		S(1)		62	D	$255.72(11)	66,057(3)	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

Explanation of Responses:

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

2. This transaction was executed in multiple trades at prices ranging from $247.37 to $248.05. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

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

4. This transaction was executed in multiple trades at prices ranging from $249.24 to $249.29. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

5. This transaction was executed in multiple trades at prices ranging from $249.54 to $250.36. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

6. This transaction was executed in multiple trades at prices ranging from $250.61 to $251.33. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

7. This transaction was executed in multiple trades at prices ranging from $251.38 to $252.35. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

8. This transaction was executed in multiple trades at prices ranging from $252.43 to $253.36. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

9. This transaction was executed in multiple trades at prices ranging from $253.40 to $254.28. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

10. This transaction was executed in multiple trades at prices ranging from $254.37 to $255.36. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

11. This transaction was executed in multiple trades at prices ranging from $255.37 to $256.08. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide to the SEC staff, the Issuer or a security holder of the Issuer, upon request, full information regarding the number of shares and prices at which the transaction was effected.

Remarks:

	/s/ Johanna Roberts	07/03/2025
	** 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

How many IRTC shares did Chad Patterson sell?

He sold 936 shares on 23 June 2025.

At what price were the IRTC shares sold?

The shares were sold at $150.00 per share.

How many IRTC shares does Patterson own after the sale?

He beneficially owns 48,929 shares following the transaction.

Was the sale part of a Rule 10b5-1 trading plan?

Yes. The transaction was executed under a Rule 10b5-1 plan adopted on 25 Nov 2024.

Does this insider sale materially impact iRhythm Technologies?

Given the small size (≈1.9 % of holdings) and pre-planned nature, the filing is considered neutral in impact.