Impinj (PI) director-affiliated Sylebra funds report multi-day stock sales

Rhea-AI Filing Summary

Impinj, Inc. director-affiliated investment entities reported open-market sales of the company’s common stock. On 12/03/2025, they sold 41,221 shares at $167.97 per share. Additional sales included 3,167 shares at $160.59 on 12/04/2025 and 1,373 shares at $161.04 on 12/05/2025. After these transactions, 1,499,837 shares of Impinj common stock were reported as beneficially owned indirectly. The filing explains that the shares are held by Sylebra-managed funds and advisory clients, and the Sylebra entities and Daniel Patrick Gibson, a director of Impinj, may be deemed to share voting and dispositive power but disclaim beneficial ownership except for any pecuniary interest.

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

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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^*

SYLEBRA CAPITAL LLC

(Last) (First) (Middle)

3000 EL CAMINO REAL BUILDING 5 SUITE 450

(Street)

PALO ALTO CA 94306

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
IMPINJ INC [ PI ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
12/03/2025

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

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

	Form filed by One Reporting Person
X	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	12/03/2025		S		41,221	D	$167.97	1,504,377	I	See Footnote(1)(2)
Common Stock	12/04/2025		S		3,167	D	$160.59	1,501,210	I	See Footnote(1)(2)
Common Stock	12/05/2025		S		1,373	D	$161.04	1,499,837	I	See Footnote(1)(2)

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

1. Name and Address of Reporting Person^*

SYLEBRA CAPITAL LLC

(Last) (First) (Middle)

3000 EL CAMINO REAL BUILDING 5 SUITE 450

(Street)

PALO ALTO CA 94306

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

1. Name and Address of Reporting Person^*

Gibson Daniel Patrick

(Last) (First) (Middle)

400 FAIRVIEW AVENUE NORTH, SUITE 1200

(Street)

SEATTLE WA 98109

(City) (State) (Zip)

Relationship of Reporting Person(s) to Issuer

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

Explanation of Responses:

1. Sylebra Capital Limited (Sylebra HK) and Sylebra Capital LLC (Sylebra US) are the investment sub-advisers to Sylebra Capital Partners Master Fund, Ltd. (SCP MF),Sylebra Capital Menlo Master Fund (MENLO MF)and other advisory clients. Sylebra Capital Management (Sylebra Cayman) is the investment manager and parent of Sylebra HK.Sylebra Cayman owns 100% of the shares of Sylebra HK, and Daniel Patrick Gibson (Gibson) owns 100% of Class A shares of Sylebra Cayman and 100% of the share capital of Sylebra US. Gibson is a founder and Chief Investment Officer of Sylebra Cayman. In such capacities, Sylebra HK, Sylebra US, Sylebra Cayman and Gibson may be deemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, MENLO MF, and other advisory clients.

2. These securities are held by SCP MF, MENLO MF, and/or other advisory clients. Gibson is a member of the board of directors of the Issuer. Sylebra HK, Sylebra US, Sylebra Cayman and Gibson disclaim beneficial ownership of these securities, and this report shall not be deemed an admission that Sylebra HK, Sylebra US,Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

	Matthew Whitehead, CCO, Authorsied Signatory	12/05/2025
	** 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.
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FAQ

What insider transactions did Impinj (PI) report in this Form 4?

The filing reports that director-affiliated investment entities sold 41,221 Impinj common shares on 12/03/2025, 3,167 shares on 12/04/2025, and 1,373 shares on 12/05/2025 in open-market sales.

At what prices were the Impinj (PI) shares sold in the reported trades?

The reported sales were executed at prices of $167.97 per share on 12/03/2025, $160.59 per share on 12/04/2025, and $161.04 per share on 12/05/2025.

How many Impinj (PI) shares were beneficially owned after these insider sales?

Following the reported transactions, the reporting persons indicated they beneficially owned 1,499,837 Impinj common shares indirectly.

Who are the reporting persons in this Impinj (PI) Form 4 filing?

The explanation identifies Sylebra Capital Limited (Sylebra HK), Sylebra Capital LLC (Sylebra US), Sylebra Capital Management (Sylebra Cayman), Sylebra Capital Partners Master Fund, Ltd. (SCP MF), Sylebra Capital Menlo Master Fund (MENLO MF), other advisory clients, and Daniel Patrick Gibson, who is a director of Impinj.

How are the Impinj (PI) shares held and managed according to the filing?

The filing states that the securities are held by SCP MF, MENLO MF, and other advisory clients. Sylebra HK and Sylebra US act as investment sub-advisers, and Sylebra Cayman is the investment manager and parent of Sylebra HK.

Do the Sylebra entities and Daniel Patrick Gibson claim full beneficial ownership of the Impinj (PI) shares?

No. The filing explains that Sylebra HK, Sylebra US, Sylebra Cayman, and Daniel Patrick Gibson may be deemed to share voting and dispositive power over the shares but disclaim beneficial ownership, except to the extent of any pecuniary interest.

What is Daniel Patrick Gibson’s role at Impinj (PI)?

The explanation notes that Daniel Patrick Gibson is a member of the board of directors of Impinj and is also a founder and Chief Investment Officer of Sylebra Cayman.