Impinj (PI) director-linked Sylebra funds disclose December 2025 share sales

Rhea-AI Filing Summary

Impinj Inc director-linked investment entities reported three dispositions of common stock in December 2025. Transactions on 12/11, 12/12 and 12/15/2025 covered 95,345, 50,573 and 134,629 shares, respectively, at prices of $152.87, $146.62 and $150.36.

After the 12/15/2025 transaction, 1,132,152 shares were reported as beneficially owned indirectly. The filing explains that Sylebra Capital entities act as advisers or manager to the funds holding the shares, and together with director Daniel Patrick Gibson they may be deemed to share voting and dispositive power but disclaim beneficial ownership except to 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

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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)
12/11/2025

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	12/11/2025		S		95,345	D	$152.87	1,317,354	I	See Footnote(1)(2)
Common Stock	12/12/2025		S		50,573	D	$146.62	1,266,781	I	See Footnote(1)(2)
Common Stock	12/15/2025		S		134,629	D	$150.36	1,132,152	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 maybe 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	12/15/2025
	** 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).
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FAQ

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

The filing reports three dispositions of Impinj common stock: 95,345 shares on 12/11/2025 at $152.87, 50,573 shares on 12/12/2025 at $146.62, and 134,629 shares on 12/15/2025 at $150.36.

How many Impinj (PI) shares were beneficially owned after the reported transactions?

Following the 12/15/2025 transaction, the reporting persons list 1,132,152 shares of Impinj common stock as beneficially owned indirectly.

Who are the reporting persons or related parties in the Impinj (PI) Form 4?

The explanation describes Sylebra Capital Limited, Sylebra Capital LLC, and Sylebra Capital Management as advisers or manager to certain funds, with Daniel Patrick Gibson as founder, Chief Investment Officer of Sylebra Cayman and a member of Impinjs board of directors.

How are the reported Impinj (PI) securities held according to the filing?

The securities are held by Sylebra Capital Partners Master Fund, Ltd., Sylebra Capital Menlo Master Fund, and/or other advisory clients of the Sylebra entities.

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

No. The filing states that Sylebra Capital entities and Daniel Patrick Gibson disclaim beneficial ownership of the securities, except to the extent of any pecuniary interest.