Sylebra funds sell 36,171 Impinj shares at $152.73

Sylebra-related investment funds completed an open-market sale of Impinj common stock.

Rhea-AI Filing Summary

Sylebra-related investment funds completed an open-market sale of Impinj common stock. On this Form 4, Sylebra Capital LLC, a director of Impinj, reported that advisory clients, including Sylebra Capital Partners Master Fund and Sylebra Capital Menlo Master Fund, sold 36,171 shares of Impinj common stock at an average price of $152.73 per share on May 7, 2026. After this transaction, these advisory clients collectively held 1,132,152 Impinj shares indirectly reported by Sylebra. The filing notes that Sylebra entities and Daniel Gibson, who serves on Impinj’s board, may be deemed to share voting and dispositive power over these shares but disclaim beneficial ownership except to the extent of any pecuniary interest.

Insider Trade Summary

Net Seller: 36,171 shares

Net Sell 1 txn

Insider SYLEBRA CAPITAL LLC

Role Director

Sold 36,171 shs ($5.52M)

Type	Security	Shares	Price	Value
Sale	Common Stock	36,171	$152.73	$5.52M

Holdings After Transaction: Common Stock — 1,132,152 shares (Indirect, See Footnote (1)&(2))

Footnotes (2)

1. F1. (1) Sylebra Capital Limited (Sylebra HK) is the investment sub-adviser to Sylebra Capital Partners Master Fund, Ltd. (SCPMF), Sylebra Capital Parc Master Fund (PARC 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. Daniel Gibson (Mr. Gibson) owns more than 99% of the shares of Sylebra Cayman. In such capacities, Sylebra HK, Sylebra Cayman and Mr. Gibson may be deemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, PARC MF, MENLO MF, and other advisory clients.
2. F2. (2) These securities are held by SCP MF, MENLO MF, and other advisory clients. Mr. Gibson is a member of the board of directors of the Issuer. Sylebra HK, Sylebra US, Sylebra Cayman and Mr. Gibson disclaim beneficial ownership of these securities, and this report shall not be deemed an admission that Sylebra HK, Sylebra US, Sylebra Cayman and Mr. Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

Key Figures

Shares sold: 36,171 shares Sale price per share: $152.73 per share Shares held after transaction: 1,132,152 shares +1 more

4 metrics

Shares sold 36,171 shares Open-market sale of Impinj common stock on May 7, 2026

Sale price per share $152.73 per share Average price for the 36,171 Impinj shares sold

Shares held after transaction 1,132,152 shares Indirect holdings by advisory clients after the sale

Sell transactions 1 transaction Single reported open-market sale in this Form 4

Key Terms

investment sub-adviser, investment manager, voting and dispositive power, beneficial ownership, +1 more

5 terms

investment sub-adviser financial

"Sylebra Capital Limited (Sylebra HK) is the investment sub-adviser to Sylebra Capital Partners Master Fund"

An investment sub-adviser is a firm or individual hired by a fund or its primary investment adviser to manage some or all of an investment portfolio, making day-to-day buying, selling and strategy decisions on the fund’s behalf. Like a specialist subcontractor brought in for a specific job, a sub-adviser can provide expertise in a sector, region or strategy, and its work can influence a fund’s performance, risk profile and fees—information investors watch when evaluating a fund.

investment manager financial

"Sylebra Capital Management (Sylebra Cayman) is the investment manager and parent of Sylebra HK"

voting and dispositive power financial

"may be deemed to share voting and dispositive power over the shares of common stock"

beneficial ownership financial

"disclaim beneficial ownership of these securities, and this report shall not be deemed an admission"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

pecuniary interest financial

"beneficial owners of such securities, except to the extent of their pecuniary interest"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did Sylebra-related funds report in this Impinj (PI) Form 4?

The Form 4 reports that advisory clients of Sylebra-related entities sold 36,171 shares of Impinj common stock at $152.73 per share. These shares are held by funds such as Sylebra Capital Partners Master Fund and Sylebra Capital Menlo Master Fund and other advisory clients.

How many Impinj (PI) shares remain held after the reported Sylebra sale?

After the 36,171-share sale, advisory clients associated with Sylebra-related entities collectively held 1,132,152 Impinj common shares. This total reflects indirect holdings reported by Sylebra Capital LLC on the Form 4 as of the transaction date of May 7, 2026.

Was the Impinj (PI) transaction an open-market sale or another type?

The transaction was an open-market sale of Impinj common stock. The Form 4 classifies it under transaction code “S,” described as a sale in an open market or private transaction, at an average price of $152.73 per share for 36,171 shares.

Who actually holds the Impinj (PI) shares linked to Sylebra Capital LLC?

The shares are held by Sylebra Capital Partners Master Fund, Sylebra Capital Menlo Master Fund, and other advisory clients. Sylebra Capital Limited and Sylebra Capital Management entities may share voting and dispositive power but disclaim beneficial ownership except for any pecuniary interest.

Does Sylebra Capital LLC claim full beneficial ownership of these Impinj (PI) shares?

No. The filing states Sylebra Capital Limited, Sylebra Capital Management, Sylebra US, and Daniel Gibson disclaim beneficial ownership of the Impinj shares. They only acknowledge potential beneficial ownership to the extent of any pecuniary interest in the advisory client accounts.

What is Daniel Gibson’s role in relation to Impinj (PI) and Sylebra entities?

Daniel Gibson owns more than 99% of Sylebra Capital Management and serves on Impinj’s board of directors. Through his role and Sylebra entities, he may be deemed to share voting and dispositive power over Impinj shares held by the advisory client funds.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 05/11/2026 - 03:11 PM Learn about SEC filing dates

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).

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 CALIFORNIA 94306

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/07/2026

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

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	05/07/2026	05/08/2026	S		36,171	D	$152.73	1,132,152	I	See Footnote (1)&(2)(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

Explanation of Responses:

1. (1) Sylebra Capital Limited (Sylebra HK) is the investment sub-adviser to Sylebra Capital Partners Master Fund, Ltd. (SCPMF), Sylebra Capital Parc Master Fund (PARC 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. Daniel Gibson (Mr. Gibson) owns more than 99% of the shares of Sylebra Cayman. In such capacities, Sylebra HK, Sylebra Cayman and Mr. Gibson may be deemed to share voting and dispositive power over the shares of common stock of the Issuer held by SCP MF, PARC MF, MENLO MF, and other advisory clients.

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

	Matthew Whitehead	05/11/2026
	** 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.
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.
* Form 4: SEC 1474 (03-26)