What did Sylebra-related entities do in this Impinj (PI) Form 4 filing?

Sylebra-affiliated advisory clients sold Impinj common stock in an open-market trade. They disposed of 33,412 shares and continued to hold 888,055 shares indirectly after the transaction, with Sylebra entities disclaiming beneficial ownership except for any pecuniary interest.

Sylebra funds trim 33,412 Impinj (PI) shares in open-market sale

Filing Impact

(Very High)

Filing Sentiment

(Negative)

Form Type

Rhea-AI Filing Summary

Sylebra-affiliated investment funds sold Impinj common stock in the open market. On this Form 4, entities advised by Sylebra Capital LLC and Sylebra Capital Limited disposed of 33,412 shares of Impinj, Inc. common stock at an average price of $136.8435 per share.

After this transaction, the advisory clients, including Sylebra Capital Partners Master Fund and Sylebra Capital Menlo Master Fund, held 888,055 Impinj shares indirectly. Sylebra and related entities disclaim beneficial ownership of these securities except to the extent of any pecuniary interest.

Insider Trade Summary

Net Seller: 33,412 shares ($4,572,215)

Net Sell 1 txn

Insider SYLEBRA CAPITAL LLC

Role null

Sold 33,412 shs ($4.57M)

Type	Security	Shares	Price	Value
Sale	Common Stock	33,412	$136.8435	$4.57M

Holdings After Transaction: Common Stock — 888,055 shares (Indirect, See Footnote (1) (2))

Footnotes (1)

(1) Sylebra Capital LLC (Sylebra US) and Sylebra Capital Limited (Sylebra HK) are the investment sub-advisers to Sylebra Capital Partners Master Fund, Ltd. (SCPMF), 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 more than 100% of the 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 US, Sylebra HK, 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 other advisory clients. Gibson is a member of the board of directors of the Issuer. Sylebra US, Sylebra HK, Sylebra Cayman and Gibson disclaim beneficial ownership of these securities, and this report shall not be deemed an admission that Sylebra US, Sylebra HK, Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

Key Figures

Shares sold: 33,412 shares Sale price per share: $136.8435/share Shares held after transaction: 888,055 shares

3 metrics

Shares sold 33,412 shares Open-market sale of Impinj common stock

Sale price per share $136.8435/share Average price for the 33,412 shares sold

Shares held after transaction 888,055 shares Indirect holdings by advisory clients after sale

Key Terms

open-market sale, beneficial ownership, investment sub-advisers, pecuniary interest

4 terms

open-market sale financial

"transaction_action: "open-market sale""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

beneficial ownership financial

"disclaim beneficial ownership of these securities"

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.

investment sub-advisers financial

"are the investment sub-advisers to Sylebra Capital Partners Master Fund"

pecuniary interest financial

"except to the extent of their pecuniary interest, if any, therein"

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Form 4 Insider Transactions: What Each Field Means →

06/08/2026 - 05:01 PM

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)
06/04/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	06/04/2026	06/05/2026	S		33,412	D	$136.8435	888,055	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. (1) Sylebra Capital LLC (Sylebra US) and Sylebra Capital Limited (Sylebra HK) are the investment sub-advisers to Sylebra Capital Partners Master Fund, Ltd. (SCPMF), 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 more than 100% of the 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 US, Sylebra HK, 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. (2) These securities are held by SCP MF, MENLO MF, and other advisory clients. Gibson is a member of the board of directors of the Issuer. Sylebra US, Sylebra HK, Sylebra Cayman and Gibson disclaim beneficial ownership of these securities, and this report shall not be deemed an admission that Sylebra US, Sylebra HK, Sylebra Cayman and Gibson are the beneficial owners of such securities, except to the extent of their pecuniary interest, if any, therein.

	Matthew Whitehead	06/08/2026
	** 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)

Source: View Original Filing on SEC EDGAR

FAQ

How many Impinj (PI) shares were sold in this Sylebra transaction?

Advisory clients associated with Sylebra Capital LLC sold 33,412 Impinj common shares. The sale was reported as an open-market transaction at an average price of $136.8435 per share, and the filing shows remaining indirect holdings of 888,055 shares after the sale.

At what price were the Impinj (PI) shares sold in this Form 4?

The reported sale of Impinj common stock was executed at an average price of $136.8435 per share. This price applies to the 33,412 shares disposed of in the open-market transaction disclosed in the filing by Sylebra-affiliated advisory clients.

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

Following the reported sale, Sylebra-affiliated advisory clients held 888,055 Impinj common shares indirectly. This figure reflects the position after disposing of 33,412 shares in the open market, as shown in the Form 4 transaction details.

Who is considered to hold the Impinj (PI) shares reported in this Form 4?

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

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

No. Sylebra Capital LLC, related entities, and Daniel Patrick Gibson expressly disclaim beneficial ownership of the Impinj shares. They state that any beneficial ownership exists only to the extent of their pecuniary interest, if any, in the advisory clients’ holdings.