How many Impinj (PI) shares were sold on May 29 by Sylebra-related entities?

On May 29, advisory clients associated with Sylebra entities sold 48,504 Impinj shares in open-market transactions at an average price of $150.7755 per share. These transactions reduced, but did not eliminate, their overall indirect position in the company.

What was the June 1 Impinj (PI) share sale reported by Sylebra Capital?

On June 1, advisory clients linked to Sylebra entities sold 7,163 shares of Impinj common stock. The average sale price was $144.2911 per share in open-market transactions, as disclosed in the Form 4 filing.

How many Impinj (PI) shares remain held after Sylebra-related sales?

After the reported transactions, advisory clients associated with Sylebra entities collectively held 966,504 Impinj shares indirectly. This figure reflects their remaining position following the combined sale of 55,667 shares across the two trading dates.

Sylebra Capital (NASDAQ: PI) funds sell 55,667 Impinj shares but retain 966,504

Q: Who actually holds the Impinj (PI) shares linked to Sylebra Capital’s Form 4?

The shares are held by Sylebra Capital Partners Master Fund, Ltd. , 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.

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

Sylebra Capital LLC, as a reporting person associated with various investment entities, reported open-market sales of Impinj common stock held for advisory clients. On May 29, entities linked to Sylebra sold 48,504 shares at an average price of $150.7755 per share. On June 1, they sold an additional 7,163 shares at an average price of $144.2911. Following these transactions, the advisory clients collectively held 966,504 shares of Impinj common stock indirectly. The footnotes state that the shares are held by Sylebra Capital Partners Master Fund, Ltd., Sylebra Capital Menlo Master Fund, and other advisory clients, and that Sylebra entities and Daniel Patrick Gibson disclaim beneficial ownership except to the extent of any pecuniary interest.

Insider Trade Summary

Net Seller: 55,667 shares ($8,346,772)

Net Sell 2 txns

Insider SYLEBRA CAPITAL LLC

Role null

Sold 55,667 shs ($8.35M)

Type	Security	Shares	Price	Value
Sale	Common Stock	7,163	$144.2911	$1.03M
Sale	Common Stock	48,504	$150.7755	$7.31M

Holdings After Transaction: Common Stock — 966,504 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

Total shares sold: 55,667 shares Shares sold on May 29: 48,504 shares Average price on May 29: $150.7755 per share +3 more

6 metrics

Total shares sold 55,667 shares Net open-market sales reported in this Form 4

Shares sold on May 29 48,504 shares Open-market sale of Impinj common stock

Average price on May 29 $150.7755 per share Sale price for 48,504 Impinj shares

Shares sold on June 1 7,163 shares Open-market sale of Impinj common stock

Average price on June 1 $144.2911 per share Sale price for 7,163 Impinj shares

Shares held after transactions 966,504 shares Indirect holdings by advisory clients after sales

Key Terms

open-market sale, beneficial ownership, pecuniary interest, voting and dispositive power

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.

pecuniary interest financial

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

voting and dispositive power financial

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

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Form 4 Insider Transactions: What Each Field Means →

06/02/2026 - 06:02 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)
05/29/2026

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	05/29/2026	06/01/2026	S		48,504	D	$150.7755	973,667	I	See Footnote (1) (2)⁽¹⁾⁽²⁾
Common Stock	06/01/2026	06/02/2026	S		7,163	D	$144.2911	966,504	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	06/02/2026
	** 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

What insider transactions did Sylebra Capital report for Impinj (PI)?

Sylebra Capital reported two open-market sales of Impinj common stock by advisory clients, totaling 55,667 shares. One trade occurred on May 29 and another on June 1, both at prices above $144 per share.

Who actually holds the Impinj (PI) shares linked to Sylebra Capital’s Form 4?

The shares are held by Sylebra Capital Partners Master Fund, Ltd., 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.

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

No. The filing states that Sylebra US, Sylebra HK, Sylebra Cayman, and Daniel Patrick Gibson disclaim beneficial ownership of the Impinj securities, except to the extent of their pecuniary interest, if any, in those advisory client holdings.