How many IMPINJ INC (PI) shares remain held after the Sylebra-related sales?

After the reported transactions, the Form 4 shows indirect holdings of 876,453 Impinj common shares associated with Sylebra-advised funds and advisory clients, indicating that a substantial position remains following the 47,479 shares sold on 2026-06-05.

Sylebra-advised funds trim Impinj (PI) stake with 47K-share open sale

Filing Impact

(Very High)

Filing Sentiment

(Very Negative)

Form Type

Rhea-AI Filing Summary

IMPINJ INC director‑affiliated funds reported selling common stock. On 2026-06-05, entities advised by SYLEBRA CAPITAL LLC executed two open-market sales totaling 47,479 shares of Impinj common stock, at weighted prices of about $122.50 and $128.87 per share.

After these trades, the filing shows indirect holdings of 876,453 shares. The shares are held by Sylebra-managed funds and other advisory clients, and Sylebra entities and director Daniel Patrick Gibson disclaim beneficial ownership except to the extent of any pecuniary interest.

Insider Trade Summary

Net Seller: 47,479 shares ($5,890,074)

Net Sell 2 txns

Insider SYLEBRA CAPITAL LLC

Role null

Sold 47,479 shs ($5.89M)

Type	Security	Shares	Price	Value
Sale	Common Stock	11,602	$128.8684	$1.50M
Sale	Common Stock	35,877	$122.5003	$4.39M

Holdings After Transaction: Common Stock — 876,453 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

First block sold: 35,877 shares at $122.5003 Second block sold: 11,602 shares at $128.8684 Total shares sold: 47,479 shares +1 more

4 metrics

First block sold 35,877 shares at $122.5003 Open-market sale of Impinj common stock on 2026-06-05

Second block sold 11,602 shares at $128.8684 Open-market sale of Impinj common stock on 2026-06-05

Total shares sold 47,479 shares Net shares sold by Sylebra-advised entities per Form 4 summary

Indirect holdings after trades 876,453 shares Impinj common stock indirectly held after 2026-06-05 sales

Key Terms

open-market sale, indirect ownership, beneficial ownership, investment sub-advisers, +1 more

5 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.

indirect ownership financial

"direct_or_indirect: I, ownership_type: indirect"

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

"Sylebra Capital LLC and Sylebra Capital Limited are the investment sub-advisers"

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 →

06/09/2026 - 06:29 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)
06/05/2026

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	06/05/2026	06/08/2026	S		11,602	D	$128.8684	876,453	I	See Footnote (1) (2)⁽¹⁾⁽²⁾
Common Stock	06/05/2026	06/08/2026	S		35,877	D	$122.5003	840,576	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	06/09/2026
	** 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 activity did IMPINJ INC (PI) report in this Form 4?

The Form 4 reports that entities advised by SYLEBRA CAPITAL LLC sold 47,479 shares of Impinj common stock in open-market transactions on 2026-06-05, while continuing to hold a large remaining indirect position afterward.

How many IMPINJ INC (PI) shares did Sylebra-advised entities sell and at what prices?

Sylebra-advised entities sold 35,877 Impinj shares at a weighted price of about $122.5003 and 11,602 shares at about $128.8684 on 2026-06-05, for a total of 47,479 shares sold in open-market trades.

Who actually holds the IMPINJ INC (PI) shares reported in this Form 4?

The securities are held by Sylebra Capital Partners Master Fund, Ltd., Sylebra Capital Menlo Master Fund, and other advisory clients. Sylebra entities and director Daniel Patrick Gibson act as advisers and managers and disclaim beneficial ownership except for any pecuniary interest.

Does SYLEBRA CAPITAL LLC or Daniel Patrick Gibson claim beneficial ownership of the IMPINJ INC shares?

The filing states that Sylebra Capital LLC, related Sylebra entities, and director Daniel Patrick Gibson disclaim beneficial ownership of the Impinj securities, except to the extent of their pecuniary interest, if any, in the shares held by the advised funds and other clients.