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Sylebra Capital LLC (PI) reports 64,633-share open-market sale in IMPINJ

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4/A

Rhea-AI Filing Summary

IMPINJ Inc. director reporting entity Sylebra Capital LLC reported open-market sales of common stock held for its advisory clients. The filing shows three indirect sales totaling 64,633 shares on June 8–9, 2026 at prices between $125.9651 and $130.0685 per share.

After these transactions, 775,943 shares of IMPINJ common stock are reported as indirectly held. The securities are held by Sylebra-managed funds and other advisory clients, and Sylebra entities and their principal disclaim beneficial ownership except to the extent of any pecuniary interest.

Positive

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Negative

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Insider SYLEBRA CAPITAL LLC
Role null
Sold 64,633 shs ($8.30M)
Type Security Shares Price Value
Sale Common Stock 19,105 $127.3577 $2.43M
Sale Common Stock 12,528 $125.9651 $1.58M
Sale Common Stock 33,000 $130.0685 $4.29M
Holdings After Transaction: Common Stock — 775,943 shares (Indirect, See Footnote (1) (2))
Footnotes (1)
  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.
Total shares sold 64,633 shares Open-market sales of IMPINJ common stock over June 8–9, 2026
June 9, 2026 sale 19,105 shares at $127.3577/share Indirect open-market sale of IMPINJ common stock
June 8, 2026 sale 1 33,000 shares at $130.0685/share Indirect open-market sale of IMPINJ common stock
June 8, 2026 sale 2 12,528 shares at $125.9651/share Indirect open-market sale of IMPINJ common stock
Shares held after transactions 775,943 shares Indirect IMPINJ common stock position following June 9, 2026 sale
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"
advisory clients financial
"other advisory clients"
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"
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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/08/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)
06/10/2026
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)
CodeVAmount(A) or (D)Price
Common Stock06/08/202606/09/2026S12,528D$125.9651828,048ISee Footnote (1) (2)(1)(2)
Common Stock06/08/202606/09/2026S33,000D$130.0685795,048ISee Footnote (1) (2)(1)(2)
Common Stock06/09/202606/10/2026S19,105D$127.3577775,943ISee 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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
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 Whitehead06/10/2026
** Signature of Reporting PersonDate
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 Sylebra Capital LLC report for IMPINJ (PI)?

Sylebra Capital LLC reported indirect open-market sales of IMPINJ common stock held for advisory clients, totaling 64,633 shares. These sales occurred over two days in June 2026 and reduced the clients’ reported indirect holdings to 775,943 shares after the final transaction.

How many IMPINJ (PI) shares were sold and at what prices?

The transactions total 64,633 IMPINJ common shares sold. Reported trade sizes were 33,000, 12,528, and 19,105 shares at per-share prices of $130.0685, $125.9651, and $127.3577, respectively, reflecting open-market sale prices over June 8–9, 2026.

How many IMPINJ (PI) shares remain indirectly held after these sales?

After the June 9, 2026 sale, the filing states 775,943 IMPINJ common shares are indirectly held. These securities are held by Sylebra-managed funds and other advisory clients, with Sylebra entities and their principal disclaiming beneficial ownership except for any pecuniary interest.

Who actually holds the IMPINJ (PI) shares involved in the Sylebra filing?

The securities are held by Sylebra Capital Partners Master Fund, Sylebra Capital Menlo Master Fund, and other advisory clients. Sylebra Capital LLC and related Sylebra entities act as investment managers or sub-advisers and may share voting and dispositive power but disclaim full beneficial ownership.

Does the Sylebra IMPINJ (PI) Form 4/A indicate direct or indirect ownership?

All reported transactions are classified as indirect ownership. The shares belong to funds and advisory clients for which Sylebra entities serve as investment manager or sub-adviser, and the filing notes that beneficial ownership is disclaimed except to the extent of any pecuniary interest in the securities.