Gibson Daniel Patrick 4

4 · IMPINJ INC · Filed May 29, 2026

AI-generated summary of this filing

Updated May 29, 2026

Impinj Director Daniel Gibson Receives 1,896 Shares After RSU Vest

What Happened

Daniel Patrick Gibson, a director of Impinj (PI), had 3,114 restricted stock units (RSUs) convert/vest on May 28, 2026 (reported on Form 4). The filing shows a conversion/exercise event for 3,114 RSU-derived shares and a simultaneous disposition of 3,114 shares (derivative), with a grant/award entry showing 1,896 shares acquired. In effect, 3,114 RSUs vested and 1,896 shares were issued to Gibson while 1,218 shares were withheld/disposed (commonly to satisfy tax withholding).

Key Details

Transaction date: May 28, 2026; Form 4 filed May 29, 2026 (timely).
Reported entries: M (exercise/conversion of derivative) 3,114 shares @ $0.00; M (disposition of derivative) 3,114 shares @ $0.00; A (award/grant) 1,896 shares @ $0.00.
Net shares received by Gibson: 1,896; shares withheld/retired: 1,218 (3,114 − 1,896).
Footnotes: The 3,114 RSUs were granted June 5, 2025 and vested May 28, 2026 (F3). A separate RSU grant referenced will fully vest May 28, 2027 (F4). F1 notes Gibson’s ownership/roles in Sylebra entities that may give him shared voting/dispositive power over certain institutional holdings; this relates to institutional positions, not an executive open-market trade.
Shares owned after the transaction: not specified in the provided filing details.

Context

This was a vesting/net-settlement of RSUs (derivative conversion), not an open-market purchase or sale for cash. The withheld/disposed shares are routine for tax withholding and do not necessarily indicate a change in sentiment. The filing appears timely (filed one day after the transaction date).

Form 4

Period: 2026-05-28

Director

Transactions

Exercise/Conversion
Common Stock
2026-05-28+3,114→ 23,010 total
Exercise/Conversion
Restricted Stock Units
[F2][F3]
2026-05-28−3,114→ 0 total
Exercise: $0.00→ Common Stock (3,114 underlying)
Award
Restricted Stock Units
[F2][F4]
2026-05-28+1,896→ 1,896 total
Exercise: $0.00→ Common Stock (1,896 underlying)

Holdings

Footnotes (4)

[F1]Sylebra Capital Limited (Sylebra HK) and Sylebra Capital LLC (Sylebra US) are the investment sub-advisers to Sylebra Capital Partners Master Fund, Ltd. (SCP MF), 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, and Daniel Patrick Gibson (Gibson) owns 100% of 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 HK, Sylebra US, 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, PARC MF, MENLO MF, and other advisory clients.
[F2]Each restricted stock unit ("RSU") represents a contingent right to receive one share of Impinj common stock.
[F3]On June 5, 2025, the reporting person was granted 3,114 RSUs. These RSUs fully vested on May 28, 2026.
[F4]The restricted stock units will fully vest on May 28, 2027.

Signature

/s/ Yukio Morikubo, Attorney in fact for Daniel Patrick Gibson|2026-05-29

1 file