Rubrik (RBRK) Director John W. Thompson Sells ~13,500 Shares

What Happened
John Wendell Thompson, a director of Rubrik, reported multiple transactions on Aug 3, 2026. He sold a total of 13,500 shares in open-market transactions (1,500 @ $73.79, 1,000 @ $74.59, 5,740 @ $73.73, 5,260 @ $74.51) for aggregate proceeds of approximately $1,000,408. The filing also shows conversion/exercise activity involving 11,000 derivative shares (recorded with $0 exercise price and described as fully vested).

These were sales (not purchases), which are often routine dispositions. The derivative entries indicate Thompson converted/exercised derivative securities (11,000 shares); some of these converted/derived shares appear in the related disposal/exercise reporting.

Key Details

• Transaction date: Aug 3, 2026 (Form 4 filed Aug 4, 2026 — timely filing)
• Open-market sales: 13,500 shares total; weighted-average prices reported; gross proceeds ≈ $1,000,408
  • 1,500 shares @ $73.79 = $110,685
  • 1,000 shares @ $74.59 = $74,590
  • 5,740 shares @ $73.73 = $423,210
  • 5,260 shares @ $74.51 = $391,923
• Derivative activity: 11,000 shares shown as conversion/exercise (reported as $0 exercise price; fully vested)
• Shares owned after transaction: not specified in the provided summary — see the full Form 4 for post-transaction holdings
• Notable footnotes:
  • F1: At least one sale was effected pursuant to a Rule 10b5-1 trading plan (adopted Oct 6, 2025)
  • F2–F6: Reported prices are weighted averages; each sale block was executed in multiple transactions across stated price ranges
  • F3: Some shares are held of record by the John and Sandra Thompson Trust (Thompson is co-trustee)
  • F7: Derivative shares were fully vested
  • F8: Class B shares are convertible to Class A under the certificate of incorporation (explains $0 conversion entries)

Context

• Derivative/option notes: The filing shows conversion/exercise of 11,000 derivative shares (fully vested). The $0 exercise/conversion entries and footnote about Class B→A conversion suggest these were conversions of non‑cash‑settled derivative or class‑conversion events rather than a cash exercise; the converted shares were reported alongside disposals. Check the full Form 4 for exact mechanics (cashless sale, conversion, or exercise).
• Interpretation: Sales by directors are common and do not by themselves indicate company prospects; purchases typically carry more weight for signaling. This filing appears routine and was timely filed.