Rubrik (RBRK) CFO Kiran Choudary Sells 23,995 Shares

What Happened

• Choudary Kiran Kumar (Kiran Choudary), Chief Financial Officer of Rubrik, disposed of a total of 23,995 shares in open-market transactions on September 15 and September 17, 2026, generating roughly $2.45 million in proceeds. Sale prices ranged roughly from $98.55 to $108.05 per share (reported as weighted averages for several tranches).
• On September 15 he also exercised/converted derivative securities totaling 8,000 shares (reported at $0.00 exercise price in the filing). A separate 13,995-share disposition on September 15 was reported as a payment for exercise price or tax withholding (code F).
• These were sales (not purchases) and appear largely routine (including tax withholding and plan-based sales), not an outright buy signal.

Key Details

• Transaction dates: Sept 15, 2026 and Sept 17, 2026.
• Aggregate disposals: 23,995 shares sold for approximately $2,450,408 in proceeds.
• Derivative activity: 8,000 shares were reported as exercised/converted at $0.00.
• Tax/withholding: 13,995 shares were surrendered/disposed to cover exercise price or tax liability (code F).
• 10b5-1 plan: At least one sale on this Form 4 was effected under a Rule 10b5-1 trading plan adopted April 15, 2026.
• Price details: Several tranches reported as weighted averages with price ranges from about $98.55 up to $108.34 per share (see footnotes for tranche ranges).
• Shares owned after transaction: Not disclosed in the provided Form 4 excerpt.
• Timeliness: Form 4 was filed Sept 17, 2026 (reporting period 9/15/2026) — appears to be filed within the usual two-business-day window.

Context

• The filing shows both derivative exercise/conversion (codes M/C) and immediate sales — commonly a cashless exercise pattern where newly acquired shares are sold to cover taxes or convert equity into cash.
• Sales under a 10b5-1 plan indicate pre-set trading instructions rather than ad hoc trading decisions.
• This is a disclosure of insider selling and exercise activity; it is factual reporting of transactions and does not by itself indicate management sentiment about the company’s outlook.