SI-BONE (SIBN) Director Jeffrey W. Dunn Exercises Options, Sells Shares

What Happened

• Jeffrey W. Dunn, a director of SI‑BONE (SIBN), exercised options to acquire a total of 20,000 shares on 2026-09-01 (two option lots: 18,633 and 1,367 shares) at $4.68 per share (total cash paid $93,600). The same day he sold those 20,000 shares in open-market transactions at a weighted-average price of $18.91, generating gross proceeds of approximately $378,160. The net pre-tax difference between proceeds and exercise cost is about $284,560.
• The filing shows corresponding derivative entries at $0.00 reflecting the option instruments were converted/terminated as part of the exercise.

Key Details

• Transaction date: 2026-09-01; Form 4 filed 2026-09-03 (timely filing).
• Exercise price paid: $4.68 per share (total $93,600). Sale weighted-average price: $18.91 per share (range reported $18.6450–$19.6449).
• Shares exercised: 20,000 (18,633 + 1,367). Shares sold: 20,000 (same-day sale).
• Reported proceeds from sales: ~$378,160; approximate gain before fees/taxes: ~$284,560.
• Notable footnotes:
  • F1: Sales were executed under a 10b5-1 trading plan dated May 7, 2025.
  • F2: Sale price is a weighted average; individual trades ranged $18.6450–$19.6449.
  • F3: Filing notes 10,957 restricted stock units (RSUs) issuable to the reporting person.
  • F4: Some shares are held by The Jeffrey W. Dunn Living Trust (dated May 17, 2012).
  • F5: Option shares vest monthly over four years from the vesting start date.
• Shares owned after the transaction: not specified in the provided data (the filing includes details on RSUs and trust holdings).

Context

• This was an option exercise followed by an immediate sale of the acquired shares (commonly an exercise-and-sell). Because the sale was executed under a preexisting 10b5-1 plan, it indicates the trades were scheduled in advance rather than ad hoc insider selling.
• For retail investors: purchases by insiders are typically more informative as bullish signals; same-day exercise-and-sale mainly realizes gains and may be routine compensation/liquidity management.