The Form 144 signals an officer's intent to sell a meaningful block of shares relative to his recent trading pattern, though the shares originated from RSU vesting and may reflect routine portfolio diversification. Monitor subsequent Form 4 filings to confirm whether the sale was executed and at what price, and watch for any additional insider selling patterns ahead of the next earnings report.
How the stock moved after the report
⚠ Clustered NEUTRAL VIEWSTOCK BELOW ENTRY AT T+1- T+0 · Oct 29 $21.23entry
- T+1 · 7d ago −4.76%α −4.28% · $20.22
- T+5 · due 13h ago Pending
- T+5 · todayOpen
- T+20 · in 21d Pending
- T+60 · in 3mo Pending
Price Chart
How similar events traded
Executive Summary
Michael A. Pisetsky, an officer of SI-BONE, Inc., filed a Form 144 notice of intent to sell 29,665 shares of common stock through the Michael Pisetsky Separate Property Trust, with an estimated aggregate market value of approximately $647,587 based on a filing date price of $21.83 per share. The shares were acquired upon vesting of restricted stock units between July 2018 and October 2025, and the proposed sale represents a notable insider disposition relative to recent insider selling activity.
Key Facts
- Form 144 filed by Michael A. Pisetsky, an officer of SI-BONE, Inc., on October 29, 2026.
- Proposed sale of 29,665 shares of common stock by the Michael Pisetsky Separate Property Trust.
- Estimated aggregate market value of the proposed sale is $647,586.95 based on a price of approximately $21.83 per share.
- Shares were acquired upon vesting of restricted stock units during the period from July 23, 2018 through October 1, 2025.
- The filing indicates the shares are to be sold on or after October 29, 2026 on the Nasdaq exchange.
- The insider also reported two recent open-market sales: 3,133 shares on October 2, 2026 and 3,725 shares on August 17, 2026.
- The proposed sale of 29,665 shares represents approximately 0.3% of SIBN's market cap of $961 million.
- Recent insider activity in the 30 days prior to the snapshot included 8 sells totaling $1.3 million.
Financial Impact
Proposed sale of 29,665 shares valued at approximately $647,587, representing about 0.07% of SIBN's market capitalization.
Risk Factors
- Form 144 is an intent to sell; the actual sale may not occur or may be at a different price.
- The filing does not disclose the insider's remaining beneficial ownership, making it difficult to assess the proportional impact of the sale.
- The proposed sale follows two smaller open-market sales in August and October 2026, suggesting a pattern of insider monetization.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001950047-26-010483 |
| Document: 0001950047-26-010483-index.html | 0001950047-26-010483 |
| Document: 0001950047-26-010483.txt | 0001950047-26-010483 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Nov 4, 2026 1d ago | Insider Cluster | $24.00 | awaiting T+20 | awaiting T+20 | $24.27 (+1.13%) |
Nov 4, 2026 1d ago | 144 | $24.00 | awaiting T+20 | awaiting T+20 | $24.27 (+1.13%) |
Nov 4, 2026 1d ago | 144 | $24.00 | awaiting T+20 | awaiting T+20 | $24.27 (+1.13%) |
Nov 4, 2026 1d ago | 144 | $24.00 | awaiting T+20 | awaiting T+20 | $24.27 (+1.13%) |
Nov 2, 2026 3d ago | Insider Cluster | $23.77 | awaiting T+20 | awaiting T+20 | $24.27 (+2.10%) |
Nov 2, 2026 3d ago | 8-K | No price | awaiting T+20 | awaiting T+20 | No price |
Nov 2, 2026 3d ago | Press Release | $23.77 | awaiting T+20 | awaiting T+20 | $24.27 (+2.10%) |
Oct 29, 2026 7d ago | 144 | $21.23 | awaiting T+20 | awaiting T+20 | $24.27 (+14.32%) |
Oct 29, 2026 7d ago | 144 | $21.23 | awaiting T+20 | awaiting T+20 | $24.27 (+14.32%) |
Oct 19, 2026 17d ago | Press Release | $20.54 | awaiting T+20 | awaiting T+20 | $24.27 (+18.16%) |
US Market Status
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