Form 4: SI-BONE CFO Sells Shares for Tax, 10b5-1 Plan

Sentiment:

Insider Transaction Report 6 January 2026 6:20 PM

SI-BONE, Inc.'s CFO, Anshul Maheshwari, reported the sale of 5,229 shares of common stock for tax obligations and under a pre-arranged 10b5-1 trading plan.

Summary

Anshul Maheshwari, Chief Financial Officer of SI-BONE, Inc. (SIBN), reported the sale of 5,229 shares of common stock on January 2, 2026.
A total of 3,677 shares were sold to cover tax withholding obligations related to the vesting of restricted stock units, with weighted-average prices of $19.6252 and $19.6732.
An additional 1,552 shares were sold at a weighted-average price of $19.63, pursuant to a Rule 10b5-1 trading plan established on December 17, 2025.
Following these transactions, Maheshwari beneficially owns 180,002 shares of common stock, which includes 136,335 shares issuable upon settlement of restricted stock units.

Sentiment

Score: 5

Explanation: The filing reports routine, non-discretionary insider stock sales for tax obligations and a pre-arranged 10b5-1 plan, which is a neutral event for company sentiment.

Positives

NA. The filing reports routine insider stock sales for tax obligations and a pre-arranged trading plan, not positive operational or financial news.

Negatives

The Chief Financial Officer reduced direct beneficial ownership by 5,229 shares, although a significant portion was non-discretionary for tax purposes.

Risks

NA. This filing is a transaction report and does not introduce new risks.

Future Outlook

NA. This filing does not contain forward-looking statements or guidance.

Management Comments

NA. The filing contains factual explanations of the transactions but no direct management commentary on company performance or strategy.

Industry Context

NA. This filing reports an individual insider transaction and does not provide broader industry context.

Comparison to Industry Standards

NA. This filing is a routine insider transaction report and does not contain information for comparison to industry standards.

Management Changes

Role	Previous Person	New Person	Effective Date	Reason

Corporate Governance

Change Type	Description	Effective Date	Impact Assessment
Power of Attorney	Anshul Maheshwari has a Power of Attorney in place, dated April 19, 2021, authorizing specific individuals (Laura A. Francis, Michael A. Pisetsky, Matthew B. Hemington, and Kris Tamashiro) to execute and file Forms 3, 4, and 5 on his behalf. This ensures compliance with Section 16(a) of the Securities Exchange Act.	2021-04-19	Streamlines the process for insider trading compliance filings, ensuring timely and accurate reporting by the CFO.

Legal Proceedings

NA. The filing does not mention any litigation or regulatory matters.

Related Party Transactions

NA. The filing does not disclose any related party dealings beyond the insider's stock transactions.

Stakeholder Impact

Shareholders: Minimal impact, as the sales are largely non-discretionary for tax purposes or part of a pre-arranged plan, not indicative of a change in management's view of the company's prospects.

Next Steps

NA. The filing does not mention any future actions, events, or milestones.

Key Dates

Date	Description
2021-04-19	Date Power of Attorney was executed by Anshul Maheshwari.
2025-12-17	Date of the 10b5-1 trading plan under which shares were sold.
2026-01-02	Date of common stock transactions by Anshul Maheshwari.
2026-01-06	Date Form 4 was filed with the SEC.

Keywords

SI-BONE, SIBN, Form 4, Insider Trading, Stock Sale, CFO, Anshul Maheshwari, 10b5-1 Plan, Restricted Stock Units, Tax Withholding

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