Quick Takeaways
- Mika Nishimura has 2 issuer positions tracked on this page.
- Estimated disclosed ownership value: $912,262.
- Recent insider filing activity is available below.
- Info
- Insider Ownership
Insider Trading & Ownership of Mika Nishimura
- Location
- Santa Clara, CA
- Summary
- The estimated net worth of Mika Nishimura is at least $912,262 dollars as of 13 Mar 2026. Mika Nishimura is the Director of ACCURAY INC and owns shares of ACCURAY INC (ARAY) stock worth about $459.8K. Mika Nishimura is the Director of SI-BONE, Inc. and owns shares of SI-BONE, Inc. (SIBN) stock worth about $452.4K.
- Signature
- /s/ Michael Pisetsky, Attorney-in-Fact for Mika Nishimura
- All Insider Reports
- All Insider Reports
Follow Filing Activity
Follow Mika Nishimura and return when a new Insider Trading filing changes the record on this page.
This uses the existing product follow flow to surface future filing-backed changes without guessing what they mean.
What Changed
- Largest disclosed position: ACCURAY INC ($459,823).
- Past-year value change for that position: .
Why This Matters
- This page translates Forms 3/4/5 into a quick ownership context before you inspect each transaction row.
- You can cross-check role, issuer, and filing chronology directly against the SEC source.
Source Evidence
Filed on Form 4
See Original Filing
Insider ownership context is sourced from SEC Forms 3, 4, and 5.
Ownership of Mika Nishimura
| Symbol | Company | Relationship | Holdings Value | Past Year Net Change | Change % | Report Period |
|---|---|---|---|---|---|---|
| ARAY | ACCURAY INC | Director | $459,823 | 28 Nov 2025 | ||
| SIBN | SI-BONE, Inc. | Director | $452,439 | -$56,700 | -11% | 12 Mar 2026 |
Insider Transactions Reported by Mika Nishimura:
| Sym | Company | Class | Transaction | % | Value $ | * Price $ | Shares | Shares After | Date | Ownership |
|---|
* An asterisk sign (*) next to the price indicates that the price is likely invalid.