Follow the people · Insider
Shan Riku Sakakibara
Shan Riku Sakakibara files insider transactions with the SEC as a chief product officer of BillionToOne (BLLN). We hold 4 disclosed purchases and sales filed since 12 November 2025, 3 of them in the last 90 days.
- Files forBLLN
- Disclosed buys and sells4 in all, 3 in the last 90 days
- Last disclosure4 August 2026
Positions held
1 post we hold — a term names its own dates; a run of filings only says when they filed- Filed 7 November 2025 — 31 July 2026Chief Product Officer · BillionToOne (BLLN)28 Form 4 lines · source: SEC Form 4
Everything they disclosed
28 entries, newest first — one per disclosure report, one per Form 4 line- ▼ sold on the open market 4,000 shares of BillionToOneSEC Form 44 August 2026Class A Common Stock · traded 31 July 2026 · filed 4 August 2026
- exercised options over 174 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- exercised options over 174 shares of BillionToOne (a derivative holding)SEC Form 413 July 2026Stock Option (right to buy) · traded 9 July 2026 · filed 13 July 2026
- exercised options over 1,117 shares of BillionToOne (a derivative holding)SEC Form 413 July 2026Stock Option (right to buy) · traded 9 July 2026 · filed 13 July 2026
- exercised options over 1,355 shares of BillionToOne (a derivative holding)SEC Form 413 July 2026Stock Option (right to buy) · traded 9 July 2026 · filed 13 July 2026
- exercised options over 1,354 shares of BillionToOne (a derivative holding)SEC Form 413 July 2026Stock Option (right to buy) · traded 9 July 2026 · filed 13 July 2026
- exercised options over 1,117 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- exercised options over 1,355 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- exercised options over 1,354 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- ▼ sold on the open market 4,000 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- ▼ sold on the open market 174 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- ▼ sold on the open market 1,117 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- ▼ sold on the open market 1,355 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- ▼ sold on the open market 1,354 shares of BillionToOneSEC Form 413 July 2026Class A Common Stock · traded 9 July 2026 · filed 13 July 2026
- exercised options over 4,000 shares of BillionToOneSEC Form 426 June 2026Class A Common Stock · traded 24 June 2026 · filed 26 June 2026
- ▼ sold on the open market 4,000 shares of BillionToOneSEC Form 426 June 2026Class A Common Stock · traded 24 June 2026 · filed 26 June 2026
- ▼ sold on the open market 4,000 shares of BillionToOneSEC Form 426 June 2026Class A Common Stock · traded 24 June 2026 · filed 26 June 2026
- exercised options over 4,000 shares of BillionToOne (a derivative holding)SEC Form 426 June 2026Stock Option (right to buy) · traded 24 June 2026 · filed 26 June 2026
- ▼ sold on the open market 4,000 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- ▼ sold on the open market 4,000 shares of BillionToOneSEC Form 410 June 2026Class A Common Stock · traded 8 June 2026 · filed 10 June 2026
- acquired or disposed of, other 50,000 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 50,000 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 40,000 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 40,000 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 65,000 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 65,000 shares of BillionToOne (a derivative holding)SEC Form 412 November 2025Stock Option (right to buy) · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 220,000 shares of BillionToOneSEC Form 412 November 2025Common Stock · traded 7 November 2025 · filed 12 November 2025
- acquired or disposed of, other 220,000 shares of BillionToOneSEC Form 412 November 2025Class A Common Stock · traded 7 November 2025 · filed 12 November 2025
Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.