Sakakibara Shan Riku
- SEC CIK
- 0002088547
In the past year, 4 open-market sale filings worth $3.23M and no purchases.
Current role at each company
- BLLN BillionToOne, Inc.Chief Product Officeras of Sep 14, 2026
Open-market trades in the past year
Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.
- Bought
- –
- 0 filings
- Sold
- $3.23M
- 4 filings
- Net
- −$3.23M
- Bought minus sold
- Companies
- 1
- With open-market trades
Trades
Every Form 4 that lists Sakakibara Shan Riku as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Aug 4, 2026 (view filing)4:32 PM ET | Jul 31 | 4 days | Sakakibara Shan RikuChief Product Officer | SSaleClass A Common Stock | −4.00K | $140.21 | −$560.8K | −2.0%200.0K after | 10b5-1 |
| Jul 13, 2026 (view filing)4:39 PM ET | Jul 9 | 4 days | Sakakibara Shan RikuChief Product Officer | SSaleClass A Common Stock | −8.00K | $125.00 | −$1.00M | −3.8%204.0K after | 5 lots10b5-1 |
| Jun 26, 2026 (view filing) | Jun 24 | 2 days | Sakakibara Shan RikuChief Product Officer | SSaleClass A Common Stock | −8.00K | $110.00 | −$880.0K | −3.7%208.0K after | 2 lots10b5-1 |
| Jun 10, 2026 (view filing) | Jun 8 | 2 days | Sakakibara Shan RikuChief Product Officer | SSaleClass A Common Stock | −8.00K | $98.23 | −$785.8K | −3.6%212.0K after | 2 lots10b5-1 |