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Company
▲ Purchases (0 ops.)
▼ Sales (37 ops.)
Latest filing published 07 Oct 2026 for BillionToOne, Inc., €25k. Read the official filing
Filing timeline
BuySaleDavid Tsao
Insider track record
Disclosed buys
0
Disclosed sells
37
Signal history
David Tsao: trading record in brief
David Tsao discloses dealings in BillionToOne, Inc. to SEC (Form 4). Over a trading history stretching from 7 November 2025 to 5 October 2026, the count stands at 51 filings.
No open-market purchase appears, only 37 sales worth €7.8M. No amount is published for 11 filings, which the totals therefore leave out. Besides market trades, the filings include 11 option exercises. 2026 to date brings no purchases and 37 sales.
On 7 October 2026 came the latest disclosure, an option exercise for €25k in BillionToOne, Inc. Filings reach the SEC (Form 4) feed a median of 2 days after the trade. Section 16 rules allow two business days to file each Form 4. Selling is not necessarily a view on the stock: liquidity needs and diversification are common motives. Every figure here comes from the filings published by SEC (Form 4) and describes the past, not future prices; it is not investment advice.
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Declarations51 total
10,000 shares@ US$2.80Class A Common StockSEC:0002087127-26-000015:0
10,000 shares@ US$2.80Class A Common StockSEC:0002087127-26-000015:1
866 shares@ US$105.9004Class A Common StockSEC:0002087127-26-000015:2
1,909 shares@ US$107.195Class A Common StockSEC:0002087127-26-000015:3
4,284 shares@ US$108.393Class A Common StockSEC:0002087127-26-000015:4
2,921 shares@ US$109.0031Class A Common StockSEC:0002087127-26-000015:5
20 shares@ US$110.08Class A Common StockSEC:0002087127-26-000015:6
555 shares@ US$105.5587Class A Common StockSEC:0002087127-26-000015:7
400 shares@ US$106.1038Class A Common StockSEC:0002087127-26-000015:8
2,200 shares@ US$107.4705Class A Common StockSEC:0002087127-26-000015:9
4,916 shares@ US$108.5342Class A Common StockSEC:0002087127-26-000015:10
1,829 shares@ US$109.1445Class A Common StockSEC:0002087127-26-000015:11
100 shares@ US$110.09Class A Common StockSEC:0002087127-26-000015:12
3,333 shares@ US$125.00Class A Common StockSEC:0002087127-26-000013:1
3,333 shares@ US$2.800.0002% mcap0.1% of flowClass A Common StockSEC:0002087127-26-000013:0
10,000 shares@ US$2.800.0006% mcap0.2% of flowClass A Common StockSEC:0002087127-26-000011:1
10,000 shares@ US$2.800.0005% mcap0.2% of flowClass A Common StockSEC:0002087127-26-000011:0
10,000 shares@ US$97.540.018% mcap7.7% of flowClass A Common StockSEC:0002087127-26-000011:2
10,000 shares@ US$100.000.018% mcap7.9% of flowClass A Common StockSEC:0002087127-26-000011:3
20,000 shares0Class A Common StockSEC:0002087127-26-000009:1
20,000 shares0Class A Common StockSEC:0002087127-26-000009:0
10,000 shares@ US$2.800.0005% mcap0.2% of flowClass A Common StockSEC:0002087127-26-000006:0
10,000 shares@ US$100.00Class A Common StockSEC:0002087127-26-000006:1
10,000 shares@ US$92.860.020% mcap11.8% of flowClass A Common StockSEC:0002070849-26-000058:1
10,000 shares@ US$2.800.0005% mcap0.2% of flowClass A Common StockSEC:0002070849-26-000058:0
25 of 51 declarations
