Welcome to our dedicated page for BillionToOne SEC filings (Ticker: BLLN), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
BillionToOne, Inc. filings document the regulatory record for a public molecular diagnostics company commercializing QCT-based prenatal and oncology testing. Recent Form 8-K disclosures furnish operating results, financial guidance, Regulation FD presentation materials and executive compensation arrangements, including the company’s annual incentive plan and equity-based payment provisions.
Proxy materials describe annual meeting mechanics, stockholder voting matters, board governance and related governance disclosures. Together, the filings address the company’s clinical testing revenue categories, Class A common stock compensation framework, furnished earnings materials and governance matters relevant to its Nasdaq-listed operating-company status.
BillionToOne, Inc. executive ten Bosch John Roderick, SVP of Laboratory Operations, executed pre-arranged open-market sales of 4,251 shares of Class A Common Stock at $125.4600 per share on July 13, 2026, under a Rule 10b5-1 trading plan adopted on March 6, 2026.
BillionToOne, Inc. Chief Technology Officer and director David Tsao reported multiple open-market sales of Class A Common Stock on July 13, 2026, totaling 20,000 shares at weighted-average prices, with underlying trade ranges from $122.185 to $127.2981 per share as detailed in footnotes. He also exercised stock options for 20,000 shares at a $2.8000 exercise price from fully vested options, pursuant to a Rule 10b5-1 trading plan adopted on March 6, 2026.
BillionToOne, Inc. Chairman and CEO Atay Oguzhan exercised options to acquire 12,500 shares of Class A Common Stock at $2.80 per share and on the same date executed open-market sales of 12,500 shares in multiple transactions at weighted average prices between $125.00 and $128.295 per share. Following these trades, he held no shares of Class A Common Stock directly but continued to hold 575,000 stock options. The transactions were carried out under a Rule 10b5-1 trading plan, and the options are reported as fully vested and exercisable.
BillionToOne, Inc. Chief Product Officer Shan Riku Sakakibara reported open‑market sales of Class A Common Stock totaling 8,000 shares at $125.00 per share on July 9, 2026. On the same date, Sakakibara exercised stock options for 4,000 shares of Class A Common Stock at exercise prices of $30.78 and $8.65 per share. The company notes these trades were effected under a Rule 10b5‑1 trading plan and that the options exercised were fully vested and exercisable.
BLLN has a Form 144 notice for the planned sale of up to 20,000 Class A shares through Fidelity Brokerage Services LLC, tied to a stock option exercise, with a proposed aggregate value of $250,497.77 and an intended sale date of July 13, 2026 on NASDAQ. The filing also lists sales in the prior three months, including 20,000 Class A shares by David Tsao for $2,045,326.00 and 3,500 Class A shares by the Dt 2021 Irrevocable Trust for $355,145.00 on June 15, 2026.
BLLN reports a planned sale of Class A securities through Fidelity Brokerage Services LLC on NASDAQ. The filing lists 4,251 Class A securities associated with a proposed transaction dated July 13, 2026. It also discloses prior Class A transactions labeled as pre-IPO shares and cash sales.
Holder John R. Ten Bosch is reported as having sold Class A securities in the past three months, including 2,832 units for $287,363.04 on June 15, 2026 and 1,416 units for $169,920.00 on June 29, 2026.
BLLN shareholder Fidelity Brokerage Services LLC filed to sell 3,500 Class A shares on NASDAQ, with an aggregate market value of $439,110.00, targeting a sale date of July 13, 2026. The shares are Pre IPO Shares acquired from the issuer for cash on December 30, 2021. The filing also lists recent sales on June 15, 2026 of 20,000 Class A shares for $2,045,326.00 by David Tsao and 3,500 Class A shares for $355,145.00 by the Dt 2021 Irrevocable Trust.
Issuer files a Form 144 notice of proposed sales of Class A shares under Rule 144. The filing lists multiple proposed dispositions by holders and option exercises dated 07/09/2026 and earlier sales in June and July 2026. The excerpt shows representative proposed transactions of 12,500 shares for proceeds of $1,576,275.93 and several recent sales including 26,500 for $3,203,733.13.
Shan Sakakibara submitted notices on a Form 144 to offer shares of Class A common stock. The filing lists proposed sales of 8,000 shares with gross amounts of $785,800 (dated 06/08/2026) and $880,000 (dated 06/24/2026). The filing also lists Pre-IPO shares of 4,000 (dated 01/07/2019) and a Stock Option Exercise entry of 4,000 shares (dated 07/09/2026). The document shows a numeric line of 41,442,834 and a value $1,000,000.00 in the securities table; those figures appear as ledger entries in the excerpt.
BillionToOne, Inc. Chairman and CEO Atay Oguzhan reported a mix of open-market sales and option exercises involving the company’s Class A Common Stock. The Form 4 shows Rule 10b5-1 plan sales totaling 38,750 shares, including shares held indirectly through his spouse, at weighted average prices generally between about $118 and $125 per share.
On the same date, Oguzhan also exercised stock options to acquire 26,250 shares of Class A Common Stock at an exercise price of $2.80 per share, converting derivative awards into direct share ownership while continuing to hold a remaining common stock position as reflected in the filing’s post-transaction share balances.