BLLN BillionToOne, Inc. Insider Trading

Nancy Johnson sold 14,199 shares ($1.8M) via 4 transactions on 2026-07-16 under 10b5-1 plan; 67.3% of holdings reduced

Nancy Johnson executed 4 separate sales totaling 14,199 shares for $1,821,628.11 at blended average price $128.29 under a 10b5-1 trading plan adopted 2026-03-06, reducing her holdings by 67.3% from 21,099 to 6,900 shares post-transaction. The transaction is scheduled under a pre-arranged plan rather than discretionary. At current price of $125.14, the stock trades 9.8% below its 52-week high of $138.70, though it has gained 19.0% over the prior 30 days and 40.6% over 90 days. Johnson's prior trades at this ticker show consistent 90-day positive outcomes (ranging from +20.5% to +28.9%), though those post-sale return measurements are forward-looking and not yet fully resolved. The sale's material size and the scheduled nature of the transaction warrant monitoring of subsequent filings and company developments.

CTO David Tsao sold 20,000 shares at avg $124.88 on BLLN (2026-07-13), per pre-arranged 10b5-1 plan; retains 1.0K non-derivative shares + 1,210,000 option shares.

David Tsao executed 10 separate sales totaling 20,000 shares for $2,497,697.56 on 2026-07-13 through a pre-arranged 10b5-1 trading plan adopted 2026-03-06, reducing his non-derivative position from 21,000 to 1,000 shares. The stock has risen +24.9% over the prior 30 days and +64.8% over 90 days, and currently trades at $129.88 against a 52-week high of $138.70. His derivative holdings total 1,210,000 shares in unexercised options, representing material upside exposure that remained intact after this scheduled sale. BillionToOne's fundamentals show revenue growth of +100.0% year-over-year and a P/E of 49.38, suggesting a premium valuation at the time of this execution.

BLLN CEO Atay sold 12,500 shares for $1.6M via scheduled 10b5-1 plan; retains 575,000 option shares.

Oguzhan Atay executed 4 separate sales totaling 12,500 shares for $1,576,275.72 on 2026-07-09, priced between $125.43 and $128.23 per share. This transaction was scheduled under a 10b5-1 trading plan adopted 2026-03-06, not a discretionary trade. The current stock price of $123.25 sits 11.1% below the 52-week high of $138.70, yet the 30-day change shows +21.9% and 90-day change shows +48.9%. Notably, Atay retains 575,000 option shares post-transaction, meaning the underlying economic position remains substantial. His prior 5 trades at BLLN (all on 2026-06-08) each showed positive 30-day outcomes ranging from 19.6% to 27.3%, suggesting the stock has moved favorably after his prior sales at this ticker. The company posts strong fundamentals: annual revenue growth of +100.0%, net income of $17,970,000 on revenue of $108,388,000, and a market cap of $1,377,746,057.75.

CPO Shan Riku Sakakibara sells 8,000 shares of BLLN for $1.0M under scheduled 10b5-1 plan, retains 204,000 non-derivative shares plus 223,411 derivative holdings

Shan Riku Sakakibara, Chief Product Officer of BillionToOne, executed 5 separate sales totaling 8,000 shares for $1,000,000.00 at $125.00 per share on 2026-07-09, a reduction of 3.8% from his pre-transaction holdings of 212,000 shares. This transaction is part of a pre-arranged 10b5-1 trading plan adopted on 2026-03-06, meaning the sales were scheduled rather than discretionary. The current stock price of $123.25 sits 11.1% below the 52-week high of $138.70, though the stock has appreciated 21.9% over the past 30 days and 48.9% over 90 days. The insider retains substantial non-derivative exposure (204,000 shares post-sale) and maintains derivative holdings totaling 223,411 shares across four stock option vehicles, indicating material ongoing commitment to the company. BillionToOne has demonstrated strong fundamentals with 100% annual revenue growth and a profitable quarter ($18.0M net income on $108.4M revenue), though the P/E of 46.86 reflects a high valuation relative to earnings.

BLLN CEO Oguzhan Atay sold 38,750 shares for $4,729,379.10 via 28 separate transactions on 2026-07-06 under 10b5-1 plan; retains 175,000 shares plus 1,181,250 options.

Oguzhan Atay, Chairman and CEO of BillionToOne, executed 28 separate sales totaling 38,750 shares for $4,729,379.10 on 2026-07-06, reducing his non-derivative holdings to 175,000 shares from 213,750 shares. This transaction was executed under a pre-arranged 10b5-1 trading plan adopted on 2026-03-06, making it scheduled rather than discretionary. The blended average price across all sales was $122.05, while the current price stands at $120.60 and the stock has risen +27.7% over the 30-day window and +46.2% over 90 days. The insider retains 1,181,250 shares through derivative holdings (593,750 stock options and 587,500 stock options), indicating his economic exposure to BLLN remains substantial despite the sale of common shares.

BillionToOne CPO Sakakibara sold 8,000 shares for $880,000.00 under scheduled 10b5-1 plan; retains 208,000 shares plus 36,000 stock options

Shan Riku Sakakibara, Chief Product Officer of BillionToOne, Inc., executed 2 separate sales totaling 8,000 shares for $880,000.00 on 2026-06-24 at $110.00 per share, reducing his non-derivative holdings from 216,000 to 208,000 shares. This sale was part of a pre-arranged 10b5-1 trading plan adopted on 2026-03-06, meaning it was scheduled rather than discretionary. At the transaction price of $110.00, the stock currently trades at $118.17, reflecting a +29.8% gain over the past 30 days and +69.9% over 90 days. The insider maintains significant non-derivative exposure via 208,000 shares post-transaction and retains derivative rights to 36,000 additional shares through stock options, indicating continued substantive equity stake in the company.

CTO David Tsao sells 20,000 shares for $2.0M via 11 scheduled transactions on 2026-06-15

David Tsao, Chief Technology Officer at BillionToOne, Inc., executed 11 separate sales totaling 20,000 shares for $2,045,325.51 ($2.0M) on 2026-06-15 at a blended average price of $102.27, reducing his non-derivative holdings from 21,000 shares to 1,000 shares (-95.2% vs pre-transaction holdings). This transaction is part of a pre-arranged 10b5-1 trading plan adopted on 2026-03-06, meaning the sales were scheduled and not discretionary. The insider retains significant derivative holdings comprising 1,250,000 shares in stock options (630,000 shares and 620,000 shares remaining), representing meaningful ongoing economic exposure to the company. The current share price of $99.38 sits 28.4% below the 52-week high of $138.70, and the 30-day price change is +15.4% while the 90-day change is +34.3%, providing recent market context for the transaction execution.

CPO Sakakibara sells 8,000 shares ($785.8K) via scheduled 10b5-1 plan; retains 212,000 shares post-transaction

Shan Riku Sakakibara, Chief Product Officer, executed 2 separate sales totaling 8,000 shares for $785,800.00 on 2026-06-08, reducing his holdings from 220,000 to 212,000 shares. The transaction was conducted under a pre-arranged 10b5-1 trading plan adopted on 2026-03-06, meaning it was scheduled rather than discretionary. The blended average price of $98.22 compares closely to the current price of $99.26, with the stock trading 28.4% below its 52-week high of $138.70. BillionToOne demonstrates strong fundamentals with annual revenue growth of +100.0% and a market cap of $1,109,574,634.42, though the P/E of 37.74 reflects premium valuation typical of high-growth companies.

Nancy Joann Johnson sold 14,000 shares ($1.4M) at BLLN in 7 transactions under pre-arranged 10b5-1 plan on 2026-06-08/09

Nancy Joann Johnson executed 7 separate sales totaling 14,000 shares for $1,402,539.80 on June 8–9, 2026, reducing her holdings from 35,900 to 21,900 shares (-39.0%). The trades were conducted under a pre-arranged 10b5-1 trading plan adopted on 2026-03-06, meaning they were scheduled rather than discretionary. While the blended average sale price of $100.18 sits modestly above the current price of $99.26, the stock has declined -28.4% from its 52-week high of $138.70, suggesting the insider sold into relative weakness compared to recent peaks. BillionToOne's fundamentals remain solid with annual revenue growth of +100.0%, a $1.1B market cap, and positive net income of $17,970,000.00, though the P/E of 37.74 reflects a premium valuation.

Oguzhan Atay sells 38,750 shares for $3,791,445.43 via 10b5-1 plan; retains 187,500 non-derivative shares plus options/Class B holdings

Oguzhan Atay executed 10 separate sales totaling 38,750 shares for $3,791,445.43 on 2026-06-08 under a pre-arranged 10b5-1 trading plan adopted on 2026-03-06. This represents a -17.1% reduction in non-derivative holdings, bringing post-transaction shares to 187,500. However, the insider retains significant derivative exposure through 620,000 stock options, 613,750 stock options, and 2,217,542 Class B Common Stock shares. The stock has appreciated +55.0% over the past 90 days and trades at $99.26, down -28.4% from its 52-week high of $138.70. With the company posting 100% annual revenue growth and a market cap of $1,109,574,634.42, the scheduled nature of this trade under a pre-arranged 10b5-1 plan means the sale reflects automatic execution rather than discretionary conviction or timing judgment.