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BillionToOne, Inc.

BLLN
Exchange
Nasdaq
Industry
Services-Medical Laboratories
SEC CIK
0002070849

In the last 90 days, BillionToOne, Inc. insiders filed 0 open-market purchases and 21 sales; 155 institutions reported holding it in 13F filings for Q2 2026, worth $1.82B in total; no superinvestor holds it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by BillionToOne, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
21 filings
6 insiders, $34.9M in total
Insiders trading
6
Net value
−$34.9M
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for BillionToOne, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for BillionToOne, Inc.
NameTitleLast reported holdingLast filingFilings, past year
ten Bosch John RoderickSVP of Laboratory Operations23,635Sep 23, 20268
Lynch Thomas P.See Remarks700Sep 21, 20263
Atay OguzhanChairman and CEO157,168IndirectSep 16, 20268
Sakakibara Shan RikuChief Product Officer196,500Sep 14, 20266
Tsao DavidChief Technology Officer1,000Sep 11, 20267
Kolluri Krishna KittuDirector57,839IndirectAug 28, 20265
Johnson Nancy JoAnnSee Remarks6,900Jul 20, 20264
Bremner Thomas SDirector11,350Jun 12, 20262
Rai AkshayDirector14,026Jun 12, 20263
Ileri FiratDirector, 10% Owner40,331Jun 12, 20262
Pagano AnthonyDirector7,913Jun 12, 20262
NeoTribe Partners I, LLC10% Owner87,362Jun 11, 20263
NeoTribe Ventures I, L.P.10% Owner87,362Jun 11, 20263
NeoTribe Associates I, L.P.10% Owner87,362Jun 11, 20263
Neotribe Ignite Partners I, LLC10% Owner87,362Jun 11, 20263
Neotribe Ignite Fund I, L.P.10% Owner87,362Jun 11, 20263
Neotribe Partners SPV I BTO, LLC10% Owner87,362Jun 11, 20263
Neotribe SPV I BTO, LLC10% Owner87,362Jun 11, 20263
Decoster Lukas10% Owner2,580,833IndirectJan 20, 20261
Van den Brande Barend10% Owner2,580,833IndirectJan 20, 20261
HB&Q NV (HB&Q Compartment III)10% Owner2,580,833IndirectJan 20, 20261
Hummingbird Dragons CommV10% Owner2,580,833IndirectJan 20, 20261
Hummingbird Collective CommV10% Owner2,580,833IndirectJan 20, 20261
Humming Bird Ventures Management NV10% Owner2,580,833IndirectJan 20, 20261
Hummingbird Ventures III CommV10% Owner2,580,833IndirectJan 20, 20261
Hummingbird Opportunity Fund II CommV10% Owner2,580,833IndirectJan 20, 20261
Lister JohnChief Administrative Officer–Nov 12, 20251
Taylor RossChief Financial Officer–Nov 12, 20251

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Sep 23, 2026 (view filing)5:50 PM ETSep 212 daysten Bosch John RoderickSVP of Laboratory OperationsSSaleClass A Common Stock−1.42K$106.61−$151.0K−5.7%23.6K after10b5-1
Sep 21, 2026 (view filing)7:00 PM ETSep 174 daysLynch Thomas P.See RemarksSSaleClass A Common Stock−35.1K$110.33−$3.87M−98.0%700 after4 lots10b5-1
Sep 16, 2026 (view filing)6:43 PM ETSep 142 daysAtay OguzhanChairman and CEOSSaleClass A Common Stock−25.0K$100.32−$2.51M−100.0%0 after8 lots10b5-1
Sep 16, 2026 (view filing)6:43 PM ETSep 142 daysAtay OguzhanChairman and CEOSSaleClass A Common Stock−5.33K$98.00−$522.5K−3.3%157.2K after2 lots10b5-1
Sep 11, 2026 (view filing)6:01 PM ETSep 92 daysten Bosch John RoderickSVP of Laboratory OperationsSSaleClass A Common Stock−1.42K$97.54−$138.1K−5.4%25.1K after10b5-1
Sep 11, 2026 (view filing)6:01 PM ETSep 92 daysTsao DavidChief Technology OfficerSSaleClass A Common Stock−20.0K$98.77−$1.98M−95.2%1.00K after2 lots10b5-1
Sep 10, 2026 (view filing)7:44 PM ETSep 82 daysLynch Thomas P.See RemarksSSaleClass A Common Stock−20.0K$99.99−$2.00M−96.6%700 after13 lots10b5-1
Aug 27, 2026 (view filing)8:19 PM ETAug 252 daysTsao DavidChief Technology OfficerSSaleClass A Common Stock−10.0K$100.00−$1.00M−90.9%1.00K after10b5-1
Aug 27, 2026 (view filing)8:19 PM ETAug 252 daysten Bosch John RoderickSVP of Laboratory OperationsSSaleClass A Common Stock−1.42K$100.00−$141.7K−5.1%26.5K after10b5-1
Aug 12, 2026 (view filing)6:55 PM ETAug 102 daysten Bosch John RoderickSVP of Laboratory OperationsSSaleClass A Common Stock−1.42K$92.86−$131.6K−4.8%27.9K after10b5-1
Aug 12, 2026 (view filing)6:51 PM ETAug 102 daysTsao DavidChief Technology OfficerSSaleClass A Common Stock−10.0K$92.86−$928.6K−90.9%1.00K after10b5-1
Aug 7, 2026 (view filing)4:02 PM ETAug 52 daysAtay OguzhanChairman and CEOSSaleClass A Common Stock−15.5K$150.03−$2.33M−100.0%0 after10b5-1
Aug 5, 2026 (view filing)8:52 PM ETAug 32 daysAtay OguzhanChairman and CEOSSaleClass A Common Stock−32.5K$136.95−$4.45M−100.0%0 after21 lots10b5-1
Aug 5, 2026 (view filing)8:52 PM ETAug 32 daysAtay OguzhanChairman and CEOSSaleClass A Common Stock−12.5K$137.37−$1.72M−7.1%162.5K after2 lots10b5-1
Aug 4, 2026 (view filing)4:32 PM ETJul 314 daysSakakibara Shan RikuChief Product OfficerSSaleClass A Common Stock−4.00K$140.21−$560.8K−2.0%200.0K after10b5-1
Jul 20, 2026 (view filing)7:38 PM ETJul 164 daysJohnson Nancy JoAnnSee RemarksSSaleClass A Common Stock−14.2K$128.29−$1.82M−67.3%6.90K after4 lots10b5-1
Jul 15, 2026 (view filing)4:38 PM ETJul 132 daysten Bosch John RoderickSVP of Laboratory OperationsSSaleClass A Common Stock−4.25K$125.46−$533.3K−12.7%29.3K after3 lots10b5-1
Jul 15, 2026 (view filing)4:38 PM ETJul 132 daysTsao DavidChief Technology OfficerSSaleClass A Common Stock−20.0K$124.88−$2.50M−95.2%1.00K after10 lots10b5-1
Jul 13, 2026 (view filing)4:39 PM ETJul 94 daysAtay OguzhanChairman and CEOSSaleClass A Common Stock−12.5K$126.10−$1.58M−100.0%0 after4 lots10b5-1
Jul 13, 2026 (view filing)4:39 PM ETJul 94 daysSakakibara Shan RikuChief Product OfficerSSaleClass A Common Stock−8.00K$125.00−$1.00M−3.8%204.0K after5 lots10b5-1
Jul 8, 2026 (view filing)7:06 PM ETJul 62 daysAtay OguzhanChairman and CEOSSaleClass A Common Stock−26.3K$122.05−$3.20M−100.0%0 after14 lots10b5-1
Jul 8, 2026 (view filing)7:06 PM ETJul 62 daysAtay OguzhanChairman and CEOSSaleClass A Common Stock−12.5K$122.05−$1.53M−6.7%175.0K after14 lots10b5-1
Jul 6, 2026 (view filing)8:38 PM ETJul 15 daysJohnson Nancy JoAnnSee RemarksSSaleClass A Common Stock−801$124.91−$100.1K−3.7%21.1K after10b5-1
Jul 1, 2026 (view filing)4:23 PM ETJun 292 daysten Bosch John RoderickSVP of Laboratory OperationsSSaleClass A Common Stock−1.42K$120.00−$169.9K−4.0%33.6K after10b5-1
Jun 26, 2026 (view filing)Jun 242 daysSakakibara Shan RikuChief Product OfficerSSaleClass A Common Stock−8.00K$110.00−$880.0K−3.7%208.0K after2 lots10b5-1
Jun 17, 2026 (view filing)Jun 152 daysTsao DavidChief Technology OfficerSSaleClass A Common Stock−20.0K$102.26−$2.05M−95.2%1.00K after11 lots10b5-1
Jun 17, 2026 (view filing)Jun 152 daysten Bosch John RoderickSee RemarksSSaleClass A Common Stock−2.83K$101.47−$287.4K−7.5%35.0K after2 lots10b5-1
Jun 10, 2026 (view filing)Jun 82 daysAtay OguzhanSee RemarksSSaleClass A Common Stock−26.3K$97.66−$2.56M−100.0%0 after8 lots10b5-1
Jun 10, 2026 (view filing)Jun 82 daysAtay OguzhanSee RemarksSSaleClass A Common Stock−12.5K$98.23−$1.23M−6.3%187.5K after2 lots10b5-1
Jun 10, 2026 (view filing)Jun 82 daysSakakibara Shan RikuChief Product OfficerSSaleClass A Common Stock−8.00K$98.23−$785.8K−3.6%212.0K after2 lots10b5-1
Jun 10, 2026 (view filing)Jun 8-92 daysJohnson Nancy JoAnnSee RemarksSSaleClass A Common Stock−14.0K$100.18−$1.40M−39.0%21.9K after7 lots10b5-1
Nov 12, 2025 (view filing)Nov 75 daysLynch Thomas P.See RemarksPPurchaseClass A Common Stock+100$60.00+$6.00K+16.7%700 after
Nov 12, 2025 (view filing)Nov 75 daysTsao DavidChief Technology OfficerPPurchaseClass A Common Stock+1.00K$60.00+$60.0KNew position1.00K after
Nov 12, 2025 (view filing)Nov 75 daysten Bosch John RoderickSee RemarksPPurchaseClass A Common Stock+800$60.00+$48.0K+2.2%37.8K after
Nov 12, 2025 (view filing)Nov 75 daysJohnson Nancy JoAnnSee RemarksPPurchaseClass A Common Stock+6.90K$60.00+$414.0K+23.8%35.9K after
Nov 12, 2025 (view filing)Nov 75 daysRai AkshayDirectorPPurchaseClass A Common Stock+2.50K$60.00+$150.0K+22.7%13.5K after
Nov 10, 2025 (view filing)Nov 73 daysBremner Thomas SDirectorPPurchaseClass A Common Stock+41.7K$60.00+$2.50M+6.4%693.1K after6 lots