BillionToOne (BLLN) stock: insider trades, news & valuation
Strong buying
Close · Oct 9, 2026
$98.09
+2.8% on the day
-10.0% over 12 months
52-week range $64.03 – $149.97
Share price and insider trades
BLLN closeInsider buyInsider sale
Bought, 12 months$3.2M
Sold, 12 months$48.4M
Insiders buying5
Insiders selling6
BillionToOne insider trading at a glance (Oct 9, 2026): in the past 12 months, 5 insiders bought $3.2M and 6 sold $48.4M of BLLN stock on the open market, including a cluster buy that began Nov 7, 2025.
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BLLN insider buying and selling by quarter
Open-market purchases (green, above the line) and sales (red, below), by trade date.
| Quarter | Bought | Purchases | Sold | Sales |
|---|---|---|---|---|
| Q4 2026 | — | 0 | $2.5M | 13 |
| Q3 2026 | — | 0 | $36.6M | 119 |
| Q2 2026 | — | 0 | $9.4M | 35 |
| Q1 2026 | — | 0 | — | 0 |
| Q4 2025 | $3.2M | 11 | — | 0 |
Valuation, profit and volume
P/E (trailing)n/aSector median —
Market value—
Profit margin—Revenue growth —
Volume vs. 50-day0.8×Last 5 sessions
Insiders' paper profit+$2.0MOn all tracked purchases +63.5%
Summary
Over the past 12 months, 5 BillionToOne, Inc. insiders reported open-market purchases totaling $3.2M, while 6 insiders reported sales totaling $48.4M. The most recent cluster buy began on Nov 7, 2025, when 5 insiders bought a combined $3.2M. 167 of 167 recorded sales were made under pre-scheduled Rule 10b5-1 trading plans, which are usually less informative than discretionary sales.
Insider transactions
Open-market purchases and sales.
| Filed | Insider | Type | Shares | Price | Value | Since | Score |
|---|---|---|---|---|---|---|---|
| Oct 7SEC | David TsaoCTO | Sell Plan | 4,9162,929 held (−63%) | $108.53 | $534K | -9.6% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 4,28413,941 held (−24%) | $108.39 | $464K | -9.5% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 2,92111,020 held (−21%) | $109.00 | $318K | -10.0% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 2,2007,845 held (−22%) | $107.47 | $236K | -8.7% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 1,90918,225 held (−9%) | $107.19 | $205K | -8.5% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 1,8291,100 held (−62%) | $109.14 | $200K | -10.1% | — |
| Oct 7SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41720,802 held (−6%) | $105.15 | $149K | -6.7% | — |
| Oct 7SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41719,385 held (−7%) | $105.15 | $149K | -6.7% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 86620,134 held (−4%) | $105.90 | $92K | -7.4% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 55510,445 held (−5%) | $105.56 | $59K | -7.1% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 40010,045 held (−4%) | $106.10 | $42K | -7.6% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 1001,000 held (−9%) | $110.09 | $11K | -10.9% | — |
| Oct 7SEC | David TsaoCTO | Sell Plan | 2011,000 held (−0%) | $110.08 | $2K | -10.9% | — |
| Sep 30SEC | Oguzhan AtayCEO, Chair | Sell Plan | 8,333 | $120.64 | $1.0M | -18.7% | — |
| Sep 30SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,666154,502 held (−2%) | $120.64 | $322K | -18.7% | — |
| Sep 28SEC | David TsaoCTO | Sell Plan | 3,3331,000 held (−77%) | $125.00 | $417K | -21.5% | — |
| Sep 28SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41622,219 held (−6%) | $120.00 | $170K | -18.3% | — |
| Sep 23SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41623,635 held (−6%) | $106.61 | $151K | -8.0% | — |
| Sep 21SEC | Thomas P. LynchSee Remarks | Sell Plan | 19,38416,428 held (−54%) | $110.36 | $2.1M | -11.1% | — |
| Sep 21SEC | Thomas P. LynchSee Remarks | Sell Plan | 6,9689,460 held (−42%) | $110.30 | $769K | -11.1% | — |
| Sep 21SEC | Thomas P. LynchSee Remarks | Sell Plan | 5,840700 held (−89%) | $110.29 | $644K | -11.1% | — |
| Sep 21SEC | Thomas P. LynchSee Remarks | Sell Plan | 2,9206,540 held (−31%) | $110.31 | $322K | -11.1% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 7,2148,333 held (−46%) | $101.44 | $732K | -3.3% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 4,46520,534 held (−18%) | $98.63 | $440K | -0.5% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 3,143 | $101.49 | $319K | -3.4% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,666159,834 held (−2%) | $98.00 | $261K | +0.1% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,666157,168 held (−2%) | $98.00 | $261K | +0.1% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,53115,547 held (−14%) | $100.58 | $255K | -2.5% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,45618,078 held (−12%) | $99.57 | $245K | -1.5% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,0103,143 held (−39%) | $100.78 | $203K | -2.7% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,6806,653 held (−20%) | $98.64 | $166K | -0.6% | — |
| Sep 16SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,5005,153 held (−23%) | $99.57 | $149K | -1.5% | — |
| Sep 11SEC | David TsaoCTO | Sell Plan | 10,0001,000 held (−91%) | $100.00 | $1.0M | -1.9% | — |
| Sep 11SEC | David TsaoCTO | Sell Plan | 10,00011,000 held (−48%) | $97.54 | $975K | +0.6% | — |
| Sep 11SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41625,051 held (−5%) | $97.54 | $138K | +0.6% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 8,28510,433 held (−44%) | $100.12 | $829K | -2.0% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 2,9976,047 held (−33%) | $100.11 | $300K | -2.0% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 2,518932 held (−73%) | $100.20 | $252K | -2.1% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 1,94418,718 held (−9%) | $98.97 | $192K | -0.9% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 1,1314,173 held (−21%) | $100.33 | $113K | -2.2% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 7759,658 held (−7%) | $100.83 | $78K | -2.7% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 6149,044 held (−6%) | $99.00 | $61K | -0.9% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 5763,450 held (−14%) | $98.89 | $57K | -0.8% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 3855,304 held (−7%) | $99.22 | $38K | -1.1% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 3585,689 held (−6%) | $100.82 | $36K | -2.7% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 232700 held (−25%) | $100.92 | $23K | -2.8% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 1474,026 held (−4%) | $101.41 | $15K | -3.3% | — |
| Sep 10SEC | Thomas P. LynchSee Remarks | Sell Plan | 3820,662 held (−0%) | $96.47 | $4K | +1.7% | — |
| Aug 27SEC | David TsaoCTO | Sell Plan | 10,0001,000 held (−91%) | $100.00 | $1.0M | -1.9% | — |
| Aug 27SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41726,467 held (−5%) | $100.00 | $142K | -1.9% | — |
| Aug 12SEC | David TsaoCTO | Sell Plan | 10,0001,000 held (−91%) | $92.86 | $929K | +5.6% | — |
| Aug 12SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41727,884 held (−5%) | $92.86 | $132K | +5.6% | — |
| Aug 7SEC | Oguzhan AtayCEO, Chair | Sell Plan | 15,539 | $150.03 | $2.3M | -34.6% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 9,98915,198 held (−40%) | $137.25 | $1.4M | -28.5% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 6,35425,187 held (−20%) | $136.42 | $867K | -28.1% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 6,250168,750 held (−4%) | $137.37 | $859K | -28.6% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 6,250162,500 held (−4%) | $137.37 | $859K | -28.6% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 3,125842 held (−79%) | $137.25 | $429K | -28.5% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 3,1247,094 held (−31%) | $137.25 | $429K | -28.5% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,43112,767 held (−16%) | $138.09 | $336K | -29.0% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,9833,967 held (−33%) | $136.42 | $271K | -28.1% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,98110,218 held (−16%) | $136.42 | $270K | -28.1% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 7626,332 held (−11%) | $138.09 | $105K | -29.0% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 76082 held (−90%) | $138.09 | $105K | -29.0% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 55531,676 held (−2%) | $133.81 | $74K | -26.7% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 26712,500 held (−2%) | $139.21 | $37K | -29.5% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 26932,231 held (−1%) | $133.01 | $36K | -26.3% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 17312,243 held (−1%) | $133.81 | $23K | -26.7% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1735,993 held (−3%) | $133.81 | $23K | -26.7% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 13531,541 held (−0%) | $135.42 | $18K | -27.6% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 826,250 held (−1%) | $139.21 | $11K | -29.5% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 82 | $139.20 | $11K | -29.5% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 846,166 held (−1%) | $133.01 | $11K | -26.3% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 8412,416 held (−1%) | $133.00 | $11K | -26.2% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 4412,199 held (−0%) | $135.41 | $6K | -27.6% | — |
| Aug 5SEC | Oguzhan AtayCEO, Chair | Sell Plan | 435,950 held (−1%) | $135.41 | $6K | -27.6% | — |
| Aug 4SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 4,000200,000 held (−2%) | $140.21 | $561K | -30.0% | — |
| Jul 20SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 5,6017,806 held (−42%) | $128.96 | $722K | -23.9% | — |
| Jul 20SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 5,55913,407 held (−29%) | $127.89 | $711K | -23.3% | — |
| Jul 20SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 2,13318,966 held (−10%) | $126.98 | $271K | -22.8% | — |
| Jul 20SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 9066,900 held (−12%) | $129.78 | $118K | -24.4% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 3,8352,028 held (−65%) | $125.76 | $482K | -22.0% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 3,18511,821 held (−21%) | $125.85 | $401K | -22.1% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 2,47717,421 held (−12%) | $123.84 | $307K | -20.8% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 2,41515,006 held (−14%) | $124.90 | $302K | -21.5% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 2,2747,588 held (−23%) | $123.71 | $281K | -20.7% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 1,7255,863 held (−23%) | $124.65 | $215K | -21.3% | — |
| Jul 15SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41732,135 held (−4%) | $125.46 | $178K | -21.8% | — |
| Jul 15SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41730,718 held (−4%) | $125.46 | $178K | -21.8% | — |
| Jul 15SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41729,301 held (−5%) | $125.46 | $178K | -21.8% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 1,1389,862 held (−10%) | $122.84 | $140K | -20.1% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 1,10219,898 held (−5%) | $122.90 | $135K | -20.2% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 1,0281,000 held (−51%) | $126.90 | $130K | -22.7% | — |
| Jul 15SEC | David TsaoCTO | Sell Plan | 82111,000 held (−7%) | $126.89 | $104K | -22.7% | — |
| Jul 13SEC | Oguzhan AtayCEO, Chair | Sell Plan | 7,4895,011 held (−60%) | $125.43 | $939K | -21.8% | — |
| Jul 13SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 4,000208,000 held (−2%) | $125.00 | $500K | -21.5% | — |
| Jul 13SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,657352 held (−88%) | $127.44 | $339K | -23.0% | — |
| Jul 13SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,0023,009 held (−40%) | $126.48 | $253K | -22.4% | — |
| Jul 13SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 1,355205,354 held (−1%) | $125.00 | $169K | -21.5% | — |
| Jul 13SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 1,354204,000 held (−1%) | $125.00 | $169K | -21.5% | — |
| Jul 13SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 1,117206,709 held (−1%) | $125.00 | $140K | -21.5% | — |
| Jul 13SEC | Oguzhan AtayCEO, Chair | Sell Plan | 352 | $128.23 | $45K | -23.5% | — |
| Jul 13SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 174207,826 held (−0%) | $125.00 | $22K | -21.5% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 6,22312,125 held (−34%) | $123.07 | $766K | -20.3% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 5,2536,872 held (−43%) | $123.81 | $650K | -20.8% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 3,63921,291 held (−15%) | $119.37 | $434K | -17.8% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,324176,271 held (−1%) | $123.25 | $286K | -20.4% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 2,323182,521 held (−1%) | $123.25 | $286K | -20.4% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,9451,836 held (−51%) | $123.07 | $239K | -20.3% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,82819,463 held (−9%) | $120.66 | $221K | -18.7% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,642194 held (−89%) | $123.81 | $203K | -20.8% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,32024,930 held (−5%) | $118.49 | $156K | -17.2% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,221181,300 held (−1%) | $124.04 | $151K | -20.9% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,221175,050 held (−1%) | $124.04 | $151K | -20.9% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,11518,348 held (−6%) | $121.84 | $136K | -19.5% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,1384,700 held (−19%) | $119.36 | $136K | -17.8% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,034186,466 held (−1%) | $118.81 | $123K | -17.4% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 1,034180,216 held (−1%) | $118.81 | $123K | -17.4% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 6226,250 held (−9%) | $124.61 | $78K | -21.3% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 587184,844 held (−0%) | $122.08 | $72K | -19.7% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 586178,595 held (−0%) | $122.08 | $72K | -19.7% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 591185,875 held (−0%) | $119.67 | $71K | -18.0% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 591179,625 held (−0%) | $119.67 | $71K | -18.0% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 5704,130 held (−12%) | $120.66 | $69K | -18.7% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 444185,431 held (−0%) | $120.69 | $54K | -18.7% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 444179,181 held (−0%) | $120.69 | $54K | -18.7% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 4125,838 held (−7%) | $118.49 | $49K | -17.2% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 3493,781 held (−8%) | $121.84 | $43K | -19.5% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 194 | $124.61 | $24K | -21.3% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 50181,250 held (−0%) | $124.74 | $6K | -21.4% | — |
| Jul 8SEC | Oguzhan AtayCEO, Chair | Sell Plan | 50175,000 held (−0%) | $124.74 | $6K | -21.4% | — |
| Jul 6SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 80121,099 held (−4%) | $124.91 | $100K | -21.5% | — |
| Jul 1SEC | Bosch John Roderick TenSvp Of Laboratory Operations | Sell Plan | 1,41633,552 held (−4%) | $120.00 | $170K | -18.3% | — |
| Jun 26SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 4,000212,000 held (−2%) | $110.00 | $440K | -10.8% | — |
| Jun 26SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 4,000208,000 held (−2%) | $110.00 | $440K | -10.8% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 2,9783,961 held (−43%) | $102.60 | $306K | -4.4% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 2,88911,230 held (−20%) | $103.68 | $300K | -5.4% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 2,81614,119 held (−17%) | $102.77 | $289K | -4.6% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 2,4616,939 held (−26%) | $101.37 | $249K | -3.2% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 2,3981,563 held (−61%) | $103.63 | $249K | -5.3% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 2,36116,935 held (−12%) | $101.55 | $240K | -3.4% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 1,70419,296 held (−8%) | $100.37 | $171K | -2.3% | — |
| Jun 17SEC | Bosch John Roderick TenSee Remarks | Sell Plan | 1,41636,384 held (−4%) | $101.47 | $144K | -3.3% | — |
| Jun 17SEC | Bosch John Roderick TenSee Remarks | Sell Plan | 1,41634,968 held (−4%) | $101.47 | $144K | -3.3% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 1,0009,400 held (−10%) | $100.05 | $100K | -2.0% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 60010,400 held (−5%) | $98.74 | $59K | -0.7% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 5631,000 held (−36%) | $104.32 | $59K | -6.0% | — |
| Jun 17SEC | David TsaoCTO | Sell Plan | 23011,000 held (−2%) | $104.47 | $24K | -6.1% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 6,250 | $100.00 | $625K | -1.9% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 6,250187,500 held (−3%) | $100.00 | $625K | -1.9% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 6,250193,750 held (−3%) | $96.45 | $603K | +1.7% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 5,46620,705 held (−21%) | $94.76 | $518K | +3.5% | — |
| Jun 10SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 4,66627,816 held (−14%) | $99.27 | $463K | -1.2% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 4,37214,477 held (−23%) | $96.89 | $424K | +1.2% | — |
| Jun 10SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 4,000212,000 held (−2%) | $100.00 | $400K | -1.9% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 4,06610,411 held (−28%) | $98.12 | $399K | -0.0% | — |
| Jun 10SEC | Shan Riku SakakibaraChief Product Officer | Sell Plan | 4,000216,000 held (−2%) | $96.45 | $386K | +1.7% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 3,6056,806 held (−35%) | $99.06 | $357K | -1.0% | — |
| Jun 10SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 2,91832,982 held (−8%) | $99.09 | $289K | -1.0% | — |
| Jun 10SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 2,70025,116 held (−10%) | $101.38 | $274K | -3.2% | — |
| Jun 10SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 1,81623,300 held (−7%) | $102.34 | $186K | -4.2% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 1,85618,849 held (−9%) | $95.59 | $177K | +2.6% | — |
| Jun 10SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 1,40021,900 held (−6%) | $100.31 | $140K | -2.2% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 5566,250 held (−8%) | $99.97 | $56K | -1.9% | — |
| Jun 10SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 30032,682 held (−1%) | $100.05 | $30K | -2.0% | — |
| Jun 10SEC | Nancy Joann JohnsonSee Remarks | Sell Plan | 20032,482 held (−1%) | $100.99 | $20K | -2.9% | — |
| Jun 10SEC | Oguzhan AtaySee Remarks | Sell Plan | 7926,171 held (−0%) | $100.87 | $8K | -2.8% | — |
| Nov 12SEC | Nancy Joann JohnsonSee Remarks | Buy | 6,90035,900 held (+24%) | $60.00 | $414K | +63.5% | — |
| Nov 12SEC | Akshay RaiDirector | Buy | 2,50013,509 held (+23%) | $60.00 | $150K | +63.5% | — |
| Nov 12SEC | David TsaoCTO | Buy | 1,000new position | $60.00 | $60K | +63.5% | — |
| Nov 12SEC | Bosch John Roderick TenSee Remarks | Buy | 80037,800 held (+2%) | $60.00 | $48K | +63.5% | — |
| Nov 12SEC | Thomas P. LynchSee Remarks | Buy | 100700 held (+17%) | $60.00 | $6K | +63.5% | — |
| Nov 10SEC | Thomas S BremnerDirector | Buy | 17,791693,143 held (+3%) | $60.00 | $1.1M | +63.5% | — |
| Nov 10SEC | Thomas S BremnerDirector | Buy | 6,867246,939 held (+3%) | $60.00 | $412K | +63.5% | — |
| Nov 10SEC | Thomas S BremnerDirector | Buy | 5,446275,364 held (+2%) | $60.00 | $327K | +63.5% | — |
| Nov 10SEC | Thomas S BremnerDirector | Buy | 4,084159,795 held (+3%) | $60.00 | $245K | +63.5% | — |
| Nov 10SEC | Thomas S BremnerDirector | Buy | 4,016156,456 held (+3%) | $60.00 | $241K | +63.5% | — |
| Nov 10SEC | Thomas S BremnerDirector | Buy | 3,462179,733 held (+2%) | $60.00 | $208K | +63.5% | — |
Insiders at BillionToOne, Inc.
| Insider | Bought | Sold | Last filing | Score |
|---|---|---|---|---|
| Oguzhan AtayCEO, Chair | — | $23.0M | Sep 30, 2026 | — |
| David TsaoCTO | $60K | $11.0M | Oct 7, 2026 | — |
| Thomas S BremnerDirector | $2.5M | — | Nov 10, 2025 | — |
| Thomas P. LynchSee Remarks | $6K | $5.9M | Sep 21, 2026 | — |
| Nancy Joann JohnsonSee Remarks | $414K | $3.3M | Jul 20, 2026 | — |
| Shan Riku SakakibaraChief Product Officer | — | $3.2M | Aug 4, 2026 | — |
| Bosch John Roderick TenSvp Of Laboratory Operations | $48K | $2.0M | Oct 7, 2026 | — |
| Akshay RaiDirector | $150K | — | Nov 12, 2025 | — |
BLLN stock: common questions
Are BillionToOne, Inc. insiders buying BLLN stock?
In the past 12 months, 5 insiders reported open-market purchases of BLLN worth $3.2M. The latest was See Remarks Nancy Joann Johnson bought $414K of BLLN at $60.00 — first open-market purchase in our records; raises the stake by 24%.
Are BillionToOne, Inc. insiders selling BLLN stock?
6 insiders reported sales worth $48.4M over the same period.
Where does this data come from?
Every transaction comes from Form 4 filings that insiders must submit to the SEC within two business days of a trade. We pull them from SEC EDGAR every night.
What is BLLN's 52-week range?
Over the past year BLLN has traded between $64.03 and $149.97. It last closed at $98.09 on Oct 9, 2026.