Reporting owner · CIK 0001659824
Lynch Thomas P.
SEC Form 4 history across 1 companies, 37 transactions and 4 filings.
SRSee RemarksBillionToOne, Inc.
Open-market transaction mix0% buys0 buys · 17 sales
Available history · Sep 08, 2026 – Oct 13, 2026
Latest insider transactions
Form 4 filings from available history.| Company | Insider | Activity | Disclosed value | Filed (ET) |
|---|---|---|---|---|
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exerciseDerivative securitySEC filing ↗ | -$17.3kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exerciseSEC filing ↗ | $17.3kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exerciseDerivative securitySEC filing ↗ | -$69.2kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exerciseSEC filing ↗ | $69.2kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | -$179kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | -$49.9kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | -$80.4kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | -$167kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | S · sale10b5-1 detectedSEC filing ↗ | -$644kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | S · sale10b5-1 detectedSEC filing ↗ | -$322kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | S · sale10b5-1 detectedSEC filing ↗ | -$768kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | S · sale10b5-1 detectedSEC filing ↗ | -$2.13MView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedSEC filing ↗ | $179kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedSEC filing ↗ | $49.9kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedSEC filing ↗ | $80.4kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedSEC filing ↗ | $167kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | -$102kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | -$28.4kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | -$45.8kView disclosure → | |
BLLNBillionToOne, Inc. | Lynch Thomas P.SR | M · exercise10b5-1 detectedDerivative securitySEC filing ↗ | -$95.5kView disclosure → |
Latest Form 4 facts
Quick context from source filings
Latest open-market transaction
sale at BillionToOne, Inc. on Sep 17, 2026 valued at $644,112.
Review SEC filingLatest buy
No open-market insider purchase is available.
Monthly open-market activity
Last 2 reported months · purchases and sales
View exact monthly values
| Month | Purchases | Sales | Buy value | Sale value | Net value |
|---|---|---|---|---|---|
| Sep 2026 | 0 | 17 | $0.00 | $5,873,845.70 | -$5,873,845.70 |
| Oct 2026 | 0 | 0 | $0.00 | $0.00 | $0.00 |
Net value is disclosed purchases minus sales, not profit. A dash means the value is unavailable.
Ownership and transaction size
Ownership and ticket size
Average P/S size$345.5K
Median P/S size$113.5K
Direct37
Indirect0
Oct 13, 2026exercise
Filing-only signals
Deterministic matches in this insider's history
Associated companies
Companies in the disclosed reporting history
Open-market buy performance
90-day forward return on this insider's open-market purchases
No open-market purchases in available history
A 90-day purchase return requires an open-market buy. No eligible purchases are recorded in this history.
Disclosed ownership
How reported shareholdings evolved
Non-derivative shares held after reported transactions—not stock prices or a complete portfolio.
27 observations · Sep 8, 2026 – Oct 13, 2026. Window ends at the latest available report, not today.
Selected observation · Oct 13, 202610,700 shares reported
Inspect transaction View exact observations and source transactions
| Transaction date | Shares held after | Filed | Source |
|---|---|---|---|
| Sep 8, 2026 | 11,742 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 15,711 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 17,374 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 20,700 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 20,662 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 18,718 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 10,433 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 9,658 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 9,044 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 6,047 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 5,689 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 5,304 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 4,173 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 4,026 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 3,450 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 932 | Sep 10, 2026 | View transaction |
| Sep 8, 2026 | 700 | Sep 10, 2026 | View transaction |
| Sep 17, 2026 | 20,084 | Sep 21, 2026 | View transaction |
| Sep 17, 2026 | 27,052 | Sep 21, 2026 | View transaction |
| Sep 17, 2026 | 29,972 | Sep 21, 2026 | View transaction |
| Sep 17, 2026 | 35,812 | Sep 21, 2026 | View transaction |
| Sep 17, 2026 | 16,428 | Sep 21, 2026 | View transaction |
| Sep 17, 2026 | 9,460 | Sep 21, 2026 | View transaction |
| Sep 17, 2026 | 6,540 | Sep 21, 2026 | View transaction |
| Sep 17, 2026 | 700 | Sep 21, 2026 | View transaction |
| Oct 8, 2026 | 8,700 | Oct 13, 2026 | View transaction |
| Oct 13, 2026 | 10,700 | Oct 19, 2026 | View transaction |
Securities and direct/indirect ownership contexts are kept separate and never summed. Joint filings may associate the same disclosed row with multiple owners. Unknown values are omitted, not treated as zero. Lines connect observations for readability; they do not establish holdings between filings, cost basis, or current ownership. Amendments and stock splits require reviewing the source.
Lynch Thomas P. Insider Activity FAQ
SEC Form 4 context
Who is Lynch Thomas P.?
Lynch Thomas P. is a reporting owner in SEC Form 4 filings with reporting owner CIK 0001659824.
Which companies has Lynch Thomas P. reported transactions for?
BillionToOne, Inc.
When was Lynch Thomas P.'s latest insider buy?
No open-market insider purchase is available for this period.
When was Lynch Thomas P.'s latest insider sale?
sale at BillionToOne, Inc. on Sep 17, 2026 valued at $644,112.
Where can I see the original SEC filings?
Each transaction row links directly to the source SEC filing so the reported Form 4 details can be reviewed.
Are performance metrics included?
The profile shows average and median 90-day stock returns after open-market purchases when price coverage is available. These are unadjusted stock returns, not realized trading gains. Win rates, benchmark-adjusted returns and conviction scores are not calculated.