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Thomas P. Lynch

Insider · Officer · BLLN

Thomas P. Lynch files insider transactions with the SEC as an officer of BillionToOne. We hold 1 disclosed purchase or sale filed since 2 December 2015, 1 of them in the last 90 days.

  • Files for 3 companiesBLLN, CHFS, OREX
  • Disclosed buys and sells1 in all, 1 in the last 90 days
  • Last disclosure10 September 2026

Positions held

3 posts we hold — a term names its own dates; a run of filings only says when they filed
  • Filed 7 November 2025 — 8 September 2026Officer · BillionToOne 32 Form 4 lines · source: SEC Form 4
  • Filed 22 January 2021 — 22 January 2021Chief Legal Compliance Officer · CHF Solutions 1 Form 4 line · source: SEC Form 4
  • Filed 1 December 2015 — 13 October 2017EVP, Chief Admin Off, GC & Sec · Orexigen Therapeutics 10 Form 4 lines · source: SEC Form 4

Every transaction

43 transactions from SEC Form 4 — one row each, sort any column, open a row for the filing
43 of 43 shown
8 Sep 202610 Sep 2026SEC Form 42 dexercised options overnot a tradeBillionToOne11,042 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne2,997 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne358 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne385 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne1,131 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne147 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne576 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne2,518 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne232 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dexercised options overnot a tradeBillionToOnederivative11,042 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dexercised options overnot a tradeBillionToOnederivative3,969 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dexercised options overnot a tradeBillionToOne3,969 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dexercised options overnot a tradeBillionToOnederivative1,663 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dexercised options overnot a tradeBillionToOnederivative3,326 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dexercised options overnot a tradeBillionToOne1,663 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dexercised options overnot a tradeBillionToOne3,326 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne38 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne1,944 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne8,285 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne775 sharesdown −0.3%up +0.3%
8 Sep 202610 Sep 2026SEC Form 42 dsold on the open marketBillionToOne614 sharesdown −0.3%up +0.3%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOnederivative79,400 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOnederivative79,400 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOnederivative15,000 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOnederivative15,000 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOnederivative10,000 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOnederivative10,000 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOnederivative40,000 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOnederivative40,000 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOne600 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dacquired or disposed of, othernot a tradeBillionToOne600 sharesdown −1.3%down −3.0%
7 Nov 202512 Nov 2025SEC Form 45 dbought on the open marketBillionToOne100 sharesdown −1.3%down −3.0%
22 Jan 202126 Jan 2021SEC Form 44 dwas grantednot a tradeCHF Solutionsderivative7,000 shares——
13 Oct 201717 Oct 2017SEC Form 44 dwas grantednot a tradeOREXOrexigen Therapeuticsderivative69,600 shares——
31 May 20172 Jun 2017SEC Form 42 dwas grantednot a tradeOREXOrexigen Therapeutics1,704 shares——
3 Feb 20177 Feb 2017SEC Form 44 dwas grantednot a tradeOREXOrexigen Therapeuticsderivative87,000 shares——
3 Feb 20177 Feb 2017SEC Form 44 dwas grantednot a tradeOREXOrexigen Therapeuticsderivative43,500 shares——
12 Jul 201614 Jul 2016SEC Form 42 dwas grantednot a tradeOREXOrexigen Therapeuticsderivative131,250 shares——
12 Jul 201614 Jul 2016SEC Form 42 dwas grantednot a tradeOREXOrexigen Therapeuticsderivative26,250 shares——
12 Jul 201614 Jul 2016SEC Form 42 dwas grantednot a tradeOREXOrexigen Therapeuticsderivative78,750 shares——
12 Jul 201614 Jul 2016SEC Form 42 dwas grantednot a tradeOREXOrexigen Therapeuticsderivative15,750 shares——
2 Feb 20164 Feb 2016SEC Form 42 dwas grantednot a tradeOREXOrexigen Therapeuticsderivative255,000 shares——
1 Dec 20152 Dec 2015SEC Form 41 dwas grantednot a tradeOREXOrexigen Therapeuticsderivative350,000 shares——

Both percentages are the stock’s move, not Thomas P. Lynch’s return: a disclosure gives a band, never an amount, so nobody can say how much was bought or what it made. They run to the last close we hold — 11 Sep 2026, except where a name has since delisted, when the row names its own last session. We publish no close, no volume and no dollar figure behind them. 32 of the 43 rows shown carry a percentage; the rest are dashes with the reason on the row.

Positions come from the unitedstates/congress-legislators roster, the Office of Government Ethics and the SEC’s Form 4 index. Every disclosed line names its own source and links the document the government published; we print what the filing says and never a price we did not read from it. Headlines and links come from the GDELT Global Knowledge Graph — the story stays with the publisher. The portrait, where we have one, is the public-domain Congressional Bioguide photograph.

Some filings reach us as photographs of paper rather than as a form we can read as text. Those are shown here only once they have been read and checked, so this page can hold fewer lines than the filings behind it contain. The link on every row opens the original document, which is always the full record.