Transaction · 0002070849-26-000069

Lynch Thomas P.

Lynch Thomas P., SR, reported an open-market or private sale at BillionToOne, Inc. involving 19384.000000 shares for an estimated $2139193.04. Reported holdings after the transaction were 16428.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SSR
BLLNBillionToOne, Inc.
Trade date
Sep 17, 2026
Filing date
Sep 21, 2026
View on SEC Insider profile
Disclosed value-$2.13MShares × reported price
Shares traded19.3k$110.36 per share
Holdings after16.4kDirect
% of reported position traded54.13%This security and ownership context
How reported position traded is calculated

Shares sold ÷ (holdings after + shares sold). Estimated position before: 35,812 shares.

Row-level estimate for this security and ownership context, not the insider’s complete portfolio. Joint ownership, other transactions in the filing, amendments and footnotes can affect interpretation.

BLLN price since this filing

Daily closing prices, with the filing date and available return windows
BLLN · Daily closing priceLoading daily prices…
Filing dateReturn windows appear as prices become available.
Pre-filing1mo ago -15.3%1w ago -5.2%1d ago -0.2%
Returns since7d +17.2%30d +0.8%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0002070849-26-000069
Class A Common Stock
Transaction date
Sep 17, 2026
Filed Sep 21, 2026, 11:00 PM · 4d delay
Shares
19,384 sh
$110.36 per share
Estimated value
-$2.13M
Computed from shares × price
Holdings after
16,428 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Cluster Selling Direct Ownership Large Holdings Reduction Large Sale Repeat Seller 10b5-1 Detected
Filing-only score

-4 points

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

How this score is calculated
  • direct_ownership+6 points

    direct_or_indirect_ownership = D

    Direct ownership reports the insider's personal stake.
  • tenb5_1_detected-10 points

    is_10b5_1 = true

    Stored filing content includes detected 10b5-1 language.
Read the scoring methodology

Signed filing-only points, not a probability or expected return. Version v1.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

See Remarks

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    The transactions reported on this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 8, 2026.

  2. F2

    The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.000 to $110.970 per share, inclusive. The holder undertakes to p…

  3. F3

    The reported price in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $110.000 to $110.890 per share, inclusive. The holder undertakes to p…

  4. F4

    The options are fully vested and exercisable. The terms of the underlying option grant are as previously reported on the Reporting Person's Form 3 filed on November 5, 2025.

Original filing · 0002070849-26-000069
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