Transaction · 0002087127-26-000006

Tsao David

Tsao David, CTO, reported an open-market or private sale at BillionToOne, Inc. involving 10000.000000 shares for an estimated $1000000.00. Reported holdings after the transaction were 1000.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SCTO
BLLNBillionToOne, Inc.
Filing timeAug 28
Trade dateAug 25, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
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Pre-filing
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BLLN price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
BLLN since 2026-08-28Filed 7 days ago · 30 days of pre-filing context shaded
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Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0002087127-26-000006
Class A Common Stock
Transaction date
Aug 25, 2026
Filed Aug 28, 2026, 12:19 AM · 3d delay
Shares
10.0k sh
$10.0k per share
Estimated value
-$100M
Computed from shares × price
Holdings after
1.00k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Cluster Selling Direct Ownership Large Holdings Reduction 10b5-1 Detected
-4score
Filing-only score

-4

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.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Technology Officer

Officer YesDirector Yes10% 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 March 6, 2026.

  2. F2

    The options are fully vested and exercisable.

Original filing · 0002087127-26-000006
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Same reporting owner
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