Transaction · 0002087127-26-000009

Tsao David

Tsao David, CTO, reported a transaction classified as unknown at BillionToOne, Inc. involving 20000.000000 shares for an estimated $0.00. Reported holdings after the transaction were 21000.000000 shares. A 10b5-1 reference was not detected in the stored filing text.

unknownSEC transaction code CCTO
BLLNBillionToOne, Inc.
Trade date
Sep 03, 2026
Filing date
Sep 09, 2026
View on SEC Insider profile
Estimated value$0Shares × reported price
Shares traded20.0k$0.00 per share
Holdings after21.0kDirect
% of reported position tradedUnavailableThis security and ownership context
How reported position traded is calculated

Calculated only for code-P purchases and code-S sales.

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.

Filing warnings

Notes recorded with this filing
1 warning
delayed filingThe filing was reported 6 calendar days after the transaction date.

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 +43.5%1w ago -1.6%1d ago -3.0%
Returns since7d +4.5%30d -3.8%90d180d1y

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
unknown
Code C
Identifier
0002087127-26-000009
Class A Common Stock
Transaction date
Sep 03, 2026
Filed Sep 09, 2026, 01:55 AM · 6d delay
Shares
20,000 sh
$0.00 per share
Estimated value
$0
Computed from shares × price
Holdings after
21,000 sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $100kLarge $1.00M
Delayed Filing Direct Ownership Large Holdings Increase
Filing-only score

0 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.
  • delayed_filing-6 points

    reporting_delay_days = 6

    Filing delay exceeds the configured threshold.
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

Chief Technology Officer

Officer YesDirector Yes10% NoOther No
Footnotes & amended
  1. F1

    These shares of Class B common stock were converted at a 1:1 ratio for shares of Class A common stock at the option of the holder.

  2. F2

    Each share of Class B Common Stock is convertible into one share of Class A common stock at the option of the holder. Class B common stock will convert automatically on a one-for-one basis into shares…

Original filing · 0002087127-26-000009
Related transactions

0 other transactions

Same SEC filing
Recent company activity

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