How many institutional investors hold BLLN?

3 tracked institutional investors disclosed a position in BLLN (BILLIONTOONE INC) in their most recent 13F filing.

Who is the largest institutional holder of BLLN?

Ken Griffin, Citadel Advisors, holds the largest disclosed position in BLLN, valued at $12M.

Where does this BLLN ownership data come from?

SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.

BLLN — BILLIONTOONE INC

Name: BILLIONTOONE INC (BLLN) — Institutional Ownership
Creator: InvestorLens
License: https://www.sec.gov/about/website-policies

Public company

For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

About BILLIONTOONE INC (BLLN)

BILLIONTOONE INC (BLLN) appears in the most recent 13F filings of 3 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $12M. Across recent filings, tracked investors recorded 4 new positions, 0 increased, 0 reduced, and 0 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in BLLN

100

/100

Strong Institutional Accumulation

Added / Increased4

Reduced0

Exited0

BearishBullish

Crowded Trade Score™

How many top investors track BLLN

/100

Emerging Interest

3investors

A small number of top investors own this.

UndiscoveredCrowded

151015+

BLLN Ownership Composition

How BILLIONTOONE INC is held across tracked investor types, based on reported 13F positions.

Dominant Type

Hedge Funds

56% of tracked value

Institutions

tracked investors

Total Reported

$2M

combined 13F value

Hedge Funds56.2%
Other43.8%

Hedge Funds(1)

56.2%

Other(2)

43.8%

Tracked investors reporting BLLN

Investor	Firm	Shares	Market value	% of portfolio	As of
Ken Griffin	Citadel Advisors	5.4K	$426.3K	0.00%	Mar 31, 2026
George Soros	Soros Fund Management	14.5K	$1.1M	0.01%	Mar 31, 2026
Izzy Englander	Millennium Management	5.7K	$467K	0.00%	Dec 31, 2025

Ken GriffinMar 31, 2026
Citadel Advisors
Shares
5.4K
Value
$426.3K
% Portfolio
0.00%
George SorosMar 31, 2026
Soros Fund Management
Shares
14.5K
Value
$1.1M
% Portfolio
0.01%
Izzy EnglanderDec 31, 2025
Millennium Management
Shares
5.7K
Value
$467K
% Portfolio
0.00%

Recent activity

Investor	Action	Δ %	Current value	Filing date
Izzy Englander	New	—	$467K	Feb 17, 2026
George Soros	New	—	$1.2M	Feb 13, 2026
George Soros	New	—	$1.1M	May 15, 2026
Ken Griffin	New	—	$12.2M	Feb 17, 2026

Izzy Englander
New
$467KFeb 17, 2026
George Soros
New
$1.2MFeb 13, 2026
George Soros
New
$1.1MMay 15, 2026
Ken Griffin
New
$12.2MFeb 17, 2026

Frequently asked questions

How many institutional investors hold BLLN?: 3 tracked institutional investors disclosed a position in BLLN (BILLIONTOONE INC) in their most recent 13F filing.
Who is the largest institutional holder of BLLN?: Ken Griffin, Citadel Advisors, holds the largest disclosed position in BLLN, valued at $12M.
Did institutional ownership of BLLN increase or decrease?: Across recent 13F filings, tracked investors recorded 4 new positions, 0 increased, 0 reduced, and 0 fully exited BLLN.
Where does this BLLN ownership data come from?: SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.