⌘K

LBRX Institutional Ownership & 13F Holders | SmartMoneyDB

LBRXLB PHARMACEUTICALS INC

COM SHS · CUSIP 50180M108

Smart Money Ownership

Of the 10 tracked institutions holding LBRX, 3 have a 3-year clone track record — 3 of them beat the S&P. Average holder's clone alpha: +4.5pt. It's a gauge of who owns the name, not just how many.

PRICE T ROWE ASSOCIATES INC /MD/

$605.0K

+3.5pt

Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →

LBRX (LB PHARMACEUTICALS INC) Institutional Ownership Summary

Among the 10 tracked institutional investors we monitor, LBRX (LB PHARMACEUTICALS INC) is held with a combined value of $235.30M across 7,599,523 shares. The largest holder is BlackRock, Inc. with a position worth $88.74M. VANGUARD GROUP INC opened a new position in the most recent quarter. 5 funds increased their holdings. 2 funds reduced their position.

Total Institutional Value

$235.30M

Total Shares Held

7,599,523

Institutional Holders

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

VANGUARD GROUP INCNew position~$24.8M BlackRock, Inc.+11% shares~$8.6M MILLENNIUM MANAGEMENT LLC+89% shares~$4.0M STATE STREET CORP+19% shares~$3.2M WELLINGTON MANAGEMENT GROUP LLP+12% shares~$203.3K

13F Institutional Holders

Sort

BlackRock, Inc.

0.00% of book+10.7%

$88.74M

RA CAPITAL MANAGEMENT, L.P.

MILLENNIUM MANAGEMENT LLC

BAKER BROS. ADVISORS LP

WELLINGTON MANAGEMENT GROUP LLP

0.00% of book+11.9%

$1.91M

PRICE T ROWE ASSOCIATES INC /MD/

0.00% of book+40.8%

$605.00K

#	Fund	Value↓	Shares	Portfolio %	Change
1	BlackRock, Inc.	$88.74M	2,734,305	0.00%	+10.7%
2	RA CAPITAL MANAGEMENT, L.P.	$71.68M	2,208,604	0.62%	-
3	VANGUARD GROUP INC	$24.77M	1,112,978	0.00%	New
4	STATE STREET CORP	$19.54M	602,028	0.00%	+19.4%
5	MILLENNIUM MANAGEMENT LLC	$8.41M	259,219	0.01%	+89.3%
6	CITADEL ADVISORS LLC	$7.01M	215,969	0.00%	-48.2%
7	BAKER BROS. ADVISORS LP	$6.49M	200,000	0.03%	-
8	FMR LLC	$6.13M	188,907	0.00%	-15.1%
9	WELLINGTON MANAGEMENT GROUP LLP	$1.91M	58,891	0.00%	+11.9%
10	PRICE T ROWE ASSOCIATES INC /MD/	$605.00K	18,622	0.00%	+40.8%

Activist & Large Holders (13D/13G)

Investor	Ownership	Type	Filed
JPMORGAN CHASE & CO	4.3%	13G/A	2026-10-13
TCG Crossover GP II, LLC	5.0%

Frequently Asked Questions

Which institutional investors own the most LBRX stock?

As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of LBRX with a position worth $88.74M, representing 0.00% of their portfolio. In total, 10 institutional investors hold LBRX with a combined value of $235.30M.

Are hedge funds buying or selling LBRX?

In the most recent quarter, 1 fund opened a new position in LBRX. Additionally, 5 increased their holdings and 2 reduced their positions.

What percentage of LBRX is owned by institutional investors?

Institutional investors hold $235.30M worth of LBRX stock across 10 positions. The largest institutional holder is BlackRock, Inc. with $88.74M in holdings.

What is a 13F filing and why does it matter for LBRX?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For LBRX, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track LBRX institutional moves

Get notified when hedge funds change their LBRX positions.