LBRX LB Pharmaceuticals Inc

NASDAQ
$44.84

LB Pharmaceuticals Inc (LBRX) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
+33.33
8 buyers / 4 sellers
STRONG BUYING
Funds compared
18
funds with comparable LBRX positions
17 current holders · 14 prior-quarter holders
Net share change
+1.02M
+1.56M added, -543.2K cut
Position activity
4 new 4 increased 3 reduced 1 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
Nantahala Capital Management Event Long/Short Increased +1.05M +100.0% $34.2M 2.2% 62
D. E. Shaw & Co., Inc. Quant New +13.5K — $438.7K 0.0% 58
Soleus Capital Management Growth Healthcare Sold Out -10.0K -100.0% $324.6K 0.0% 57
TWO SIGMA INVESTMENTS, LP Quant Increased +35.9K +282.5% $1.2M 0.0% 53
Boothbay Fund Management New +275.7K — $8.9M 0.2% 51
MILLENNIUM MANAGEMENT LLC Increased +122.3K +89.3% $4.0M 0.0% 51
Y-Intercept Quant New +39.4K — $1.3M 0.0% 50
Aquatic Capital Management Quant New +6.0K — $193.3K 0.0% 48
Quadrature Capital Quant Increased +14.0K +141.2% $455.1K 0.0% 47
Logos Global Management Growth Healthcare Reduced -330.0K -36.1% $10.7M 0.8% 43

Most significant buyers

By move score, not size.

  • Nantahala Capital Management Increased · +1.05M
  • D. E. Shaw & Co., Inc. New · +13.5K
  • TWO SIGMA INVESTMENTS, LP Increased · +35.9K
  • Boothbay Fund Management New · +275.7K
  • MILLENNIUM MANAGEMENT LLC Increased · +122.3K

Most significant sellers

By move score, not size.

  • Soleus Capital Management Sold Out · -10.0K
  • Logos Global Management Reduced · -330.0K
  • CITADEL ADVISORS LLC Reduced · -200.9K
  • Balyasny Asset Management L.P. Reduced · -2.2K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
Nantahala Capital Management 3 2.1M 1.1M +1.05M +100.0% 2.2% Increased 62
D. E. Shaw & Co., Inc. 1 13.5K 0 +13.5K — 0.0% New 58
Soleus Capital Management 2 0 10.0K -10.0K -100.0% 0.0% Sold Out 57
TWO SIGMA INVESTMENTS, LP 2 48.7K 12.7K +35.9K +282.5% 0.0% Increased 53
Boothbay Fund Management 4 275.7K 0 +275.7K — 0.2% New 51
MILLENNIUM MANAGEMENT LLC 2 259.2K 137.0K +122.3K +89.3% 0.0% Increased 51
Y-Intercept 4 39.4K 0 +39.4K — 0.0% New 50
Aquatic Capital Management 4 6.0K 0 +6.0K — 0.0% New 48
Quadrature Capital 3 24.0K 9.9K +14.0K +141.2% 0.0% Increased 47
Logos Global Management 2 585.0K 915.0K -330.0K -36.1% 0.8% Reduced 43
CITADEL ADVISORS LLC 1 216.0K 416.9K -200.9K -48.2% 0.0% Reduced 41
Balyasny Asset Management L.P. 2 921.5K 923.7K -2.2K -0.2% 0.1% Reduced 27
Deep Track Capital 1 3.4M 3.4M 0 +0.0% 1.6% Unchanged 33
RA Capital Management 1 2.2M 2.2M 0 +0.0% 0.6% Unchanged 28
Caligan Partners 2 1.4M 1.4M 0 +0.0% 2.3% Unchanged 39
Alyeska Investment Group, L.P. 2 863.9K 863.9K 0 +0.0% 0.1% Unchanged 20
Baker Bros. Advisors 1 200.0K 200.0K 0 +0.0% 0.0% Unchanged 25
Integral Health Asset Management 2 150.0K 150.0K 0 +0.0% 0.2% Unchanged 21

Every fund above opens. Subscribers can see any manager's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.