LB Pharmaceuticals Inc: which funds bought and sold

Institutions that bought and sold LB Pharmaceuticals shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 83 institutions that filed 13F reports for both quarters added to or opened positions in LB Pharmaceuticals, and 16 cut or closed them. Together they added a net 2.6M shares, +9.3% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 1.1M shares (+7.7%); index fund managers were net buyers of 629K shares (+12.5%). 41 opened a new position and 3 sold out entirely.

Bought, Q2 2026 83 institutions, 41 of them new holders Sold, Q2 2026 16 institutions, 3 of them sold out

Net change, all compared +2.6M shares (+9.3%)

Net change, active managers +1.1M shares (+7.7%), 13 bought, 7 sold

Buyers versus sellers

institutions compared, 116

83 bought 17 16 sold

Active managers and hedge funds 13 bought · 7 sold · +1.1M

Index fund managers 9 bought · 0 sold · +629K

Other institutions 61 bought · 9 sold · +897K

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Nantahala Capital Management, LLC Hedge fund	+1.1M +100.0%	2.1M	$68.3M
Boothbay Fund Management, LLC Hedge fund	+276K New position	276K	$8.9M
Blackrock, Inc. Index funds	+263K +10.7%	2.7M	$88.7M
Goldman Sachs Group Inc	+213K +58.5%	576K	$18.7M
Trails Edge Capital Partners, LP	+204K +15.4%	1.5M	$49.4M
Millennium Management LLC Hedge fund	+122K +89.3%	259K	$8.4M
Ameriprise Financial Inc	+119K +110.0%	227K	$7.4M
State Street Corp Index funds	+98K +19.4%	602K	$19.5M
Geode Capital Management, LLC Index funds	+95K +18.2%	613K	$19.9M
Raymond James Financial Inc	+92K New position	92K	$3M
Eversept Partners, LP Hedge fund	+83K +83.3%	184K	$6M
Longbow Finance SA	+82K New position	82K	$2.7M
BNP Paribas Financial Markets	+82K +2031.6%	86K	$2.8M
Vanguard Capital Management LLC Index funds	+77K +8.6%	971K	$31.5M
Jpmorgan Chase & Co	+70K +4.9%	1.5M	$48.9M
Nextbio Capital Management LP	+68K New position	68K	$2.2M
Alerus Financial Na	+55K New position	55K	$1.8M
Xtx Topco Ltd	+47K New position	47K	$1.5M
Vanguard Portfolio Management LLC Index funds	+40K +35.3%	152K	$4.9M
Y-Intercept (Hong Kong) Ltd	+39K New position	39K	$1.3M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Nantahala Capital Management, LLC Hedge fund	+1.1M +100.0%	2.1M	$68.3M
Boothbay Fund Management, LLC Hedge fund	+276K New position	276K	$8.9M
Millennium Management LLC Hedge fund	+122K +89.3%	259K	$8.4M
Eversept Partners, LP Hedge fund	+83K +83.3%	184K	$6M
Two Sigma Investments, LP Hedge fund	+36K +282.5%	49K	$1.6M
Alliancebernstein L.P. Active manager	+28K New position	28K	$680,616
American Century Companies Inc Active manager	+23K New position	23K	$744,031
Quadrature Capital Ltd Hedge fund	+14K +141.2%	24K	$777,460
D. E. Shaw & Co., Inc. Hedge fund	+14K New position	14K	$438,727
Wellington Management Group LLP Active manager	+6,251 +11.9%	59K	$1.9M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Tcg Crossover Management, LLC	−392K −21.3%	1.4M	$47M
Logos Global Management LP Hedge fund	−330K −36.1%	585K	$19M
Citadel Advisors LLC Hedge fund	−201K −48.2%	216K	$7M
Stempoint Capital LP	−68K −68.2%	32K	$1M
UBS Group AG	−52K −37.7%	86K	$2.8M
Russell Investments Group, Ltd.	−38K −52.7%	34K	$1.1M
FMR LLC Active manager	−34K −15.1%	189K	$6.1M
Opaleye Management Inc.	−15K Sold out	0	—
Soleus Capital Management, L.P. Hedge fund	−10K Sold out	0	—
Strs Ohio	−5,100 Sold out	0	—
Calamos Advisors LLC Active manager	−4,865 −20.2%	19K	$623,071
Federated Hermes, Inc. Active manager	−2,500 −50.0%	2,500	$81,138
Balyasny Asset Management L.P. Hedge fund	−2,223 −0.2%	921K	$29.9M
Tower Research Capital LLC (TRC)	−899 −54.1%	762	$24,731
Focus Partners Wealth	−242 −1.2%	20K	$635,241
Sterling Capital Management LLC	−94 −25.5%	274	$8,893

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Logos Global Management LP Hedge fund	−330K −36.1%	585K	$19M
Citadel Advisors LLC Hedge fund	−201K −48.2%	216K	$7M
FMR LLC Active manager	−34K −15.1%	189K	$6.1M
Soleus Capital Management, L.P. Hedge fund	−10K Sold out	0	—
Calamos Advisors LLC Active manager	−4,865 −20.2%	19K	$623,071
Federated Hermes, Inc. Active manager	−2,500 −50.0%	2,500	$81,138
Balyasny Asset Management L.P. Hedge fund	−2,223 −0.2%	921K	$29.9M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Boothbay Fund Management, LLCHedge fund	276K	$8.9M
Raymond James Financial Inc	92K	$3M
Longbow Finance SA	82K	$2.7M
Nextbio Capital Management LP	68K	$2.2M
Alerus Financial Na	55K	$1.8M
Xtx Topco Ltd	47K	$1.5M
Y-Intercept (Hong Kong) Ltd	39K	$1.3M
Great Lakes Advisors, LLC	30K	$986,957
Swiss National Bank	30K	$980,141
Alps Advisors Inc	29K	$944,505

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Opaleye Management Inc.	15K	$357,718
Soleus Capital Management, L.P.Hedge fund	10K	$246,600
Strs Ohio	5,100	$125,766

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 115
Ten largest holders: 62.3%
Index fund managers: 18.3%
Active managers and hedge funds: 49.2%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	13	7	5	1	+1.1M	+7.7%
Index fund managers	9	0	0	0	+629K	+12.5%
Other institutions	61	9	36	2	+897K	+9.8%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on LB Pharmaceuticals.

Only managers that filed a holdings report for both quarters are compared (116 here). 4 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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