Latest Period
Q1 2026
Security Snapshot
LB PHARMACEUTICALS INC - Common Stock, par value $0.0001 per share (LBRX) Institutional Ownership
CUSIP: 50180M108
13F Institutional Holders and Ownership History from Q3 2025 to Q1 2026
Institutions Reporting
77
Shares (Excl. Options)
28,209,904
Price
$24.66
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- Security type / class
- Equity / Common Stock, par value $0.0001 per share
- Symbol
- LBRX on Nasdaq
- Shares outstanding
- 28,742,016
- Reported price per share
- $31.83
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 28,209,904
- Total reported value
- $692,418,818
- Portfolio coverage rank
- 0%
- Share change
- +3,359,941
- Value change
- +$82,664,759
- Number of holders
- 77
Security identity
Issuer context
Latest holder snapshot
Reported Shares, Excluding Options vs Price
Reported Value, Excluding Options
Total Investors
Key facts
- LBRX - LB PHARMACEUTICALS INC - Common Stock, par value $0.0001 per share is tracked under CUSIP 50180M108.
- 77 institutions reported positions in Q1 2026.
- 10 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 67 to 77 between Q4 2025 and Q1 2026.
- Reported value moved from $551,818,582 to $692,418,818.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC Evidence
Latest holder context comes from 77 institutions filings for Q1 2026.
Security key
50180M108
Latest holder period
Q1 2026
13F holders
77
13D/G owners
10
CIK / CUSIP context first
Open Q1 2026 holders
LBRX full holder history
LB PHARMACEUTICALS INC SEC filings
LB PHARMACEUTICALS INC company facts
LB PHARMACEUTICALS INC insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 50180M108:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
10
Security
LBRX
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| Deep Track Capital, LP | 15% | 3,352,804 | Deep Track Capital, LP | 12 Sep 2025 | ||||
| RA CAPITAL MANAGEMENT, L.P. | 8.7% | +15% | $42,029,734 | +$10,154,484 | 2,208,604 | +32% | RA Capital Management, L.P. | 31 Dec 2025 |
| Commodore Capital LP | 6.8% | +22% | $48,007,461 | +$18,190,961 | 1,972,369 | +61% | Commodore Capital LP | 31 Mar 2026 |
| TCG Crossover GP II, LLC | 6.4% | -18% | $44,773,162 | +$2,299,497 | 1,839,489 | +5.4% | TCG Crossover GP II, LLC | 31 Mar 2026 |
| Caligan Partners LP | 5% | $35,002,624 | 1,438,070 | Caligan Partners LP | 31 Mar 2026 | |||
| JPMORGAN CHASE & CO | 4.9% | -23% | $34,747,005 | -$4,476,467 | 1,427,568 | -11% | JPMORGAN CHASE & CO | 31 Mar 2026 |
| Pontifax Management 4 G.P. (2015) Ltd. | 6.3% | 1,411,681 | Pontifax Management 4 G.P. (2015) Ltd. | 12 Sep 2025 | ||||
| BlackRock, Inc. | 5.1% | $28,437,799 | 1,277,776 | BlackRock, Inc. | 31 Dec 2025 | |||
| Trails Edge Capital Partners, LP | 5% | $20,964,420 | 1,268,265 | Trails Edge Capital Partners, LP | 24 Dec 2025 | |||
| BlackRock Portfolio Management LLC | 3.8% | -35% | $21,391,244 | -$308,063 | 961,158 | -1.4% | BlackRock Portfolio Management LLC | 31 Dec 2025 |
As of 31 Mar 2026, 77 institutional investors reported holding 28,209,904 shares of LB PHARMACEUTICALS INC - Common Stock, par value $0.0001 per share (LBRX). This represents 98% of the company’s total 28,742,016 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
91%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| Deep Track Capital, LP | 12% | 3,352,804 | 0% | 1.7% | $82,680,147 |
| BlackRock, Inc. | 8.6% | 2,470,845 | +10% | 0% | $60,931,038 |
| RA CAPITAL MANAGEMENT, L.P. | 7.7% | 2,208,604 | 0% | 0.58% | $54,464,175 |
| TCG Crossover Management, LLC | 6.4% | 1,839,489 | +5.4% | 1.3% | $45,279,611 |
| Commodore Capital LP | 5.2% | 1,500,000 | 0% | 2.1% | $36,990,000 |
| Caligan Partners LP | 5% | 1,438,070 | 2.4% | $34,628,726 | |
| JPMORGAN CHASE & CO | 5% | 1,427,568 | -11% | 0% | $33,190,956 |
| Spruce Street Capital LP | 4.8% | 1,376,159 | +37% | 8.1% | $33,644,866 |
| Trails Edge Capital Partners, LP | 4.6% | 1,319,362 | -5.5% | 7.7% | $32,535,467 |
| Nantahala Capital Management, LLC | 3.7% | 1,052,894 | +56% | 1.6% | $25,964,366 |
| Balyasny Asset Management L.P. | 3.2% | 923,694 | +3% | 0.04% | $22,778,294 |
| Logos Global Management LP | 3.2% | 915,000 | -24% | 1.2% | $22,563,900 |
| VANGUARD CAPITAL MANAGEMENT LLC | 3.1% | 894,653 | 0% | 0% | $22,062,143 |
| Alyeska Investment Group, L.P. | 3% | 863,947 | +28% | 0.06% | $21,283,499 |
| Vivo Capital, LLC | 2.8% | 800,000 | 0% | 1.6% | $19,728,000 |
| Nan Fung Group Holdings Ltd | 2.2% | 630,657 | +110% | 13% | $15,552,002 |
| JENNISON ASSOCIATES LLC | 1.9% | 538,216 | -35% | 0.01% | $13,272,406 |
| GEODE CAPITAL MANAGEMENT, LLC | 1.8% | 518,228 | +17% | 0% | $12,783,099 |
| STATE STREET CORP | 1.8% | 504,373 | +102% | 0% | $12,437,838 |
| CITADEL ADVISORS LLC | 1.5% | 416,906 | +2.3% | 0.01% | $10,280,902 |
| GOLDMAN SACHS GROUP INC | 1.3% | 363,799 | +20% | 0% | $8,971,283 |
| GREAT POINT PARTNERS LLC | 1% | 300,000 | 1.8% | $7,398,000 | |
| FMR LLC | 0.77% | 222,508 | +0.29% | 0% | $5,487,057 |
| BAKER BROS. ADVISORS LP | 0.7% | 200,000 | 0% | 0.03% | $4,932,000 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 0.65% | 186,095 | +4.8% | 0% | $4,589,103 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
3
Latest
Q1 2026