LB Pharmaceuticals
LBRX · NASDAQ
$41.00+$2.19 (+5.64%)TodayMarket closed ·
Prev close $38.81
Who owns LBRX
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 59.3% of LBRX’s shares.
- Deep Track Capital LP11.7%
- RA Capital Management, LP7.7%
- BlackRock Institutional Trust Company, N.A.5.8%
- Trails Edge Capital Partners LP5.3%
- Next 6 largest institutions28.8%
- All other shareholders40.7%
| Holder | Shares | % of shares |
|---|---|---|
| Deep Track Capital LP | 3.35M | 11.69% |
| RA Capital Management, LP | 2.21M | 7.70% |
| BlackRock Institutional Trust Company, N.A. | 1.66M | 5.80% |
| Trails Edge Capital Partners LP | 1.52M | 5.31% |
| Commodore Capital LP | 1.50M | 5.23% |
| TCG Crossover Management, LLC | 1.45M | 5.05% |
| Caligan Partners, LP | 1.44M | 5.01% |
| Pontifax Venture Capital | 1.41M | 4.92% |
| Spruce Street Capital LP | 1.38M | 4.80% |
| JP Morgan Asset Management | 1.10M | 3.83% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 684.01K | 2.38% |
| JPMorgan Small Cap Growth Fund | 579.84K | 2.02% |
| iShares Russell 2000 ETF | 579.23K | 2.02% |
| BlackRock Health Sciences Opportunities Portfolio | 567.63K | 1.98% |
| JPM Global Healthcare | 464.63K | 1.62% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $10.00M (1 trade) of LBRX on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Kozauer Susan Gani | Award | 200.00K | — |
| Miller Joseph M | Award | 200.00K | — |
| Deep Track Biotechnology Master Fund, Ltd. | Buy | 286.20K | $10.00M |
| Luse Rebecca | Award | 10.00K | — |
| Lenz Robert A. | Award | 12.50K | — |
| Kane William P Jr | Award | 10.00K | — |
| Hemrajani Rekha | Award | 10.00K | — |
| Nussbaum Ran | Award | 10.00K | — |
| Garland J. Scott | Award | 10.00K | — |
| RUFFOLO ROBERT R | Award | 10.00K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 6.01M
- Days to cover
- 14.51
- % of shares outstanding
- 20.96%
- Average daily volume
- 414.30K
- Change since last report
- +7.0%
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