Alector
ALEC · NASDAQ
$1.97+$0.02 (+1.03%)TodayMarket closed ·
Prev close $1.95
Who owns ALEC
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 45.6% of ALEC’s shares.
- TCG Crossover Management, LLC9.0%
- BlackRock Institutional Trust Company, N.A.6.1%
- Rosenthal (Arnon)5.1%
- Polaris Venture Partners4.4%
- Next 6 largest institutions21.0%
- All other shareholders54.4%
| Holder | Shares | % of shares |
|---|---|---|
| TCG Crossover Management, LLC | 10.00M | 9.01% |
| BlackRock Institutional Trust Company, N.A. | 6.83M | 6.15% |
| Rosenthal (Arnon) | 5.63M | 5.07% |
| Polaris Venture Partners | 4.85M | 4.37% |
| Acadian Asset Management LLC | 4.41M | 3.98% |
| Nantahala Capital Management, LLC | 4.32M | 3.89% |
| Vanguard Capital Management, LLC | 4.01M | 3.61% |
| Kynam Capital Management LP | 3.81M | 3.43% |
| Merck & Co Inc | 3.55M | 3.19% |
| Balyasny Asset Management LP | 3.25M | 2.92% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 2.84M | 2.56% |
| iShares Russell 2000 ETF | 2.54M | 2.29% |
| Fidelity Select Biotechnology Portfolio | 1.38M | 1.24% |
| Vanguard Extended Market Index Fund | 1.07M | 0.97% |
| Fidelity Small Cap Index Fund | 1.07M | 0.96% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders sold $524.31K (9 trades) of ALEC on the open market, with no buys.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Rosenthal Arnon | Award | 978.75K | — |
| Rosenthal Arnon | Award | 217.50K | — |
| Berkley Neil Lindsay | Award | 190.00K | — |
| Berkley Neil Lindsay | Award | 44.57K | — |
| Wong-Sarad Grace | Award | 83.44K | — |
| Wong-Sarad Grace | Award | 55.55K | — |
| Rosenthal Arnon | Award | 132.50K | — |
| Rosenthal Arnon | Other | 132.50K | — |
| Rosenthal Arnon | Award | 119.45K | — |
| Rosenthal Arnon | Other | 119.45K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 6.15M
- Days to cover
- 5.73
- % of shares outstanding
- 5.54%
- Average daily volume
- 1.07M
- Change since last report
- +0.7%
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