ALEC Institutional Ownership
Who owns Alector, Inc. and what the big funds did with it last quarter, from every SEC 13F filing. 141 funds reported holding ALEC at Jun 30, 2026, together owning 85.8% of the company.
- ▲73 buying vs 44 selling
- ▲Held by funds +6.7 pts
- ▲Funds holding +3
- ●Superinvestors: 2 added, 2 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 141 | 138 | +2.2% |
| In funds' top 10 | 3 | 4 | −25.0% |
| 13F shares | 95.9M | 88.4M | +8.4% |
| Held by funds | 85.8% | 79.2% | +6.7 pts |
| New positions | 14 | 25 | −44.0% |
| Increased | 59 | 43 | +37.2% |
| Reduced | 35 | 37 | −5.4% |
| Sold out | 9 | 20 | −55.0% |
| Calls (shares) | 504K | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | 0.00 | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in ALEC
All superinvestors →
Who owns ALEC
share of fund held shares- Index and passive funds22.6%
- Active managers and hedge funds73.8%
- Banks and brokers3.1%
- Pensions, insurers and other0.5%
The top 10 holders own 53.9% of all ALEC shares that funds reported. Groups are our own grouping of filers by name.
Put/call ratio
funds' options, market makers left outAbove 1 means funds hold more puts than calls, a sign of hedging or bets on a fall. Options are valued at the underlying shares.
Filed so far for Q3 2026
25 funds changed their position- Mackenzie Financial CorpAdded+351K sh
- Strs OhioAdded+38K sh
- Vontobel Holding Ltd.Sold out−30K sh
- Wealth Enhancement Advisory Services, LLCSold out−30K sh
- Creative PlanningSold out−15K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | TCG Crossover Management, LLC | 8.96% | 10M | $20.1M | 0 |
| 2 | Nantahala Capital Management, LLC | 7.73% | 8.6M | $17.4M | +5.8M |
| 3 | BlackRock, Inc. | 7.03% | 7.8M | $15.8M | +107K |
| 4 | Acadian Asset Management LLC | 3.95% | 4.4M | $8.9M | +376K |
| 5 | Vanguard Capital Management LLC | 3.59% | 4M | $8.1M | +331K |
| 6 | Kynam Capital Management, LP | 3.41% | 3.8M | $7.7M | +1.8M |
| 7 | Merck & Co., Inc. | 3.18% | 3.5M | $7.1M | 0 |
| 8 | Balyasny Asset Management L.P. | 2.91% | 3.2M | $6.5M | +312K |
| 9 | 683 Capital Management, LLC | 2.87% | 3.2M | $6.4M | 0 |
| 10 | D. E. Shaw & Co., Inc. | 2.65% | 3M | $5.9M | −373K |
- Nantahala Capital Management, LLC+5.8M sh+$11.7M
- ADAR1 Capital Management, LLC+1.8M sh+$3.7M
- Kynam Capital Management, LP+1.8M sh+$3.6M
- Affinity Asset Advisors, LLC+1M sh+$2M
- AQR Capital Management LLC+598K sh+$1.2M
- Cantor Fitzgerald, L. P.+591K sh+$1.2M
- Acadian Asset Management LLC+376K sh+$754K
- Vanguard Capital Management LLC+331K sh+$665K
- Foresite Capital Management IV, LLC−3.9M sh−$8.4M
- Jane Street Group, LLC−399K sh−$859K
- Fmr LLC−400K sh−$803K
- Jacobs Levy Equity Management, Inc−388K sh−$781K
- D. E. Shaw & Co., Inc.−373K sh−$749K
- Renaissance Technologies LLC−353K sh−$709K
- Dimensional Fund Advisors LP−250K sh−$504K
- Morgan Stanley−244K sh−$491K
ALEC institutional ownership FAQ
Who owns the most ALEC stock?
In Q2 2026 13F filings the largest holder of ALEC was TCG Crossover Management, LLC, followed by Nantahala Capital Management, LLC and BlackRock, Inc.. Index fund managers are usually the biggest holders of large companies.
What percentage of ALEC is owned by institutions?
Funds that file 13F reports held 85.8% of ALEC's shares at Jun 30, 2026, compared with 79.2% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying ALEC?
In Q2 2026, 73 funds bought ALEC (14 of them new positions) and 44 sold (9 sold out completely). Among well known investors, 2 added and 2 cut. Our fund sentiment for ALEC is bullish.
What is ALEC's institutional put/call ratio?
Funds reported $0 of ALEC puts against $1M of calls, a put/call ratio of 0.00. Market makers and bank trading desks are left out, since their options are mostly hedges.
How current is this ALEC ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.