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Alector (ALEC) Institutional Ownership

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$2.29 +0.20 (+9.57%)
Closing price 11/6/2026 04:00 PM Eastern
Extended Trading
$2.28 -0.02 (-0.66%)
As of 11/6/2026 07:30 PM Eastern
Extended trading is trading that happens on electronic markets outside of regular trading hours. This is a fair market value extended hours price provided by Massive. Learn more.
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Institutional Ownership Changes (13F Filings) for Alector (NASDAQ:ALEC)

Current
Institutional Ownership
Percentage
85.83%
Number of
Institutional Buyers
(last 12 months)
57
Total
Institutional Inflows
(last 12 months)
$90.15M
Number of
Institutional Sellers
(last 12 months)
18
Total
Institutional Outflows
(last 12 months)
$8.81M
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ALEC Institutional Buying and Selling by Quarter

Alector Major Shareholders & Ownership History

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Reporting DateMajor Shareholder NameShares HeldMarket Value% of PortfolioQuarterly Change in SharesOwnership in CompanyDetails
11/6/2026 Russell Investments Group Ltd.106,614$197K0.0%+8.2%0.095%
8/19/2026Nantahala Capital Management LLC4,318,109$8.68M0.0%N/A3.867%
8/18/2026Public Employees Retirement System of Ohio119,769$241K0.0%N/A0.107%
8/17/2026Bank of America Corp DE142,678$287K0.0%N/A0.128%
8/15/2026Elmind Capital LP900,000$1.81M0.0%N/A0.806%
8/14/2026ADAR1 Capital Management LLC2,883,583$5.80M0.3%N/A2.582%
8/14/2026Hsbc Holdings PLC48,523$98K0.0%N/A0.043%
8/14/2026Canada Pension Plan Investment Board131,300$264K0.0%N/A0.118%
8/14/2026The Manufacturers Life Insurance Company19,397$39K0.0%N/A0.017%
8/14/2026Spruce Street Capital LP2,101,068$4.22M0.0%N/A1.882%
8/12/2026Ieq Capital LLC60,570$122K0.0%N/A0.054%
8/7/2026Merck & Co. Inc.3,545,719$7.13M0.0%N/A3.193%
8/7/2026BlackRock Inc.7,847,879$15.77M0.0%N/A7.068%
8/7/2026 Deutsche Bank AG1,098,388$2.21M0.0%N/A0.989%
8/6/2026 Bank of New York Mellon Corp250,093$503K0.0%N/A0.225%
5/19/2026Bank of America Corp DE380,908$819K0.0%+183.2%0.343%
5/18/2026ADAR1 Capital Management LLC1,050,000$2.26M0.1%-5.2%0.946%
5/18/2026Eversept Partners LP1,351,106$2.91M0.2%+34.3%1.217%
5/15/2026Affinity Asset Advisors LLC500,000$1.08M0.1%N/A0.450%
5/15/2026Spruce Street Capital LP2,101,068$4.52M1.1%+87.9%1.892%
5/14/2026Renaissance Technologies LLC1,287,691$2.77M0.0%-16.6%1.160%
5/14/2026Sei Investments Co.53,846$116K0.0%+218.9%0.048%
5/7/2026 Dimensional Fund Advisors LP283,817$610K0.0%+42.5%0.256%
5/5/2026 Bank of New York Mellon Corp252,297$542K0.0%+15.8%0.227%
4/25/2026 Strs Ohio86,500$186K0.0%-21.6%0.078%
4/16/2026 Diversified Trust Co25,895$56K0.0%+83.6%0.023%
2/23/2026Virtu Financial LLC21,886$34K0.0%N/A0.020%
2/19/2026Invesco Ltd.279,468$436K0.0%+45.3%0.256%
2/18/2026 Mackenzie Financial Corp660,168$1.00M0.0%+132.7%0.605%
2/18/2026XTX Topco Ltd592,839$925K0.0%+501.8%0.543%
2/18/2026Ikarian Capital LLC2,082,606$3.25M0.3%+174.0%1.908%
2/18/2026Utah Retirement Systems133,718$209K0.0%+85.7%0.123%
2/18/2026Vestal Point Capital LP755,000$1.18M0.0%-23.0%0.692%
2/18/2026Quadrature Capital Ltd62,273$97K0.0%N/A0.057%
2/18/2026Oxford Asset Management LLP42,905$67K0.0%N/A0.039%
2/18/2026Millennium Management LLC1,332,914$2.08M0.0%+15.4%1.221%
2/18/2026Man Group plc86,162$134K0.0%N/A0.079%
2/18/2026Elmind Capital LP900,000$1.40M0.4%N/A0.825%
2/18/2026Eversept Partners LP1,006,163$1.57M0.1%-32.4%0.922%
2/18/2026Balyasny Asset Management L.P.3,265,575$5.09M0.0%N/A2.992%
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2/18/2026Boothbay Fund Management LLC559,726$873K0.0%+6.8%0.513%
2/18/2026683 Capital Management LLC3,350,000$5.23M0.2%+235.0%3.069%
2/17/2026ADAR1 Capital Management LLC1,108,000$1.73M0.1%N/A1.015%
2/17/2026AQR Capital Management LLC599,569$935K0.0%+36.9%0.549%
2/17/2026Medici Capital LLC1,500,520$2.34M1.9%+211.3%1.375%
2/17/2026Price T Rowe Associates Inc. MD56,203$89K0.0%-97.4%0.051%
2/17/2026Public Employees Retirement System of Ohio136,000$212K0.0%+99.4%0.125%
2/17/2026 Russell Investments Group Ltd.71,887$112K0.0%-31.4%0.066%
2/17/2026Graham Capital Management L.P.104,851$164K0.0%+394.2%0.096%
2/17/2026Foresite Capital Management IV LLC3,887,200$6.06M2.6%N/A3.561%
2/16/2026Squarepoint Ops LLC77,618$121K0.0%N/A0.071%
2/16/2026Spruce Street Capital LP1,117,986$1.74M0.6%N/A1.024%
2/16/2026Panagora Asset Management Inc.850,298$1.33M0.0%+14.7%0.779%
2/16/2026 Barclays PLC398,687$622K0.0%-54.4%0.365%
2/13/2026Marshall Wace LLP1,166,817$1.82M0.0%+669.4%1.069%
2/13/2026The Manufacturers Life Insurance Company 28,829$45K0.0%-86.7%0.026%
2/13/2026Jacobs Levy Equity Management Inc.2,173,202$3.39M0.0%+76.5%1.991%
2/13/2026Charles Schwab Investment Management Inc.665,491$1.04M0.0%-3.5%0.610%
2/13/2026State Street Corp1,814,298$2.83M0.0%+4.6%1.662%
2/13/2026Dynamic Technology Lab Private Ltd25,881$40K0.0%N/A0.024%
2/13/2026Wells Fargo & Company MN90,108$141K0.0%+71.9%0.083%
2/12/2026Renaissance Technologies LLC1,543,650$2.41M0.0%+62.6%1.414%
2/12/2026 Dimensional Fund Advisors LP199,126$310K0.0%-32.7%0.182%
2/12/2026Jasper Ridge Partners L.P.95,068$148K0.0%+32.5%0.087%
2/11/2026 Deutsche Bank AG1,035,154$1.62M0.0%-3.1%0.948%
2/10/2026 Lexington Partners L.P.53,488$83K0.0%+429.2%0.049%
2/10/2026Hershey Trust Co.20,572$32K0.0%+100.0%0.019%
2/10/2026Goldman Sachs Group Inc.437,959$683K0.0%-28.2%0.401%
2/9/2026 Geode Capital Management LLC2,075,220$3.24M0.0%+11.5%1.901%
2/6/2026Nano Cap New Millennium Growth Fund L P200,000$312K0.3%N/A0.183%
2/3/2026Bronte Capital Management Pty Ltd.19,282$30K0.0%N/A0.018%
1/9/2026SG Americas Securities LLC27,002$42K0.0%N/A0.025%
1/1/2026JPMorgan Chase & Co.136,385$404K0.0%+199.8%0.125%
11/17/2025Jasper Ridge Partners L.P.71,776$212K0.0%+134.3%0.066%
11/17/2025Jacobs Levy Equity Management Inc.1,230,974$3.64M0.0%-6.9%1.128%
11/17/2025Utah Retirement Systems72,002$213K0.0%+40.0%0.066%
11/17/2025Public Employees Retirement System of Ohio68,200$202K0.0%+763.3%0.062%
11/17/2025Millennium Management LLC1,155,027$3.42M0.0%+181.2%1.058%
11/17/2025MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.32,129$95K0.0%-30.6%0.029%
11/17/2025Bank of America Corp DE246,283$729K0.0%-28.4%0.226%
11/17/2025Boothbay Fund Management LLC524,077$1.55M0.0%+14.2%0.480%
11/17/2025Ameriprise Financial Inc.274,042$811K0.0%+1,838.7%0.251%
11/14/2025Two Sigma Investments LP307,179$909K0.0%+38.3%0.281%
11/13/2025UBS Group AG230,499$682K0.0%+450.2%0.211%
11/13/2025 Mackenzie Financial Corp283,712$840K0.0%+3.4%0.260%
11/12/2025 Barclays PLC873,375$2.59M0.0%+414.4%0.800%
11/12/2025 Dimensional Fund Advisors LP295,846$876K0.0%-22.8%0.271%
11/10/2025TD Asset Management Inc273,738$810K0.0%-58.0%0.251%
11/10/2025Persistent Asset Partners Ltd31,240$92K0.1%-48.9%0.029%
11/7/2025Vanguard Group Inc.6,034,659$17.86M0.0%+0.8%5.963%
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11/7/2025JPMorgan Chase & Co.136,385$404K0.0%+199.8%0.135%
11/6/2025 Lexington Partners L.P.10,108$30K0.0%N/A0.010%
11/6/2025Rhumbline Advisers114,270$338K0.0%-9.7%0.113%
11/5/2025 Savant Capital LLC11,698$35K0.0%N/A0.012%
11/3/2025 Pinegrove Venture Partners LLC10,286$30K0.1%N/A0.010%
10/29/2025 Wealth Enhancement Advisory Services LLC11,970$37K0.0%N/A0.012%
10/27/2025 Belvedere Trading LLC10,486$31K0.0%N/A0.010%
10/16/2025 HBK Sorce Advisory LLC11,171$34K0.0%N/A0.011%
10/15/2025 Vontobel Holding Ltd.26,000$77K0.0%-31.6%0.026%
10/14/2025 HBK Sorce Advisory LLC11,171$34K0.0%N/A0.011%


ALEC Institutional Ownership - Frequently Asked Questions

During the previous two years, 128 institutional investors and hedge funds held shares of Alector. The most heavily invested institutionals were FMR LLC ($68.01M), RA Capital Management L.P. ($18.32M), Vanguard Group Inc. ($17.86M), BlackRock Inc. ($15.77M), Braidwell LP ($10.06M), Nantahala Capital Management LLC ($8.68M), and Merck & Co. Inc. ($7.13M).Learn more on Alector's institutional investors.

85.83% of Alector's stock is owned by institutional investors. Learn more on ALEC's institutional investor holdings.

Of the 114 institutional investors that purchased Alector's stock in the last 24 months, the following investors and hedge funds have bought the highest volume of shares: RA Capital Management L.P. ($9.70M), BlackRock Inc. ($7.85M), Nantahala Capital Management LLC ($4.32M), Spruce Street Capital LP ($4.20M), ADAR1 Capital Management LLC ($4.00M), Foresite Capital Management IV LLC ($3.89M), and Merck & Co. Inc. ($3.55M).

Institutional investors have bought a total of 48,134,413 shares in the last 24 months. This purchase volume represents approximately $90.15M in transactions.

Of the 18 institutional investors that sold Alector's stock in the last 24 months, the following investors and hedge funds have sold the highest volume of shares: Price T Rowe Associates Inc. MD ($2.13M), Eversept Partners LP ($482.56K), Barclays PLC ($474.69K), TD Asset Management Inc ($378K), Renaissance Technologies LLC ($255.96K), Vestal Point Capital LP ($225K), and The Manufacturers Life Insurance Company ($187.75K).

Institutional investors have sold a total of 4,894,416 shares in the last 24 months. This volume of shares sold represents approximately $8.81M in transactions.


Related Companies

Institutional ownership data for NASDAQ:ALEC is compiled from quarterly 13F filings submitted to the U.S. Securities and Exchange Commission (SEC), with the most recent received on 11/6/2026. New 13F filings are added each quarter as they're published.
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