Alector (ALEC) Institutional Ownership

$2.34 -0.05 (-2.09%)

As of 08/28/2026 04:00 PM Eastern

Current Institutional Ownership Percentage: 85.83%
Number of Institutional Buyers (last 12 months): 63
Total Institutional Inflows (last 12 months): $90.81M

Number of Institutional Sellers (last 12 months): 21
Total Institutional Outflows (last 12 months): $8.92M

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ALEC Institutional Buying and Selling by Quarter

Alector Major Shareholders & Ownership History

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Reporting Date	Major Shareholder Name	Shares Held	Market Value	% of Portfolio	Quarterly Change in Shares	Ownership in Company
8/19/2026	Nantahala Capital Management LLC	4,318,109	$8.68M	0.0%	N/A	3.867%
8/18/2026	Public Employees Retirement System of Ohio	119,769	$241K	0.0%	N/A	0.107%
8/17/2026	Bank of America Corp DE	142,678	$287K	0.0%	N/A	0.128%
8/15/2026	Elmind Capital LP	900,000	$1.81M	0.0%	N/A	0.806%
8/14/2026	ADAR1 Capital Management LLC	2,883,583	$5.80M	0.3%	N/A	2.582%
8/14/2026	Hsbc Holdings PLC	48,523	$98K	0.0%	N/A	0.043%
8/14/2026	Canada Pension Plan Investment Board	131,300	$264K	0.0%	N/A	0.118%
8/14/2026	The Manufacturers Life Insurance Company	19,397	$39K	0.0%	N/A	0.017%
8/14/2026	Spruce Street Capital LP	2,101,068	$4.22M	0.0%	N/A	1.882%
8/12/2026	Ieq Capital LLC	60,570	$122K	0.0%	N/A	0.054%
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8/7/2026	Merck & Co. Inc.	3,545,719	$7.13M	0.0%	N/A	3.193%
8/7/2026	BlackRock Inc.	7,847,879	$15.77M	0.0%	N/A	7.068%
8/7/2026	Deutsche Bank AG	1,098,388	$2.21M	0.0%	N/A	0.989%
8/6/2026	Bank of New York Mellon Corp	250,093	$503K	0.0%	N/A	0.225%
5/19/2026	Bank of America Corp DE	380,908	$819K	0.0%	+183.2%	0.343%
5/18/2026	ADAR1 Capital Management LLC	1,050,000	$2.26M	0.1%	-5.2%	0.946%
5/18/2026	Eversept Partners LP	1,351,106	$2.91M	0.2%	+34.3%	1.217%
5/15/2026	Affinity Asset Advisors LLC	500,000	$1.08M	0.1%	N/A	0.450%
5/15/2026	Spruce Street Capital LP	2,101,068	$4.52M	1.1%	+87.9%	1.892%
5/14/2026	Renaissance Technologies LLC	1,287,691	$2.77M	0.0%	-16.6%	1.160%
5/14/2026	Sei Investments Co.	53,846	$116K	0.0%	+218.9%	0.048%
5/7/2026	Dimensional Fund Advisors LP	283,817	$610K	0.0%	+42.5%	0.256%
5/5/2026	Bank of New York Mellon Corp	252,297	$542K	0.0%	+15.8%	0.227%
4/25/2026	Strs Ohio	86,500	$186K	0.0%	-21.6%	0.078%
4/16/2026	Diversified Trust Co	25,895	$56K	0.0%	+83.6%	0.023%
2/23/2026	Virtu Financial LLC	21,886	$34K	0.0%	N/A	0.020%
2/19/2026	Invesco Ltd.	279,468	$436K	0.0%	+45.3%	0.256%
2/18/2026	Mackenzie Financial Corp	660,168	$1.00M	0.0%	+132.7%	0.605%
2/18/2026	XTX Topco Ltd	592,839	$925K	0.0%	+501.8%	0.543%
2/18/2026	Ikarian Capital LLC	2,082,606	$3.25M	0.3%	+174.0%	1.908%
2/18/2026	Utah Retirement Systems	133,718	$209K	0.0%	+85.7%	0.123%
2/18/2026	Vestal Point Capital LP	755,000	$1.18M	0.0%	-23.0%	0.692%
2/18/2026	Quadrature Capital Ltd	62,273	$97K	0.0%	N/A	0.057%
2/18/2026	Oxford Asset Management LLP	42,905	$67K	0.0%	N/A	0.039%
2/18/2026	Millennium Management LLC	1,332,914	$2.08M	0.0%	+15.4%	1.221%
2/18/2026	Man Group plc	86,162	$134K	0.0%	N/A	0.079%
2/18/2026	Elmind Capital LP	900,000	$1.40M	0.4%	N/A	0.825%
2/18/2026	Eversept Partners LP	1,006,163	$1.57M	0.1%	-32.4%	0.922%
2/18/2026	Balyasny Asset Management L.P.	3,265,575	$5.09M	0.0%	N/A	2.992%
2/18/2026	Boothbay Fund Management LLC	559,726	$873K	0.0%	+6.8%	0.513%
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2/18/2026	683 Capital Management LLC	3,350,000	$5.23M	0.2%	+235.0%	3.069%
2/17/2026	ADAR1 Capital Management LLC	1,108,000	$1.73M	0.1%	N/A	1.015%
2/17/2026	AQR Capital Management LLC	599,569	$935K	0.0%	+36.9%	0.549%
2/17/2026	Medici Capital LLC	1,500,520	$2.34M	1.9%	+211.3%	1.375%
2/17/2026	Price T Rowe Associates Inc. MD	56,203	$89K	0.0%	-97.4%	0.051%
2/17/2026	Public Employees Retirement System of Ohio	136,000	$212K	0.0%	+99.4%	0.125%
2/17/2026	Russell Investments Group Ltd.	71,887	$112K	0.0%	-31.4%	0.066%
2/17/2026	Graham Capital Management L.P.	104,851	$164K	0.0%	+394.2%	0.096%
2/17/2026	Foresite Capital Management IV LLC	3,887,200	$6.06M	2.6%	N/A	3.561%
2/16/2026	Squarepoint Ops LLC	77,618	$121K	0.0%	N/A	0.071%
2/16/2026	Spruce Street Capital LP	1,117,986	$1.74M	0.6%	N/A	1.024%
2/16/2026	Panagora Asset Management Inc.	850,298	$1.33M	0.0%	+14.7%	0.779%
2/16/2026	Barclays PLC	398,687	$622K	0.0%	-54.4%	0.365%
2/13/2026	Marshall Wace LLP	1,166,817	$1.82M	0.0%	+669.4%	1.069%
2/13/2026	The Manufacturers Life Insurance Company	28,829	$45K	0.0%	-86.7%	0.026%
2/13/2026	Jacobs Levy Equity Management Inc.	2,173,202	$3.39M	0.0%	+76.5%	1.991%
2/13/2026	Charles Schwab Investment Management Inc.	665,491	$1.04M	0.0%	-3.5%	0.610%
2/13/2026	State Street Corp	1,814,298	$2.83M	0.0%	+4.6%	1.662%
2/13/2026	Dynamic Technology Lab Private Ltd	25,881	$40K	0.0%	N/A	0.024%
2/13/2026	Wells Fargo & Company MN	90,108	$141K	0.0%	+71.9%	0.083%
2/12/2026	Renaissance Technologies LLC	1,543,650	$2.41M	0.0%	+62.6%	1.414%
2/12/2026	Dimensional Fund Advisors LP	199,126	$310K	0.0%	-32.7%	0.182%
2/12/2026	Jasper Ridge Partners L.P.	95,068	$148K	0.0%	+32.5%	0.087%
2/11/2026	Deutsche Bank AG	1,035,154	$1.62M	0.0%	-3.1%	0.948%
2/10/2026	Lexington Partners L.P.	53,488	$83K	0.0%	+429.2%	0.049%
2/10/2026	Hershey Trust Co.	20,572	$32K	0.0%	+100.0%	0.019%
2/10/2026	Goldman Sachs Group Inc.	437,959	$683K	0.0%	-28.2%	0.401%
2/9/2026	Geode Capital Management LLC	2,075,220	$3.24M	0.0%	+11.5%	1.901%
2/6/2026	Nano Cap New Millennium Growth Fund L P	200,000	$312K	0.3%	N/A	0.183%
2/3/2026	Bronte Capital Management Pty Ltd.	19,282	$30K	0.0%	N/A	0.018%
1/9/2026	SG Americas Securities LLC	27,002	$42K	0.0%	N/A	0.025%
1/1/2026	JPMorgan Chase & Co.	136,385	$404K	0.0%	+199.8%	0.125%
11/17/2025	Jasper Ridge Partners L.P.	71,776	$212K	0.0%	+134.3%	0.066%
11/17/2025	Jacobs Levy Equity Management Inc.	1,230,974	$3.64M	0.0%	-6.9%	1.128%
11/17/2025	Utah Retirement Systems	72,002	$213K	0.0%	+40.0%	0.066%
11/17/2025	Public Employees Retirement System of Ohio	68,200	$202K	0.0%	+763.3%	0.062%
11/17/2025	Millennium Management LLC	1,155,027	$3.42M	0.0%	+181.2%	1.058%
11/17/2025	MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	32,129	$95K	0.0%	-30.6%	0.029%
11/17/2025	Bank of America Corp DE	246,283	$729K	0.0%	-28.4%	0.226%
11/17/2025	Boothbay Fund Management LLC	524,077	$1.55M	0.0%	+14.2%	0.480%
11/17/2025	Ameriprise Financial Inc.	274,042	$811K	0.0%	+1,838.7%	0.251%
11/14/2025	Two Sigma Investments LP	307,179	$909K	0.0%	+38.3%	0.281%
11/13/2025	UBS Group AG	230,499	$682K	0.0%	+450.2%	0.211%
11/13/2025	Mackenzie Financial Corp	283,712	$840K	0.0%	+3.4%	0.260%
11/12/2025	Barclays PLC	873,375	$2.59M	0.0%	+414.4%	0.800%
11/12/2025	Dimensional Fund Advisors LP	295,846	$876K	0.0%	-22.8%	0.271%
11/10/2025	TD Asset Management Inc	273,738	$810K	0.0%	-58.0%	0.251%
11/10/2025	Persistent Asset Partners Ltd	31,240	$92K	0.1%	-48.9%	0.029%
11/7/2025	Vanguard Group Inc.	6,034,659	$17.86M	0.0%	+0.8%	5.963%
11/7/2025	JPMorgan Chase & Co.	136,385	$404K	0.0%	+199.8%	0.135%
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11/6/2025	Lexington Partners L.P.	10,108	$30K	0.0%	N/A	0.010%
11/6/2025	Rhumbline Advisers	114,270	$338K	0.0%	-9.7%	0.113%
11/5/2025	Savant Capital LLC	11,698	$35K	0.0%	N/A	0.012%
11/3/2025	Pinegrove Venture Partners LLC	10,286	$30K	0.1%	N/A	0.010%
10/29/2025	Wealth Enhancement Advisory Services LLC	11,970	$37K	0.0%	N/A	0.012%
10/27/2025	Belvedere Trading LLC	10,486	$31K	0.0%	N/A	0.010%
10/16/2025	HBK Sorce Advisory LLC	11,171	$34K	0.0%	N/A	0.011%
10/15/2025	Vontobel Holding Ltd.	26,000	$77K	0.0%	-31.6%	0.026%
10/14/2025	HBK Sorce Advisory LLC	11,171	$34K	0.0%	N/A	0.011%
10/9/2025	Voya Investment Management LLC	13,929	$41K	0.0%	-43.4%	0.014%

ALEC Institutional Ownership - Frequently Asked Questions

During the previous two years, 136 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 119 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 48,355,436 shares in the last 24 months. This purchase volume represents approximately $90.81M in transactions.

Of the 21 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 4,929,406 shares in the last 24 months. This volume of shares sold represents approximately $8.92M in transactions.

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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 8/19/2026. New 13F filings are added each quarter as they're published.

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Alector (ALEC) Institutional Ownership

ALEC Institutional Buying and Selling by Quarter

Alector Major Shareholders & Ownership History

ALEC Institutional Ownership - Frequently Asked Questions

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Alector (ALEC) Institutional Ownership

Institutional Ownership Changes (13F Filings) for Alector (NASDAQ:ALEC)

ALEC Institutional Buying and Selling by Quarter

Alector Major Shareholders & Ownership History

ALEC Institutional Ownership - Frequently Asked Questions

Who are the largest shareholders of ALEC shares?

What percentage of Alector's stock is owned by institutional investors?

Which institutional investors have been buying Alector's stock?

How much institutional buying is happening at Alector?

Which of Alector's major shareholders have been selling company stock?

How much institutional selling is happening at Alector?

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