Alector, Inc.

ALEC

Exchange: Nasdaq
Industry: Biological Products, (No Diagnostic Substances)
SEC CIK: 0001653087

SEC filings (opens in a new tab)

In the last 90 days, Alector, Inc. insiders filed 0 open-market purchases and 3 sales; 140 institutions reported holding it in 13F filings for Q2 2026, worth $183.4M in total; no superinvestor holds it.

Q1 2026 vs. Q4 2025

How the institutions holding Alector, Inc. changed between Q4 2025 and Q1 2026.

All holders in Q1 2026 All holders in Q4 2025

13F holders of ALEC: Q4 2025 compared with Q1 2026
Measure	Q4 2025	Of which not filed for Q1 2026	Q1 2026	Change
Holders	131	2	138	+9
Shares	84.4M	6.91M	88.4M	+10.9M (+14.0%)
Value	$131.5M	$10.8M	$190.0M	+$69.2M (+57.3%)

2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.

New holders (29)

Institutions that held Alector, Inc. at the end of Q1 2026 but not at the end of Q4 2025.

Institutions new to ALEC in Q1 2026
Institution	Shares	Value	% of portfolio
Vanguard Capital Management LLC	3,678,722	$7.91M	0.00%
Nantahala Capital Management, LLC	2,815,983	$6.05M	0.38%
Vanguard Portfolio Management LLC	2,583,542	$5.55M	0.00%
Vanguard Fiduciary Trust Co	577,939	$1.24M	0.00%
Affinity Asset Advisors, LLC	500,000	$1.07M	0.06%
Odyssean, LLC	89,783	$193.0K	0.07%
DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main	69,666	$149.8K	0.00%
Ieq Capital, LLC	47,080	$101.2K	0.00%
MetLife Investment Management	36,208	$77.8K	0.00%
Vanguard Global Advisers, LLC	31,302	$67.3K	0.00%
Verdad Advisers, LP	23,554	$50.6K	0.06%
Wealth Enhancement Advisory Services, LLC	18,197	$43.9K	0.00%
Mariner, LLC	18,799	$40.4K	0.00%
Hamilton Lane Advisors LLC	14,400	$31.0K	0.02%
Merit Financial Group, LLC	10,928	$23.5K	0.00%
Captrust Financial Advisors	10,648	$22.9K	0.00%
Optiver Holding B.V.	1,701	$3.66K	0.00%
State of Wyoming	1,645	$3.54K	0.00%
Allworth Financial LP	627	$1.35K	0.00%
Root Financial Partners, LLC	305	$656	0.00%
Advisory Services Network, LLC	271	$583	0.00%
Fortitude Family Office, LLC	255	$548	0.00%
Farther Finance Advisors, LLC	156	$395	0.00%
SRS Capital Advisors, Inc.	179	$385	0.00%
MAI Capital Management	67	$145	0.00%
Lloyd Advisory Services, LLC.	48	$103	0.00%
Sunbelt Securities, Inc.	17	$37	0.00%
Fifth Third Bancorp	6	$13	0.00%
Caitong International Asset Management Co., Ltd	2	$4	0.00%

Sold out (20)

Institutions that held Alector, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.

Institutions that sold out of ALEC in Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vestal Point Capital, LP	755,000	$1.18M
Two Sigma Advisers, LP	651,800	$1.02M
Graham Capital Management, L.P.	104,851	$163.6K
Los Angeles Capital Management LLC	93,052	$141.4K
Man Group plc	86,162	$134.4K
Squarepoint Ops LLC	77,618	$121.1K
HRT Financial LP	57,341	$89.0K
Lexington Partners L.P.	53,488	$83.4K
Oxford Asset Management LLP	42,905	$66.9K
Tudor Investment Corp Et Al	41,282	$64.4K
SG Americas Securities, LLC	27,002	$42.0K
Dynamic Technology Lab Private Ltd	25,881	$40.0K
Virtu Financial LLC	21,886	$34.0K
Hershey Trust Co	20,572	$32.1K
R Squared Ltd	12,474	$19.5K
CI Private Wealth, LLC	10,288	$16.0K
Texas Yale Capital Corp.	10,000	$15.6K
Amalgamated Bank	2,523	$4.00K
Advisor Group Holdings, Inc.	620	$967
DekaBank Deutsche Girozentrale	100,000	–

Not filed for Q1 2026 yet (2)

Institutions that held Alector, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ALEC in Q4 2025 that haven't filed for Q1 2026
Institution	Shares, Q4 2025	Value, Q4 2025
Vanguard Group Inc	6,908,054	$10.8M
Comerica Bank	9	$14