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 2024 vs. Q4 2023

How the institutions holding Alector, Inc. changed between Q4 2023 and Q1 2024.

All holders in Q1 2024 All holders in Q4 2023

13F holders of ALEC: Q4 2023 compared with Q1 2024
Measure	Q4 2023	Of which not filed for Q1 2024	Q1 2024	Change
Holders	148	2	157	+11
Shares	63.9M	84.7K	74.2M	+10.4M (+16.2%)
Value	$510.1M	$675.1K	$446.6M	−$62.8M (−12.3%)

2 institutions that held it in Q4 2023 haven't filed for Q1 2024 yet. Not filing isn't selling, so the changes leave them out.

New holders (28)

Institutions that held Alector, Inc. at the end of Q1 2024 but not at the end of Q4 2023.

Institutions new to ALEC in Q1 2024
Institution	Shares	Value	% of portfolio
Deep Track Capital, LP	3,769,386	$22.7M	0.65%
Sphera Funds Management Ltd.	560,000	$3.37M	0.55%
Eversept Partners, LP	536,171	$3.23M	0.24%
Alyeska Investment Group, L.P.	256,182	$1.54M	0.01%
Woodline Partners LP	190,000	$1.14M	0.01%
Marshall Wace, LLP	177,278	$1.07M	0.00%
BIT Capital GmbH	141,372	$851.1K	0.08%
Susquehanna Fundamental Investments, LLC	126,164	$759.5K	0.04%
Spears Abacus Advisors LLC	66,177	$398.4K	0.01%
Gsa Capital Partners LLP	63,583	$383.0K	0.03%
New York Life Investment Management LLC	59,829	$360.2K	0.00%
ADAR1 Capital Management, LLC	52,500	$316.1K	0.09%
Squarepoint Ops LLC	39,284	$236.5K	0.00%
Citadel Advisors LLC	31,169	$187.6K	0.00%
Simplex Trading, LLC	29,132	$175.0K	0.01%
Engineers Gate Manager LP	24,660	$148.5K	0.00%
Qube Research & Technologies Ltd	18,789	$113.1K	0.00%
Jump Financial, LLC	15,925	$95.9K	0.00%
NEOS Investment Management LLC	14,344	$86.4K	0.01%
Oxford Asset Management LLP	12,002	$72.3K	0.08%
Mackenzie Financial Corp	10,582	$63.7K	0.00%
Lazard Asset Management LLC	9,833	$59.0K	0.00%
Aquatic Capital Management LLC	9,500	$57.2K	0.00%
Allspring Global Investments Holdings, LLC	6,674	$40.2K	0.00%
Carolinas Wealth Consulting LLC	1,500	$9.03K	0.00%
Pacer Advisors, Inc.	1,288	$7.75K	0.00%
Nisa Investment Advisors, LLC	49	$295	0.00%
Nelson, Van Denburg & Campbell Wealth Management Group, LLC	13	$78	0.00%

Sold out (17)

Institutions that held Alector, Inc. at the end of Q4 2023 and filed for Q1 2024 without it.

Institutions that sold out of ALEC in Q1 2024
Institution	Shares, Q4 2023	Value, Q4 2023
Campbell & CO Investment Adviser LLC	240,625	$1.92M
HRT Financial LP	239,116	$1.91M
Balyasny Asset Management LLC	41,136	$328.3K
Healthcare of Ontario Pension Plan Trust Fund	40,500	$323.2K
Point72 Middle East FZE	32,726	$261.2K
Cookson Peirce & Co Inc	20,000	$160.0K
Brevan Howard Capital Management LP	18,975	$151.4K
Walleye Trading LLC	17,279	$137.9K
SG Americas Securities, LLC	16,726	$133.0K
Axq Capital, LP	15,300	$122.1K
EntryPoint Capital, LLC	7,191	$57.4K
Quantbot Technologies LP	3,000	$23.9K
Advisory Services Network, LLC	683	$5.45K
Chesapeake Asset Management LLC	150	$1.20K
RFP Financial Group LLC	64	$511
HighMark Wealth Management LLC	50	$399
The PNC Financial Services Group, Inc.	6	$48

Not filed for Q1 2024 yet (2)

Institutions that held Alector, Inc. at the end of Q4 2023 and haven't filed a 13F for Q1 2024. Not filing isn't selling, so they aren't counted as sold out.

Institutions holding ALEC in Q4 2023 that haven't filed for Q1 2024
Institution	Shares, Q4 2023	Value, Q4 2023
Cannell Peter B & Co Inc	66,177	$528.1K
NinePointTwo Capital	18,542	$147.0K