Alector, Inc. - Common Stock, $0.0001 par value per share (ALEC)
CUSIP: 014442107
Q4 2025 13F Holders as of 31 Dec 2025
- Type / Class
- Equity / Common Stock, $0.0001 par value per share
- Shares outstanding
- 110,074,447
- Total 13F shares
- 84,345,909
- Share change
- +7,938,661
- Total reported value
- $131,539,973
- Put/Call ratio
- 65%
- Price per share
- $1.56
- Number of holders
- 128
- Value change
- -$373,040
- Number of buys
- 60
- Number of sells
- 78
Quarterly Holders Quick Answers
What is CUSIP 014442107?
CUSIP 014442107 identifies ALEC - Alector, Inc. - Common Stock, $0.0001 par value per share in SEC institutional holdings data.
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Recent filing periods for CUSIP 014442107:
Top shareholders of ALEC - Alector, Inc. - Common Stock, $0.0001 par value per share (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| Polaris Venture Management Co. VI, L.L.C. |
3/4/5
|
10%+ Owner |
—
class O/S missing
|
9,853,817
|
$68,200,238 | — | 29 May 2024 | |
| Terrance McGuire |
3/4/5
|
Director, 10%+ Owner |
—
class O/S missing
|
10,908,813
|
$60,653,001 | — | 11 Sep 2023 | |
| FMR LLC |
13F
13D/G
|
Company |
3.6%
from 13D/G
|
15,181,849
|
$44,938,273 | — | 30 Sep 2025 | |
| TCG Crossover GP II, LLC |
13D/G
|
Chen Yu |
9.2%
|
10,000,000
|
$29,600,000 | $0 | 22 Oct 2025 | |
| BlackRock, Inc. |
13F
|
Company |
6.5%
|
7,197,973
|
$21,305,999 | — | 30 Sep 2025 | |
| RTW INVESTMENTS, LP |
13F
|
Company |
6.4%
|
6,990,806
|
$20,692,786 | — | 30 Sep 2025 | |
| VANGUARD GROUP INC |
13F
|
Company |
5.5%
|
6,034,659
|
$17,862,591 | — | 30 Sep 2025 | |
| Tillman U. Gerngross |
3/4/5
|
Director |
—
mixed-class rows
|
2,656,679
mixed-class rows
|
$14,702,414 | — | 14 Jun 2023 | |
| Arnon Rosenthal |
13D/G
|
— |
7.4%
|
8,213,925
|
$12,813,723 | $0 | 31 Dec 2025 | |
| Merck & Co., Inc. |
13F
|
Company |
3.2%
|
3,545,719
|
$10,495,328 | — | 30 Sep 2025 | |
| ACADIAN ASSET MANAGEMENT LLC |
13F
|
Company |
2.2%
|
2,372,985
|
$7,016,000 | — | 30 Sep 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
2%
|
2,185,032
|
$6,469,000 | — | 30 Sep 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
1.7%
|
1,861,258
|
$5,510,692 | — | 30 Sep 2025 | |
| STATE STREET CORP |
13F
|
Company |
1.6%
|
1,734,679
|
$5,134,650 | — | 30 Sep 2025 | |
| Eversept Partners, LP |
13F
|
Company |
1.4%
|
1,488,725
|
$4,406,626 | — | 30 Sep 2025 | |
| Euclidean Capital LLC |
13F
|
Company |
1.2%
|
1,307,858
|
$3,871,260 | — | 30 Sep 2025 | |
| JACOBS LEVY EQUITY MANAGEMENT, INC |
13F
|
Company |
1.1%
|
1,230,974
|
$3,643,683 | — | 30 Sep 2025 | |
| MILLENNIUM MANAGEMENT LLC |
13F
|
Company |
1%
|
1,155,027
|
$3,418,880 | — | 30 Sep 2025 | |
| DEUTSCHE BANK AG\ |
13F
|
Company |
0.97%
|
1,068,215
|
$3,161,917 | — | 30 Sep 2025 | |
| DEERFIELD MANAGEMENT COMPANY, L.P. |
13F
|
Company |
0.96%
|
1,055,192
|
$3,123,368 | — | 30 Sep 2025 | |
| Robert King |
3/4/5
|
Chief Development Officer |
—
mixed-class rows
|
565,255
mixed-class rows
|
$3,062,843 | — | 01 Oct 2022 | |
| 683 Capital Management, LLC |
13F
|
Company |
0.91%
|
1,000,000
|
$2,960,000 | — | 30 Sep 2025 | |
| 5AM Venture Management, LLC |
13F
|
Company |
0.9%
|
995,841
|
$2,947,689 | — | 30 Sep 2025 | |
| Vestal Point Capital, LP |
13F
|
Company |
0.89%
|
980,000
|
$2,900,800 | — | 30 Sep 2025 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
0.89%
|
978,204
|
$2,895,484 | — | 30 Sep 2025 | |
| RENAISSANCE TECHNOLOGIES LLC |
13F
|
Company |
0.86%
|
949,150
|
$2,809,484 | — | 30 Sep 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.79%
|
873,375
|
$2,585,189 | — | 30 Sep 2025 | |
| DAFNA Capital Management LLC |
13F
|
Company |
0.73%
|
798,351
|
$2,363,119 | — | 30 Sep 2025 | |
| Ikarian Capital, LLC |
13F
|
Company |
0.69%
|
760,000
|
$2,249,601 | — | 30 Sep 2025 | |
| PANAGORA ASSET MANAGEMENT INC |
13F
|
Company |
0.67%
|
741,293
|
$2,194,227 | — | 30 Sep 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.63%
|
689,524
|
$2,040,991 | — | 30 Sep 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.58%
|
633,709
|
$1,875,779 | — | 30 Sep 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.57%
|
628,598
|
$1,861,000 | — | 30 Sep 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
0.55%
|
609,909
|
$1,805,331 | — | 30 Sep 2025 | |
| BOOTHBAY FUND MANAGEMENT, LLC |
13F
|
Company |
0.48%
|
524,077
|
$1,551,268 | — | 30 Sep 2025 | |
| TWO SIGMA ADVISERS, LP |
13F
|
Company |
0.47%
|
517,400
|
$1,531,504 | — | 30 Sep 2025 | |
| MEDICI CAPITAL LLC |
13F
|
Company |
0.44%
|
481,974
|
$1,426,643 | — | 30 Sep 2025 | |
| CITADEL ADVISORS LLC |
13F
|
Company |
0.43%
|
471,581
|
$1,395,879 | — | 30 Sep 2025 | |
| Robert Paul |
3/4/5
|
Chief Medical Officer |
—
mixed-class rows
|
318,769
mixed-class rows
|
$1,302,814 | — | 09 Aug 2021 | |
| AQR CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.4%
|
438,087
|
$1,296,736 | — | 30 Sep 2025 | |
| MORGAN STANLEY |
13F
|
Company |
0.39%
|
434,168
|
$1,285,137 | — | 30 Sep 2025 | |
| JANE STREET GROUP, LLC |
13F
|
Company |
0.32%
|
350,231
|
$1,036,684 | — | 30 Sep 2025 | |
| New Leaf Venture Partners, L.L.C. |
13F
|
Company |
0.31%
|
339,569
|
$1,005,124 | — | 30 Sep 2025 | |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP |
13F
|
Company |
0.28%
|
308,660
|
$913,634 | — | 30 Sep 2025 | |
| TWO SIGMA INVESTMENTS, LP |
13F
|
Company |
0.28%
|
307,179
|
$909,250 | — | 30 Sep 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
0.27%
|
295,846
|
$876,017 | — | 30 Sep 2025 | |
| MACKENZIE FINANCIAL CORP |
13F
|
Company |
0.26%
|
283,712
|
$839,788 | — | 30 Sep 2025 | |
| AMERIPRISE FINANCIAL INC |
13F
|
Company |
0.25%
|
274,042
|
$811,164 | — | 30 Sep 2025 | |
| TD ASSET MANAGEMENT INC |
13F
|
Company |
0.25%
|
273,738
|
$810,264 | — | 30 Sep 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
0.22%
|
246,283
|
$728,997 | — | 30 Sep 2025 |
Institutional Holders of Alector, Inc. - Common Stock, $0.0001 par value per share (ALEC) as of Q4 2025
As of 31 Dec 2025,
Alector, Inc. - Common Stock, $0.0001 par value per share (ALEC) was held by
128 institutional
shareholders
that filed Form 13F with the SEC.
Together, they reported ownership of
84,345,909 shares.
The largest 10 holders included
TCG Crossover Management, LLC, BlackRock, Inc., VANGUARD GROUP INC, Foresite Capital Management IV, LLC, Merck & Co., Inc., ACADIAN ASSET MANAGEMENT LLC, 683 Capital Management, LLC, Balyasny Asset Management L.P., D. E. Shaw & Co., Inc., and FMR LLC.
This page lists
128
institutional shareholders reporting positions in this security
for the Q4 2025 filing period.
| Investor | Option | Weight % | Change % | Value $ | * Price | Shares | Share Change | Activity | Report Period |
|---|
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
146
Q4 2025 holders
128
Holder diff
-18
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 Value $ | Q4 2025 Value $ | Value Diff $ | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend
* Reported Price is the price of the security as of the portfolio date. This value is significant in that it is the last known price at which the security was still held.
An asterisk sign (*) next to the price indicates that the price is likely invalid.
An asterisk sign (*) next to the price indicates that the price is likely invalid.