Alector, Inc.
Total Trades
47
Buys
0
Sells
46
Largest Trade
N/A
Insiders
12
Institutional Funds
85
Inst. Value
$1M+
Activist Filings
25
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Wong-Sarad Grace | Principal Accounti… | SELL | $1K–$15K | 3K | $2.08 | Mar 3, 2026 |
| Wong-Sarad Grace | Principal Accounti… | SELL | $15K–$50K | 8K | $2.12 | Mar 3, 2026 |
| Rosenthal Arnon | CEO | SELL | $100K–$500K | 82K | $2.12 | Mar 3, 2026 |
| Berkley Neil Lindsay | CFO & Chief Busine… | SELL | $50K–$100K | 30K | $2.12 | Mar 3, 2026 |
| Wong-Sarad Grace | Principal Accounti… | SELL | $1K–$15K | 4K | $2.50 | Feb 26, 2026 |
| Wong-Sarad Grace | Principal Accounti… | SELL | $1K–$15K | 5K | $1.21 | Dec 8, 2025 |
| Wong-Sarad Grace | Principal Accounti… | SELL | $1K–$15K | 8K | $1.12 | Dec 4, 2025 |
| Rosenthal Arnon | CEO | SELL | $100K–$500K | 104K | $1.12 | Dec 4, 2025 |
| Kenkare-Mitra Sara | President and Head… | SELL | $15K–$50K | 42K | $1.12 | Dec 4, 2025 |
| Berkley Neil Lindsay | Chief Bus Ofcr & I… | SELL | $15K–$50K | 37K | $1.12 | Dec 4, 2025 |
| Wong-Sarad Grace | Principal Accounti… | SELL | $1K–$15K | 6K | $2.50 | Sep 4, 2025 |
| Berkley Neil Lindsay | Principal Financia… | SELL | $15K–$50K | 16K | $2.50 | Sep 4, 2025 |
| Kenkare-Mitra Sara | President and Head… | SELL | $50K–$100K | 24K | $2.50 | Sep 4, 2025 |
| Rosenthal Arnon | CEO | SELL | $100K–$500K | 52K | $2.50 | Sep 4, 2025 |
| Hammond Paula | Director | SELL | $15K–$50K | 14K | $2.36 | Aug 27, 2025 |
| Yaffe Kristine | Director | SELL | $1K–$15K | 1K | $1.44 | Jun 23, 2025 |
| GRASSO MARC | CFO | SELL | $15K–$50K | 16K | $1.34 | Jun 4, 2025 |
| Kenkare-Mitra Sara | President and Head… | SELL | $15K–$50K | 24K | $1.34 | Jun 4, 2025 |
| Rosenthal Arnon | CEO | SELL | $50K–$100K | 52K | $1.34 | Jun 4, 2025 |
| GRASSO MARC | CFO | SELL | $15K–$50K | 16K | $2.52 | Dec 3, 2024 |
| Rosenthal Arnon | CEO | SELL | $100K–$500K | 52K | $2.52 | Dec 3, 2024 |
| Kenkare-Mitra Sara | President and Head… | SELL | $50K–$100K | 27K | $2.52 | Dec 3, 2024 |
| Romano Gary | Chief Medical Offi… | SELL | $15K–$50K | 15K | $2.52 | Dec 3, 2024 |
| SCHELLER RICHARD H | Director | SELL | $100K–$500K | 44K | $5.16 | Aug 23, 2024 |
| Romano Gary | Chief Medical Offi… | SELL | $15K–$50K | 8K | $4.80 | Jun 4, 2024 |
| Kenkare-Mitra Sara | President and Head… | SELL | $50K–$100K | 13K | $4.80 | Jun 4, 2024 |
| Rosenthal Arnon | CEO | SELL | $100K–$500K | 25K | $4.80 | Jun 4, 2024 |
| GRASSO MARC | CFO | SELL | $15K–$50K | 7K | $4.80 | Jun 4, 2024 |
| Polaris Venture Management Co. VI, L.L.C. | 10% Owner | SELL | $1M+ | 500K | $6.00 | Sep 13, 2023 |
| MCGUIRE TERRANCE | Director | SELL | $1M+ | 500K | $6.00 | Sep 13, 2023 |
| Rosenthal Arnon | CEO | SELL | $15K–$50K | 6K | $5.19 | Sep 6, 2023 |
| Kenkare-Mitra Sara | President and Head… | SELL | $15K–$50K | 6K | $5.19 | Sep 6, 2023 |
| Romano Gary | Chief Medical Offi… | SELL | $1K–$15K | 3K | $5.19 | Sep 6, 2023 |
| GRASSO MARC | CFO | SELL | $1K–$15K | 1K | $5.19 | Sep 6, 2023 |
| Kenkare-Mitra Sara | President and Head… | SELL | $15K–$50K | 4K | $6.90 | Jun 5, 2023 |
| GRASSO MARC | CFO | SELL | $1K–$15K | 1K | $6.90 | Jun 5, 2023 |
| Romano Gary | Chief Medical Offi… | SELL | $15K–$50K | 3K | $6.90 | Jun 5, 2023 |
| Rosenthal Arnon | CEO | SELL | $15K–$50K | 5K | $6.90 | Jun 5, 2023 |
| Rosenthal Arnon | CEO | SELL | $50K–$100K | 15K | $6.22 | Mar 22, 2023 |
| Rosenthal Arnon | CEO | GRANT | N/A | 43K | — | Mar 22, 2023 |
| Romano Gary | Chief Medical Offi… | SELL | $15K–$50K | 5K | $8.47 | Mar 4, 2023 |
| Kenkare-Mitra Sara | President and Head… | SELL | $50K–$100K | 10K | $8.32 | Mar 4, 2023 |
| GRASSO MARC | CFO | SELL | $1K–$15K | 1K | $8.32 | Mar 4, 2023 |
| Rosenthal Arnon | CEO | SELL | $15K–$50K | 6K | $8.32 | Mar 4, 2023 |
| Romano Gary | Chief Medical Offi… | SELL | $15K–$50K | 2K | $10.62 | Sep 7, 2022 |
| King Robert | Chief Development … | SELL | $1K–$15K | 176 | $10.62 | Sep 7, 2022 |
| King Robert | Chief Development … | SELL | $1K–$15K | 287 | $15.57 | Mar 3, 2022 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 85 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| VANGUARD GROUP INC | 6.3M | $1M+ | SH |
| ACADIAN ASSET MANAGEMENT LLC | 3.4M | $1M+ | SH |
| BALYASNY ASSET MANAGEMENT L.P. | 3.3M | $1M+ | SH |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 2.2M | $1M+ | SH |
| Ikarian Capital, LLC | 2.1M | $1M+ | SH |
| STATE STREET CORP | 1.8M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 1.8M | $1M+ | SH |
| RENAISSANCE TECHNOLOGIES LLC | 1.5M | $1M+ | SH |
| Spruce Street Capital LP | 1.1M | $1M+ | SH |
| ADAR1 Capital Management, LLC | 1.1M | $1M+ | SH |
| ADAR1 Capital Management, LLC | 1.1M | $1M+ | SH |
| JANE STREET GROUP, LLC | 866K | $1M+ | SH |
| PANAGORA ASSET MANAGEMENT INC | 850K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 665K | $1M+ | SH |
| MACKENZIE FINANCIAL CORP | 660K | $1M+ | SH |
| BlackRock, Inc. | 452K | $500K+ | SH |
| DekaBank Deutsche Girozentrale | 100K | $500K+ | SH |
| MORGAN STANLEY | 244K | $100K–$500K | SH |
| GOLDMAN SACHS GROUP INC | 235K | $100K–$500K | SH |
| GSA CAPITAL PARTNERS LLP | 226K | $100K–$500K | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
SC 13G/A · Feb 6, 2026
7.4%
8.2M shares
SC 13G/A · Jan 30, 2026
6.3%
6.9M shares
SC 13G/A · Jan 21, 2026
4.7%
5.2M shares
SC 13G · Nov 14, 2025
4.6%
5.0M shares
SC 13G · Nov 14, 2025
6.9%
7.0M shares
Polaris Venture Partners VI, L.P.
SC 13G/A · Nov 13, 2025
0.5%
498K shares
SC 13G/A · Nov 7, 2025
3.6%
3.6M shares
SC 13G/A · Oct 17, 2025
5.1%
5.2M shares
SC 13G/A · Aug 14, 2025
0.0%
0 shares
SC 13G/A · Apr 17, 2025
6.2%
6.1M shares
SC 13G · Dec 6, 2024
9.9%
9.7M shares
Polaris Venture Partners VI, L.P.
SC 13G/A · Nov 13, 2024
0.5%
498K shares
Morgan Stanley I.R.S. # 36-3145972
SC 13G/A · Nov 7, 2024
4.5%
4.3M shares
The Vanguard Group - 23-1945930
SC 13G/A · Feb 13, 2024
5.2%
4.4M shares
Morgan Stanley I.R.S. # 36-3145972
SC 13G · Feb 12, 2024
5.5%
4.6M shares
SC 13G/A · Jan 24, 2024
9.6%
8.1M shares
SC 13G/A · Oct 13, 2023
14.5%
12.2M shares
SC 13G/A · Oct 10, 2023
14.5%
12.2M shares
SC 13G/A · Feb 10, 2023
0.0%
6.9M shares
SC 13G/A · Feb 10, 2023
4.9%
4.1M shares
SC 13G/A · Feb 1, 2023
5.5%
4.6M shares
SC 13G/A · Jan 25, 2023
8.9%
7.4M shares
SC 13G · Feb 14, 2022
8.0%
6.6M shares
SC 13G/A · Feb 14, 2022
6.1%
5.0M shares
Polaris Venture Partners VI, L.P.
SC 13G/A · Feb 11, 2022
0.6%
498K shares