Alector Inc

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Alector Inc
TickerALEC
CIK #0001653087
CUSIP014442107
SectorLife Sciences - Biological Products, (No Disgnostic Substances)
Address151 Oyster Point Blvd, Suite 300, South San Francisco, CA 94080
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
Alector LLC 2015-09-16 32.3 M Exemption: 506(b) · Duration: One year or less · Revenue: Decline to Disclose
CIK Filing 2011 - 2026
[0001653087] 10-K
[0001653087] 10-Q
[0001653087] 3
[0001653087] 4
[0001653087] 8-K
[0001653087] D
[0001653087] SC 13D
[0001653087] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
BlackRock Inc Alector Inc [2026-04-27] 0.0
TCG Crossover GP II LLC Alector Inc [2025-11-14] 0.0
RTW Investments LP Alector Inc [2025-11-14] 0.0
RA Capital Management LP Alector Inc [2024-12-06] 0.9
Morgan Stanley Alector Inc [2024-02-12] 5.5
Rosenthal Arnon Alector Inc [2024-02-08] 0.0
Rosenthal Arnon Alector Inc [2022-02-14] 8.0
FMR LLC Alector Inc [2022-02-09] 0.0
EcoR1 Capital LLC Alector Inc [2021-07-12] 6.0
Vanguard Group Inc Alector Inc [2021-02-10] 6.31
BlackRock Inc Alector Inc [2021-02-02] 6.5
Federated Hermes Inc Alector Inc [2020-02-13] 5.54
Polaris Venture Partners VI LP Alector Inc [2020-02-12] 0.7
OrbiMed Advisors LLC Alector Inc [2019-02-20] 18.86
Merck & Co Inc Alector Inc [2019-02-14] 5.1
Flynn James E Alector Inc [2019-02-11] 1.32
Form 3/4/5 Filer 2011 - 2026
Alector LLC
Desouza Errol B
Yaffe Kristine
Garofalo Elizabeth A
Hammond Paula
Scheller Richard H
Altmeyer Mark
Lavigne Louis J Jr
Berkley Neil Lindsay
Wong-Sarad Grace
Rosenthal Arnon
Kenkare-Mitra Sara
Grasso Marc
Romano Gary
Wehner David M
Polaris Venture Partners VI AIV LP
Polaris Venture Partners Founders' Fund VI LP
Polaris Venture Partners VI LP
Polaris Venture Partners VI AIV-B LP
Polaris Venture Management Co VI LLC
McGuire Terrance
Gerngross Tillman U
King Robert
Suliman Shehnaaz
Rubinstein Linda M
Paul Robert
Yu Calvin
Oney Sabah
OrbiMed Advisors LLC
OrbiMed Capital GP IV LLC
OrbiMed Capital LLC
Gordon Carl L
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Berkley Neil Lindsay
Common Stock
2026-03-15 Grant 54,600 $0.00
Rosenthal Arnon
Common Stock
2026-03-13 Grant 116,246 $0.00
Wong-Sarad Grace
Common Stock
2026-03-10 Sell 1,000 $2.65 2,650
Wong-Sarad Grace
Common Stock
2026-03-03 Sell 3,367 $2.08 7,003
Wong-Sarad Grace
Common Stock
2026-03-02 Sell 8,071 $2.12 17,111
Rosenthal Arnon
Common Stock
2026-03-02 Sell 81,864 $2.12 173,552
Berkley Neil Lindsay
Common Stock
2026-03-02 Sell 29,649 $2.12 62,856
Wong-Sarad Grace
Common Stock
2026-02-26 Sell 4,079 $2.50 10,198
Wong-Sarad Grace
Common Stock
2025-12-05 Sell 4,753 $1.21 5,751
Kenkare-Mitra Sara
Common Stock
2025-12-03 Sell 41,687 $1.12 46,689
Rosenthal Arnon
Common Stock
2025-12-03 Sell 104,347 $1.12 116,869
Berkley Neil Lindsay
Common Stock
2025-12-03 Sell 37,261 $1.12 41,732
Wong-Sarad Grace
Common Stock
2025-12-03 Sell 8,056 $1.12 9,023
Berkley Neil Lindsay
Common Stock
2025-11-10 Grant 65,000 $0.00
Wong-Sarad Grace
Common Stock
2025-11-10 Grant 32,343 $0.00
Berkley Neil Lindsay
Employee Stock Option (right to buy) · derivative
2025-11-10 Grant 195,000 $0.00
Rosenthal Arnon
Employee Stock Option (right to buy) · derivative
2025-11-10 Grant 522,500 $0.00
Wong-Sarad Grace
Employee Stock Option (right to buy) · derivative
2025-11-10 Grant 48,535 $0.00
Rosenthal Arnon
Common Stock
2025-11-10 Grant 174,167 $0.00
Common Stock
2025-09-02 Sell 23,638 $2.50 59,095
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 138 84,586,397
2025-12-31 131 81,444,566
2025-09-30 150 70,997,576
2025-06-30 136 63,854,603
2025-03-31 143 72,672,789
2024-12-31 151 72,510,667
2024-09-30 161 74,678,205
2024-06-30 162 73,825,840
2024-03-31 159 82,142,505
2023-12-31 150 69,167,050
2023-09-30 150 62,225,153
2023-06-30 146 59,015,775
Form 13F Holdings
Firm Period DFND Voting Shares
Diversified Trust Co [2026-06-30] SOLE 0 42,351
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 989 30,251
Hamilton Lane Advisors LLC [2026-06-30] SOLE 10,286 14,400
Merit Financial Group LLC [2026-06-30] SOLE 19 6,492
Merit Financial Group LLC [2026-06-30] OTR 0 4,751
Gamma Investing LLC [2026-06-30] DFND 1,523 1,523
True Wealth Design LLC [2026-06-30] SOLE 0 867
Physician Wealth Advisors Inc [2026-06-30] SOLE 0 752
Hughes Financial Services LLC [2026-06-30] SOLE 388 388
Farther Finance Advisors LLC [2026-06-30] SOLE 0 253
Fortitude Family Office LLC [2026-06-30] SOLE 134 134
IFP Advisors LLC [2026-06-30] SOLE 94 94
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