Security key
014442107
Alector, Inc. - Common Stock, $0.0001 par value per share (ALEC)
CUSIP: 014442107
Q4 2024 13F Holders as of 31 Dec 2024
- Security type / class
- Equity / Common Stock, $0.0001 par value per share
- Total 13F shares
- 73,449,099
- Total 13F value
- $138,781,190
- Share change
- -3,226,702
- Put/Call ratio
- 128%
- SEC-reported price per share
- $1.89
- Number of holders
- 147
- Value change
- -$36,884,482
- Number of buys
- 66
- Number of sells
- 77
- Shares outstanding
- 147,058,824
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q4 2024
Institutions
147
Top holders
10
ALEC full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q3 2026
Alector, Inc. SEC filings
Alector, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 014442107
Recent filing periods:
Ownership snapshot
Top reported holders 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. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Polaris Venture Managemen...
Disclosed value leader
Polaris Venture Managemen...
Comparable rows
0/15
Latest evidence
30 Sep 2024
3/4/5
13F
Highest disclosed value: $68,200,238
15 rows are not safely comparable across share classes.
Showing 1-6 of 15 holder rows.
Quick read
Polaris Venture Management Co. VI, L.L.C. has the largest disclosed position value at $68.2M.
0 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Polaris Venture Management Co. VI, L.L.C.'s linked filing trail.
Disclosed position value
Top 5
Polaris Venture Management Co. VI...
$68.2M
Terrance McGuire
$60.65M
FMR LLC
$68.01M
BlackRock, Inc.
$43.58M
VANGUARD GROUP INC
$25.42M
Value bars compare disclosed positions; verify each figure against the linked filing evidence.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Polaris Venture Management Co. VI, L.L.C. |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$68,200,238
9,853,817 shares
|
— | 29 May 2024 |
| Terrance McGuire |
3/4/5
Director, 10%+ Owner
|
—
denominator unverified
|
$60,653,001
10,908,813 shares
|
— | 11 Sep 2023 |
| FMR LLC |
13F
Company
|
—
denominator unverified
|
$68,012,766
14,595,014 shares
|
— | 30 Sep 2024 |
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$43,580,526
9,352,044 shares
|
— | 30 Sep 2024 |
| VANGUARD GROUP INC |
13F
Company
|
—
denominator unverified
|
$25,423,688
5,455,727 shares
|
— | 30 Sep 2024 |
| Deep Track Capital, LP |
13F
Company
|
—
denominator unverified
|
$21,585,111
4,631,998 shares
|
— | 30 Sep 2024 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2024
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
147
Shares
73,449,099
Rows available
147
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2024 vs Q3 2024 Across Filers
Q3 2024 holders
158
Q4 2024 holders
147
Holder diff
-11
| Investor | Q3 2024 Shares | Q4 2024 Shares | Share Diff | Share Chg % | Q3 2024 value | Q4 2024 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend