Security key
014442107
Alector, Inc. - Common Stock, $0.0001 par value per share (ALEC)
CUSIP: 014442107
Q3 2025 13F Holders as of 30 Sep 2025
- Security type / class
- Equity / Common Stock, $0.0001 par value per share
- Total 13F shares
- 74,741,672
- Total 13F value
- $221,236,018
- Share change
- +4,231,372
- Put/Call ratio
- 36%
- SEC-reported price per share
- $2.96
- Number of holders
- 146
- Value change
- +$17,794,200
- Number of buys
- 69
- Number of sells
- 51
- Shares outstanding
- 110,074,447
Holder snapshot
7 signals
Show 1 more signal
Security identity
1 source field
Report period
Q3 2025
Institutions
146
Top holders
10
ALEC full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q4 2025
Previous quarter: Q2 2025
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
Marc Grasso
Disclosed value leader
FMR LLC
Comparable rows
15/15
Latest evidence
30 Jun 2025
3/4/5
13F
Lead comparable stake: 0.27%
Showing 1-6 of 15 holder rows.
Quick read
Marc Grasso leads the comparable SEC ownership view at 0.27%.
15 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.
Comparable ownership
Top 5
Marc Grasso
0.27%
FMR LLC
14%
BlackRock, Inc.
7.2%
VANGUARD GROUP INC
5.4%
PRICE T ROWE ASSOCIATES INC /MD/
4.4%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Marc Grasso |
3/4/5
Chief Financial Officer
|
0.27%
|
$396,262
296,072 shares
|
— | 02 Jun 2025 |
| FMR LLC |
13F
Company
|
14%
|
$20,998,445
14,998,889 shares
|
— | 30 Jun 2025 |
| BlackRock, Inc. |
13F
Company
|
7.2%
|
$11,163,012
7,973,580 shares
|
— | 30 Jun 2025 |
| VANGUARD GROUP INC |
13F
Company
|
5.4%
|
$8,382,786
5,987,704 shares
|
— | 30 Jun 2025 |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
Company
|
4.4%
|
$6,826,000
4,875,264 shares
|
— | 30 Jun 2025 |
| Merck & Co., Inc. |
13F
Company
|
3.2%
|
$4,964,007
3,545,719 shares
|
— | 30 Jun 2025 |
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 Q3 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
146
Shares
74,741,672
Rows available
146
| 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 Q3 2025 vs Q2 2025 Across Filers
Q2 2025 holders
134
Q3 2025 holders
146
Holder diff
12
| Investor | Q2 2025 Shares | Q3 2025 Shares | Share Diff | Share Chg % | Q2 2025 value | Q3 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend