Security key
032724106
ANAPTYSBIO, INC - Common Stock, par value $0.001 per share (ANAB)
CUSIP: 032724106
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock, par value $0.001 per share
- Total 13F shares
- 28,230,614
- Total 13F value
- $1,550,503,238
- Share change
- -1,039,129
- Put/Call ratio
- 22%
- SEC-reported price per share
- $55.46
- Number of holders
- 205
- Value change
- -$53,527,829
- Number of buys
- 102
- Number of sells
- 88
- Shares outstanding
- 29,839,180
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
Q1 2026
Institutions
205
Top holders
10
ANAB full security history
Ownership snapshot
Full 13F holder table
ANAPTYSBIO, INC SEC filings
ANAPTYSBIO, INC company facts
Broader feeds
Ownership snapshot
Top reported holders of ANAB - ANAPTYSBIO, INC - Common Stock, par value $0.001 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
BlackRock, Inc.
Disclosed value leader
EcoR1 Capital, LLC
Comparable rows
15/15
Latest evidence
31 Dec 2025
13F
13D/G
3/4/5
Lead comparable stake: 6.2%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 6.2%.
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.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
6.2%
GOLDMAN SACHS GROUP INC
4.5%
MORGAN STANLEY
3.6%
First Light Asset Management, LLC
3.1%
MILLENNIUM MANAGEMENT LLC
2.9%
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 |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
6.2%
from 13D/G
|
$84,085,167
1,734,430 shares
|
— | 31 Dec 2025 |
| GOLDMAN SACHS GROUP INC |
13D/G
13F
THE GOLDMAN SACHS GROUP, INC. · Company
|
4.5%
|
$38,314,646
1,251,295 shares
|
-$10,329,933 | 30 Sep 2025 |
| MORGAN STANLEY |
13F
13D/G
Company
|
3.6%
from 13D/G
|
$50,155,606
1,034,562 shares
|
— | 31 Dec 2025 |
| First Light Asset Management, LLC |
13F
13D/G
Company · Mathew P. Arens
|
3.1%
from 13D/G
|
$31,329,618
646,238 shares
|
— | 31 Dec 2025 |
| MILLENNIUM MANAGEMENT LLC |
13D/G
13F
Company
|
2.9%
|
$39,442,003
813,571 shares
|
-$29,733,912 | 31 Dec 2025 |
| FMR LLC |
13D/G
13F
Company
|
0.9%
|
$5,091,861
254,212 shares
|
-$33,068,368 | 30 May 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 Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
205
Shares
28,230,614
Rows available
205
| 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 Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
205
Q1 2026 holders
205
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|