Security key
03940C100
Arcellx, Inc. - Common Stock, $0.001 par value per share (ACLX)
CUSIP: 03940C100
Q1 2025 13F Holders as of 31 Mar 2025
- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Total 13F shares
- 61,569,105
- Total 13F value
- $4,042,657,536
- Share change
- +2,371,228
- Put/Call ratio
- 39%
- SEC-reported price per share
- $65.60
- Number of holders
- 195
- Value change
- +$146,759,811
- Number of buys
- 97
- Number of sells
- 106
- Shares outstanding
- 100
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 2025
Institutions
195
Top holders
10
ACLX full security history
Ownership snapshot
Full 13F holder table
Arcellx, Inc. SEC filings
Arcellx, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of ACLX - Arcellx, Inc. - Common Stock, $0.001 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
BlackRock, Inc.
Disclosed value leader
FMR LLC
Comparable rows
15/15
Latest evidence
31 Dec 2024
13F
13D/G
3/4/5
Lead comparable stake: 6.4%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 6.4%.
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.
6.4%
FMR LLC
7956633%
GILEAD SCIENCES, INC.
6720803%
Paradigm Biocapital Advisors LP
4371601%
NEA Management Company, LLC
3745262%
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
|
6.4%
from 13D/G
|
$295,564,873
3,854,021 shares
|
— | 31 Dec 2024 |
| FMR LLC |
13F
Company
|
7956633%
|
$610,194,207
7,956,633 shares
|
— | 31 Dec 2024 |
| GILEAD SCIENCES, INC. |
13F
3/4/5
Company · 10%+ Owner
|
6720803%
|
$515,418,382
6,720,803 shares
|
— | 31 Dec 2024 |
| Paradigm Biocapital Advisors LP |
13F
Company
|
4371601%
|
$335,258,081
4,371,601 shares
|
— | 31 Dec 2024 |
| NEA Management Company, LLC |
13F
Company
|
3745262%
|
$287,224,143
3,745,262 shares
|
— | 31 Dec 2024 |
| PERCEPTIVE ADVISORS LLC |
13F
Company
|
3478888%
|
$266,795,921
3,478,888 shares
|
— | 31 Dec 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 Q1 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
195
Shares
61,569,105
Rows available
195
| 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 2025 vs Q1 2025 Across Filers
Q1 2025 holders
195
Q1 2025 holders
195
Holder diff
0
| Investor | Q1 2025 Shares | Q1 2025 Shares | Share Diff | Share Chg % | Q1 2025 value | Q1 2025 value | Value change | Value Chg % |
|---|