Security key
03940C100
Arcellx, Inc. - Common Stock, $0.001 par value per share (ACLX)
CUSIP: 03940C100
Q2 2026 13F Holders as of 30 Jun 2026
- Security type / class
- Equity / Common Stock, $0.001 par value per share
- Total 13F shares
- 30,013
- Total 13F value
- $3,431,496
- Share change
- -56,649,045
- SEC-reported price per share
- $114.71
- Number of holders
- 2
- Value change
- -$6,474,797,364
- Number of buys
- 1
- Number of sells
- 232
- Shares outstanding
- 100
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q2 2026
Institutions
2
Top holders
2
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
GILEAD SCIENCES, INC.
Disclosed value leader
GILEAD SCIENCES, INC.
Comparable rows
15/15
Latest evidence
31 Mar 2026
13F
13D/G
3/4/5
Lead comparable stake: 100%
13D/G row: GILEAD SCIENCES, INC.
Showing 1-6 of 15 holder rows.
Quick read
GILEAD SCIENCES, INC. leads the comparable SEC ownership view at 100%.
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 GILEAD SCIENCES, INC.'s linked filing trail.
Comparable ownership
Top 5
GILEAD SCIENCES, INC.
100%
BlackRock, Inc.
6.4%
T. Rowe Price Investment Manageme...
4.5%
PERCEPTIVE ADVISORS LLC
4.5%
RA CAPITAL MANAGEMENT, L.P.
2.2%
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 |
|---|---|---|---|---|---|
| GILEAD SCIENCES, INC. |
13F
13D/G
3/4/5
Company · 10%+ Owner
|
100%
from 13D/G
|
$771,682,600
6,720,803 shares
|
— | 31 Mar 2026 |
| BlackRock, Inc. |
13F
13D/G
Company
|
6.4%
from 13D/G
|
$452,992,229
3,945,238 shares
|
— | 31 Mar 2026 |
| T. Rowe Price Investment Management, Inc. |
13F
13D/G
Company
|
4.5%
from 13D/G
|
$259,020,000
2,255,878 shares
|
— | 31 Mar 2026 |
| PERCEPTIVE ADVISORS LLC |
13D/G
|
4.5%
|
$162,432,900
2,478,000 shares
|
-$29,397,733 | 30 Jun 2025 |
| RA CAPITAL MANAGEMENT, L.P. |
13D/G
|
2.2%
|
$83,974,428
1,267,156 shares
|
$0 | 31 Dec 2025 |
| FMR LLC |
13D/G
13F
Company
|
0.5%
|
$21,601,128
309,117 shares
|
-$227,432,217 | 27 Feb 2026 |
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 Q2 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
2
Shares
30,013
Rows available
2
| 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 Q2 2026 vs Q1 2026 Across Filers
Q1 2026 holders
239
Q2 2026 holders
2
Holder diff
-237
| Investor | Q1 2026 Shares | Q2 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q2 2026 value | Value change | Value Chg % |
|---|