Arcellx, Inc.
Total Trades
138
Buys
5
Sells
77
Largest Trade
N/A
Insiders
14
Institutional Funds
170
Inst. Value
$1M+
Activist Filings
50
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | N/A | 30K | — | Jan 7, 2025 |
| Elghandour Rami | SEE REMARKS | SELL | $1M+ | 29K | $78.40 | Jan 7, 2025 |
| Elghandour Rami | SEE REMARKS | EXERCISE | N/A | 109K | — | Jan 7, 2025 |
| Patel Kavita | Director | SELL | $100K–$500K | 2K | $76.97 | Dec 27, 2024 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Dec 27, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OF… | EXERCISE | $15K–$50K | 3K | $8.66 | Nov 19, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OF… | SELL | $100K–$500K | 2K | $88.87 | Nov 19, 2024 |
| Patel Kavita | Director | SELL | $100K–$500K | 2K | $106.33 | Nov 14, 2024 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Nov 14, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OF… | SELL | $1M+ | 12K | $100.55 | Nov 13, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OF… | EXERCISE | $50K–$100K | 7K | $8.66 | Nov 13, 2024 |
| Patel Kavita | Director | EXERCISE | $500K+ | 57K | $12.61 | Nov 13, 2024 |
| Patel Kavita | Director | SELL | $1M+ | 57K | $103.90 | Nov 13, 2024 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Oct 22, 2024 |
| Patel Kavita | Director | SELL | $100K–$500K | 2K | $89.69 | Oct 22, 2024 |
| Patel Kavita | Director | SELL | $100K–$500K | 2K | $82.24 | Oct 3, 2024 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Oct 3, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $1M+ | 27K | $67.03 | Sep 4, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | $100K–$500K | 27K | $13.27 | Sep 4, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | $100K–$500K | 22K | $15.00 | Aug 28, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $1M+ | 22K | $71.13 | Aug 28, 2024 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Aug 22, 2024 |
| Patel Kavita | Director | SELL | $50K–$100K | 2K | $65.88 | Aug 22, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | $15K–$50K | 5K | $6.28 | Aug 19, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $100K–$500K | 5K | $65.05 | Aug 19, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | $100K–$500K | 20K | $10.94 | Aug 2, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $1M+ | 20K | $60.42 | Aug 2, 2024 |
| Patel Kavita | Director | SELL | $50K–$100K | 2K | $61.97 | Aug 1, 2024 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Aug 1, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | $100K–$500K | 20K | $11.93 | Jul 3, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $1M+ | 20K | $55.39 | Jul 3, 2024 |
| Patel Kavita | Director | SELL | $500K+ | 10K | $54.27 | Jun 28, 2024 |
| Patel Kavita | Director | EXERCISE | $50K–$100K | 10K | $6.66 | Jun 28, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OF… | SELL | $500K+ | 13K | $53.70 | Jun 28, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | $100K–$500K | 20K | $11.53 | Jun 14, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $1M+ | 20K | $55.13 | Jun 14, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OF… | SELL | $500K+ | 12K | $50.71 | May 25, 2024 |
| Gilson Michelle | CHIEF FINANCIAL OF… | EXERCISE | N/A | 22K | — | May 25, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $500K+ | 18K | $51.33 | May 3, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | $100K–$500K | 18K | $6.28 | May 3, 2024 |
| Ware Olivia C | Director | EXERCISE | $50K–$100K | 9K | $7.61 | Apr 18, 2024 |
| Ware Olivia C | Director | SELL | $500K+ | 9K | $55.55 | Apr 18, 2024 |
| Elghandour Rami | SEE REMARKS | SELL | $1M+ | 23K | $67.09 | Apr 3, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $1M+ | 47K | $70.06 | Mar 27, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | $100K–$500K | 25K | $6.28 | Mar 27, 2024 |
| Carroll Jill | Director | SELL | $1M+ | 504K | $70.55 | Mar 25, 2024 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $500K+ | 10K | $63.33 | Feb 13, 2024 |
| Elghandour Rami | SEE REMARKS | SELL | $1M+ | 38K | $63.33 | Feb 13, 2024 |
| Heery Christopher | Chief Medical Offi… | SELL | $100K–$500K | 3K | $35.38 | Aug 7, 2023 |
| Heery Christopher | Chief Medical Offi… | EXERCISE | $15K–$50K | 3K | $15.00 | Aug 7, 2023 |
Institutional Ownership
13F filings as of Dec 31, 2025 · 170 funds holding
| Fund | Shares | Value | Type |
|---|---|---|---|
| GILEAD SCIENCES, INC. | 6.7M | $1M+ | SH |
| NEA Management Company, LLC | 3.0M | $1M+ | SH |
| SR ONE CAPITAL MANAGEMENT, LP | 2.3M | $1M+ | SH |
| STATE STREET CORP | 2.0M | $1M+ | SH |
| PERCEPTIVE ADVISORS LLC | 1.5M | $1M+ | SH |
| RA CAPITAL MANAGEMENT, L.P. | 1.3M | $1M+ | SH |
| GEODE CAPITAL MANAGEMENT, LLC | 828K | $1M+ | SH |
| Affinity Asset Advisors, LLC | 524K | $1M+ | SH |
| LORD, ABBETT & CO. LLC | 438K | $1M+ | SH |
| AMERICAN CENTURY COMPANIES INC | 419K | $1M+ | SH |
| Hudson Bay Capital Management LP | 401K | $1M+ | SH |
| Pictet Asset Management Holding SA | 343K | $1M+ | SH |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 340K | $1M+ | SH |
| Fisher Asset Management, LLC | 323K | $1M+ | SH |
| VANGUARD GROUP INC | 302K | $1M+ | SH |
| TD ASSET MANAGEMENT INC | 301K | $1M+ | SH |
| AJU IB Investment Co., Ltd. | 223K | $1M+ | SH |
| BARCLAYS PLC | 197K | $1M+ | SH |
| CITIGROUP INC | 156K | $1M+ | SH |
| GOLDMAN SACHS GROUP INC | 142K | $1M+ | SH |
Activist & 5%+ Owners
SC 13D/13G filings — investors holding 5%+ of outstanding shares
T. Rowe Price Investment Management, Inc.
SC 13G/A · Mar 6, 2026
4.5%
2.7M shares
SC 13G/A · Mar 6, 2026
0.5%
309K shares
New Enterprise Associates 15, L.P.
SC 13D/A · Feb 25, 2026
5.3%
3.0M shares
SC 13D/A · Feb 25, 2026
6.4%
3.9M shares
SC 13D · Feb 23, 2026
11.5%
6.7M shares
SC 13G/A · Feb 17, 2026
2.2%
1.3M shares
SC 13G/A · Feb 5, 2026
6.2%
3.6M shares
T. Rowe Price Investment Management, Inc.
SC 13G/A · Dec 5, 2025
16.6%
9.6M shares
SC 13G/A · Nov 5, 2025
10.4%
5.8M shares
T. Rowe Price Investment Management, Inc.
SC 13G · Sep 8, 2025
11.3%
6.3M shares
New Enterprise Associates 15, L.P.
SC 13D/A · Aug 15, 2025
5.5%
3.0M shares
SC 13G/A · Aug 14, 2025
4.5%
2.5M shares
SC 13G/A · May 15, 2025
5.3%
2.9M shares
New Enterprise Associates 15, L.P.
SC 13D/A · May 12, 2025
6.8%
3.7M shares
SC 13G/A · May 12, 2025
11.5%
6.3M shares
SC 13G/A · Apr 30, 2025
7.3%
4.0M shares
SC 13G/A · Apr 17, 2025
6.4%
3.5M shares
SC 13D/A · Feb 27, 2025
6.9%
4.0M shares
SC 13G/A · Feb 12, 2025
14.7%
8.0M shares
SC 13G · Jan 31, 2025
6.2%
3.3M shares
SC 13G · Nov 22, 2024
5.2%
2.8M shares
SC 13G/A · Nov 14, 2024
0.0%
0 shares
SC 13G/A · Nov 14, 2024
7.2%
3.9M shares
SC 13G/A · Nov 12, 2024
12.1%
6.5M shares
SC 13D · Nov 8, 2024
5.0%
2.9M shares
SC 13G/A · Nov 8, 2024
7.9%
4.2M shares
SC 13G/A · Oct 22, 2024
7.9%
4.2M shares
SC 13G/A · Apr 10, 2024
10.2%
5.4M shares
SR One Capital Management, LLC 2
SC 13D/A · Mar 25, 2024
4.4%
2.3M shares
SC 13G/A · Feb 14, 2024
0.0%
0 shares
SC 13G/A · Feb 14, 2024
8.8%
4.5M shares
Suvretta Capital Management, LLC
SC 13G/A · Feb 13, 2024
5.0%
2.4M shares
SC 13G · Jan 29, 2024
6.2%
3.0M shares
SC 13G/A · Dec 28, 2023
12.9%
6.7M shares
SR One Capital Management, LLC
SC 13D/A · Dec 18, 2023
6.5%
3.1M shares
New Enterprise Associates 15, L.P.
SC 13D/A · Jun 23, 2023
7.8%
3.7M shares
SR One Capital Management, LLC
SC 13D/A · Jun 2, 2023
8.2%
3.9M shares
SR One Capital Management, LLC
SC 13D/A · May 19, 2023
9.3%
4.5M shares
Cormorant Global Healthcare Master Fund, LP
SC 13G/A · Feb 14, 2023
4.7%
2.1M shares
SC 13G · Feb 14, 2023
5.5%
2.6M shares
Suvretta Capital Management, LLC
SC 13G/A · Feb 13, 2023
5.4%
2.4M shares
New Enterprise Associates 15, L.P.
SC 13D/A · Jan 24, 2023
10.8%
4.7M shares
SC 13G/A · Dec 12, 2022
4.0%
1.8M shares
SC 13G/A · Nov 28, 2022
5.7%
2.5M shares
Cormorant Global Healthcare Master Fund, LP
SC 13G · Aug 29, 2022
5.0%
2.2M shares
Suvretta Capital Management, LLC
SC 13G · Jun 27, 2022
5.8%
2.5M shares
SR One Capital Management, LLC
SC 13D/A · Jun 27, 2022
12.9%
5.5M shares
SR One Capital Management, LLC
SC 13D · Feb 17, 2022
15.8%
5.5M shares
New Enterprise Associates 15, L.P.
SC 13D · Feb 17, 2022
19.2%
6.4M shares