Arcellx, Inc.
Total Trades
138
Buys
5
Sells
77
Largest Trade
N/A
Insiders
14
Institutional Funds
170
Inst. Value
$1M+
Activist Filings
49
Insider Trades
| Insider | Title | Type | Value | Shares | Price | Date |
|---|---|---|---|---|---|---|
| Elghandour Rami | SEE REMARKS | SELL | $1M+ | 90K | $113.92 | Feb 28, 2026 |
| Elghandour Rami | SEE REMARKS | EXERCISE | N/A | 165K | — | Feb 28, 2026 |
| Gilson Michelle | CHIEF FINANCIAL OF… | EXERCISE | N/A | 21K | — | Feb 26, 2026 |
| Gilson Michelle | CHIEF FINANCIAL OF… | SELL | $1M+ | 11K | $113.82 | Feb 26, 2026 |
| Gilson Michelle | CHIEF FINANCIAL OF… | EXERCISE | N/A | 20K | — | Feb 18, 2026 |
| Gilson Michelle | CHIEF FINANCIAL OF… | SELL | $500K+ | 11K | $69.51 | Feb 18, 2026 |
| Lubner David Charles | Director | SELL | $100K–$500K | 6K | $75.00 | Jan 21, 2026 |
| Lubner David Charles | Director | EXERCISE | $15K–$50K | 6K | $6.28 | Jan 21, 2026 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | N/A | 13K | — | Jan 15, 2026 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $100K–$500K | 6K | $68.51 | Jan 15, 2026 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $100K–$500K | 7K | $65.51 | Jan 14, 2026 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | N/A | 17K | — | Jan 14, 2026 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | N/A | 13K | — | Jan 13, 2026 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $100K–$500K | 6K | $64.15 | Jan 13, 2026 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $15K–$50K | 340 | $90.00 | Nov 18, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $1M+ | 21K | $81.28 | Oct 1, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $1K–$15K | 73 | $80.16 | Sep 29, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $500K+ | 12K | $80.12 | Sep 26, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $100K–$500K | 4K | $80.01 | Sep 19, 2025 |
| Patel Kavita | Director | SELL | $100K–$500K | 2K | $67.36 | Jun 11, 2025 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Jun 11, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OF… | EXERCISE | N/A | 22K | — | May 29, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OF… | SELL | $500K+ | 12K | $64.14 | May 29, 2025 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | May 20, 2025 |
| Patel Kavita | Director | SELL | $50K–$100K | 2K | $58.43 | May 20, 2025 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Apr 29, 2025 |
| Patel Kavita | Director | SELL | $50K–$100K | 2K | $64.20 | Apr 29, 2025 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Apr 8, 2025 |
| Patel Kavita | Director | SELL | $50K–$100K | 2K | $57.50 | Apr 8, 2025 |
| Patel Kavita | Director | SELL | $100K–$500K | 2K | $71.64 | Mar 18, 2025 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Mar 18, 2025 |
| Elghandour Rami | SEE REMARKS | EXERCISE | N/A | 70K | — | Feb 27, 2025 |
| Elghandour Rami | SEE REMARKS | SELL | $1M+ | 38K | $62.02 | Feb 27, 2025 |
| Patel Kavita | Director | SELL | $50K–$100K | 2K | $63.16 | Feb 26, 2025 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Feb 26, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | N/A | 23K | — | Feb 25, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $500K+ | 10K | $63.79 | Feb 25, 2025 |
| Patel Kavita | Director | EXERCISE | $1K–$15K | 2K | $6.66 | Jan 15, 2025 |
| Patel Kavita | Director | SELL | $50K–$100K | 2K | $65.87 | Jan 15, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $500K+ | 8K | $74.69 | Jan 11, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | N/A | 17K | — | Jan 11, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OF… | EXERCISE | N/A | 15K | — | Jan 11, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OF… | SELL | $1M+ | 18K | $75.24 | Jan 11, 2025 |
| Elghandour Rami | SEE REMARKS | EXERCISE | N/A | 53K | — | Jan 11, 2025 |
| Elghandour Rami | SEE REMARKS | SELL | $1M+ | 30K | $74.69 | Jan 11, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OF… | EXERCISE | N/A | 36K | — | Jan 7, 2025 |
| Gilson Michelle | CHIEF FINANCIAL OF… | SELL | $500K+ | 11K | $78.40 | Jan 7, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | EXERCISE | N/A | 30K | — | Jan 7, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $100K–$500K | 6K | $78.40 | Jan 7, 2025 |
| Heery Christopher | CHIEF MEDICAL OFFI… | SELL | $100K–$500K | 6K | $78.40 | Jan 7, 2025 |
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
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