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Arcellx, Inc.

ACLXDelisted Apr 28, 2026
Industry
Biological Products, (No Diagnostic Substances)
SEC CIK
0001786205

Arcellx, Inc. was delisted on Apr 28, 2026; its insiders filed their last Form 4 on Apr 28, 2026; 240 institutions reported holding it in 13F filings for Q1 2026, worth $6.52B in total; Soros Fund Management was the only superinvestor holding it.

Open-market trades, last 90 days

Open-market purchases (P) and sales (S) by Arcellx, Inc. insiders, counted by Form 4 filing. Trades with a flagged price and duplicate filings are left out.

Open-market buys
0 filings
Open-market sells
0 filings
Insiders trading
0
Net value
$0
Purchases minus sales

Insider roster

Directors, officers and 10% owners who have filed a Form 4 for Arcellx, Inc., current and former, most recent filer first. Last reported holding is the position after the last non-derivative trade in their latest filing.

Insider roster for Arcellx, Inc.
NameTitleLast reported holdingLast filingFilings, past year
Galligan Andrew HDirector0IndirectApr 28, 20261
Lubner David CharlesDirector0Apr 28, 20262
Carroll JillDirector0IndirectApr 28, 20261
Elghandour RamiSEE REMARKS0IndirectApr 28, 20266
Behbahani AliDirector0IndirectApr 28, 20261
Ware Olivia CDirector0Apr 28, 20261
Patel KavitaDirector0Apr 28, 20261
Heery ChristopherCHIEF MEDICAL OFFICER0Apr 28, 20268
Gilson MichelleCHIEF FINANCIAL OFFICER0IndirectApr 28, 20269
Myers KristinDirector–Apr 28, 20261
Yoon DerekDirector–Jun 6, 20240
George Simeon10% Owner1,658,780IndirectMay 15, 20230
SR One Capital Fund I Aggregator LP10% Owner1,658,780IndirectMay 15, 20230
Sr One Capital Management, LLC10% Owner1,658,780IndirectMay 15, 20230
Sr One Capital Partners I, LP10% Owner1,658,780IndirectMay 15, 20230
SR One Co-Invest II, LLC10% Owner1,658,780IndirectMay 15, 20230
SR One Co-Invest II Manager, LLC10% Owner1,658,780IndirectMay 15, 20230
Sandell Scott D10% Owner0IndirectDec 27, 20220
NEA Partners 15, L.P.10% Owner0Dec 22, 20220
Nea 15 GP, LLC10% Owner0Dec 22, 20220
Baskett Forest10% Owner0IndirectDec 22, 20220
Sonsini Peter W.10% Owner12IndirectDec 22, 20220
Florence Anthony A. Jr.10% Owner0IndirectDec 22, 20220
New Enterprise Associates 15, L.P.10% Owner4,745,262Dec 22, 20220
Makhzoumi Mohamad10% Owner0IndirectDec 22, 20220
Novo Holdings A/S10% Owner4,016,878Feb 9, 20220
Williams Lewis TDirector2,095,114IndirectFeb 9, 20220

Insider trades

Each row adds up one type of transaction in one Form 4 filing. Only open-market purchases (P) and sales (S) are shown by default; use the filters to see grants, option exercises and other codes.

Insider trades
Filed (ET)Trade dateFiling delayInsiderTransactionSharesAvg priceValueHolding changeFlags
Aug 1, 2024 (view filing)Jul 302 daysPatel KavitaDirectorSSale−1.50K$61.96−$92.9K−100.0%0 after2 lots10b5-1
Aug 2, 2024 (view filing)Aug 11 dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−20.0K$60.42−$1.21M−68.3%9.28K after2 lots10b5-1
Aug 19, 2024 (view filing)Aug 163 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−5.45K$65.05−$354.5K−37.0%9.28K after10b5-1
Aug 22, 2024 (view filing)Aug 202 daysPatel KavitaDirectorSSale−1.50K$65.88−$98.8K−100.0%0 after10b5-1
Aug 28, 2024 (view filing)Aug 262 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−21.7K$71.12−$1.54M−70.0%9.28K after2 lots10b5-1
Sep 3, 2024 (view filing)Sep 3Same dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−27.5K$67.03−$1.84M−74.7%9.28K after5 lots10b5-1
Sep 6, 2024 (view filing)Sep 51 dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−3.42K$70.02−$239.5K−26.9%9.28K after10b5-1
Sep 12, 2024 (view filing)Sep 102 daysPatel KavitaDirectorSSale−1.50K$74.41−$111.6K−100.0%0 after10b5-1
Sep 17, 2024 (view filing)Sep 17Same dayGilson MichelleCHIEF FINANCIAL OFFICERSSale−15.0K$77.73−$1.17M−68.4%6.92K after2 lots10b5-1
Oct 3, 2024 (view filing)Oct 12 daysPatel KavitaDirectorSSale−1.50K$82.24−$123.4K−100.0%0 after10b5-1
Oct 22, 2024 (view filing)Oct 22Same dayPatel KavitaDirectorSSale−1.50K$89.69−$134.5K−100.0%0 after10b5-1
Nov 12, 2024 (view filing)Nov 7-115 daysPatel KavitaDirectorSSale−57.5K$103.90−$5.97M−100.0%0 after6 lots10b5-1
Nov 12, 2024 (view filing)Nov 84 daysGilson MichelleCHIEF FINANCIAL OFFICERSSale−12.4K$100.55−$1.24M−87.5%1.76K after3 lots10b5-1
Nov 14, 2024 (view filing)Nov 122 daysPatel KavitaDirectorSSale−1.50K$106.33−$159.5K−100.0%0 after10b5-1
Nov 19, 2024 (view filing)Nov 154 daysGilson MichelleCHIEF FINANCIAL OFFICERSSale−1.76K$88.87−$156.5K−100.0%0 after4 lots10b5-1
Dec 5, 2024 (view filing)Dec 32 daysPatel KavitaDirectorSSale−1.50K$91.88−$137.8K−100.0%0 after5 lots10b5-1
Dec 26, 2024 (view filing)Dec 242 daysPatel KavitaDirectorSSale−1.50K$76.97−$115.4K−100.0%0 after2 lots10b5-1
Jan 6, 2025 (view filing)Jan 3-63 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−6.36K$78.40−$498.8K−16.4%32.5K after2 lots
Jan 6, 2025 (view filing)Jan 3-63 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−6.36K$78.40−$498.8K−16.4%32.5K after2 lotsDuplicate filing
Jan 10, 2025 (view filing)Jan 3-67 daysElghandour RamiSEE REMARKSSSale−30.2K$78.36−$2.37M−17.0%147.6K afterAmended2 lots
Jan 10, 2025 (view filing)Jan 3-67 daysGilson MichelleCHIEF FINANCIAL OFFICERSSale−11.2K$78.36−$881.0K−29.0%27.6K afterAmended2 lots
Jan 10, 2025 (view filing)Jan 3-67 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−5.95K$78.36−$466.2K−15.3%32.9K afterAmended2 lots
Jan 10, 2025 (view filing)Jan 7-83 daysElghandour RamiSEE REMARKSSSale−30.3K$74.69−$2.26M−20.5%117.3K after2 lots
Jan 10, 2025 (view filing)Jan 7-83 daysGilson MichelleCHIEF FINANCIAL OFFICERSSale−18.0K$75.24−$1.36M−65.3%9.58K after6 lots10b5-1
Jan 10, 2025 (view filing)Jan 7-83 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−7.78K$74.69−$581.3K−23.7%25.1K after2 lots
Jan 14, 2025 (view filing)Jan 14Same dayPatel KavitaDirectorSSale−1.50K$65.87−$98.8K−100.0%0 after3 lots10b5-1
Feb 4, 2025 (view filing)Feb 4Same dayPatel KavitaDirectorSSale−1.50K$64.57−$96.9K−100.0%0 after10b5-1
Feb 24, 2025 (view filing)Feb 24Same dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−10.2K$63.79−$647.8K−21.3%37.5K after3 lots
Feb 25, 2025 (view filing)Feb 25Same dayPatel KavitaDirectorSSale−1.50K$63.16−$94.7K−100.0%0 after10b5-1
Feb 26, 2025 (view filing)Feb 26Same dayElghandour RamiSEE REMARKSSSale−38.3K$62.03−$2.38M−20.4%149.2K after3 lots
Mar 18, 2025 (view filing)Mar 18Same dayPatel KavitaDirectorSSale−1.50K$71.64−$107.5K−100.0%0 after10b5-1
Apr 8, 2025 (view filing)Apr 8Same dayPatel KavitaDirectorSSale−1.50K$57.50−$86.3K−100.0%0 after10b5-1
Apr 29, 2025 (view filing)Apr 29Same dayPatel KavitaDirectorSSale−1.50K$64.20−$96.3K−100.0%0 after10b5-1
May 20, 2025 (view filing)May 20Same dayPatel KavitaDirectorSSale−1.50K$58.43−$87.6K−100.0%0 after10b5-1
May 28, 2025 (view filing)May 271 dayGilson MichelleCHIEF FINANCIAL OFFICERSSale−12.2K$64.14−$784.8K−38.2%19.8K after2 lots
Jun 11, 2025 (view filing)Jun 101 dayPatel KavitaDirectorSSale−1.50K$67.36−$101.0K−100.0%0 after10b5-1
Sep 19, 2025 (view filing)Sep 18-191 dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−3.64K$80.01−$291.5K−9.6%34.1K after2 lots10b5-1
Sep 26, 2025 (view filing)Sep 26Same dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−12.4K$80.12−$993.2K−36.3%21.7K after10b5-1
Sep 29, 2025 (view filing)Sep 29Same dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−73$80.16−$5.85K−0.3%21.7K after10b5-1
Sep 30, 2025 (view filing)Sep 30Same dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−21.0K$81.28−$1.71M−97.1%624 after3 lots10b5-1
Oct 6, 2025 (view filing)Oct 3-63 daysGilson MichelleCHIEF FINANCIAL OFFICERSSale−5.95K$86.04−$511.6K−30.1%13.8K after2 lots10b5-1
Oct 15, 2025 (view filing)Oct 15Same dayGilson MichelleCHIEF FINANCIAL OFFICERSSale−5.36K$91.04−$488.3K−38.8%8.47K after10b5-1
Nov 17, 2025 (view filing)Nov 17Same dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−340$90.00−$30.6K−54.5%284 after10b5-1
Jan 12, 2026 (view filing)Jan 12Same dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−6.13K$64.15−$393.3K−14.2%37.1K after
Jan 13, 2026 (view filing)Jan 13Same dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−7.44K$65.51−$487.2K−20.1%29.6K after
Jan 14, 2026 (view filing)Jan 14Same dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−5.88K$68.51−$403.0K−19.9%23.7K after
Jan 20, 2026 (view filing)Jan 20Same dayLubner David CharlesDirectorSSale−6.00K$75.00−$450.0K−21.7%21.7K after10b5-1
Feb 18, 2026 (view filing)Feb 171 dayGilson MichelleCHIEF FINANCIAL OFFICERSSale−11.3K$69.50−$784.8K−17.4%53.5K after2 lots
Feb 19, 2026 (view filing)Feb 19Same dayGilson MichelleCHIEF FINANCIAL OFFICERSSale−8.38K$68.29−$572.6K−15.7%45.2K after3 lots
Feb 25, 2026 (view filing)Feb 25Same dayGilson MichelleCHIEF FINANCIAL OFFICERSSale−11.2K$113.82−$1.28M−24.8%33.9K after