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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
Feb 9, 2022 (view filing)Feb 81 dayNovo Holdings A/S10% OwnerPPurchase+833.3K$15.00+$12.5M+26.2%4.02M after
Feb 9, 2022 (view filing)Feb 81 dayCarroll JillDirectorPPurchase+1.67M$15.00+$25.0M+454.7%2.03M after2 lots
Feb 9, 2022 (view filing)6:18 PM ETFeb 81 daySandell Scott D and 7 others10% OwnerPPurchase+1.58M$15.00+$23.7M+32.6%6.43M after
Feb 10, 2022 (view filing)8:41 AM ETFeb 82 daysGeorge Simeon and 5 others10% OwnerPPurchase+1.67M$15.00+$25.0M+454.7%2.03M after2 lotsDuplicate filing
Jun 23, 2022 (view filing)5:10 PM ETJun 212 daysSandell Scott D and 7 others10% OwnerPPurchase+312.5K$16.00+$5.00M+4.9%6.75M after
Dec 14, 2022 (view filing)Dec 131 dayHeery ChristopherChief Medical OfficerSSale−12.5K$30.03−$375.4K−100.0%0 after
Dec 22, 2022 (view filing)Dec 22Same dayBaskett Forest10% OwnerSSale−1.63K$31.45−$51.2K−100.0%0 after
Dec 22, 2022 (view filing)Dec 211 dayFlorence Anthony A. Jr.10% OwnerSSale+179$30.74+$5.50KNew position0 after
Dec 22, 2022 (view filing)Dec 211 dayMakhzoumi Mohamad10% OwnerSSale−179$30.74−$5.50K−100.0%0 after
Dec 22, 2022 (view filing)Dec 211 daySandell Scott D10% OwnerSSale−179$30.74−$5.50K−100.0%0 afterDuplicate filing
Dec 27, 2022 (view filing)Dec 234 daysSandell Scott D10% OwnerSSale−390$31.67−$12.4K−100.0%0 after2 lots
Jan 5, 2023 (view filing)Jan 32 daysHeery ChristopherChief Medical OfficerSSale−2.50K$31.11−$77.8K−100.0%0 after
Feb 7, 2023 (view filing)Feb 34 daysHeery ChristopherChief Medical OfficerSSale−1.25K$35.11−$44.1K−100.0%0 after
Feb 9, 2023 (view filing)Feb 9Same dayElghandour RamiSee RemarksSSale−31.4K$30.77−$967.5K−44.8%38.8K after
Feb 9, 2023 (view filing)Feb 9Same dayHeery ChristopherChief Medical OfficerSSale−6.97K$30.77−$214.3K−30.9%15.6K after
Apr 4, 2023 (view filing)Apr 31 dayHeery ChristopherChief Medical OfficerSSale−3.00K$30.70−$92.1K−16.1%15.6K after2 lots
Apr 20, 2023 (view filing)Apr 18-192 daysHeery ChristopherChief Medical OfficerSSale−21.6K$35.01−$757.6K−64.9%11.7K after2 lots
Apr 26, 2023 (view filing)Apr 242 daysHeery ChristopherChief Medical OfficerSSale−20.0K$40.00−$800.0K−63.1%11.7K after
May 5, 2023 (view filing)May 32 daysHeery ChristopherChief Medical OfficerSSale−3.00K$43.45−$130.3K−20.4%11.7K after2 lots
May 8, 2023 (view filing)May 53 daysHeery ChristopherChief Medical OfficerSSale−1.20K$45.00−$54.0K−10.3%10.5K after
May 11, 2023 (view filing)May 9-102 daysHeery ChristopherChief Medical OfficerSSale−2.70K$45.15−$121.8K−25.7%7.79K after2 lots
May 15, 2023 (view filing)May 114 daysCarroll JillDirectorSSale−638.4K$45.01−$28.7M−18.4%2.83M after2 lots
May 15, 2023 (view filing)6:16 PM ETMay 114 daysGeorge Simeon and 5 others10% OwnerSSale−1.01M$45.01−$45.6M−37.9%1.66M after4 lots
May 25, 2023 (view filing)May 24-251 dayGilson MichelleChief Financial OfficerSSale−14.7K$42.58−$626.2K−60.8%9.48K after3 lots
Jun 2, 2023 (view filing)May 31-Jun 12 daysCarroll JillDirectorSSale−340.7K$41.71−$14.2M−12.0%2.49M after2 lots
Jun 2, 2023 (view filing)May 312 daysElghandour RamiSee RemarksSSale−2.60K$44.27−$115.1K−6.7%36.2K after
Jul 5, 2023 (view filing)Jul 32 daysHeery ChristopherChief Medical OfficerSSale−3.00K$31.75−$95.3K−27.8%7.79K after
Aug 7, 2023 (view filing)Aug 43 daysHeery ChristopherChief Medical OfficerSSale−3.00K$35.38−$106.1K−27.8%7.79K after
Dec 18, 2023 (view filing)Dec 144 daysCarroll JillDirectorSSale−504.3K$49.13−$24.8M−20.3%1.98M after
Dec 19, 2023 (view filing)Dec 181 dayHeery ChristopherChief Medical OfficerSSale−120.0K$50.17−$6.02M−93.9%7.79K after3 lots
Jan 8, 2024 (view filing)Jan 44 daysElghandour RamiSee RemarksSSale−29.1K$55.27−$1.61M−32.6%60.2K after
Jan 8, 2024 (view filing)Jan 44 daysGilson MichelleChief Financial OfficerSSale−8.51K$55.27−$470.6K−34.3%16.3K after
Jan 8, 2024 (view filing)Jan 44 daysHeery ChristopherChief Medical OfficerSSale−7.60K$55.27−$419.9K−29.8%17.9K after
Feb 12, 2024 (view filing)Feb 8-124 daysElghandour RamiSEE REMARKSSSale−38.1K$63.33−$2.41M−29.2%92.3K after3 lots
Feb 12, 2024 (view filing)Feb 8-124 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−10.1K$63.33−$640.3K−25.0%30.3K after3 lots
Mar 18, 2024 (view filing)Mar 153 daysWare Olivia CDirectorSSale−9.00K$70.40−$633.6K−100.0%0 after3 lots10b5-1
Mar 18, 2024 (view filing)Mar 18Same dayGilson MichelleCHIEF FINANCIAL OFFICERSSale−6.83K$69.34−$473.3K−41.8%9.48K after2 lots10b5-1
Mar 25, 2024 (view filing)Mar 214 daysCarroll JillDirectorSSale−504.3K$70.55−$35.6M−25.4%1.48M after
Mar 26, 2024 (view filing)Mar 22-264 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−46.8K$70.05−$3.28M−84.0%8.94K after7 lots10b5-1
Apr 3, 2024 (view filing)Apr 12 daysElghandour RamiSEE REMARKSSSale−23.1K$67.09−$1.55M−25.0%69.3K after3 lots10b5-1
Apr 18, 2024 (view filing)Apr 162 daysWare Olivia CDirectorSSale−9.40K$55.55−$522.2K−100.0%0 after2 lots10b5-1
May 3, 2024 (view filing)May 12 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−18.2K$51.33−$932.6K−67.0%8.94K after4 lots10b5-1
May 24, 2024 (view filing)May 24Same dayGilson MichelleCHIEF FINANCIAL OFFICERSSale−12.1K$50.71−$614.7K−38.0%19.8K after
Jun 14, 2024 (view filing)Jun 122 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−20.0K$55.13−$1.10M−68.3%9.28K after2 lots10b5-1
Jun 28, 2024 (view filing)Jun 262 daysGilson MichelleCHIEF FINANCIAL OFFICERSSale−12.9K$53.70−$691.6K−65.1%6.92K after2 lots10b5-1
Jun 28, 2024 (view filing)Jun 271 dayPatel KavitaDirectorSSale−10.0K$54.27−$542.7K−100.0%0 after2 lots10b5-1
Jul 3, 2024 (view filing)Jul 12 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−20.0K$55.39−$1.11M−68.3%9.28K after2 lots10b5-1
Jul 11, 2024 (view filing)Jul 92 daysPatel KavitaDirectorSSale−1.50K$56.63−$84.9K−100.0%0 after2 lots10b5-1
Jul 12, 2024 (view filing)Jul 11-121 dayHeery ChristopherCHIEF MEDICAL OFFICERSSale−5.45K$60.08−$327.5K−37.0%9.28K after2 lots10b5-1
Jul 18, 2024 (view filing)Jul 162 daysHeery ChristopherCHIEF MEDICAL OFFICERSSale−10.9K$65.30−$711.8K−54.0%9.28K after10b5-1