Arcellx, Inc. (ACLX)

Latest Insider Confidence Score

2026Q1

44.4
Bearish

Company insider confidence (by quarter)

2022Q1 2026Q1

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
New Enterprise Associates 15, L.P. 10% Owner 4,745,262 Dec 22, 2022
George Simeon 10% Owner 1,658,780 May 15, 2023
Sr One Capital Management, Llc 10% Owner 1,658,780 May 15, 2023
Sr One Capital Partners I, Lp 10% Owner 1,658,780 May 15, 2023
SR One Capital Fund I Aggregator LP 10% Owner 1,658,780 May 15, 2023

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Mar 4, 2026 Mar 4, 2026 Elghandour Rami Officer Neutral 27.5 -101,164 -12.75% -
Jan 2, 2026 Feb 27, 2026 Elghandour Rami Officer Sell 35.0 -89,916 -11.49% $10.2M
Jan 6, 2026 Feb 25, 2026 Gilson Michelle CFO Sell 37.5 -11,219 -24.84% $1.3M
Jan 3, 2026 Feb 19, 2026 Gilson Michelle CFO Sell 40.0 -8,384 -15.66% $572.6K
Jan 2, 2026 Feb 18, 2026 Gilson Michelle CFO Sell 40.0 -11,291 -17.42% $784.8K
Feb 11, 2026 Feb 13, 2026 Elghandour Rami Officer Neutral 27.5 -198,000 -25.99% -
Feb 11, 2026 Feb 13, 2026 Elghandour Rami Officer Neutral 27.5 -218,500 -21.83% -
Jan 20, 2026 Jan 20, 2026 Lubner David Charles Director Sell 15.0 -6,000 -21.69% $450K
Jan 6, 2026 Jan 14, 2026 Heery Christopher CHIEF MEDICAL OFFICER Sell 40.0 -5,882 -19.85% $403K
Jan 3, 2026 Jan 13, 2026 Heery Christopher CHIEF MEDICAL OFFICER Sell 40.0 -7,437 -20.06% $487.2K
Jan 2, 2026 Jan 12, 2026 Heery Christopher CHIEF MEDICAL OFFICER Sell 40.0 -6,131 -14.19% $393.3K
Jan 2, 2026 Jan 6, 2026 Heery Christopher CHIEF MEDICAL OFFICER Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 Elghandour Rami Officer Neutral 52.5 - 0.00% -
Jan 2, 2026 Jan 6, 2026 Gilson Michelle CFO Neutral 52.5 - 0.00% -
Nov 17, 2025 Nov 17, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 13.8 -340 -54.49% $30.6K
Oct 15, 2025 Oct 15, 2025 Gilson Michelle CFO Sell 7.5 -5,364 -38.79% $488.3K
Oct 3, 2025 Oct 6, 2025 Gilson Michelle CFO Sell 7.5 -5,946 -30.07% $511.6K
Sep 30, 2025 Sep 30, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 5.0 -21,034 -97.12% $1.7M
Sep 29, 2025 Sep 29, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 53.8 -73 -0.34% $5.9K
Sep 26, 2025 Sep 26, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 7.5 -12,396 -36.32% $993.2K
Sep 18, 2025 Sep 19, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 26.3 -3,643 -9.65% $291.5K
Aug 28, 2025 Aug 29, 2025 Elghandour Rami Officer Sell 35.0 -546,938 -46.95% $38.4M
Aug 12, 2025 Aug 14, 2025 Behbahani Ali Director Neutral 90.0 +4,207 992.22% -
Jun 10, 2025 Jun 11, 2025 Patel Kavita Director Sell 10.0 -1,500 -100.00% $101K
May 29, 2025 May 30, 2025 Behbahani Ali Director Neutral 52.5 - 0.00% -
May 29, 2025 May 30, 2025 Galligan Andrew H Director Neutral 52.5 - 0.00% -
May 29, 2025 May 30, 2025 Patel Kavita Director Neutral 52.5 - 0.00% -
May 29, 2025 May 30, 2025 Myers Kristin Director Neutral 52.5 - 0.00% -
May 29, 2025 May 30, 2025 Ware Olivia C Director Neutral 52.5 - 0.00% -
May 29, 2025 May 30, 2025 Carroll Jill Director Neutral 52.5 - 0.00% -
May 29, 2025 May 30, 2025 Lubner David Charles Director Neutral 52.5 - 0.00% -
May 23, 2025 May 28, 2025 Gilson Michelle CFO Sell 40.0 -12,235 -38.22% $784.8K
May 20, 2025 May 20, 2025 Patel Kavita Director Sell 10.0 -1,500 -100.00% $87.6K
Apr 29, 2025 Apr 29, 2025 Patel Kavita Director Sell 10.0 -1,500 -100.00% $96.3K
Apr 8, 2025 Apr 8, 2025 Patel Kavita Director Sell 10.0 -1,500 -100.00% $86.3K
Mar 18, 2025 Mar 20, 2025 Myers Kristin Director Neutral 52.5 - 0.00% -
Mar 18, 2025 Mar 20, 2025 Galligan Andrew H Director Neutral 52.5 - 0.00% -
Mar 20, 2025 Myers Kristin Director Neutral 52.5 - 0.00% -
Mar 20, 2025 Galligan Andrew H Director Neutral 52.5 - 0.00% -
Mar 18, 2025 Mar 18, 2025 Patel Kavita Director Sell 10.0 -1,500 -100.00% $107.5K
Feb 27, 2025 Feb 27, 2025 Elghandour Rami Officer Neutral 90.0 +1,015,671 680.81% -
Feb 7, 2025 Feb 26, 2025 Elghandour Rami Officer Sell 37.5 -38,300 -20.43% $2.4M
Feb 25, 2025 Feb 25, 2025 Patel Kavita Director Sell 10.0 -1,500 -100.00% $94.7K
Feb 7, 2025 Feb 24, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 40.0 -10,155 -21.32% $647.8K
Feb 7, 2025 Feb 11, 2025 Heery Christopher CHIEF MEDICAL OFFICER Neutral 52.5 - 0.00% -
Feb 7, 2025 Feb 11, 2025 Elghandour Rami Officer Neutral 52.5 - 0.00% -
Feb 4, 2025 Feb 4, 2025 Patel Kavita Director Sell 10.0 -1,500 -100.00% $96.9K
Jan 14, 2025 Jan 14, 2025 Patel Kavita Director Sell 10.0 -1,500 -100.00% $98.8K
Jan 3, 2025 Jan 10, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 40.0 -7,783 -23.68% $581.3K
Jan 3, 2025 Jan 10, 2025 Gilson Michelle CFO Sell 5.0 -18,009 -65.27% $1.4M
Jan 3, 2025 Jan 10, 2025 Elghandour Rami Officer Sell 37.5 -30,311 -20.54% $2.3M
Jan 2, 2025 Jan 10, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 40.0 -5,950 -15.33% $466.2K
Jan 2, 2025 Jan 10, 2025 Gilson Michelle CFO Sell 40.0 -11,243 -28.95% $881K
Jan 2, 2025 Jan 10, 2025 Elghandour Rami Officer Sell 37.5 -30,223 -17.00% $2.4M
Jan 2, 2025 Jan 6, 2025 Gilson Michelle CFO Sell 40.0 -10,604 -27.31% $831.4K
Jan 2, 2025 Jan 6, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 40.0 -6,362 -16.39% $498.8K
Jan 2, 2025 Jan 6, 2025 Heery Christopher CHIEF MEDICAL OFFICER Sell 40.0 -6,362 -16.39% $498.8K
Jan 2, 2025 Jan 6, 2025 Elghandour Rami Officer Sell 37.5 -28,633 -16.10% $2.2M
Dec 24, 2024 Dec 26, 2024 Patel Kavita Director Sell 10.0 -1,500 -100.00% $115.5K
Dec 3, 2024 Dec 5, 2024 Patel Kavita Director Sell 10.0 -1,500 -100.00% $137.8K
Nov 15, 2024 Nov 19, 2024 Gilson Michelle CFO Sell 10.0 -1,761 -100.00% $156.5K
Nov 12, 2024 Nov 14, 2024 Patel Kavita Director Sell 10.0 -1,500 -100.00% $159.5K
Nov 8, 2024 Nov 12, 2024 Gilson Michelle CFO Sell 5.0 -12,354 -87.52% $1.2M
Nov 7, 2024 Nov 12, 2024 Patel Kavita Director Sell 3.8 -57,479 -50.36% $6M
Oct 22, 2024 Oct 22, 2024 Patel Kavita Director Sell 10.0 -1,500 -100.00% $134.5K
Oct 1, 2024 Oct 3, 2024 Patel Kavita Director Sell 10.0 -1,500 -100.00% $123.4K
Sep 17, 2024 Sep 17, 2024 Gilson Michelle CFO Sell 5.0 -15,000 -68.45% $1.2M
Sep 10, 2024 Sep 12, 2024 Patel Kavita Director Sell 10.0 -1,500 -100.00% $111.6K
Sep 5, 2024 Sep 6, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 10.0 -3,421 -26.94% $239.5K
Sep 3, 2024 Sep 3, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 5.0 -27,451 -74.74% $1.8M
Aug 26, 2024 Aug 28, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 5.0 -21,684 -70.03% $1.5M
Aug 20, 2024 Aug 22, 2024 Patel Kavita Director Sell 10.0 -1,500 -100.00% $98.8K
Aug 16, 2024 Aug 19, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 7.5 -5,450 -37.00% $354.5K
Aug 1, 2024 Aug 2, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 5.0 -20,000 -68.31% $1.2M
Jul 30, 2024 Aug 1, 2024 Patel Kavita Director Sell 10.0 -1,500 -100.00% $92.9K
Jul 16, 2024 Jul 18, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 7.5 -10,901 -54.02% $711.9K
Jul 11, 2024 Jul 12, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 12.5 -5,451 -22.71% $327.5K
Jul 9, 2024 Jul 11, 2024 Patel Kavita Director Sell 10.0 -1,500 -100.00% $84.9K
Jul 1, 2024 Jul 3, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 5.0 -20,000 -68.31% $1.1M
Jun 27, 2024 Jun 28, 2024 Patel Kavita Director Sell 7.5 -10,000 -100.00% $542.7K
Jun 26, 2024 Jun 28, 2024 Gilson Michelle CFO Sell 7.5 -12,877 -65.06% $691.5K
Jun 12, 2024 Jun 14, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 5.0 -20,000 -68.31% $1.1M
May 28, 2024 Jun 6, 2024 Behbahani Ali Director Neutral 52.5 - 0.00% -
May 28, 2024 Jun 6, 2024 Carroll Jill Director Neutral 52.5 - 0.00% -
May 28, 2024 Jun 6, 2024 Yoon Derek Director Neutral 52.5 - 0.00% -
May 28, 2024 Jun 6, 2024 Ware Olivia C Director Neutral 52.5 - 0.00% -
May 28, 2024 Jun 6, 2024 Patel Kavita Director Neutral 52.5 - 0.00% -
May 28, 2024 Jun 6, 2024 Lubner David Charles Director Neutral 52.5 - 0.00% -
May 23, 2024 May 24, 2024 Gilson Michelle CFO Sell 40.0 -12,121 -37.98% $614.7K
May 1, 2024 May 3, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 7.5 -18,168 -67.03% $932.6K
Apr 16, 2024 Apr 18, 2024 Ware Olivia C Director Sell 7.5 -9,402 -100.00% $522.3K
Apr 1, 2024 Apr 3, 2024 Elghandour Rami Officer Sell 5.0 -23,086 -25.00% $1.5M
Mar 22, 2024 Mar 26, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 5.0 -46,815 -31.05% $3.3M
Mar 21, 2024 Mar 25, 2024 Carroll Jill Director Sell 15.0 -504,263 -25.42% $35.6M
Mar 18, 2024 Mar 18, 2024 Gilson Michelle CFO Sell 7.5 -6,825 -41.85% $473.3K
Mar 15, 2024 Mar 18, 2024 Ware Olivia C Director Sell 7.5 -9,000 -100.00% $633.6K
Feb 8, 2024 Feb 12, 2024 Heery Christopher CHIEF MEDICAL OFFICER Sell 40.0 -10,111 -25.02% $640.4K
Feb 8, 2024 Feb 12, 2024 Elghandour Rami Officer Sell 37.5 -38,065 -29.19% $2.4M
Feb 7, 2024 Feb 9, 2024 Heery Christopher CHIEF MEDICAL OFFICER Neutral 52.5 - 0.00% -
Feb 7, 2024 Feb 9, 2024 Elghandour Rami Officer Neutral 52.5 - 0.00% -