International Stem Cell CORP (ISCO)

Latest Insider Confidence Score

2025Q4

50.0
Bearish

Company insider confidence (by quarter)

2006Q2 2025Q4

Largest shareholders

Insider Role (last 12 mo) Shares held Filed at
AR Partners LLC — 12,500,000 Mar 12, 2012
X-Master, Inc. — 8,000,000 Jan 24, 2013
Adams William B — 3,113,549 Jan 2, 2009
Kern Russell EVP and CSO 2,000,000 Nov 8, 2023
Aldrich Kenneth C Chair 2,000,000 Apr 9, 2012

Recent buy/sell transactions

Exec date Filing date Insider Role Signal Confidence Shares % of shares Under plan? Amount (USD)
Jun 17, 2025 Jun 20, 2025 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 17, 2025 Jun 20, 2025 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Jun 11, 2024 Jun 13, 2024 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 11, 2024 Jun 13, 2024 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Nov 6, 2023 Nov 8, 2023 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Nov 6, 2023 Nov 8, 2023 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
Jun 14, 2023 Jun 16, 2023 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 14, 2023 Jun 16, 2023 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Jun 14, 2023 Jun 16, 2023 Kern Russell EVP, PFO, and CSO Neutral 52.5 - 0.00% ✗ -
Jun 9, 2022 Jun 10, 2022 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 9, 2022 Jun 10, 2022 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Apr 25, 2022 Apr 26, 2022 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Apr 25, 2022 Apr 26, 2022 Kern Russell EVP, PFO, and CSO Neutral 52.5 - 0.00% ✗ -
Jun 9, 2021 Jun 11, 2021 Garnette Sophia VP, Legal Affairs & Operations Neutral 52.5 - 0.00% ✗ -
Jun 9, 2021 Jun 11, 2021 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
Jun 9, 2021 Jun 11, 2021 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Jun 9, 2021 Jun 11, 2021 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 9, 2021 Jun 11, 2021 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Jun 23, 2020 Jun 26, 2020 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 23, 2020 Jun 26, 2020 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Jun 23, 2020 Jun 24, 2020 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 23, 2020 Jun 24, 2020 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Jun 3, 2019 Jun 5, 2019 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 3, 2019 Jun 5, 2019 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Apr 18, 2019 Apr 22, 2019 MAIER PAUL V Director Sell 27.5 -1,350 -4.08% ✗ $1.7K
Feb 28, 2019 Mar 4, 2019 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Feb 28, 2019 Mar 4, 2019 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
Feb 28, 2019 Mar 4, 2019 Garnette Sophia VP, Legal Affairs & Operations Neutral 52.5 - 0.00% ✗ -
Jan 21, 2019 Jan 22, 2019 Semechkin Andrey CEO Buy 100.0 +599,222 17.44% ✗ $1M
Dec 3, 2018 Dec 6, 2018 Kern Russell EVP and CSO Sell 37.5 -1,800 -1.00% ✗ $3K
Dec 4, 2018 Dec 6, 2018 Garnette Sophia VP, Legal Affairs & Operations Sell 26.3 -10,636 -97.55% ✗ $16.4K
Oct 2, 2018 Oct 3, 2018 Garnette Sophia VP, Legal Affairs & Operation Sell 27.5 -1,494 -84.84% ✗ $2.4K
Aug 15, 2018 Sep 27, 2018 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2018 Sep 27, 2018 Garnette Sophia VP, Legal Affairs & Operation Neutral 52.5 - 0.00% ✗ -
Aug 15, 2018 Sep 27, 2018 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Aug 21, 2018 Aug 22, 2018 Garnette Sophia VP, Legal Affairs & Operation Sell 27.5 -4,900 -94.83% ✗ $7.7K
Aug 20, 2018 Aug 21, 2018 Garnette Sophia VP, Legal Affairs & Operation Sell 26.3 -9,304 -97.21% ✗ $14.7K
Aug 15, 2018 Aug 21, 2018 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2018 Aug 21, 2018 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2018 Aug 17, 2018 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2018 Aug 17, 2018 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
Aug 15, 2018 Aug 17, 2018 Garnette Sophia VP, Legal Affairs & Operation Neutral 52.5 - 0.00% ✗ -
Jul 13, 2018 Jul 17, 2018 Garnette Sophia VP, Legal Affairs & Operation Sell 27.5 -1,100 -80.47% ✗ $1.7K
Jul 10, 2018 Jul 12, 2018 Garnette Sophia VP, Legal Affairs & Operation Sell 27.5 -2,833 -91.39% ✗ $4.5K
Jun 26, 2018 Jun 28, 2018 Garnette Sophia VP, Legal Affairs & Operation Sell 27.5 -200 -42.83% ✗ $318
Jun 25, 2018 Jun 27, 2018 Garnette Sophia VP, Legal Affairs & Operation Sell 27.5 -1,200 -81.80% ✗ $1.9K
Jun 21, 2018 Jun 25, 2018 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 21, 2018 Jun 25, 2018 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Jun 21, 2018 Jun 25, 2018 CASAMENTO CHARLES J Director Neutral 90.0 +4,328 42.84% ✗ -
May 16, 2018 May 16, 2018 CASAMENTO CHARLES J Director Neutral 27.5 -12,280 -54.86% ✗ -
Mar 30, 2018 Apr 4, 2018 CASAMENTO CHARLES J Director Neutral 90.0 +5,527 32.79% ✗ -
Mar 30, 2018 Apr 3, 2018 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Mar 30, 2018 Apr 3, 2018 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Mar 12, 2018 Mar 14, 2018 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
Mar 12, 2018 Mar 14, 2018 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Feb 20, 2018 Feb 22, 2018 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Feb 20, 2018 Feb 22, 2018 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
Jan 9, 2018 Feb 1, 2018 CASAMENTO CHARLES J Director Neutral 27.5 -34,000 -66.86% ✗ -
Dec 29, 2017 Jan 2, 2018 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Dec 29, 2017 Jan 2, 2018 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Dec 29, 2017 Jan 2, 2018 CASAMENTO CHARLES J Director Neutral 90.0 +5,175 11.33% ✗ -
Dec 8, 2017 Dec 12, 2017 Don Wright Director Sell 26.3 -11,261 -70.38% ✗ $16.9K
Dec 7, 2017 Dec 8, 2017 Semechkin Andrey CEO Buy 100.0 +1,860,810 117.64% ✗ $3.3M
Dec 6, 2017 Dec 8, 2017 Don Wright Director Sell 26.3 -18,639 -53.81% ✗ $28K
Sep 29, 2017 Oct 2, 2017 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Sep 29, 2017 Oct 2, 2017 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Sep 29, 2017 Oct 2, 2017 CASAMENTO CHARLES J Director Neutral 90.0 +4,415 10.70% ✗ -
Aug 25, 2017 Aug 30, 2017 Stephens Jennifer CFO Neutral 52.5 - 0.00% ✗ -
Aug 30, 2017 Stephens Jennifer CFO Neutral 52.5 - 0.00% ✗ -
Jun 30, 2017 Jul 5, 2017 Don Wright Director Neutral 52.5 - 0.00% ✗ -
Jun 30, 2017 Jul 5, 2017 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
Jun 30, 2017 Jul 5, 2017 CASAMENTO CHARLES J Director Neutral 90.0 +7,127 20.88% ✗ -
May 31, 2017 Jun 2, 2017 Don Wright Director Neutral 52.5 - 0.00% ✗ -
May 31, 2017 Jun 2, 2017 MAIER PAUL V Director Neutral 52.5 - 0.00% ✗ -
May 31, 2017 Jun 2, 2017 CASAMENTO CHARLES J Director Neutral 52.5 - 0.00% ✗ -
May 31, 2017 Jun 1, 2017 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
May 31, 2017 Jun 1, 2017 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
May 31, 2017 Jun 1, 2017 Garnette Sophia VP, Legal Affairs & Operations Neutral 52.5 - 0.00% ✗ -
May 31, 2017 Jun 1, 2017 Ebrahimi Mahnaz CFO Neutral 52.5 - 0.00% ✗ -
May 22, 2017 May 24, 2017 Semechkin Andrey CEO Buy 60.0 +3,200 0.20% ✗ $5.2K
Mar 31, 2017 Apr 3, 2017 Don Wright Director Neutral 90.0 +4,642 15.47% ✗ -
Mar 31, 2017 Apr 3, 2017 MAIER PAUL V Director Neutral 90.0 +4,642 16.33% ✗ -
Mar 31, 2017 Apr 3, 2017 CASAMENTO CHARLES J Director Neutral 90.0 +4,642 15.74% ✗ -
Mar 20, 2017 Mar 22, 2017 Semechkin Andrey CEO Buy 68.8 +10,000 0.64% ✗ $16.7K
Mar 10, 2017 Mar 14, 2017 Semechkin Andrey CEO Buy 68.8 +8,100 0.52% ✗ $11.4K
Feb 10, 2017 Feb 14, 2017 Semechkin Andrey CEO Neutral 52.5 - 0.00% ✗ -
Feb 10, 2017 Feb 14, 2017 Kern Russell EVP and CSO Neutral 52.5 - 0.00% ✗ -
Feb 10, 2017 Feb 14, 2017 Garnette Sophia VP, Legal Affairs & Operation Neutral 52.5 - 0.00% ✗ -
Feb 10, 2017 Feb 14, 2017 Ebrahimi Mahnaz CFO Neutral 52.5 - 0.00% ✗ -
Dec 30, 2016 Dec 30, 2016 Don Wright Director Neutral 90.0 +7,523 33.47% ✗ -
Dec 30, 2016 Dec 30, 2016 MAIER PAUL V Director Neutral 90.0 +7,523 36.00% ✗ -
Dec 30, 2016 Dec 30, 2016 CASAMENTO CHARLES J Director Neutral 90.0 +7,523 34.24% ✗ -
Dec 8, 2016 Dec 8, 2016 Semechkin Andrey CEO Buy 97.5 +285,714 22.41% ✗ $500K
Oct 13, 2016 Oct 14, 2016 Don Wright Director Neutral 85.0 +1,334 6.31% ✗ -
Oct 13, 2016 Oct 14, 2016 MAIER PAUL V Director Neutral 85.0 +1,334 6.82% ✗ -
Oct 13, 2016 Oct 14, 2016 CASAMENTO CHARLES J Director Neutral 85.0 +1,334 6.46% ✗ -
Sep 30, 2016 Sep 30, 2016 Don Wright Director Neutral 90.0 +4,391 26.22% ✗ -
Sep 30, 2016 Sep 30, 2016 MAIER PAUL V Director Neutral 90.0 +4,391 28.95% ✗ -
Sep 30, 2016 Sep 30, 2016 CASAMENTO CHARLES J Director Neutral 90.0 +4,391 27.02% ✗ -
Sep 14, 2016 Sep 15, 2016 Semechkin Andrey CEO Buy 97.5 +200,000 18.61% ✗ $350K