Insiders · IMSR

IMSR insider transactions

Terrestrial Energy Inc. (IMSR) Form 4 insider transactions - real-time wire coverage of every officer, director, and 10% owner trade.

IMSR insiders

Everyone who has filed a Form 3, 4, 5 or 144 at Terrestrial Energy Inc., latest first. Follow anyone to get their next filing.

• Pamela Beth CowanEVP, Engineering, since July 2026
• Kathryn Ann McCarthyDirector, since July 2026
• Steven M. MillsapGeneral Counsel, since October 2025
• Brian Patrick ThrasherChief Financial Officer, since October 2025
• William F. SmithChief Operating Officer, since October 2025
• David Michael LeBlancChief Technology Officer, Director, since October 2025
• Roberto Marco Sella10% owner, since October 2025
• William D JohnsonDirector, since October 2025
• Frederick W BuckmanDirector, since October 2025
• Robert Wood JonesDirector, since October 2025
• David John HillDirector, since October 2025
• Charles G PardeeDirector, since October 2025
• John Hugh MacDiarmidDirector, since October 2025
• Shawn MatthewsDirector
• Simon IrishChief Executive Officer, Director, since October 2025
• Michael J ConnorFormer Director
• Andrew Scott BrennerFormer Director
• Jacob LovelessFormer Director

Recent Form 3, 4, and 5 filings for IMSR

• 10d
  Chief Executive Officer Irish Simon converted options into 55,432 shares, increasing direct ownership by 2% to 2,879,846 units (SEC Form 4)

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 13d
  SEC Form 4 filed by Terrestrial Energy Inc.

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 18d
  SEC Form 4 filed by Terrestrial Energy Inc.

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 18d
  SEC Form 3 filed by Terrestrial Energy Inc.

  3 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 24d
  Director Pardee Charles G bought $22,125 worth of shares (7,500 units at $2.95) (SEC Form 4)

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 26d
  Chief Executive Officer Irish Simon bought $50,818 worth of shares (16,900 units at $3.01) (SEC Form 4)

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 26d
  Director Buckman Frederick W bought $39,336 worth of shares (12,000 units at $3.28) (SEC Form 4)

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 100d
  SEC Form 4 filed by EVP, Engineering Cowan Pamela Beth

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 100d
  SEC Form 3 filed by new insider Cowan Pamela Beth

  3 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 104d
  SEC Form 4 filed by Director Mccarthy Kathryn Ann

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 104d
  SEC Form 3 filed by new insider Mccarthy Kathryn Ann

  3 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 208d
  SEC Form 4 filed by Millsap Steven M.

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 208d
  SEC Form 4 filed by Leblanc David Michael

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 208d
  SEC Form 4 filed by Smith William F.

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 208d
  SEC Form 4 filed by Thrasher Brian Patrick

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 264d
  Amendment: New insider Sella Roberto Marco claimed ownership of 13,885,611 shares (SEC Form 3)

  3/A - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 290d
  New insider Sella Roberto Marco claimed ownership of 13,885,611 shares (SEC Form 3)

  3 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 303d
  Amendment: SEC Form 4 filed by Director Johnson William D

  4/A - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 321d
  SEC Form 4 filed by Director Buckman Frederick W

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 321d
  SEC Form 4 filed by Director Johnson William D

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 321d
  SEC Form 4 filed by Director Jones Robert Wood

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 321d
  SEC Form 4 filed by Director Hill David John

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 321d
  SEC Form 4 filed by Director Pardee Charles G

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 321d
  SEC Form 4 filed by Director Macdiarmid John Hugh

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)
• 321d
  SEC Form 4 filed by Director Matthews Shawn

  4 - Terrestrial Energy Inc. /DE/ (0002019804) (Issuer)