Security key
881454110
Terrestrial Energy Inc. /DE/ - *W EXP 10/28/203 (IMSRW)
CUSIP: 881454110
Q4 2025 13F Holders as of 31 Dec 2025
- Security type / class
- Equity / *W EXP 10/28/203
- Total 13F shares
- 10,945,179
- Total 13F value
- $23,108,164
- Share change
- +10,861,577
- SEC-reported price per share
- $2.12
- Number of holders
- 27
- Value change
- +$22,930,928
- Number of buys
- 25
- Number of sells
- 1
Report period
Q4 2025
Institutions
27
Top holders
10
IMSRW full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q1 2026
Previous quarter: Q3 2025
Terrestrial Energy Inc. /DE/ SEC filings
Terrestrial Energy Inc. /DE/ company facts
Broader feeds
Reporting periods
Holder history for CUSIP 881454110
Recent filing periods:
Ownership snapshot
Top reported holders of IMSRW - Terrestrial Energy Inc. /DE/ - *W EXP 10/28/203 (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
Roberto Marco Sella
Disclosed value leader
Simon Irish
Comparable rows
15/15
Latest evidence
31 Dec 2025
13D/G
3/4/5
13F
Lead comparable stake: 14%
13D/G row: Roberto Marco Sella
Showing 1-6 of 15 holder rows.
Quick read
Roberto Marco Sella leads the comparable SEC ownership view at 14%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens Roberto Marco Sella's linked filing trail.
Comparable ownership
Top 5
Roberto Marco Sella
14%
Simon Irish
13%
David Michael LeBlanc
9.7%
BARCLAYS PLC
6.2%
First Trust Capital Management L.P.
4.7%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| Roberto Marco Sella |
13D/G
3/4/5
10%+ Owner
|
14%
|
$93,974,555
15,378,689 shares
|
$0 | 29 Oct 2025 |
| Simon Irish |
3/4/5
13D/G
Chief Executive Officer, Director
|
13%
from 13D/G
|
$98,684,142
5,333,007 shares
mixed-class rows
|
— | 28 Oct 2025 |
| David Michael LeBlanc |
13D/G
David LeBlanc
|
9.7%
|
—
11,400,410 shares
|
$0 | 28 Oct 2025 |
| BARCLAYS PLC |
13D/G
|
6.2%
|
$15,368,295
1,420,360 shares
|
$0 | 31 Dec 2024 |
| First Trust Capital Management L.P. |
13D/G
|
4.7%
|
$11,889,476
1,071,124 shares
|
-$7,523,891 | 30 Jun 2025 |
| LMR Partners LLP |
13F
13D/G
Company
|
4.1%
from 13D/G
|
$11,901,631
725,267 shares
|
— | 30 Sep 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q4 2025
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
27
Shares
10,945,179
Rows available
27
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q4 2025 vs Q3 2025 Across Filers
Q3 2025 holders
1
Q4 2025 holders
27
Holder diff
26
| Investor | Q3 2025 Shares | Q4 2025 Shares | Share Diff | Share Chg % | Q3 2025 value | Q4 2025 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend