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IMSR · Terrestrial Energy Inc. /De/
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IMSR Terrestrial Energy (IMSR) Insider Trading, Ownership & Congress Trades

Industrials · Fabricated plate work (boiler shops) · CIK 0002019804
Quote by TradingView
Cluster · 3 insidersC-suite buying · 1
House members buying, 1 year
0
STOCK Act, US House only, disclosed up to 45 days after the trade
Funds added, last quarter
75
13F, latest reported quarter
Conversions, 180 days
1
Codes C/M, not in net · $0 priced

What the filings say about IMSR

Insiders, 180 days
+$112.3K net bought
3 buyers

Terrestrial Energy insider trades (Form 4)

Form 4 buys and sells (codes P and S). Grants, option exercises and conversions excluded.

Over the last 180 days, Terrestrial Energy Inc. /DE/ insiders bought a net $112.3K of stock across 3 Form 4 purchases and sales, with 3 insiders buying. Source: SEC Form 4 filings, as of 2026-10-28.

Insider
Filed
Shares
Value
Since filing
Pardee Charles G
Director
BUY
2026-10-15 SECtraded 2026-10-14
7,500
$22.1K
-3.6%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 52.6% of the 14,258 shares held after it.
  • 2 other insiders bought within 30 days.
  • 75 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director Pardee Charles G bought about $22.1K of IMSR on Oct 14, 2026; 2 other insiders bought within 30 days and 75 funds added in the latest 13F quarter.
Irish Simon
Chief Executive Officer
BUY
2026-10-14 SECtraded 2026-10-13
16,900
$50.8K
-8.7%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 0.7% of the 2,312,834 shares held after it.
  • 2 other insiders bought within 30 days.
  • 75 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Chief Executive Officer Irish Simon bought about $50.8K of IMSR on Oct 13, 2026, the largest insider purchase at the company on our record; 2 other insiders bought within 30 days and 75 funds added in the latest 13F quarter.
BUCKMAN FREDERICK W
Director
BUY
2026-10-13 SECtraded 2026-10-09
12,000
$39.3K
+0.0%
Context
  • First Form 4 purchase or sale (code P or S) here by this insider on our record.
  • The trade is 64.3% of the 18,669 shares held after it.
  • 2 other insiders bought within 30 days.
  • 75 funds added in the 13F quarter to Jun 30, 2026.
Insider activity: Director BUCKMAN FREDERICK W bought about $39.3K of IMSR on Oct 9, 2026, the largest insider purchase at the company on our record; 2 other insiders bought within 30 days and 75 funds added in the latest 13F quarter.
3 transactions on record · a thin record, read with care
Since filing: total return from the first close after the filing to the latest close, dividend-adjusted. Not a forecast.
Context lines are counts over the filings above and returns from our own price history, never a price level. Not investment advice.
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Seven facts, ranked against the sector · Rank is not a forecast
Insiders
net +$112.3K over 180 days
+$112.3K over 90 days
more than 86% of Industrials
Congress
no House purchase disclosed in the last 12 months
Funds
75 funds bought in last quarter
below 70% of Industrials
Revenue
no revenue reported in any filing
Margin
no margin: no revenue reported
Buybacks
no share repurchases reported
Short interest
15.8% of the float short (float per yahoo 2026-10-27) · 4.7 days to cover · settled 2026-10-15
more than 85% of Industrials
The situation: each line is one rule over one dataset
3 insiders independently bought a net $112.3K while the stock fell 61% over six months, with no planned sales queued.
What changed in the last 30 days
Oct 15Director Pardee Charles G bought $22.1K (Oct 14)
Oct 14Chief Executive Officer Irish Simon bought $50.8K (Oct 13)
Oct 13Director BUCKMAN FREDERICK W bought $39.3K (Oct 9)

Watch IMSR

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The year, with the filings on it
Total return over 12 months. Each marker is a filing; hover or tap one for the detail.
-84.6%12M
-85%-55%-24%+7%2025-102025-122026-022026-042026-062026-082026-10 2026-10-13 · Irish Simon bought $50.8K2026-10-09 · BUCKMAN FREDERICK W bought $39.3K2026-10-14 · Pardee Charles G bought $22.1K
Insider buy
Indexed to 100, dividend-adjusted, not a price chart. When a name files heavily, the largest trades are drawn first.

Who owns IMSR: institutional holders (13F)

13F holdings, latest reported quarter
EXCHANGE TRADED CONCEPTS, LLC
4,320,148 sh
$30.6M
VANGUARD CAPITAL MANAGEMENT LLC
3,414,196 sh
$24.2M
LMR Partners LLP
3,937,112 sh
$15.9M
UBS Group AG
1,772,173 sh
$12.5M
Hudson Bay Capital Management LP
1,885,467 sh
$8.6M

Congress trades in IMSR

No Congress trades reported
No House member has disclosed a trade in this stock. See what Congress is buying.

Activist and 5% holders (13D/13G)

No 5%+ ownership filings
Nobody has filed for crossing 5%. That is a fact, not missing data.

IMSR planned insider sales (Form 144)

No planned-sale notices
No insider has filed to sell. Watch this after a run-up.

IMSR mutual fund holders (N-PORT)

Funds ranked by the share of their own portfolio in this stock (N-PORT).
Range Nuclear Renaissance Index ETF
$19.8M position · as of 2026-05-31
2.2%
Pacer Data & Infrastructure Real Estate ETF
$2.9M position · as of 2026-07-31
0.8%
ALPS Nautilus SMR Nuclear & Technology ETF
$64.3K position · as of 2026-05-31
0.6%
Global X Uranium ETF
$18.9M position · as of 2026-07-31
0.3%
Carbon Collective Climate Solutions U.S. Equity ETF
$21.2K position · as of 2026-07-31
0.0%
Schwab U.S. Small-Cap ETF
$2.3M position · as of 2026-05-31
0.0%
SEC N-PORT, monthly, about 60 days late · funds ≥ $10M · % is the share of the fund's own portfolio
Live price
Daily candles from TradingView, under their licence. No filings marked.
Why this name is on the desk
3 insiders reported buying shares.
The record shows a net $112.3K bought by insiders over 180 days, 75 funds added last quarter. Each figure is a federal filing, dated the day it went public.
Backtest this pattern Open the screener
Same sector, ranked by filing activity
Sector by SEC SIC code
AXONTMOROKPKOHOFLXXPELSYMLIIITRIWABSNASXI

IMSR financials

Ratios from the company's XBRL filings, latest filings
Revenue, TTM
n/a
fewer than four consecutive quarters of revenue filed
Net margin, TTM
n/a
needs four consecutive quarters of both revenue and net income
Free cash flow, TTM
n/a
capex not filed for the four quarters
Debt to equity
0.00x
current debt only, 2024-06-30; equity 2026-06-30
Cash flow to debt
-159.23x
TTM operating cash flow over current debt only, 2024-06-30
Return on equity
n/a
the filed year and its quarters do not reconcile, so the trailing figure is withheld
Return on assets
n/a
the filed year and its quarters do not reconcile, so the trailing figure is withheld
Return on invested capital
n/a
the filed year and its quarters do not reconcile, so the trailing figure is withheld
Return on capital employed
n/a
the filed year and its quarters do not reconcile, so the trailing figure is withheld
P/E, trailing
n/a
fewer than four consecutive quarters of diluted EPS
Enterprise value
$180.9M
market value at close 2026-10-26 on 2026-08-11 shares, plus current debt only, 2024-06-30, minus cash 2026-06-30
FCF yield
n/a
capex not filed for the four quarters
PEG, trailing
n/a
fewer than four consecutive quarters of diluted EPS
Price as of 2026-10-26. Hover or tap a tile for its yearly and quarterly history.
Method
TTM is four consecutive fiscal quarters; Q4 is the year minus nine months when not filed. Returns use the average of opening and closing balances. EBIT is approximated by operating income. PEG uses trailing EPS growth.
Fundamentals
Annual figures from XBRL filings. Pick a past date to see them as known then.
2025-122024-12
Revenuen/a$248.4K
Operating income-$25.2M-$10.4M
Net income-$28.0M-$11.5M
EPS (diluted)-0.39-0.19
Operating cash flow-$16.5M-$8.2M
Cash$97.2M$3.0M
SEC XBRL, fiscal years, as known on 2026-10-28

IMSR Stock Sonar score 4/7 axes

Find similar shapesCompare

IMSR ranks highest on insider conviction (90th percentile) and financial health (45th), and lowest on risk and compliance (4th), among Industrials peers.

Financial health
45
Inputs
  • Debt to equity0.00x · 90 pct, sector of 215
  • Cash flow to debt-159.23x · 0 pct, sector of 173
Insider conviction
90
Inputs
  • Net Form 4 buying (codes P and S), 180d$112K · 86 pct, sector of 171
  • Insider buyers, 180d3 · 95 pct, sector of 173
Institutional and government
44
Inputs
  • Funds adding, latest quarter75 · 30 pct, sector of 200
  • Congress net buyers, 365dno Congress trades in 365 days
  • Federal contracts, 180dno federal contracts in 180 days
  • Lobbying spend, 4 quarters$407K · 58 pct, sector of 67
Risk and compliance
4
Inputs
  • Short interest, % of float+15.8% · 8 pct, sector of 271
  • Recalls per $1B revenue, 3yrevenue under $50M or not filed, so a count cannot be scaled to size
  • EPA cases per $1B revenue, 5yrevenue under $50M or not filed, so a count cannot be scaled to size
  • New text in Risk Factors, latest 10-K+99.9% · 0 pct, sector of 197
3 not measured: Profitability, Growth, US patents
  • Profitability needs 2 of 4 inputs, 0 present: the filed year and its quarters do not reconcile, so the trailing figure is withheld
  • Growth needs 1 of 2 inputs, 0 present: no backlog line filed, or no year-earlier backlog; no revenue for this year and the year before
  • US patents needs 1 of 2 inputs, 0 present: patent data not loaded yet

4 of 7 axes scored. Each is a percentile against sector peers (all companies when the sector is thin); higher is better. An unscored axis is unmeasured, not low. How it is scored

IMSR filings, in plain words

Are Terrestrial Energy insiders buying or selling IMSR?

In the 180 days to 2026-10-28, Terrestrial Energy insiders were net buyers, a net $112.3K across purchases and sales reported on Form 4, by 3 buyers.

Read the full summary

In the 180 days to 2026-10-28, Terrestrial Energy insiders were net buyers of IMSR, a net $112.3K across purchases and sales reported on Form 4 by 3 buyers. 3 different insiders reported purchases within the last 90 days, a cluster buy, which is rarer than a single purchase. Each figure is counted from SEC and House filings as of 2026-10-28, dated the day the filing was made public.

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