Parallax Volatility Advisers, L.P.
Position in IMSR — Terrestrial Energy Inc. /DE/
CIK 1521001
San Francisco, CA
Position in IMSR
as of Jun 30, 2026
· filed Aug 14, 2026
Position Value
$485,107
New position
Shares Held
68,518
first reported quarter
Ownership
0.065%
of shares outstanding
% of Portfolio
0.02%
of 13F equity value
Holder Rank
#46
of 108 holders
Holding Since
Jun 2026
1 quarter on record
Voting authority
Sole 100%
Shared 0%
None 0%
Derivatives in IMSR
reported options exposure · as of Jun 30, 2026CallValue
$0
CallShares
0
PutValue
$1,840,800
PutShares
260,000
Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.
Position in Utilities - Regulated Electric
Utilities · as of Jun 30, 2026Parallax Volatility Advisers, L.P. holds $10,432,062 across 11 Utilities - Regulated Electric names. IMSR ranks #6 (4.7% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | SO |
Southern Co
|
46,762 | $4,475,591 | |
| 2 | AEP |
American Electric Power Co Inc
|
14,412 | $1,971,705 | |
| 3 | EXC |
Exelon Corp
|
23,792 | $1,109,183 | |
| 4 | CNP |
Centerpoint Energy Inc
|
21,106 | $929,508 | |
| 5 | XEL |
Xcel Energy Inc
|
10,728 | $861,458 | |
| 6 | IMSR |
Terrestrial Energy Inc. /DE/
This page
|
68,518 | $485,107 | |
| 7 | EIX |
Edison International
|
4,446 | $331,004 | |
| 8 | AEE |
Ameren Corp
|
2,370 | $267,904 |
All Filings in IMSR
Export CSV
2 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-06-30 | $485,107 | 68,518 | Shares | Sole | 2026-08-14 | |
| 2026-06-30 | $1,840,800 | 260,000 | Put | Sole | 2026-08-14 | |
| No filing history on record for this holder in this stock. | ||||||