SEC ownership of Telesat Corp

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001845840.

Comparable stake leader

MHR FUND MANAGEMENT LLC

Disclosed value leader

PUBLIC SECTOR PENSION INVESTMENT BOARD

Comparable rows

50/50

Latest evidence

08 Jul 2026

Top shareholders Insider holders Latest transactions

Public ticker: TSAT on Nasdaq
Parsed ownership sources: 13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
Largest SEC-reported holder: MHR FUND MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
Comparable ownership rows: 50 of 50
Meaning: Rows with safely comparable ownership %
Latest 13D/G holder: MHR FUND MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
Latest parsed ownership date: 08 Jul 2026
Freshness: Most recent filing date in this holder set
Issuer CIK: 0001845840
Issuer location: Ottawa, Ontario, Canada

Ownership snapshot

Top shareholders of Telesat Corp (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

MHR FUND MANAGEMENT LLC

Disclosed value leader

PUBLIC SECTOR PENSION INV...

Comparable rows

50/50

Latest evidence

08 Jul 2026

13D/G 13F 3/4/5 Lead comparable stake: 36% 13D/G row: MHR FUND MANAGEMENT LLC Showing 1-8 of 50 holder rows.

Quick read

MHR FUND MANAGEMENT LLC leads the comparable SEC ownership view at 36%.

50 of 50 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 MHR FUND MANAGEMENT LLC's linked filing trail.

Comparable ownership Top 5

MHR FUND MANAGEMENT LLC 36%

GAMCO INVESTORS, INC. ET AL 12%

Greywolf Capital Management LP 6.2%

Daniel Lau 4.3%

Heard Capital LLC 4.2%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
MHR FUND MANAGEMENT LLC	13D/G 13F MARK H. RACHESKY, M.D. · Company 13D/G 13F	36%	$916,029,252 18,096,228 shares	$0	08 Jul 2026
GAMCO INVESTORS, INC. ET AL	13F 13D/G 3/4/5 Company · GAMCO Asset Management Inc. · 10%+ Owner 13F 13D/G 3/4/5	12% from 13D/G	$87,237,749 1,723,385 shares	—	30 Jun 2026
Greywolf Capital Management LP	13D/G Greywolf Opportunities Master Fund II LP 13D/G	6.2%	$13,519,256 860,551 shares	$0	31 Dec 2024
Daniel Lau	13D/G 13D/G	4.3%	$9,777,118 622,350 shares	$0	31 Mar 2025
Heard Capital LLC	13D/G 13F Company 13D/G 13F	4.2%	$27,445,122 610,570 shares	-$27,723,946	31 Mar 2026
PUBLIC SECTOR PENSION INVESTMENT BOARD	13F Company 13F	36%	$921,851,096 18,211,203 shares	—	30 Jun 2026
GABELLI FUNDS LLC	13F Company 13F	1.4%	$36,258,144 716,281 shares	—	30 Jun 2026
MILLENNIUM MANAGEMENT LLC	13F Company 13F	1.1%	$27,551,049 544,272 shares	—	30 Jun 2026

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.

Forms 3/4/5 flow

Insider trading overview

Insider buy and sell flow is broadly balanced over the last 12 months. No Buy or Sell transactions have been reported since 22 Aug 2025.

Buys

Insiders: 0

Sells

Insiders: 0

Net

Shares: 0

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 0 Shares: 0

Window (months)	Buy value	Sell value	Net value
0-3	$0	$0	$0
3-6	$0	$0	$0
6-9	$0	$0	$0
9-12	$0	$0	$0

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-1 of 1 reporting-owner rows connected to Telesat Corp. Open a relationship link for the CIK-to-CIK filing trail.

Rows

Largest Forms 3/4/5 holder

GAMCO INVESTORS, INC. ET AL

Net 12M change

Latest report

04 Aug 2023

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
GAMCO INVESTORS, INC. ET AL	10%+ Owner				Mixed	04 Aug 2023

Recent insider transactions for Telesat Corp

Showing up to 300 recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	SEC-reported value	SEC-reported price	Shares	Shares owned	Date	Ownership
No insider transactions were found in the last 12 months for this issuer.

^* marks a reported price that did not pass the local price check.