Telesat Corporation - Class A Common Shares and Class B Variable Voting Shares (TSAT)
TSAT moved a median of +0.47% 30 minutes after news, and +0.64% by the close. How TSAT actually reacts to news — the realized, point-in-time move the market made, measured across 201 labeled events over the last three years with zero look-ahead.
TSAT’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | 0.00% | 43% | 185 |
| 30-min | +0.47% | 56% | 194 |
| 60-min | +0.18% | 53% | 199 |
| to close | +0.64% | 56% | 201 |
| Middle 50% of TSAT reactions | -1.02% to +2.14% |
|---|---|
| Median reaction (30-min) | +0.47% |
| Measured reactions | 201 |
Half of all Telesat Corporation - Class A Common Shares and Class B Variable Voting Shares news events land between -1.02% and +2.14% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
Email me when TSAT moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to TSAT's baseline. Nothing else.
Recent TSAT events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Orange and Telesat inaugurate Europe’s first Telesat Lightspeed Gateway in France | Press release | GlobeNewswire | +2.64% | +2.28% | |
| Telesat and SatPort Infrastructure sign global build-to-suit agreement to expand Telesat Lightspeed ground network | Press release | GlobeNewswire | -1.03% | -1.83% | |
| Telesat named to the TSX30, ranking among the top performing stocks on the Toronto Stock Exchange | Press release | GlobeNewswire | -0.27% | -1.44% | |
| Farcast completes Telesat Lightspeed antenna technology demonstration milestone | Press release | GlobeNewswire | -0.34% | -0.80% | |
| Telesat Government Solutions and Cailabs Collaborate on Secure Optical Connectivity for Government Missions | Press release | GlobeNewswire | +1.75% | +0.30% | |
| Form 6-K Telesat Corp For: Aug 13 | SEC filing · Form 6-K | SEC EDGAR | +3.58% | -8.25% | |
| Form 6-K Telesat Corp For: Jun 30 | SEC filing · Form 6-K | SEC EDGAR | +3.58% | -8.25% | |
| Telesat reports results for the three and six months ended June 30, 2026 | Press release | GlobeNewswire | +3.58% | -8.25% | |
| Form 6-K Telesat Corp For: Aug 04 | SEC filing · Form 6-K | SEC EDGAR | +2.16% | +26.97% | |
| Telesat secures $2.3 billion Arctic military satcom contract, expanding Telesat Lightspeed network and capacity by 44% | Press release | GlobeNewswire | +2.16% | +26.97% | |
| Telesat schedules second quarter 2026 earnings conference call for August 13, 2026 | Press release | GlobeNewswire | +0.01% | -1.99% | |
| Telesat prepared to execute FCC Upper C-band transition plan | Press release | GlobeNewswire | -2.83% | -0.19% | |
| Form 6-K Telesat Corp For: Jul 09 | SEC filing · Form 6-K | SEC EDGAR | -0.24% | -6.41% | |
| Telesat announces changes to Board of Directors | Press release | GlobeNewswire | -0.24% | -6.41% | |
| Canadian Armed Forces selects Telesat Lightspeed for Mil-Ka-band component of ESCP-P Arctic military communications program | Press release | GlobeNewswire | +5.05% | +4.89% | |
| Form 6-K Telesat Corp For: Jul 08 | SEC filing · Form 6-K | SEC EDGAR | +5.05% | +4.89% | |
| Telesat donates satellite capacity to support Venezuela’s recovery efforts | Press release | GlobeNewswire | +1.09% | -0.75% | |
| Form 6-K Telesat Corp For: Jun 05 | SEC filing · Form 6-K | SEC EDGAR | -5.82% | -20.40% | |
| Telesat announces results of 2026 Annual General Meeting of shareholders | Press release | GlobeNewswire | -5.82% | -20.40% | |
| Form 6-K Telesat Corp For: Mar 31 | SEC filing · Form 6-K | SEC EDGAR | +6.02% | +5.80% | |
| Form 6-K Telesat Corp For: May 05 | SEC filing · Form 6-K | SEC EDGAR | +6.02% | +5.80% | |
| Telesat reports results for the quarter ended March 31, 2026 | Press release | GlobeNewswire | +6.02% | +5.80% | |
| Form 6-K Telesat Corp For: Apr 28 | SEC filing · Form 6-K | SEC EDGAR | -0.43% | -3.62% | |
| Telesat schedules first quarter 2026 earnings conference call for May 5, 2026 | Press release | GlobeNewswire | -2.03% | -4.20% | |
| Northwestel and Telesat formalize Telesat Lightspeed agreement | Press release | GlobeNewswire | +1.37% | +4.92% | |
| Form 20-F Telesat Corp For: Dec 31 | SEC filing · Form 20-F | SEC EDGAR | +7.42% | +23.15% | |
| Form 6-K Telesat Corp For: Mar 17 | SEC filing · Form 6-K | SEC EDGAR | +7.42% | +23.15% | |
| Telesat adds military Ka-band to Telesat Lightspeed to meet strong global demand for defence and sovereignty requirements | Press release | GlobeNewswire | +7.42% | +23.15% | |
| Telesat reports results for the quarter and twelve months ended December 31, 2025 | Press release | GlobeNewswire | +7.42% | +23.15% | |
| Telesat schedules fourth quarter and full year 2025 earnings conference call for March 17, 2026 | Press release | GlobeNewswire | +2.54% | +1.07% | |
| Telesat advances Telesat Lightspeed terrestrial network with new Quebec and Saskatchewan landing station sites | Press release | GlobeNewswire | +1.03% | +8.68% | |
| Bronstein, Gewirtz & Grossman, LLC Initiates an Investigation into Allegations Against Telesat Corporation (TSAT) And Encourages Shareholders to Reach Out | Press release | ACCESS Newswire | — | +2.48% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Telesat Corporation (TSAT) and Encourages Shareholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.85% | +0.55% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Telesat Corporation (TSAT) Shareholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.97% | +2.16% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Telesat Corporation (TSAT) Stockholders to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.00% | -3.79% | |
| Telesat Corporation (TSAT) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Shareholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.20% | -0.18% | |
| Bronstein, Gewirtz & Grossman, LLC Is Investigating Telesat Corporation (TSAT) And Encourages Stockholders to Connect | Press release | ACCESS Newswire | — | -4.93% | |
| Telesat Corporation (TSAT) Investigation: Bronstein, Gewirtz & Grossman, LLC Encourages Stockholders to Contact the Firm to Learn More About the Investigation | Press release | ACCESS Newswire | +0.38% | +4.69% | |
| Bronstein, Gewirtz & Grossman, LLC Announces an Investigation Against Telesat Corporation (TSAT) and Encourages Stockholders to Learn More About the Investigation | Press release | ACCESS Newswire | -0.48% | -0.55% | |
| Bronstein, Gewirtz & Grossman, LLC Encourages Telesat Corporation (TSAT) Investors to Inquire about Securities Investigation | Press release | ACCESS Newswire | +0.15% | -6.21% | |
| Telesat and Hanwha sign strategic cooperation agreement for next-generation space and marine technologies | Press release | GlobeNewswire | -1.27% | +3.98% | |
| Form 6-K Telesat Corp For: Jan 22 | SEC filing · Form 6-K | SEC EDGAR | +0.66% | +13.67% | |
| Telesat Statement on Creditor Litigation | Press release | GlobeNewswire | -1.89% | +1.43% | |
| Form 6-K Telesat Corp For: Dec 09 | SEC filing · Form 6-K | SEC EDGAR | +1.25% | +9.04% | |
| Telesat enters strategic partnership with Government of Canada and MDA Space to deliver next-generation military satellite communications solution | Press release | GlobeNewswire | +1.05% | +13.24% | |
| Form 6-K Telesat Corp For: Nov 04 | SEC filing · Form 6-K | SEC EDGAR | -3.50% | -7.00% | |
| Form 6-K Telesat Corp For: Sep 30 | SEC filing · Form 6-K | SEC EDGAR | -3.50% | -7.00% | |
| Telesat invests US$5 million in Farcast to develop fully integrated User Terminals for Telesat Lightspeed satellite network | Press release | GlobeNewswire | -3.50% | -7.00% | |
| Telesat Reports Results for the Quarter and Nine Months Ended September 30, 2025 | Press release | GlobeNewswire | -3.50% | -7.00% | |
| Telesat schedules third quarter 2025 earnings conference call for November 4, 2025 | Press release | GlobeNewswire | +0.00% | -2.00% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the TSAT section they belong to.
Where else TSAT is measured.
TSAT earnings → · Analyst actions → · SEC filings →
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How the numbers are made.
How is Telesat Corporation - Class A Common Shares and Class B Variable Voting Shares's median reaction calculated?
Every labeled TSAT news event is measured from its own timestamp: the last trade before the news is the base price, and the move is read at fixed horizons — 30 minutes of trading, then the close. The median across 201 events is what this page reports. Point-in-time, zero look-ahead: no event borrows information from a later one.
What counts as a positive reaction?
Any event whose price move is above zero at the horizon, relative to the last trade before the news timestamp. 56% of TSAT's measured events are up at 30 minutes; the rest close the window flat or negative.
How often is this page updated?
The news table refreshes automatically as new events are labeled and priced. The reaction medians are re-pulled in batches from the dataset — the figures here are as of 2026-09-21.
Does TSAT's past reaction predict its next one?
No. These are realized facts about past events, not forecasts. They describe a distribution — they say nothing certain about any future move.