Iridium Communications Inc (IRDM)
IRDM moved a median of +0.19% 30 minutes after news, and +0.41% by the close. How IRDM actually reacts to news — the realized, point-in-time move the market made, measured across 651 labeled events over the last three years with zero look-ahead.
IRDM’s median reaction, across the day.
| Horizon | Median | % positive | Events |
|---|---|---|---|
| 5-min | +0.15% | 54% | 649 |
| 30-min | +0.19% | 60% | 649 |
| 60-min | +0.38% | 58% | 649 |
| to close | +0.41% | 57% | 649 |
| Middle 50% of IRDM reactions | -0.39% to +1.24% |
|---|---|
| Median reaction (30-min) | +0.19% |
| Measured reactions | 651 |
Half of all Iridium Communications Inc news events land between -0.39% and +1.24% at 30 minutes.
Reaction stats as of 2026-09-21. Newest measured event . Reaction = percent move vs. the price at the news timestamp.
How IRDM reacts, by analyst action.
| Event | Events | Median 30-min | % positive | Median to close |
|---|---|---|---|---|
| Analyst upgrades | 10 | +0.04% | 50% | -0.72% |
| Analyst downgrades | 24 | -0.18% | 42% | +0.50% |
| Rating reiterations | 35 | -0.16% | 46% | +0.03% |
Last 3 years, pulled 2026-09-21. Reaction = percent move vs. the price at the news timestamp. Counts and medians only. The same measurement runs across every name in the dataset. 3 further classes were observed with fewer than 10 measured events and are not published. See how IRDM ranks against every other measured name →
That’s how IRDM usually reacts — get an email when it moves on news →Email me when IRDM moves on news.
One email per qualifying move — the headline, the measured reaction, and how it compares to IRDM's baseline. Nothing else.
Recent IRDM events, each with its measured reaction.
| Date | Headline | Event | Source | 5-min | To close |
|---|---|---|---|---|---|
| Altair Semiconductor Integrates Iridium NTN Direct into ALT1350 and ALT1550 Cellular IoT Chipsets | Press release | Canada Newswire | -0.11% | -1.36% | |
| Form 8-K Iridium Communications For: Sep 24 | SEC filing · Form 8-K | SEC EDGAR | -0.66% | -0.87% | |
| Iridium Stockholders Approve Acquisition by Rocket Lab | Press release | PR Newswire | -0.66% | -0.87% | |
| Form 8-K Iridium Communications For: Sep 18 | SEC filing · Form 8-K | SEC EDGAR | +1.92% | +3.01% | |
| Form 8-K Iridium Communications For: Sep 15 | SEC filing · Form 8-K | SEC EDGAR | +0.82% | +1.93% | |
| Iridium, Deutsche Telekom IoT, and Toyota Demonstrate Voice Messaging over Satellite via Iridium NTN Direct | Press release | Canada Newswire | +0.62% | +0.84% | |
| Furuno Unveils New SOLION-100 Terminal for Iridium GMDSS | Press release | Canada Newswire | +0.98% | +0.99% | |
| Form DEFM14A Iridium Communications | SEC filing · Form DEFM14A | SEC EDGAR | -0.73% | +0.38% | |
| Token Appoints Former HSB CISO Monique Shivanandan to Its Board of Directors | Press release | Business Wire | +0.55% | +0.51% | |
| Iridium and SKYWAVE™, an ORBCOMM® company, Partner to Advance Global Industrial IoT for Heavy Equipment OEMs | Press release | PR Newswire | -0.92% | -0.59% | |
| Form 10-Q Iridium Communications For: Jun 30 | SEC filing · Form 10-Q | SEC EDGAR | +1.32% | -0.34% | |
| Form 8-K Iridium Communications For: Jul 22 | SEC filing · Form 8-K | SEC EDGAR | +1.32% | -0.34% | |
| Iridium Announces Second Quarter 2026 Results | Press release | PR Newswire | +1.32% | -0.34% | |
| IRDM Alert: Monsey Firm of Wohl & Fruchter Investigating Fairness of the Proposed Sale of Iridium Communications to Rocket Lab Corporation | Press release | GlobeNewswire | -0.75% | -3.02% | |
| Iridium Announces Commercial Availability of Iridium PNT ASIC, Bringing Resilient GNSS Protection to Devices Worldwide | Press release | Canada Newswire | +0.51% | -0.14% | |
| Iridium Announces Release Date for Second-Quarter 2026 Financial Results | Press release | PR Newswire | -0.44% | -0.32% | |
| Form 8-K Iridium Communications For: Jul 02 | SEC filing · Form 8-K | SEC EDGAR | +1.02% | -1.02% | |
| Iridium Completes Acquisition of Aireon | Press release | Canada Newswire | -0.58% | -2.29% | |
| Are SYNA, IRDM, TECH, PATK Obtaining Fair Deals for their Shareholders? | Press release | PR Newswire | +0.13% | +0.35% | |
| Are IRDM, TBPH, SYNA, TECH Obtaining Fair Deals for their Shareholders? | Press release | PR Newswire | -0.05% | +1.35% | |
| Form 8-K Iridium Communications For: Jun 28 | SEC filing · Form 8-K | SEC EDGAR | +1.48% | +5.73% | |
| IRDM Stock Alert: Halper Sadeh LLC is Investigating Whether Iridium Communications Inc. is Obtaining a Fair Price for its Shareholders | Press release | Business Wire | +0.20% | +3.16% | |
| Rocket Lab to Acquire Iridium in Historic Deal, Creating A Fully Vertically Integrated Space Powerhouse Primed for Growth | Press release | Canada Newswire | +1.48% | +5.73% | |
| Iridium NTN Direct Begins Live Testing with Mlink | Press release | Canada Newswire | -0.74% | -5.50% | |
| Iridium's Next-Generation Hybrid IoT Module and Development Kit are Now Commercially Available | Press release | Canada Newswire | +3.00% | +4.45% | |
| Form SD Iridium Communications | SEC filing · Form SD | SEC EDGAR | +1.34% | +5.71% | |
| Form 8-K Iridium Communications For: May 20 | SEC filing · Form 8-K | SEC EDGAR | -0.24% | +0.93% | |
| Form 8-K Iridium Communications For: May 13 | SEC filing · Form 8-K | SEC EDGAR | -0.05% | +0.91% | |
| Iridium to Acquire Aireon, Advancing its Strategy to Lead the Future of Aviation Safety | Press release | PR Newswire | -0.05% | +0.91% | |
| Form 10-Q Iridium Communications For: Mar 31 | SEC filing · Form 10-Q | SEC EDGAR | +6.07% | +7.12% | |
| Form 8-K Iridium Communications For: Apr 23 | SEC filing · Form 8-K | SEC EDGAR | +6.07% | +7.12% | |
| Iridium Announces First Quarter 2026 Results | Press release | PR Newswire | +6.07% | +7.12% | |
| Form ARS Iridium Communications For: Dec 31 | SEC filing · Form ARS | SEC EDGAR | +1.87% | +0.55% | |
| Form DEF 14A Iridium Communications For: May 20 | SEC filing · Form DEF | SEC EDGAR | +1.87% | +0.55% | |
| Form DEFA14A Iridium Communications | SEC filing · Form DEFA14A | SEC EDGAR | +1.87% | +0.55% | |
| Iridium Announces Release Date for First-Quarter 2026 Financial Results | Press release | PR Newswire | +6.05% | +13.00% | |
| Form 8-K Iridium Communications For: Mar 05 | SEC filing · Form 8-K | SEC EDGAR | -0.48% | +0.54% | |
| Form 8-K Iridium Communications For: Feb 26 | SEC filing · Form 8-K | SEC EDGAR | +0.47% | +4.96% | |
| Iridium Launches Next Generation IoT Platform | Press release | PR Newswire | +1.02% | +3.33% | |
| Iridium to Participate in Investor Conferences | Press release | PR Newswire | +0.26% | -0.17% | |
| Form 10-K Iridium Communications For: Dec 31 | SEC filing · Form 10-K | SEC EDGAR | +7.55% | +16.61% | |
| Form 8-K Iridium Communications For: Feb 12 | SEC filing · Form 8-K | SEC EDGAR | +7.55% | +16.61% | |
| Iridium Announces 2025 Results; Issues 2026 Outlook | Press release | PR Newswire | +7.55% | +16.61% | |
| Iridium Announces Release Date for Fourth-Quarter and Full Year 2025 Financial Results | Press release | PR Newswire | +3.81% | +3.76% | |
| On-Air Trials Underway: Iridium NTN Direct Prepares to Enter Beta as Testing Continues | Press release | PR Newswire | +0.74% | +0.87% | |
| HD Hyundai Construction Equipment Chooses Reliable, Global Connectivity with Iridium | Press release | PR Newswire | -0.13% | +0.28% | |
| Form 8-K Iridium Communications For: Dec 04 | SEC filing · Form 8-K | SEC EDGAR | -0.03% | +2.10% | |
| Iridium Appoints Louis Alterman to Board of Directors | Press release | PR Newswire | -0.03% | +2.10% | |
| Iridium Awarded 5-Year System Infrastructure Transformation and Hybridization Contract Worth Up to $85.8 Million | Press release | PR Newswire | -1.03% | +1.09% | |
| Iridium to Participate in Investor Conferences | Press release | PR Newswire | -0.22% | +0.50% |
Each reaction is the move the market actually made, measured from the news timestamp. Headlines link through to the IRDM section they belong to.
Where else IRDM is measured.
IRDM earnings → · Analyst actions → · SEC filings →
Other Communication Services names, measured the same way
| Ticker | Events | Median 30-min | % positive |
|---|---|---|---|
| PARETEUM CORPORATION (TEUM) | 683 | -0.42% | 40% |
| Mobile TeleSystems Public Joint Stock Company American Depositary Shares (Each representing 2 Shares of) (MBT) | 679 | 0.00% | 46% |
| Roku, Inc. - Class A (ROKU) | 641 | +0.19% | 54% |
| InterDigital, Inc. (IDCC) | 636 | -0.03% | 46% |
Same sector, same measurement: percent move vs. the price at the news timestamp, read at 30 minutes. Sample sizes differ, so the medians are comparable but the confidence behind them is not.
All Communication Services names, measured the same way →
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Every name we’ve measured, in one place.
How the numbers are made.
How is Iridium Communications Inc's median reaction calculated?
Every labeled IRDM 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 651 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. 60% of IRDM'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 IRDM'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.