Exhibit 99.1

FOR RELEASE TUESDAY, OCTOBER 20, 2020

IRIDIUM ANNOUNCES THIRD-QUARTER 2020 RESULTS; IMPROVES 2020 OUTLOOK

MCLEAN, Va. – October 20, 2020 – Iridium Communications Inc. (Nasdaq:IRDM) (“Iridium”) today reported financial results for the third quarter of 2020 and updated its full-year 2020 outlook. Net loss was $4.0 million, or $0.03 per diluted share, for the third quarter of 2020, as compared to net loss of $18.0 million, or $0.14 per diluted share, for the third quarter of 2019. This decrease in net loss was primarily the result of lower net interest expenses related to the refinancing of Iridium’s credit facility and high-yield notes from the year ago period. Also contributing to the improvement was growth in service revenue and lower selling, general and administrative expense. Operational EBITDA (“OEBITDA”)⁽¹⁾ for the third quarter was $93.4 million, as compared to $88.5 million for the prior-year period, representing a year-over-year increase of 6% and an OEBITDA margin⁽¹⁾ of 62%. OEBITDA primarily benefitted from increased commercial revenue and a reduction in operating expenses.

Iridium reported third-quarter total revenue of $151.5 million, which consisted of $116.9 million of service revenue and $34.6 million of revenue related to equipment sales and engineering and support projects. Total revenue increased 5% versus the comparable period of 2019, while service revenue grew by 1%. Service revenue, which represents primarily recurring revenue from Iridium’s growing subscriber base, was 77% of total revenue for the third quarter of 2020.

The Company ended the quarter with 1,429,000 total billable subscribers, which compares to 1,269,000 for the year-ago period and is up by a record 67,000 from 1,362,000 for the quarter ended June 30, 2020. Subscriber growth during the most recent quarter was driven by rising activations of personal communications devices. Total billable subscribers grew 13% year-over-year, driven by growth in commercial IoT customers.

“Iridium’s business model has proven quite resilient given the importance of our services in the face of a global pandemic,” said Matt Desch, CEO, Iridium. Desch continued, “Iridium delivered a record 67,000 net subscriber additions during the quarter, which drove sequential growth in commercial services. Subscriber equipment sales also increased by 18% year-over-year, driven by increased demand in the third quarter.”

Commenting on the full-year outlook, Desch added, “In light of continued momentum, Iridium is raising its full-year guidance for 2020. We now expect to generate approximately $355 million in operational EBITDA and finish the year with net leverage of approximately 4.0 times operational EBITDA. With nearly a full turn of deleveraging in 2020, we are well on our way to achieving our targeted leverage range and undertaking material returns of capital to shareholders.”

Iridium Business Highlights

Service – Commercial

Commercial service remained the largest part of Iridium’s business, representing 61% of the Company’s total revenue during the third quarter. The Company’s commercial customer base is diverse and includes markets such as maritime, aviation, oil and gas, mining, recreation, forestry, construction, transportation and emergency services. These customers rely on Iridium’s products and services as critical to their daily operations and integral to their communications and business infrastructure.

Service – Government

Iridium’s voice and data solutions improve situational awareness for military personnel and track critical assets in tough environments around the globe, providing a unique value proposition that is not easily duplicated.

Under Iridium’s Enhanced Mobile Satellite Services contract (the “EMSS Contract”), a seven-year, $738.5 million fixed-price airtime contract with the U.S. Space Force signed in September 2019, Iridium provides specified satellite airtime services, including unlimited global standard and secure voice, paging, fax, Short Burst Data^®, Iridium Burst^®, RUDICS and Distributed Tactical Communications System services for an unlimited number of Department of Defense and other federal government subscribers. Iridium also provides maintenance and support work for the U.S. government’s dedicated Iridium gateway under two other contracts with the U.S. Space Force. Iridium Certus airtime services are not included under these contracts and may be procured separately for an additional fee.

Equipment

Engineering & Support

Capital expenditures were $10.6 million for the third quarter, which includes $0.9 million of capitalized interest. The Company ended the third quarter with gross debt of $1.64 billion and a cash and cash equivalents balance of $182.7 million, for a net debt balance of $1.46 billion.

2020 Outlook

The Company updated its full-year 2020 outlook for total service revenue, OEBITDA and net leverage. The Company now expects:

In addition to disclosing financial results that are determined in accordance with U.S. GAAP, the Company provides Operational EBITDA and Operational EBITDA margin, which are non-GAAP financial measures, as supplemental measures to help investors evaluate the Company’s fundamental operational performance. Operational EBITDA represents earnings

before interest, income taxes, depreciation and amortization, and share-based compensation expenses. The Company considers the loss on early extinguishment of debt to be financing-related costs associated with interest expense or amortization of financing fees, which by definition are excluded from Operational EBITDA. Such charges are incidental to, but not reflective of, the Company’s day-to-day operating performance. U.S. GAAP requires that certain of the expenses associated with the approximately $3 billion construction cost of Iridium^® NEXT (the “Construction Costs”) be expensed. These Construction Costs, which beginning in 2018 principally consisted of in-orbit insurance, were excluded from Operational EBITDA through the first quarter of 2020. The Company also presents Operational EBITDA expressed as a percentage of GAAP revenue, or Operational EBITDA margin. Operational EBITDA, along with its related measure, Operational EBITDA margin, does not represent, and should not be considered, an alternative to U.S. GAAP measurements such as net income or loss, and the Company’s calculations thereof may not be comparable to similarly titled measures reported by other companies. By eliminating interest, income taxes, depreciation and amortization, and share-based compensation expenses, the Company believes the result is a useful measure across time in evaluating its fundamental core operating performance. Management also uses Operational EBITDA to manage the business, including in preparing its annual operating budget, debt covenant compliance, financial projections and compensation plans. The Company believes that Operational EBITDA is also useful to investors because similar measures are frequently used by securities analysts, investors and other interested parties in their evaluation of companies in similar industries. However, there is no standardized measurement of Operational EBITDA, and Operational EBITDA as the Company presents it may not be comparable with similarly titled non-GAAP financial measures used by other companies. As indicated, Operational EBITDA does not include interest expense on borrowed money, the payment of income taxes, amortization of the Company’s definite-lived intangible assets, or depreciation expense on the Company’s capital assets, which are necessary elements of the Company’s operations. Since Operational EBITDA does not account for these and other expenses, its utility as a measure of the Company’s operating performance has material limitations. Due to these limitations, the Company’s management does not view Operational EBITDA in isolation, but also uses other measurements, such as net income, revenues and operating profit, to measure operating performance. Please refer to the schedule below for a reconciliation of consolidated GAAP net income to Operational EBITDA and Iridium’s Investor Relations webpage at www.iridium.com for a discussion and reconciliation of this and other non-GAAP financial measures. We do not provide a forward-looking reconciliation of expected full-year 2020 Operational EBITDA guidance as the amount and significance of special items required to develop meaningful comparable GAAP financial measures cannot be estimated at this time without unreasonable efforts.

Iridium Communications Inc.

Supplemental Reconciliation of GAAP Net Loss to Operational EBITDA

(In thousands)

Conference Call Information

As previously announced, the Company will host a conference call to discuss its results at 8:30 a.m. Eastern Time on Tuesday, October 20, 2020. Callers should dial 1-412-902-6740 to access the call. The conference call will also be simultaneously webcast on Iridium’s Investor Relations webpage at www.iridium.com. An archive of the webcast will be available following the live conference call.

About Iridium Communications Inc.

Iridium^® is the only mobile voice and data satellite communications network that spans the entire globe. Iridium enables connections between people, organizations and assets to and from anywhere, in real time. Together with its ecosystem of partner companies, Iridium delivers an innovative and rich portfolio of reliable solutions for markets that require truly global communications. In 2019, the company completed a generational upgrade of its satellite network and launched its new specialty broadband service, Iridium Certus. Iridium Communications Inc. is headquartered in McLean, Va., U.S.A., and its common stock trades on the Nasdaq Global Select Market under the ticker symbol IRDM. For more information about Iridium products, services and partner solutions, visit www.iridium.com.

Forward-Looking Statements

Statements in this press release that are not purely historical facts may constitute forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995. Forward-looking statements include statements regarding Iridium’s expectations with respect to total service revenue and OEBITDA growth, cash taxes, and leverage for 2020; cash taxes over the

longer-term; anticipated equipment sales for 2020, and expected revenues from its EMSS Contract with the U.S. government. Forward-looking statements can be identified by the words “anticipates,” “may,” “can,” “believes,” “expects,” “projects,” “intends,” “likely,” “will,” “to be” and other expressions that are predictions or indicate future events, trends or prospects. These forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause Iridium’s actual results, performance or achievements to differ materially from any future results, performance or achievements expressed or implied by such forward-looking statements. These risks and uncertainties include, but are not limited to, uncertainties regarding customer demand for Iridium’s products and services, including demand from the U.S. government; Iridium’s ability to maintain the health, capacity and content of its satellite constellation, and the development of and market for Iridium’s products and services, as well as general industry and economic conditions, and competitive, legal, governmental and technological factors. Other factors that could cause actual results to differ materially from those indicated by the forward-looking statements include those factors listed under the caption “Risk Factors” in the Company’s Form 10-K for the year ended December 31, 2019, filed with the Securities and Exchange Commission (“SEC”) on February 25, 2020, and the Company’s Form 10-Q for the quarter ended September 30, 2020, as filed with the SEC on October 20, 2020, as well as other filings Iridium makes with the SEC from time to time. There is no assurance that Iridium’s expectations will be realized. If one or more of these risks or uncertainties materialize, or if Iridium’s underlying assumptions prove incorrect, actual results may vary materially from those expected, estimated or projected. Iridium’s forward-looking statements are based on information available to it as of the date of this press release and speak only as of the date of this press release, and Iridium undertakes no obligation to update forward-looking statements.

Iridium Communications Inc.    

Condensed Consolidated Statements of Operations    

(In thousands)    

Iridium Communications Inc.    

Condensed Consolidated Statements of Operations    

(In thousands)    

Iridium Communications Inc.    

Summary Revenue and OEBITDA Highlights    

(In thousands)    

Iridium Communications Inc.    

Subscriber Highlights    

(In thousands, except ARPU)