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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-K

(Mark One)

For the fiscal year ended December 31, 2021

OR

Commission File Number 1-3863

L3HARRIS TECHNOLOGIES, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (321) 727-9100

Securities Registered Pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. Yes þ No ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes ¨ No þ

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ No ¨

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes þ No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report. ☑

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes ☐ No þ

The aggregate market value of the voting common equity held by non-affiliates of the registrant at July 2, 2021 was $44,061,543,832 (based on the quoted closing sale price per share of the stock on the New York Stock Exchange). For purposes of this calculation, the registrant has assumed that its directors and executive officers as of July 2, 2021 are affiliates.

The number of shares outstanding of the registrant’s common stock as of February 18, 2022 was 193,065,899.

Documents Incorporated by Reference:

Portions of the registrant’s definitive Proxy Statement for the 2022 Annual Meeting of Shareholders scheduled to be held on April 22, 2022, which will be filed with the Securities and Exchange Commission within 120 days after the end of the registrant’s fiscal year ended December 31, 2021, are incorporated by reference into Part III of this Annual Report on Form 10-K to the extent described therein.

L3HARRIS TECHNOLOGIES, INC.

ANNUAL REPORT ON FORM 10-K FOR THE FISCAL YEAR ENDED DECEMBER 31, 2021

TABLE OF CONTENTS

Exhibits

This Annual Report on Form 10-K contains trademarks, service marks and registered marks of L3Harris Technologies, Inc. and its subsidiaries. All other trademarks are the property of their respective owners.

Cautionary Statement Regarding Forward-Looking Statements

This Annual Report on Form 10-K (this “Report”), including “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations,” contains forward-looking statements that involve risks and uncertainties, as well as assumptions that may not materialize or prove correct, which could cause our results to differ materially from those expressed in or implied by such forward-looking statements. All statements other than statements of historical fact are statements that could be deemed forward-looking statements, including, but not limited to, statements concerning: our plans, strategies and objectives for future operations; new products, systems, technologies, services or developments; future economic conditions, performance or outlook; future political conditions; the outcome of contingencies or litigation; environmental remediation cost estimates; the potential level of share repurchases, dividends or pension contributions; potential acquisitions or divestitures; the integration of our acquisitions; the value of contract awards and programs; expected revenue; expected cash flows or capital expenditures; our beliefs or expectations; activities, events or developments that we intend, expect, project, believe or anticipate will or may occur in the future; and assumptions underlying any of the foregoing. Forward-looking statements may be identified by their use of forward-looking terminology, such as “believes,” “expects,” “may,” “could,” “should,” “would,” “will,” “intends,” “plans,” “estimates,” “anticipates,” “projects” and similar words or expressions. You should not place undue reliance on these forward-looking statements, which reflect our management’s opinions only as of the date of filing of this Report and are not guarantees of future performance or actual results. Factors that might cause our results to differ materially from those expressed in or implied by these forward-looking statements, from our current expectations or projections or from our historical results include, but are not limited to, those discussed in “Item 1A. Risk Factors” of this Report. All forward-looking statements are qualified by, and should be read in conjunction with, those risk factors. Forward-looking statements are made in reliance on the safe harbor provisions of Section 27A of the Securities Act of 1933, as amended (the “Securities Act”), and Section 21E of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and are made as of the date of filing of this Report, and we disclaim any intention or obligation, other than imposed by law, to update or revise any forward-looking statements, whether as a result of new information, future events or developments or otherwise, after the date of filing of this Report or, in the case of any document incorporated by reference, the date of that document.

Amounts contained in this Report may not always add to totals due to rounding.

L3Harris Merger

As described in more detail in Note 1: Significant Accounting Policies under “Principles of Consolidation” and Note 4: Business Combination in the Notes to Consolidated Financial Statements in this Report (the “Notes”), on October 12, 2018, Harris Corporation (“Harris”) entered into an Agreement and Plan of Merger (the “Merger Agreement”) with L3 Technologies, Inc. (“L3”) and Leopard Merger Sub Inc., a newly formed, direct wholly-owned subsidiary of Harris (“Merger Sub”), pursuant to which Harris and L3 agreed to combine their respective businesses in an all-stock merger, at the closing of which Merger Sub would merge with and into L3, with L3 continuing as the surviving corporation and a direct wholly-owned subsidiary of Harris (the “L3Harris Merger”), and Harris’ name would change to “L3Harris Technologies, Inc.” The closing of the L3Harris Merger occurred on June 29, 2019, after the end of Harris’ fiscal 2019 on June 28, 2019.

PART I