Aerojet Rocketdyne Executive Chairman Warren Lichtenstein Calls for Disclosure of Result of Committee’s Investigation into His Actions

Believes Shareholders Deserve to Know the Result to Make Informed Decisions

Reaffirms Desire to Hold 2022 Annual Meeting on June 27^th, Provided Trial Regarding Eileen Drake’s Misuse of Corporate Resources is Completed in Late May, as Expected

Aerojet Rocketdyne Holdings, Inc. (NYSE: AJRD) (“Aerojet Rocketdyne” or the “Company”) Executive Chairman Warren Lichtenstein, who, collectively with his affiliates and the participants in his solicitation, owns approximately 5.2% of the Company's outstanding shares, today called on the Company’s Board of Directors (the "Board") to authorize the public release of the memorandum delivered to him and Eileen Drake summarizing the findings and conclusions of the Non-Management Committee of the Board on the months-long investigation into Mr. Lichtenstein’s actions.

Mr. Lichtenstein issued the following statement:

“Shareholders deserve to know what the Committee has reported to me and Eileen Drake about the investigation that Ms. Drake has squandered so much of their money on – and on which she has pinned so much hope of discrediting me. Counsel for Ms. Drake indicated in a Delaware Court hearing on May 3, 2022 that the investigation has concluded – thereby publicizing this fact. Given this state of affairs, we believe that shareholders are entitled to learn what Ms. Drake and I have been told about the investigation, instead of being left in the dark.

We have therefore sent a letter to Company counsel requesting that the Board authorize the public release of the culmination of the Committee’s work. Because the investigation is complete and the process has played out, and because counsel for Ms. Drake has publicly mischaracterized the investigation, there is no longer any justifiable basis to keep the result a secret.

We believe shareholders should have the result available to them so they can make a fully informed decision about the future of the Company. That is why we are also reiterating our desire to hold the Aerojet Annual Meeting on June 27^th – at which point we expect shareholders to have been able to absorb critical information from the trial of Ms. Drake for alleged misuse of corporate resources.

We are disappointed that Ms. Drake continues to use Aerojet Rocketdyne as her personal piggy bank in a desperate bid to maintain power. Her efforts to call a Special Meeting are part and parcel of this strategy – forcing shareholders to potentially foot the bill for multiple solicitations. We believe it is egregious that Ms. Drake attempted to get access to up to $10 million of Company resources to wage this proxy fight. In an attempt to put a stop to this waste of shareholders’ money, we stand ready to pledge not to seek reimbursement for any of our proxy fight costs if Ms. Drake agrees to do the same.

We look forward to continuing to protect shareholders in the weeks ahead and ensuring they are fully apprised of all relevant facts before voting at the Annual Meeting.”

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Certain Information Concerning the Participants

Warren Lichtenstein and SPH Group Holdings LLC, a Delaware limited liability company (“SPHG Holdings”), who together with the other participants named herein (collectively, the “Steel Partners Group”), intend to file a preliminary proxy statement and accompanying WHITE proxy card with the Securities and Exchange Commission (“SEC”) to be used to solicit votes for the election of its slate of highly qualified director nominees at the 2022 annual meeting of stockholders of Aerojet Rocketdyne Holdings, Inc., a Delaware corporation (the “Company”). This communication is being sent in the individual capacities of the members of the Steel Partners Group, and not by or on behalf of the Company. No Company resources were used in connection with these materials.

THE STEEL PARTNERS GROUP STRONGLY ADVISES ALL STOCKHOLDERS OF THE COMPANY TO READ THE PROXY STATEMENT AND OTHER PROXY MATERIALS AS THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION. SUCH PROXY MATERIALS WILL BE AVAILABLE AT NO CHARGE ON THE SEC'S WEB SITE AT HTTP://WWW.SEC.GOV. IN ADDITION, THE PARTICIPANTS IN THIS PROXY SOLICITATION WILL PROVIDE COPIES OF THE PROXY STATEMENT WITHOUT CHARGE, WHEN AVAILABLE, UPON REQUEST.

The participants in the proxy solicitation are anticipated to be SPHG Holdings, Steel Partners Holdings L.P., a Delaware limited partnership (“Steel Holdings”), SPH Group LLC, a Delaware limited liability company (“SPHG”), Steel Partners Holdings GP Inc., a Delaware corporation (“Steel Holdings GP”), WebFinancial Holding Corporation, a Delaware corporation (“WebFinancial”), Steel Excel, Inc., a Delaware corporation (“Steel Excel”), Steel Partners, Ltd., a Delaware corporation (“SPL”), Warren G. Lichtenstein, James R. Henderson, Joanne M. Maguire, Audrey A. McNiff, Aimee J. Nelson, Martin Turchin and Heidi R. Wood.

As of the date hereof, SPHG Holdings directly owned 1,497 shares of Common Stock, $0.10 par value, of the Company (the “Shares”), WebFinancial directly owned 3,482,572 Shares and Steel Excel directly owned 465,427 Shares. Steel Holdings owns 99% of the membership interests of SPHG. SPHG is the sole member of SPHG Holdings. Steel Holdings GP is the general partner of Steel Holdings, the managing member of SPHG and the manager of SPHG Holdings. Accordingly, each of Steel Holdings and Steel Holdings GP may be deemed to beneficially own the Shares directly owned by SPHG Holdings. SPHG owns 100% of the outstanding shares of common stock of WebFinancial. Accordingly, Steel Holdings, SPHG and Steel Holdings GP may be deemed to beneficially own the Shares directly owned by WebFinancial. SPHG Holdings owns 100% of the outstanding shares of common stock of Steel Excel. Accordingly, each of Steel Holdings, SPHG, SPHG Holdings and Steel Holdings GP may be deemed to beneficially own the Shares directly owned by Steel Excel. As of the date hereof, SPL directly owned 60,546 Shares. Mr. Lichtenstein is the Chief Executive Officer of SPL. Accordingly, Mr. Lichtenstein may be deemed to beneficially own the Shares directly owned by SPL. As of the date hereof, Warren G. Lichtenstein directly owned 207,953 Shares. An additional 526,695 Shares are held by a “rabbi trust,” the receipt of which has been deferred by Mr. Lichtenstein pursuant to the Company’s Deferred Compensation Plan for Nonemployee Directors. Such 526,695 Shares are not deemed to be beneficially owned by Mr. Lichtenstein. As of the date hereof, James R. Henderson directly owned 48,107 Shares. An additional 83,986 Shares are held by a “rabbi trust,” the receipt of which has been deferred by Mr. Henderson pursuant to the Company’s Deferred Compensation Plan for Nonemployee Directors. Such 83,986 Shares are not deemed to be beneficially owned by Mr. Henderson. As of the date hereof, Audrey A. McNiff directly owned 4,787 Shares. An additional 3,988 Shares are held by a “rabbi trust,” the receipt of which has been deferred by Ms. McNiff pursuant to the Company’s Deferred Compensation Plan for Nonemployee Directors. Such 3,988 Shares are not deemed to be beneficially owned by Ms. McNiff. As of the date hereof, Martin Turchin directly owned 108,066 Shares. Additionally, Mr. Turchin beneficially owned indirectly an aggregate of 12,500 Shares held in several trusts of which he is a trustee. An additional 5,886 Shares are held by a “rabbi trust,” the receipt of which has been deferred by Mr. Turchin pursuant to the Company’s Deferred Compensation Plan for Nonemployee Directors. Such 5,886 Shares are not deemed to be beneficially owned by Mr. Turchin. As of the date hereof, Joanne M. Maguire, Aimee J. Nelson and Heidi R. Wood did not beneficially own any securities of the Company.

Forward-Looking Statements

This press release contains certain "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, that reflect Steel Partners Holdings L.P.’s (“SPLP”) current expectations and projections about its future results, performance, prospects and opportunities. SPLP identifies these forward-looking statements by using words such as "may," "should," "expect," "hope," "anticipate," "believe," "intend," "plan," "estimate," "will" and similar expressions. These forward-looking statements are based on information currently available to SPLP and are subject to risks, uncertainties and other factors that could cause its actual results, performance, prospects or opportunities to differ materially from those expressed in, or implied by, these forward-looking statements. These factors include, without limitation, the adverse effects of the COVID-19 pandemic to SPLP’s business, results of operations, financial condition and cash flows; material weaknesses in SPLP’s internal control over financial reporting; fluctuations in crude oil and other commodity prices; substantial cash funding requirements that may be required in the future as a result of certain of SPLP’s subsidiaries’ sponsorship of defined benefit pension plans; significant costs, including remediation costs, as a result of complying with environmental laws or failing to comply with other extensive regulations, including banking regulations; the impact of climate change legislation or regulations restricting emissions of greenhouse gases on costs and demand for SPLP’s services; impacts to SPLP’s liquidity or financial condition as a result of legislative and regulatory actions; SPLP’s ability to maintain sufficient cash flows from operations or through financings to meet its obligations under its senior credit facility; risks associated with SPLP’s business strategy of acquisitions; losses sustained in SPLP’s investment portfolio; the impact of interest rates on SPLP’s investments, such as increased interest rates or the use of a SOFR based interest rate in SPLP’s credit facilities; reliance on the intellectual property owned by others and SPLP’s ability to protect its own intellectual property and licenses; risks associated with conducting operations outside of the United States, including changes in trade policies and the costs or limitations of acquiring materials and products used in SPLP’s operations; risks of litigation; impacts to SPLP’s WebBank business as a result of the highly regulated environment in which it operates, as well as the risk of litigation regarding the processing of PPP loans and the risk that the SBA may not fund some or all PPP loan guaranties; potentially disruptive impacts from economic downturns in various sectors; loss of customers by SPLP’s subsidiaries as a result of not maintaining long-term contracts with customers; risks related to SPLP’s key members of management and the senior leadership team; SPLP’s agreement to indemnify its manager pursuant to its management agreement, which may incentivize the manager to take unnecessary risks; risks related to SPLP’s common and preferred units, including potential price reductions for current unitholders if additional common or preferred units are issued, as well as the lack of an active market for SPLP’s units as a result of transfer restrictions contained in SPLP’s partnership agreement; the ability of SPLP’s subsidiaries to fully use their tax benefits; impacts as a result of changes in tax rates, laws or regulations, including U.S. government tax reform; labor disruptions as a result of vaccine mandated by the United States federal government. These statements involve significant risks and uncertainties, and no assurance can be given that the actual results will be consistent with these forward-looking statements. Investors should read carefully the factors described in the "Risk Factors" section of SPLP's filings with the SEC, including SPLP's Form 10-K for the year ended December 31, 2021, for information regarding risk factors that could affect SPLP's results. Any forward-looking statement made in this press release speaks only as of the date hereof. Except as otherwise required by law, SPLP undertakes no obligation to publicly update or revise any forward-looking statements, whether as a result of new information, future events, changed circumstances, or any other reason.

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