UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

 

SCHEDULE 14A

(Rule 14a-101)

 

INFORMATION REQUIRED IN PROXY STATEMENT

 

SCHEDULE 14A INFORMATION

 

Proxy Statement Pursuant to Section 14(a) of The Securities Exchange Act of 1934

 

(Amendment No. )

 

Filed by the Registrant ☐

 

Filed by a Party other than the Registrant ☒

 

Check the appropriate box:

 

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Preliminary Proxy Statement

 

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Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

 

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Definitive Proxy Statement

 

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Definitive Additional Materials

 

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Soliciting Material Under Rule 14a-12

  

AEROJET ROCKETDYNE HOLDINGS, INC.

(Name of Registrant as Specified in Its Charter)

STEEL PARTNERS HOLDINGS L.P. SPH GROUP HOLDINGS LLC SPH GROUP LLC STEEL PARTNERS HOLDINGS GP INC. WEBFINANCIAL HOLDING CORPORATION STEEL EXCEL, INC. STEEL PARTNERS LTD. WARREN G. LICHTENSTEIN JAMES R. HENDERSON TINA W. JONAS JOANNE M. MAGUIRE AUDREY A. MCNIFF AIMEE J. NELSON MARK A. TUCKER MARTIN TURCHIN VICE ADMIRAL MATHIAS W. WINTER, USN (RET.) HEIDI R. WOOD

(Name of Persons(s) Filing Proxy Statement, if Other Than the Registrant)

 

Payment of Filing Fee (Check all boxes that apply):

 

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No fee required

 

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Fee paid previously with preliminary materials

  

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Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11

 

Warren G. Lichtenstein is disclosing the Plaintiffs’ Post-Trial Brief (the “Brief”), filed with the Court on June 3, 2022 in In re Aerojet Rocketdyne Holdings, Inc., C.A. No. 2022-0127-LWW, as additional soliciting materials. The Brief will also be posted on the website https://saveaerojet.com/. The Brief is attached hereto as Exhibit 99.1 and is incorporated herein by reference.