ADENTRA Inc. — Proxy Solicitation & Information Statement 2020

Apr 2, 2020

UNITED STATES SECURITIES AND EXCH ANG E CO M M ISSIO N W ashington, D.C. 20549

SCH EDULE 14A

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SPX Corporation

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13320-A Ballantyne Corporate Place Charlotte, NC 28277 Telephone: (980) 474-3700 Facsim ile: (980) 474-3729

April 2, 2020

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ADDENDUM TO PRO XY STATEM ENT

Following the printing of our 2020 Notice of Annual M eeting of Stockholders and Proxy Statem ent, we determ ined that num bers appearing in the second and fourth colum ns of the Equity Com pensation Plan Inform ation table appearing on page 42 were inadvertently transposed. The corrected table is as follows and replaces and supersedes the table appearing on page 42 of our 2020 Notice of Annual M eeting of Stockholders and Proxy Statem ent.

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----- Start of picture text ----- Num ber ofSecuritiesNum ber of Rem aining AvailableSecurities to Be for Future IssuanceIssued Upon W eighted-Average Under EquityExercise of Exercise Com pensation PlansO utstanding O ptions, Price of O utstanding (Excluding SecuritiesW arrants, and O ptions, W arrants, Reflected inPlan Category Rights (a) [(1)] and Rights (b) [(2)] Colum n (a)) [(3)]Equity Com pensation PlansApproved By Stockholders 2,296,954 19.05 4,943,874Total 2,296,954 19.05 4,943,874----- End of picture text -----

(1) Com prised of 1,691,343 shares issuable upon the exercise of outstanding Options and 605,611 shares issuable pursuant to RSUs and PSUs.

(2) Excludes RSUs and PSUs.

(3) All these shares were available for issuance under the 2019 Stock Com pensation Plan.