X0609 4 2026-09-15 0 0001445305 WORKIVA INC WK 0001014008 VANDERPLOEG MARTIN J. false 2900 UNIVERSITY BOULEVARD AMES IA 50010 1 0 0 0 0 Class A Common Stock 292275 D Class A Common Stock 437105 I By living trust Class B Common Stock 2026-09-15 4 G 0 60000 0 D Class A Common Stock 60000 1141832 I By living trust Class B Common Stock 2026-09-15 4 G 0 60000 0 A Class A Common Stock 60000 60000 I By family trust Employee Stock Option to Purchase Class A Common Stock 12.40 2018-02-01 2027-01-31 Class A Common Stock 200204 200204 D Each share of Class B Common Stock is convertible, at any time at the election of the holder, into one share of Class A Common Stock. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon (i) the date specified by the holders of at least 66 2/3% of the outstanding shares of Class B Common Stock, (ii) any transfer, except for certain "qualified transfers" (as defined in the Issuer's Certificate of Incorporation) or (iii) upon the death of a natural person holding shares of Class B Common Stock (subject to certain exceptions as defined in the Issuer's Certificate of Incorporation). On September 15, 2026, the reporting person contributed 60,000 shares of indirectly owned Class B Common Stock to an irrevocable trust for which the Reporting Person serves as an investment advisor, and of which the Reporting Person's immediate family member is beneficiary. Grant of stock option pursuant to the Workiva Inc. 2014 Equity Incentive Plan. Vests in three equal annual installments commencing on the first anniversary of the grant date. /s/ Brandon E. Ziegler as attorney-in-fact for Martin J. Vanderploeg 2026-09-16