X0306 4 2022-09-06 0001851657 Vaxxinity, Inc. VAXX 0001751631 Prime Movers Lab Fund I LP P.O. BOX 12829 JACKSON WY 83002 0 0 1 0 0001875411 Sloss Dakin C/O PRIME MOVERS LAB FUND I LP P.O. BOX 12829 JACKSON WY 83002 0 0 1 0 Class A Common Stock 2022-09-06 4 S 0 5947 2.4029 D 2226965 I Held by COVAXX PML SPV 1 LP Class A Common Stock 2022-09-06 4 S 0 2234 2.4029 D 836499 I Held by COVAXX PML SPV 2 LP Class A Common Stock 2022-09-06 4 S 0 3934 2.4029 D 1473100 I Held by COVAXX PML SPV 3 LP Class A Common Stock 2022-09-06 4 S 0 25243 2.4029 D 9451674 D Class A Common Stock 3615038 I Held by Prime Movers Growth Fund 1 LP Held by COVAXX PML SPV 1 LP ("PML SPV 1"). Prime Movers Lab GP I LLC ("PML GP I") is the general partner of Prime Movers Lab Fund I LP ("PML") and PML SPV 1. Held by COVAXX PML SPV 2 LP ("PML SPV 2"). Prime Movers Lab GP II LLC ("PML GP II") is the general partner of PML SPV 2. Held by COVAXX PML SPV 3 LP ("PML SPV 3"). PML GP II is the general partner of PML SPV 3. Held by Prime Movers Growth Fund 1 LP ("PMG"). Prime Movers Growth GP I LLC ("PMG GP") is the general partner of PMG. Held by PML. PML GP I is the general partner of PML. Dakin Sloss is the manager of PML GP I, PML GP II and PMG GP, and may be deemed to beneficially own the securities held by PML, PMG, PML SPV 1, PML SPV 2 and PML SPV 3. Mr. Sloss disclaims any beneficial ownership of the securities reported herein for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of its pecuniary interest therein. The price of $2.4029 per share represents a weighted average of purchase prices ranging from $2.40 to $2.42 per share. The reporting person undertakes to provide upon request by the Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Prime Movers Lab Fund I LP /s/ Taylor Frankel, Authorized Person 2022-09-08 Dakin Sloss /s/ Taylor Frankel, Attorney-in-fact 2022-09-08