X0306 4 2021-04-21 0 0001819974 SkyWater Technology, Inc SKYT 0001741560 Unterseher Loren A 2401 EAST 86TH STREET BLOOMINGTON MN 55425 1 0 1 0 Common Stock 2021-04-21 4 A 0 7143 0.00 A 7143 D Common Stock 27995400 I See note Represents a grant of restricted stock units ("RSUs"). The RSUs vest on the date immediately preceding the next occurring annual meeting of the Issuer's stockholders, contingent on the reporting person's continued service on such vesting date. The reporting person serves as a director of the Issuer, and is also President of CMI Oxbow Partners, LLC ("CMI") and Managing Partner of Oxbow Industries, LLC ("Oxbow"), which is the majority member of CMI. CMI directly holds the 27,995,400 shares of Common Stock reported in Column 5. As a result, the reporting person may be deemed to be the beneficial owner of, and to have a pecuniary interest in, such shares of Common Stock. The reporting person disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. /s/ Jason Stokes, Attorney-in-Fact 2021-04-22