SCHEDULE 13G/A 0001741560 XXXXXXXX LIVE 8 Common Stock, par value $0.01 per share 12/31/2025 0001819974 SkyWater Technology, Inc 83089J108 2401 East 86th Street Bloomington MN 55425 Rule 13d-1(d) CMI Oxbow Partners, LLC DE 0.00 4487394.00 0.00 4487394.00 4487394.00 N 9.25 OO The percentage reflected in Row 11 was calculated based on 48,508,000 shares of common stock outstanding as of November 10, 2025, as reported by the issuer in its quarterly report on Form 10-Q filed with the U.S. Securities and Exchange Commission on November 12, 2025. Oxbow Industries, LLC MN 0.00 4487397.00 0.00 4487397.00 4487397.00 N 9.25 OO The percentage reflected in Row 11 was calculated based on 48,508,000 shares of common stock outstanding as of November 10, 2025, as reported by the issuer in its quarterly report on Form 10-Q filed with the U.S. Securities and Exchange Commission on November 12, 2025. Loren A. Unterseher X1 5176498.00 4487397.00 5176498.00 4487397.00 9663895.00 N 19.25 IN The percentage reflected in Row 11 was calculated based on 48,508,000 shares of common stock outstanding as of November 10, 2025, as reported by the issuer in its quarterly report on Form 10-Q filed with the U.S. Securities and Exchange Commission on November 12, 2025. The amounts reflected in Rows 5 and 7 exclude 11,428 shares of common stock underlying restricted stock units scheduled to vest on the date immediately preceding the next annual meeting of the issuer's stockholders. SkyWater Technology, Inc 2401 East 86th Street, Bloomington, Minnesota 55425 CMI Oxbow Partners, LLC Oxbow Industries, LLC Loren A. Unterseher c/o Oxbow Industries, LLC 4450 Excelsior Boulevard, Suite 440 Minneapolis, MN 55416 CMI Oxbow Partners, LLC - Delaware limited liability company Oxbow Industries, LLC - Minnesota limited liability company Loren A. Unterseher - Citizen of the United States of America 9,663,895 shares Loren A. Unterseher is President of CMI Oxbow Partners, LLC ("CMI") and Managing Partner of Oxbow Industries, LLC ("Oxbow"), which is the majority member of CMI. As a result, Mr. Unterseher and Oxbow may be deemed to be the beneficial owners of, and to have a pecuniary interest in, shares of common stock held by CMI. Each disclaims beneficial ownership of such shares, except to the extent of any pecuniary interest therein. 19.92 5,176,498 4,487,397 5,176,498 4,487,397 Y Y Y Y Y Y JOINT FILING AGREEMENT CMI Oxbow Partners, LLC /s/ Loren A. Unterseher 02/13/2026 Oxbow Industries, LLC /s/ Loren A. Unterseher 02/13/2026 Loren A. Unterseher /s/ Loren A. Unterseher 02/13/2026