DEXCOM INC (DXCM) · Insider Trading (Form 4) SEC Filing

=== SEC Form 4 — Statement of Changes in Beneficial Ownership === Document Type: 4 Period of Report: 2026-05-28 10b5-1 Pre-arranged Plan: No --- Issuer --- Name: DEXCOM INC (DXCM) CIK: 0001093557 --- Reporting Owner --- Name: ALTMAN STEVEN R CIK: 0001191307 Role: Director --- Non-Derivative Transactions --- [Transaction #1] Security: Common Stock Date: 2026-05-28 | Code: A (Grant or award) Shares: +5,565 | Price: $0.00 Shares Owned After: 5,565 | Ownership: D (Direct) Footnotes: [F1] The RSU Award was granted on May 28, 2026 and 100% of the RSU Award will vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2027 Annual Meeting of Stockholders. Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement. --- Holdings --- [Holding #1] Security: Common Stock Ownership: I (Indirect) Footnotes: [F2] Shares are held by the Steven R. and Lisa J. Altman, TTEE's Altman Family Trust DTD 8/21/92, with respect to which the Reporting Person is a trustee. --- Footnotes (Complete Index) --- F1: The RSU Award was granted on May 28, 2026 and 100% of the RSU Award will vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2027 Annual Meeting of Stockholders. Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement. F2: Shares are held by the Steven R. and Lisa J. Altman, TTEE's Altman Family Trust DTD 8/21/92, with respect to which the Reporting Person is a trustee. --- Signature --- /s/ /s/ Jereme M. Sylvain, as Attorney-in-Fact for Steven R. Altman (2026-06-01)