Mark G. Foletta - Aug 15, 2025 Form 4 Insider Report for DEXCOM INC (DXCM)

Role
Director
Signature
/s/ Jereme M. Sylvain, as Attorney-in-Fact for Mark G. Foletta
Stock symbol
DXCM
Transactions as of
Aug 15, 2025
Transactions value $
-$222,903
Form type
4
Date filed
8/18/2025, 05:53 PM
Previous filing
Jul 17, 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
FOLETTA MARK G Director 6340 SEQUENCE DRIVE, SAN DIEGO /s/ Jereme M. Sylvain, as Attorney-in-Fact for Mark G. Foletta 2025-08-18 0001236389

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction DXCM Common Stock Sale -$207K -2.56K -4.74% $81.02 51.3K Aug 15, 2025 by Trust F1, F2
transaction DXCM Common Stock Sale -$15.9K -195 -0.38% $81.54 51.1K Aug 15, 2025 by Trust F3
holding DXCM Common Stock 5.73K Aug 15, 2025 Direct F4
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 On March 13, 2025, The Foletta Family Trust DTD 1/30/2015 (the "Trust") adopted a 10b5-1 Plan. This 10b5-1 Plan allows the orderly disposition of shares owned by the Trust. The shares set forth above were sold pursuant to the 10b5-1 Plan.
F2 This transaction was executed in multiple trades at prices ranging from $80.29 to $81.22. The price above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transactions were effected.
F3 Shares are held by The Foletta Family Trust DTD 1/30/2015, with respect to which the reporting person is a trustee.
F4 Represents unvested restricted stock units which were granted on May 8, 2025 and shall vest on the earlier of the one year anniversary of the grant date or the date of DexCom, Inc.'s 2026 Annual Meeting of Stockholders.