DexCom insider purchase lifts direct holdings to 331,697 shares

Rhea-AI Filing Summary

DexCom (DXCM) reported insider purchases by its President & COO, Jacob Steven Leach. On 11/10/2025, he bought 15,700 shares at a weighted average price of $54.977 and 2,500 shares at a weighted average price of $55.4252, executed in multiple trades within disclosed price ranges.

Following these transactions, he directly beneficially owned 331,697 shares. That total includes 84,537 unvested restricted stock units scheduled to vest through March 2026–2028 as previously granted. In addition, 47,296 shares are indirectly held through the Gregg Family Grandchildren's Trust, for which his spouse serves as a trustee.

Insights

Equity ownership & insider activity analyst

Insider purchased 18,200 shares; ownership now 331,697 direct.

Two open-market purchases on 11/10/2025 are disclosed: 15,700 shares at a weighted average of $54.977 and 2,500 shares at a weighted average of $55.4252. Prices reflect multiple trades within stated ranges.

Post-transaction direct holdings are 331,697 shares, which include 84,537 unvested RSUs with vesting dates extending through March 2026–March 2028. There are also 47,296 shares held indirectly via a family trust. Actual market impact depends on future transactions and vesting, if and when they occur.

Insider Trade Summary

Net Buyer: 18,200 shares ($1,001,702)

Net Buy 3 txns

Insider Leach Jacob Steven

Role President & COO

Bought 18,200 shs ($1.00M)

Type	Security	Shares	Price	Value
Purchase	Common Stock	15,700	$54.977	$863K
Purchase	Common Stock	2,500	$55.4252	$139K
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 329,197 shares (Direct); Common Stock — 47,296 shares (Indirect, Family Holdings)

Footnotes (1)

1. This transaction was executed in multiple trades at prices ranging from $54.34 to $55.33. The price above reflects the weighted average purchase 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. This transaction was executed in multiple trades at prices ranging from $55.34 to $55.55. The price above reflects the weighted average purchase 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. Included in this number are 84,537 unvested restricted stock units, 35,906 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 22,798 of which were granted on March 8, 2025 and shall vest through March 8, 2027, 17,368 of which were granted on March 8, 2024 and shall vest through March 8, 2027, and 8,465 of which were granted on March 8, 2023 and shall vest through March 8, 2026. Shares are held by the Gregg Family Grandchildren's Trust UAD 12/30/2010, with respect to which the reporting person's spouse is a trustee.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a 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). See Instruction 10.

1. Name and Address of Reporting Person^*

Leach Jacob Steven

(Last) (First) (Middle)

6340 SEQUENCE DRIVE

(Street)

SAN DIEGO CA 92121

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
DEXCOM INC [ DXCM ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	President & COO

3. Date of Earliest Transaction (Month/Day/Year)
11/10/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	11/10/2025		P		15,700	A	$54.977(1)	329,197	D
Common Stock	11/10/2025		P		2,500	A	$55.4252(2)	331,697(3)	D
Common Stock								47,296	I	Family Holdings(4)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. This transaction was executed in multiple trades at prices ranging from $54.34 to $55.33. The price above reflects the weighted average purchase 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.

2. This transaction was executed in multiple trades at prices ranging from $55.34 to $55.55. The price above reflects the weighted average purchase 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.

3. Included in this number are 84,537 unvested restricted stock units, 35,906 of which were granted on March 8, 2025 and shall vest through March 8, 2028, 22,798 of which were granted on March 8, 2025 and shall vest through March 8, 2027, 17,368 of which were granted on March 8, 2024 and shall vest through March 8, 2027, and 8,465 of which were granted on March 8, 2023 and shall vest through March 8, 2026.

4. Shares are held by the Gregg Family Grandchildren's Trust UAD 12/30/2010, with respect to which the reporting person's spouse is a trustee.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Jereme M. Sylvain, as Attorney-in-Fact for Jacob Steven Leach	11/10/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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