DexCom director receives 5,565-share RSU grant

ALTMAN STEVEN R reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

ALTMAN STEVEN R reported acquisition or exercise transactions in this Form 4 filing.

DexCom director Steven R. Altman received a grant of 5,565 restricted stock units of DexCom common stock. The award was granted on May 28, 2026 and will vest 100% on the earlier of the one-year anniversary of the grant date or DexCom's 2027 Annual Meeting of Stockholders. Each unit represents a contingent right to receive one share of common stock upon settlement. Following the grant, Altman holds 5,565 shares directly from this award and 63,667 shares indirectly through the Altman Family Trust, where he serves as trustee.

Insider Trade Summary

Grant/Award: 5,565 shares

Grant/Award 2 txns

Insider ALTMAN STEVEN R

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	5,565	$0.00	$0.00
holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 5,565 shares (Direct); Common Stock — 63,667 shares (Indirect, by Trust)

Footnotes (2)

1. 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.
2. 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.

Key Figures

RSU grant size: 5,565 shares Grant price per share: $0.0000 per share Direct holdings after grant: 5,565 shares +2 more

5 metrics

RSU grant size 5,565 shares Restricted stock units granted on May 28, 2026

Grant price per share $0.0000 per share Compensation-related equity award, not open-market purchase

Direct holdings after grant 5,565 shares Common stock represented by RSUs following the reported award

Indirect trust holdings 63,667 shares Shares held by the Altman Family Trust where Altman is trustee

Vesting condition Earlier of 1-year from grant or 2027 meeting 100% of RSU award vests on earlier of these two dates

Key Terms

restricted stock unit (RSU), Annual Meeting of Stockholders, contingent right, trustee

4 terms

restricted stock unit (RSU) financial

"Each share is represented by a restricted stock unit (RSU) that represents a contingent right to receive one share"

A restricted stock unit (RSU) is a promise from a company to give an employee company shares (or cash equal to their value) at a future date if certain conditions are met, such as staying with the company or hitting performance targets. For investors, RSUs matter because when they convert into actual shares they increase the number of shares available and can create selling pressure as employees cash out—think of them as a future paycheck paid in company stock.

Annual Meeting of Stockholders financial

"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"

contingent right financial

"RSU that represents a contingent right to receive one share of DexCom, Inc. Common Stock upon settlement"

trustee financial

"Altman Family Trust DTD 8/21/92, with respect to which the Reporting Person is a trustee"

A trustee is a person or institution legally appointed to hold and manage assets or enforce an agreement on behalf of other people (beneficiaries). Think of a trustee as a neutral referee or custodian who must act in the beneficiaries’ best interests, follow the trust or contract rules, and handle distributions, recordkeeping and enforcement. Investors care because a trustworthy trustee protects their rights, ensures promised payments or remedies are delivered, and can influence recoveries if things go wrong.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did DexCom (DXCM) director Steven R. Altman report?

Steven R. Altman reported receiving a grant of 5,565 restricted stock units of DexCom common stock. The Form 4 shows this as a compensation-related award, not an open-market purchase or sale, with shares delivered upon future vesting and settlement.

How do Steven R. Altman’s 5,565 DexCom (DXCM) RSUs vest?

The 5,565 restricted stock units vest 100% on the earlier of the one-year anniversary of the May 28, 2026 grant date or DexCom’s 2027 Annual Meeting of Stockholders. Vesting must occur before shares of common stock are actually delivered.

Does each RSU in Steven R. Altman’s DexCom (DXCM) grant equal one share?

Yes. Each restricted stock unit in the grant represents a contingent right to receive one share of DexCom common stock upon settlement. Shares are only issued after the vesting conditions described in the award are satisfied and the units are settled.

How many DexCom (DXCM) shares does Steven R. Altman hold through a trust?

The filing states that 63,667 DexCom common shares are held by the Steven R. and Lisa J. Altman, TTEE's Altman Family Trust dated August 21, 1992. Steven R. Altman is a trustee of this trust according to the disclosure footnote.

Is Steven R. Altman’s DexCom (DXCM) RSU grant an open-market stock purchase?

No. The Form 4 describes the 5,565-share transaction as a grant or award acquisition with a per-share price of $0.00. This indicates a compensation-related equity award rather than shares bought on the open market for cash.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 06/01/2026 - 05:35 PM EDT Learn about SEC filing dates

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^*

ALTMAN STEVEN R

(Last) (First) (Middle)

6340 SEQUENCE DRIVE

(Street)

SAN DIEGO CALIFORNIA 92121

(City) (State) (Zip)

UNITED STATES

(Country)

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

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/28/2026

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

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

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

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	05/28/2026		A		5,565(1)	A	$0	5,565	D
Common Stock								63,667	I	by Trust(2)

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. 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.

2. 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.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Jereme M. Sylvain, as Attorney-in-Fact for Steven R. Altman	06/01/2026
	** 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.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)