Comparable stake leader
BlackRock, Inc.
SEC ownership of DEXCOM INC
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001093557.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
03 Jun 2026
- Public ticker
- DXCM on Nasdaq
- Parsed ownership sources
- 13F, 13D/G, and 3/4/5
- Largest SEC-reported holder
- BlackRock, Inc.
- Latest 13D/G holder
- BlackRock, Inc.
- Latest parsed ownership date
- 03 Jun 2026
- Issuer CIK
- 0001093557
- Issuer location
- San Diego, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of DEXCOM INC (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
03 Jun 2026
13F
13D/G
3/4/5
Lead comparable stake: 8.3%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 8.3%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
8.3%
VANGUARD CAPITAL MANAGEMENT LLC
7.5%
VANGUARD PORTFOLIO MANAGEMENT LLC
5%
Jacob Steven Leach
0.12%
Kevin R. Sayer
0.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
8.3%
from 13D/G
|
$2,446,962,501
38,964,371 shares
|
— | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
7.5%
|
$1,811,668,090
28,848,218 shares
|
$0 | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5%
|
$1,213,457,145
19,322,566 shares
|
$0 | 31 Mar 2026 |
| Jacob Steven Leach |
3/4/5
President, CEO, and Director, Director
|
0.12%
|
$29,368,733
467,655 shares
|
+$1,001,702 | 22 May 2026 |
| Kevin R. Sayer |
3/4/5
Executive Chair, Director
|
0.1%
|
$27,538,704
382,482 shares
|
-$1,926,648 | 21 May 2026 |
| Eric Topol |
3/4/5
Director
|
0.1%
|
$25,169,246
380,545 shares
|
— | 08 May 2025 |
| Jereme M. Sylvain |
3/4/5
EVP, Chief Financal Officer
|
0.04%
|
$9,535,614
151,841 shares
|
-$357,796 | 22 May 2026 |
| Sadie Stern |
3/4/5
EVP Chief People & Culture Off
|
0.03%
|
$8,167,705
130,059 shares
|
-$372,437 | 22 May 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$4,656,925.
Buys
$1,001,702
Insiders: 1
Sells
$5,658,627
Insiders: 10
Net
-$4,656,925
Shares: -59,301
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 18,200
Shares: 77,501
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 42,694 | $0 | $3,029,267 | -$3,029,267 |
| 3-6 | 0 | 1,012 | $0 | $68,826 | -$68,826 |
| 6-9 | 18,200 | 7,866 | $1,001,702 | $448,177 | +$553,525 |
| 9-12 | 0 | 25,929 | $0 | $2,112,357 | -$2,112,357 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 33 reporting-owner rows connected to DEXCOM INC. Open a relationship link for the CIK-to-CIK filing trail.
Rows
33
Largest Forms 3/4/5 holder
Jacob Steven Leach
Net 12M change
-$4,443,060
Latest report
03 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Jacob Steven Leach | President, CEO, and Director, Director | $29,368,733 | +$1,001,702 | +3.5% | Median | 22 May 2026 |
| Kevin R. Sayer | Executive Chair, Director | $27,538,704 | -$1,926,648 | -6.5% | Filing P/S | 21 May 2026 |
| Donald Abbey | EVP Global Business Services I | $25,718,882 | Mixed | 10 Mar 2023 | ||
| Eric Topol | Director | $25,169,246 | Mixed | 08 May 2025 | ||
| Steven R. Pacelli | EVP Managing Director Dexcom V | $15,426,532 | Mixed | 24 Nov 2023 | ||
| Jay S. Skyler | Director | $12,777,409 | Mixed | 18 May 2023 | ||
| Andrew K. Balo | EVP Regulatory Strategy Clinic | $10,029,255 | Mixed | 10 Mar 2023 | ||
| Jereme M. Sylvain | EVP, Chief Financal Officer | $9,535,614 | -$357,796 | -3.6% | Median | 22 May 2026 |
| Teri L. Lawver | EVP Chief Commercial Officer | $8,957,263 | Filing P/S | 12 Mar 2024 | ||
| Sadie Stern | EVP Chief People & Culture Off | $8,167,705 | -$372,437 | -4.4% | Median | 22 May 2026 |
| Barry J. Regan | EVP Operations | $7,228,803 | Mixed | 18 Dec 2023 | ||
| Jon Coleman | EVP, Chief Commercial Officer | $7,075,708 | -$722,628 | -9.3% | Filing P/S | 03 Jun 2026 |
| Michael Jon Brown | EVP Chief Legal Compliance Off | $6,785,728 | -$443,820 | -6.1% | Median | 22 May 2026 |
| Paul R. Flynn | EVP Global Revenue | $6,051,800 | Mixed | 18 Dec 2023 | ||
| Shelly R. Selvaraj | SVP Chief Information Officer | $5,990,477 | Mixed | 11 Sep 2023 | ||
| Girish Naganathan | EVP Chief Technology Officer | $5,900,471 | Mixed | 09 Nov 2023 | ||
| Steven R. Altman | Director | $4,347,769 | Median | 28 May 2026 | ||
| Mark G. Foletta | Director | $3,967,891 | -$685,724 | -15% | Median | 28 May 2026 |
| Matthew Vincent Dolan | EVP, Strategy & Corporate Dev | $3,654,229 | Filing P/S | 28 Jan 2025 | ||
| Richard Alexander Collins | Director | $2,874,167 | -$389,410 | -12% | Median | 28 May 2026 |
Recent insider transactions for DEXCOM INC
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Jon Coleman | DXCM | Common Stock | Sale | -4.89% | $364,052 | $74.13 | -4,911 | 95,450 | 04 Jun 2026 | Direct |
| Jon Coleman | DXCM | Common Stock | Sale | -4.67% | $358,576 | $73.00 | -4,912 | 100,361 | 03 Jun 2026 | Direct |
| Steven R. Altman | DXCM | Common Stock | Award | 5,565 | 5,565 | 28 May 2026 | Direct | |||
| Kyle Malady | DXCM | Common Stock | Award | 24.6% | 5,575 | 28,242 | 28 May 2026 | Direct | ||
| Nicholas Augustinos | DXCM | Common Stock | Award | 5,575 | 5,575 | 28 May 2026 | Direct | |||
| Bridgette P. Heller | DXCM | Common Stock | Award | 22.3% | 5,575 | 30,582 | 28 May 2026 | Direct | ||
| Mark G. Foletta | DXCM | Common Stock | Award | 6,331 | 6,331 | 28 May 2026 | Direct | |||
| Albert Frederick Osterloh IV | DXCM | Common Stock | Award | 23.1% | 1,630 | 8,691 | 28 May 2026 | Direct | ||
| Rimma Driscoll | DXCM | Common Stock | Award | 47.8% | 5,605 | 17,319 | 28 May 2026 | Direct | ||
| Renee D. Gala | DXCM | Common Stock | Award | 81.5% | 5,605 | 12,486 | 28 May 2026 | Direct | ||
| Dr. Euan Ashley | DXCM | Common Stock | Award | 77.7% | 5,565 | 12,731 | 28 May 2026 | Direct | ||
| Richard Alexander Collins | DXCM | Common Stock | Award | 5,605 | 5,605 | 28 May 2026 | Direct | |||
| Jacob Steven Leach | DXCM | Common Stock | Tax liability | -0.34% | -1,451 | 420,359 | 22 May 2026 | Direct | ||
| Michael Jon Brown | DXCM | Common Stock | Tax liability | -1.33% | -1,451 | 108,053 | 22 May 2026 | Direct | ||
| Jereme M. Sylvain | DXCM | Common Stock | Tax liability | -0.95% | -1,451 | 151,841 | 22 May 2026 | Direct | ||
| Sadie Stern | DXCM | Common Stock | Tax liability | -1.1% | -1,451 | 130,059 | 22 May 2026 | Direct | ||
| Jon Coleman | DXCM | Common Stock | Tax liability | -6.54% | -7,362 | 105,273 | 22 May 2026 | Direct | ||
| Kevin R. Sayer | DXCM | Common Stock | Sale | -6.54% | $1,926,648 | $72.00 | -26,759 | 382,482 | 21 May 2026 | Direct |
| Michael Jon Brown | DXCM | Common Stock | Sale | -1.53% | $101,847 | $59.91 | -1,700 | 109,504 | 15 May 2026 | Direct |
| Bridgette P. Heller | DXCM | Common Stock | Sale | -3.89% | $60,730 | $60.01 | -1,012 | 25,007 | 12 May 2026 | Direct |
| Nicholas Augustinos | DXCM | Common Stock | Gift | 15.1% | 5,046 | 38,457 | 08 May 2026 | by Trust | ||
| Nicholas Augustinos | DXCM | Common Stock | Gift | -100% | -5,046 | 0 | 08 May 2026 | Direct | ||
| Richard Alexander Collins | DXCM | Common Stock | Gift | 14.5% | 5,074 | 40,162 | 08 May 2026 | by Trust | ||
| Richard Alexander Collins | DXCM | Common Stock | Gift | -100% | -5,074 | 0 | 08 May 2026 | Direct | ||
| Mark G. Foletta | DXCM | Common Stock | Gift | 11.2% | 5,731 | 56,852 | 08 May 2026 | by Trust | ||
| Mark G. Foletta | DXCM | Common Stock | Gift | -100% | -5,731 | 0 | 08 May 2026 | Direct | ||
| Steven R. Altman | DXCM | Common Stock | Gift | 8.59% | 5,037 | 63,667 | 08 May 2026 | by Trust | ||
| Steven R. Altman | DXCM | Common Stock | Gift | -100% | -5,037 | 0 | 08 May 2026 | Direct | ||
| Michael Jon Brown | DXCM | Common Stock | Sale | -1.51% | $107,168 | $63.04 | -1,700 | 111,204 | 15 Apr 2026 | Direct |
| Michael Jon Brown | DXCM | Common Stock | Sale | -1.48% | $110,245 | $64.85 | -1,700 | 112,904 | 16 Mar 2026 | Direct |
| Kevin R. Sayer | DXCM | Common Stock | Tax liability | -7.36% | -32,498 | 409,241 | 08 Mar 2026 | Direct | ||
| Kevin R. Sayer | DXCM | Common Stock | Award | 8.01% | 32,749 | 441,739 | 08 Mar 2026 | Direct | ||
| Jereme M. Sylvain | DXCM | Common Stock | Tax liability | -11% | -18,950 | 153,292 | 08 Mar 2026 | Direct | ||
| Jereme M. Sylvain | DXCM | Common Stock | Award | 39.5% | 48,774 | 172,242 | 08 Mar 2026 | Direct | ||
| Michael Jon Brown | DXCM | Common Stock | Tax liability | -16.9% | -23,325 | 114,604 | 08 Mar 2026 | Direct | ||
| Michael Jon Brown | DXCM | Common Stock | Award | 39.4% | 39,019 | 137,929 | 08 Mar 2026 | Direct | ||
| Sadie Stern | DXCM | Common Stock | Tax liability | -11.6% | -17,199 | 131,510 | 08 Mar 2026 | Direct | ||
| Sadie Stern | DXCM | Common Stock | Award | 35.6% | 39,019 | 148,709 | 08 Mar 2026 | Direct | ||
| Jacob Steven Leach | DXCM | Common Stock | Tax liability | -4.47% | -19,757 | 421,810 | 08 Mar 2026 | Direct | ||
| Jacob Steven Leach | DXCM | Common Stock | Award | 31% | 104,516 | 441,567 | 08 Mar 2026 | Direct | ||
| Jon Coleman | DXCM | Common Stock | Award | 63.9% | 43,897 | 112,635 | 08 Mar 2026 | Direct | ||
| Albert Frederick Osterloh IV | DXCM | Common Stock | Award | 7,061 | 7,061 | 26 Feb 2026 | Direct | |||
| Bridgette P. Heller | DXCM | Common Stock | Sale | -3.74% | $68,826 | $68.01 | -1,012 | 26,019 | 12 Feb 2026 | Direct |
| Jacob Steven Leach | DXCM | Common Stock | Tax liability | -0.9% | -3,058 | 337,051 | 29 Jan 2026 | Direct | ||
| Jacob Steven Leach | DXCM | Common Stock | Award | 2.5% | 8,310 | 340,109 | 29 Jan 2026 | Direct | ||
| Sadie Stern | DXCM | Common Stock | Tax liability | -2.36% | -2,656 | 109,690 | 29 Jan 2026 | Direct | ||
| Sadie Stern | DXCM | Common Stock | Award | 6.77% | 7,123 | 112,346 | 29 Jan 2026 | Direct | ||
| Jereme M. Sylvain | DXCM | Common Stock | Tax liability | -2.11% | -2,652 | 123,207 | 29 Jan 2026 | Direct | ||
| Jereme M. Sylvain | DXCM | Common Stock | Award | 6% | 7,123 | 125,859 | 29 Jan 2026 | Direct | ||
| Michael Jon Brown | DXCM | Common Stock | Tax liability | -2.62% | -2,653 | 98,655 | 29 Jan 2026 | Direct |
* marks a reported price that did not pass the local price check.