DXCM · DEXCOM INC
← all insidersSurgical & Medical Instruments & Apparatus · Listed on Nasdaq
Open-market insider flow over 30d · 90d · 180d · 365d · filter in table · CSV · JSON
Open-market trades14
Distinct insiders5
Bought$0
Sold$7.73M
Net flow$-7.73M
Recent filings
How to read this
- Filed
- Date the Form 4 was filed with the SEC. Insiders must file within 2 business days of the trade.
- Ticker
- The issuer's stock symbol. Select it to open that company's insider-activity page.
- Issuer
- The company whose shares were traded.
- Sector
- The issuer's industry (SEC SIC classification). Select a value to filter to that sector.
- Insider
- The reporting person: an officer, director, or 10% owner. Select a name to see all of their trades.
- Role
- The insider's relationship to the company: director, officer, or 10% owner.
- Code
- SEC transaction code describing the kind of transaction. Full official definitions are under “Transaction codes” below. A dot marks an open-market trade (P/S), the highest-conviction signal.
- Side
- Direction of the trade, from the filing's Acquired (A) ▲ / Disposed of (D) ▼ field: a buy or a sell.
- 10b5-1
- Trade made under a pre-arranged Rule 10b5-1 plan: scheduled in advance, not a discretionary decision (generally lower signal).
- Shares
- Number of shares in this transaction.
- Price
- Reported price per share. Blank for grants, gifts, and other trades with no stated price.
- Value
- Transaction value = shares × price. Left blank for grants, option exercises, gifts, and conversions, which have no cash price (see Own Δ for their impact).
- Owned after
- Form 4 column “Amount of Securities Beneficially Owned Following Reported Transaction(s)”: shares the insider held (directly or indirectly) immediately after this trade.
- Own Δ
- How much this trade changed the insider's own holding versus what they held just before it (not a share of the company). +45% grew it by 45%, 2.0× more than doubled it, −100% sold the entire stake, “new” built a position from nothing.
- Co. Δ
- Change in the insider's stake as a share of the whole company from this trade (transaction shares ÷ shares outstanding). The “(now …)” figure is their resulting total stake. Based on the latest reported shares outstanding; blank when unavailable.
- D/I
- Form 4 column “Ownership Form: Direct (D) or Indirect (I)”. Indirect holdings (for example, through a trust, fund, or family member) are detailed in the filing's “Nature of Indirect Beneficial Ownership.”
- Lag
- Days from the trade date to the filing date (Form 4 is due within 2 business days).
Transaction codes
Verbatim from the SEC's General Instructions for Forms 3, 4 and 5.
- P
- Open market or private purchase of non-derivative or derivative security
- S
- Open market or private sale of non-derivative or derivative security
- A
- Grant, award or other acquisition pursuant to Rule 16b-3(d)
- D
- Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e)
- F
- Payment of exercise price or tax liability by delivering or withholding securities incident to the receipt, exercise or vesting of a security issued in accordance with Rule 16b-3
- M
- Exercise or conversion of derivative security exempted pursuant to Rule 16b-3
- G
- Bona fide gift
- C
- Conversion of derivative security
- X
- Exercise of in-the-money or at-the-money derivative security
- J
- Other acquisition or disposition (describe transaction)
| Filed ↓Date the Form 4 was filed with the SEC (due within 2 business days of the trade). | Insider | Role | CodeSEC transaction code describing the kind of transaction. See “How to read this” above for the official SEC definition of each code. The dot marks an open-market trade (P/S). | SideDirection of the trade: a buy (acquired ▲) or a sell (disposed ▼). | Shares | PriceReported price per share. Blank for trades with no stated price. | ValueTransaction value = shares × price. Left blank for grants, option exercises, gifts, and conversions, which have no cash price (see Own Δ). | Owned afterShares the insider held (directly or indirectly) immediately after this trade. | Own ΔHow much this trade changed the insider's own holding versus what they held just before it (not a share of the company). +45% grew it by 45%, 2.0× more than doubled it, −100% sold the entire stake, “new” built a position from nothing. | Co. ΔChange in the insider's stake as a share of the whole company from this trade (transaction shares ÷ shares outstanding). The “(now …)” figure is their resulting total stake in the company. Based on the latest reported shares outstanding; blank when unavailable. | Link to SEC filing |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-08-28 | Stern Sadie | Officer (EVP Chief People & Culture Off) | S | ▼ sell10b5-1 | 2,5650 | $88.37 | $226.7K | 126,043 | −2% | −<0.01% (now 0.03%) | filing |
| 2026-08-25 | Leach Jacob Steven | Director, Officer (President, CEO, and Director) | F | ▼ sell | 1,4510 | $92.34 | $134.0K | 418,908 | −0.3% | −<0.01% (now 0.11%) | filing |
| 2026-08-25 | Sylvain Jereme M | Officer (EVP, Chief Financal Officer) | F | ▼ sell | 1,4510 | $92.34 | $134.0K | 150,390 | −1.0% | −<0.01% (now 0.04%) | filing |
| 2026-08-25 | Stern Sadie | Officer (EVP Chief People & Culture Off) | F | ▼ sell | 1,4510 | $92.34 | $134.0K | 128,608 | −1% | −<0.01% (now 0.03%) | filing |
| 2026-08-25 | Brown Michael Jon | Officer (EVP Chief Legal Compliance Off) | F | ▼ sell | 1,4510 | $92.34 | $134.0K | 101,502 | −1% | −<0.01% (now 0.03%) | filing |
| 2026-08-24 | SAYER KEVIN R | Director, Officer (Executive Chair) | S | ▼ sell10b5-1 | 970 | $91.41 | $8.9K | 302,214 | −<0.1% | −<0.01% (now 0.08%) | filing |
| 2026-08-24 | SAYER KEVIN R | Director, Officer (Executive Chair) | S | ▼ sell10b5-1 | 7,3510 | $90.78 | $667.3K | 302,311 | −2% | −<0.01% (now 0.08%) | filing |
| 2026-08-24 | SAYER KEVIN R | Director, Officer (Executive Chair) | S | ▼ sell10b5-1 | 19,3080 | $89.71 | $1.73M | 309,662 | −6% | −<0.01% (now 0.08%) | filing |
| 2026-08-17 | Brown Michael Jon | Officer (EVP Chief Legal Compliance Off) | S | ▼ sell10b5-1 | 1,7000 | $91.93 | $156.3K | 102,953 | −2% | −<0.01% (now 0.03%) | filing |
| 2026-08-13 | Heller Bridgette P | Director | S | ▼ sell10b5-1 | 1,0120 | $88.29 | $89.3K | 29,570 | −3% | −<0.01% (now <0.01%) | filing |
| 2026-08-13 | AUGUSTINOS NICHOLAS | Director | G | ▼ sell | 1,0750 | — | — | 37,382 | −3% | −<0.01% (now <0.01%) | filing |
| 2026-08-04 | FOLETTA MARK G | Director | S | ▼ sell10b5-1 | 2,0000 | $85.32 | $170.6K | 48,852 | −4% | −<0.01% (now 0.01%) | filing |
| 2026-08-04 | FOLETTA MARK G | Director | S | ▼ sell10b5-1 | 2,0000 | $80.00 | $160.0K | 50,852 | −4% | −<0.01% (now 0.01%) | filing |
| 2026-07-21 | SAYER KEVIN R | Director, Officer (Executive Chair) | S | ▼ sell10b5-1 | 26,7560 | $76.32 | $2.04M | 328,970 | −8% | −<0.01% (now 0.09%) | filing |
| 2026-07-16 | Brown Michael Jon | Officer (EVP Chief Legal Compliance Off) | S | ▼ sell10b5-1 | 1,7000 | $74.42 | $126.5K | 104,653 | −2% | −<0.01% (now 0.03%) | filing |
| 2026-07-07 | SAYER KEVIN R | Director, Officer (Executive Chair) | S | ▼ sell10b5-1 | 26,7560 | $72.00 | $1.93M | 355,726 | −7% | −<0.01% (now 0.09%) | filing |
| 2026-06-17 | FOLETTA MARK G | Director | S | ▼ sell10b5-1 | 1990 | $74.82 | $14.9K | 52,852 | −0.4% | −<0.01% (now 0.01%) | filing |
| 2026-06-17 | FOLETTA MARK G | Director | S | ▼ sell10b5-1 | 3,8010 | $74.10 | $281.7K | 53,051 | −7% | −<0.01% (now 0.01%) | filing |
| 2026-06-17 | Brown Michael Jon | Officer (EVP Chief Legal Compliance Off) | S | ▼ sell10b5-1 | 1,7000 | $75.55 | $128.4K | 106,353 | −2% | −<0.01% (now 0.03%) | filing |
| 2026-06-05 | Coleman Jon | Officer (EVP, Chief Commercial Officer) | S | ▼ sell10b5-1 | 4,9110 | $74.13 | $364.1K | 95,450 | −5% | −<0.01% (now 0.03%) | filing |
| 2026-06-05 | Coleman Jon | Officer (EVP, Chief Commercial Officer) | S | ▼ sell10b5-1 | 4,9120 | $73.00 | $358.6K | 100,361 | −5% | −<0.01% (now 0.03%) | filing |
| 2026-06-01 | Malady Kyle | Director | A | ▲ buy | 5,5750 | — | — | 28,242 | +25% | +<0.01% (now <0.01%) | filing |
| 2026-06-01 | FOLETTA MARK G | Director | A | ▲ buy | 6,3310 | — | — | 6,331 | new | +<0.01% (now <0.01%) | filing |
| 2026-06-01 | Heller Bridgette P | Director | A | ▲ buy | 5,5750 | — | — | 30,582 | +22% | +<0.01% (now <0.01%) | filing |
| 2026-06-01 | Osterloh Albert Frederick IV | Director | A | ▲ buy | 1,6300 | — | — | 8,691 | +23% | +<0.01% (now <0.01%) | filing |
| 2026-06-01 | Driscoll Rimma | Director | A | ▲ buy | 5,6050 | — | — | 17,319 | +48% | +<0.01% (now <0.01%) | filing |
| 2026-06-01 | GALA RENEE D | Director | A | ▲ buy | 5,6050 | — | — | 12,486 | +81% | +<0.01% (now <0.01%) | filing |
| 2026-06-01 | Collins Richard Alexander | Director | A | ▲ buy | 5,6050 | — | — | 5,605 | new | +<0.01% (now <0.01%) | filing |
| 2026-06-01 | Ashley Euan A. | Director | A | ▲ buy | 5,5650 | — | — | 12,731 | +78% | +<0.01% (now <0.01%) | filing |
| 2026-06-01 | AUGUSTINOS NICHOLAS | Director | A | ▲ buy | 5,5750 | — | — | 5,575 | new | +<0.01% (now <0.01%) | filing |
| 2026-06-01 | ALTMAN STEVEN R | Director | A | ▲ buy | 5,5650 | — | — | 5,565 | new | +<0.01% (now <0.01%) | filing |
| 2026-05-27 | Leach Jacob Steven | Director, Officer (President, CEO, and Director) | F | ▼ sell | 1,4510 | $71.90 | $104.3K | 420,359 | −0.3% | −<0.01% (now 0.11%) | filing |
| 2026-05-27 | Sylvain Jereme M | Officer (EVP, Chief Financal Officer) | F | ▼ sell | 1,4510 | $71.90 | $104.3K | 151,841 | −0.9% | −<0.01% (now 0.04%) | filing |
| 2026-05-27 | Stern Sadie | Officer (EVP Chief People & Culture Off) | F | ▼ sell | 1,4510 | $71.90 | $104.3K | 130,059 | −1% | −<0.01% (now 0.03%) | filing |
| 2026-05-27 | Coleman Jon | Officer (EVP, Chief Commercial Officer) | F | ▼ sell | 7,3620 | $71.90 | $529.3K | 105,273 | −7% | −<0.01% (now 0.03%) | filing |
| 2026-05-27 | Brown Michael Jon | Officer (EVP Chief Legal Compliance Off) | F | ▼ sell | 1,4510 | $71.90 | $104.3K | 108,053 | −1% | −<0.01% (now 0.03%) | filing |
| 2026-05-26 | SAYER KEVIN R | Director, Officer (Executive Chair) | S | ▼ sell10b5-1 | 26,7590 | $72.00 | $1.93M | 382,482 | −7% | −<0.01% (now 0.10%) | filing |
| 2026-05-19 | Brown Michael Jon | Officer (EVP, Chief Legal Officer) | S | ▼ sell10b5-1 | 1,7000 | $59.91 | $101.8K | 109,504 | −2% | −<0.01% (now 0.03%) | filing |
| 2026-05-14 | Heller Bridgette P | Director | S | ▼ sell10b5-1 | 1,0120 | $60.01 | $60.7K | 25,007 | −4% | −<0.01% (now <0.01%) | filing |
| 2026-05-11 | FOLETTA MARK G | Director | G | ▲ buy | 5,7310 | — | — | 56,852 | +11% | +<0.01% (now 0.02%) | filing |
| 2026-05-11 | FOLETTA MARK G | Director | G | ▼ sell | 5,7310 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-05-11 | Collins Richard Alexander | Director | G | ▲ buy | 5,0740 | — | — | 40,162 | +14% | +<0.01% (now 0.01%) | filing |
| 2026-05-11 | Collins Richard Alexander | Director | G | ▼ sell | 5,0740 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-05-11 | AUGUSTINOS NICHOLAS | Director | G | ▲ buy | 5,0460 | — | — | 38,457 | +15% | +<0.01% (now 0.01%) | filing |
| 2026-05-11 | AUGUSTINOS NICHOLAS | Director | G | ▼ sell | 5,0460 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-05-11 | ALTMAN STEVEN R | Director | G | ▲ buy | 5,0370 | — | — | 63,667 | +9% | +<0.01% (now 0.02%) | filing |
| 2026-05-11 | ALTMAN STEVEN R | Director | G | ▼ sell | 5,0370 | — | — | 0 | −100% | −<0.01% (now 0%) | filing |
| 2026-04-16 | Brown Michael Jon | Officer (EVP, Chief Legal Officer) | S | ▼ sell10b5-1 | 1,7000 | $63.04 | $107.2K | 111,204 | −2% | −<0.01% (now 0.03%) | filing |
Up to 200 most recent filings · select a heading to sort, or open “How to read this” above for definitions · this company on SEC EDGAR.