investing-statsSEC Form 4 insider transactions

DXCM · DEXCOM INC

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Surgical & 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)
Recent Form 4 filings for DXCM
FiledDate the Form 4 was filed with the SEC (due within 2 business days of the trade).InsiderRoleCodeSEC 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 ▼).SharesNumber of shares in this transaction.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
2026-08-28Stern SadieOfficer (EVP Chief People & Culture Off)S sell10b5-12,5650$88.37$226.7K126,043−2%−<0.01% (now 0.03%)filing
2026-08-25Leach Jacob StevenDirector, Officer (President, CEO, and Director)F sell1,4510$92.34$134.0K418,908−0.3%−<0.01% (now 0.11%)filing
2026-08-25Sylvain Jereme MOfficer (EVP, Chief Financal Officer)F sell1,4510$92.34$134.0K150,390−1.0%−<0.01% (now 0.04%)filing
2026-08-25Stern SadieOfficer (EVP Chief People & Culture Off)F sell1,4510$92.34$134.0K128,608−1%−<0.01% (now 0.03%)filing
2026-08-25Brown Michael JonOfficer (EVP Chief Legal Compliance Off)F sell1,4510$92.34$134.0K101,502−1%−<0.01% (now 0.03%)filing
2026-08-24SAYER KEVIN RDirector, Officer (Executive Chair)S sell10b5-1970$91.41$8.9K302,214−<0.1%−<0.01% (now 0.08%)filing
2026-08-24SAYER KEVIN RDirector, Officer (Executive Chair)S sell10b5-17,3510$90.78$667.3K302,311−2%−<0.01% (now 0.08%)filing
2026-08-24SAYER KEVIN RDirector, Officer (Executive Chair)S sell10b5-119,3080$89.71$1.73M309,662−6%−<0.01% (now 0.08%)filing
2026-08-17Brown Michael JonOfficer (EVP Chief Legal Compliance Off)S sell10b5-11,7000$91.93$156.3K102,953−2%−<0.01% (now 0.03%)filing
2026-08-13Heller Bridgette PDirectorS sell10b5-11,0120$88.29$89.3K29,570−3%−<0.01% (now <0.01%)filing
2026-08-13AUGUSTINOS NICHOLASDirectorG sell1,075037,382−3%−<0.01% (now <0.01%)filing
2026-08-04FOLETTA MARK GDirectorS sell10b5-12,0000$85.32$170.6K48,852−4%−<0.01% (now 0.01%)filing
2026-08-04FOLETTA MARK GDirectorS sell10b5-12,0000$80.00$160.0K50,852−4%−<0.01% (now 0.01%)filing
2026-07-21SAYER KEVIN RDirector, Officer (Executive Chair)S sell10b5-126,7560$76.32$2.04M328,970−8%−<0.01% (now 0.09%)filing
2026-07-16Brown Michael JonOfficer (EVP Chief Legal Compliance Off)S sell10b5-11,7000$74.42$126.5K104,653−2%−<0.01% (now 0.03%)filing
2026-07-07SAYER KEVIN RDirector, Officer (Executive Chair)S sell10b5-126,7560$72.00$1.93M355,726−7%−<0.01% (now 0.09%)filing
2026-06-17FOLETTA MARK GDirectorS sell10b5-11990$74.82$14.9K52,852−0.4%−<0.01% (now 0.01%)filing
2026-06-17FOLETTA MARK GDirectorS sell10b5-13,8010$74.10$281.7K53,051−7%−<0.01% (now 0.01%)filing
2026-06-17Brown Michael JonOfficer (EVP Chief Legal Compliance Off)S sell10b5-11,7000$75.55$128.4K106,353−2%−<0.01% (now 0.03%)filing
2026-06-05Coleman JonOfficer (EVP, Chief Commercial Officer)S sell10b5-14,9110$74.13$364.1K95,450−5%−<0.01% (now 0.03%)filing
2026-06-05Coleman JonOfficer (EVP, Chief Commercial Officer)S sell10b5-14,9120$73.00$358.6K100,361−5%−<0.01% (now 0.03%)filing
2026-06-01Malady KyleDirectorA buy5,575028,242+25%+<0.01% (now <0.01%)filing
2026-06-01FOLETTA MARK GDirectorA buy6,33106,331new+<0.01% (now <0.01%)filing
2026-06-01Heller Bridgette PDirectorA buy5,575030,582+22%+<0.01% (now <0.01%)filing
2026-06-01Osterloh Albert Frederick IVDirectorA buy1,63008,691+23%+<0.01% (now <0.01%)filing
2026-06-01Driscoll RimmaDirectorA buy5,605017,319+48%+<0.01% (now <0.01%)filing
2026-06-01GALA RENEE DDirectorA buy5,605012,486+81%+<0.01% (now <0.01%)filing
2026-06-01Collins Richard AlexanderDirectorA buy5,60505,605new+<0.01% (now <0.01%)filing
2026-06-01Ashley Euan A.DirectorA buy5,565012,731+78%+<0.01% (now <0.01%)filing
2026-06-01AUGUSTINOS NICHOLASDirectorA buy5,57505,575new+<0.01% (now <0.01%)filing
2026-06-01ALTMAN STEVEN RDirectorA buy5,56505,565new+<0.01% (now <0.01%)filing
2026-05-27Leach Jacob StevenDirector, Officer (President, CEO, and Director)F sell1,4510$71.90$104.3K420,359−0.3%−<0.01% (now 0.11%)filing
2026-05-27Sylvain Jereme MOfficer (EVP, Chief Financal Officer)F sell1,4510$71.90$104.3K151,841−0.9%−<0.01% (now 0.04%)filing
2026-05-27Stern SadieOfficer (EVP Chief People & Culture Off)F sell1,4510$71.90$104.3K130,059−1%−<0.01% (now 0.03%)filing
2026-05-27Coleman JonOfficer (EVP, Chief Commercial Officer)F sell7,3620$71.90$529.3K105,273−7%−<0.01% (now 0.03%)filing
2026-05-27Brown Michael JonOfficer (EVP Chief Legal Compliance Off)F sell1,4510$71.90$104.3K108,053−1%−<0.01% (now 0.03%)filing
2026-05-26SAYER KEVIN RDirector, Officer (Executive Chair)S sell10b5-126,7590$72.00$1.93M382,482−7%−<0.01% (now 0.10%)filing
2026-05-19Brown Michael JonOfficer (EVP, Chief Legal Officer)S sell10b5-11,7000$59.91$101.8K109,504−2%−<0.01% (now 0.03%)filing
2026-05-14Heller Bridgette PDirectorS sell10b5-11,0120$60.01$60.7K25,007−4%−<0.01% (now <0.01%)filing
2026-05-11FOLETTA MARK GDirectorG buy5,731056,852+11%+<0.01% (now 0.02%)filing
2026-05-11FOLETTA MARK GDirectorG sell5,73100−100%−<0.01% (now 0%)filing
2026-05-11Collins Richard AlexanderDirectorG buy5,074040,162+14%+<0.01% (now 0.01%)filing
2026-05-11Collins Richard AlexanderDirectorG sell5,07400−100%−<0.01% (now 0%)filing
2026-05-11AUGUSTINOS NICHOLASDirectorG buy5,046038,457+15%+<0.01% (now 0.01%)filing
2026-05-11AUGUSTINOS NICHOLASDirectorG sell5,04600−100%−<0.01% (now 0%)filing
2026-05-11ALTMAN STEVEN RDirectorG buy5,037063,667+9%+<0.01% (now 0.02%)filing
2026-05-11ALTMAN STEVEN RDirectorG sell5,03700−100%−<0.01% (now 0%)filing
2026-04-16Brown Michael JonOfficer (EVP, Chief Legal Officer)S sell10b5-11,7000$63.04$107.2K111,204−2%−<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.