XOOMAR

DEXCOM INC (DXCM)

Every FINRA and SEC series the site collects for DEXCOM INC: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on Nasdaq, classified by the SEC as surgical & medical instruments & apparatus.

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17.6M

Short interest

settlement 2026-08-31

4.3

Days to cover

+6.6% vs prior

79.8%

Short share of volume

2026-09-17

3,579

Fails to deliver

settlement 2026-08-28

Thu 29 Oct

Next earnings

estimated; last year 2025-10-30

-$6.5M

Insider flow, 90 days

0 buys, 14 sells

As of 2026-09-17.

Short interest

FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSON

As of 31 August 2026, short interest in DXCM is 17,626,435 shares, up 81,349 shares over the last month. Over the last 48 readings it ranged from 7,684,165 shares (15 October 2024) to 18,654,724 shares (15 July 2026). The latest reading sits at the top of that range. At the reported average volume of 4.1M shares a day that is 4.3 days to cover.

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SettlementShares shortChangeAvg daily volumeDays to cover
2026-08-3117,626,435+6.6%4,089,5814.31
2026-08-1416,528,608-5.8%5,619,0462.94
2026-07-3117,545,086-6.0%5,089,8083.45
2026-07-1518,654,724+3.0%4,273,6714.37
2026-06-3018,109,268+6.4%5,030,4143.60
2026-06-1517,017,820-2.2%5,375,4913.17
2026-05-2917,394,929-1.0%8,446,6872.06
2026-05-1517,564,139-4.1%6,309,3342.78
2026-04-3018,320,577+20.6%4,621,7843.96
2026-04-1515,190,268+3.2%3,739,0174.06
2026-03-3114,716,509-9.7%4,198,9113.50
2026-03-1316,295,751+6.4%3,912,9144.16
2026-02-2715,321,410+4.9%3,910,6623.92
2026-02-1314,607,048-5.8%5,975,1292.44
2026-01-3015,503,384+0.3%6,003,6122.58
2026-01-1515,457,037+7.2%5,988,9102.58
2025-12-3114,420,388+9.9%3,658,9273.94
2025-12-1513,117,820+0.6%5,455,6932.40
2025-11-2813,046,267-2.7%5,319,4552.45
2025-11-1413,410,567+20.0%9,464,2041.42
2025-10-3111,173,522-3.8%6,288,3061.78
2025-10-1511,617,322-11.2%4,644,4822.50
2025-09-3013,081,852-0.5%8,042,7631.63
2025-09-1513,142,220+18.4%4,303,2263.05

Daily short volume

FINRA Reg SHO, last 60 sessions. JSON

As of 17 September 2026, the short share of DXCM volume is 79.8%, up 34.4 points over the last five sessions. Over the last 52 readings it ranged from 25.8% (19 August 2026) to 79.8% (17 September 2026). The latest reading sits at the top of that range. The latest reading is 25.2 points above the 30-session average of 54.5%, on 1.0M shares reported.

DateShort volumeTotal volumeShort shareExempt
2026-09-17822K1.0M79.8%0
2026-09-16810K1.1M71.9%344
2026-09-151.2M1.8M66.1%273
2026-09-14474K959K49.4%84
2026-09-11586K920K63.7%911
2026-09-10720K1.6M45.3%928
2026-09-09694K1.1M61.6%446
2026-09-08831K2.1M39.5%1,536
2026-09-04439K860K51.0%73
2026-09-03277K506K54.7%0
2026-09-02434K736K59.0%0
2026-09-01484K811K59.7%100
2026-08-31559K801K69.8%115
2026-08-28467K1.0M45.5%55
2026-08-27461K1.1M40.4%0
2026-08-26420K1.1M39.7%3,157
2026-08-25737K2.0M36.0%14,752
2026-08-24522K1.0M50.4%5
2026-08-21577K1.1M53.0%426
2026-08-20921K2.4M38.8%1
2026-08-191.3M5.1M25.8%0
2026-08-18543K1.1M50.2%59
2026-08-17522K858K60.9%7,533
2026-08-14845K1.5M56.1%34
2026-08-13897K1.7M52.2%371
2026-08-121.5M2.2M69.1%2,696
2026-08-111.4M2.2M64.1%432
2026-08-102.1M3.7M56.1%2,122
2026-08-071.0M1.8M58.9%0
2026-08-06726K1.1M67.9%81

Fails to deliver

SEC, by settlement date. JSON

As of 28 August 2026, the fails-to-deliver balance in DXCM is 3,579 shares, down 16,522 shares over the last settlement date. Over the last 52 readings it ranged from 3 shares (15 April 2026) to 487,024 shares (23 March 2026). The latest reading sits at the bottom of that range.

SettlementShares failedPriceValue
2026-08-283,579$89.29$320K
2026-08-2620,101$89.16$1.8M
2026-08-246,371$92.34$588K
2026-08-1956$89.60$5K
2026-08-1732$89.75$3K
2026-08-134,351$90.80$395K
2026-08-125,328$89.53$477K
2026-08-114$87.65$351
2026-08-041,447$87.31$126K
2026-07-3059$75.14$4K
2026-07-2869,270$73.37$5.1M
2026-07-24108$70.48$8K
2026-07-22536$74.75$40K
2026-07-2093$76.65$7K
2026-07-174,746$77.98$370K
2026-07-1389,166$74.96$6.7M
2026-07-10622$73.02$45K
2026-07-09511$74.06$38K
2026-07-08185$73.57$14K
2026-06-30254$69.98$18K
2026-06-2458$68.92$4K
2026-06-221,000$72.47$72K
2026-06-1870$71.23$5K
2026-06-1652,018$74.22$3.9M
2026-06-154,840$75.37$365K
2026-06-1274,074$75.25$5.6M
2026-06-1166$74.77$5K
2026-06-1010,709$78.19$837K
2026-06-098,630$76.62$661K
2026-06-037$73.45$514

Insider trades

SEC Form 4, newest first, 50 of 100 shown. JSON

Insiders at DXCM reported 14 open-market sells worth $6.5M in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Brown Michael Jon (EVP Chief Legal Compliance Off) on 2026-09-15.

DateInsiderTitleTypeSharesPriceValueOwned after
2026-09-15Brown Michael JonEVP Chief Legal Compliance OffSell2K$84.04$143K100K
2026-09-15AUGUSTINOS NICHOLASn/aSell7K$84.04$550K29K
2026-09-14AUGUSTINOS NICHOLASn/aSell2K$84.02$130K36K
2026-09-10Sylvain Jereme MEVP, Chief Financal OfficerSell4K$83.27$303K147K
2026-09-10Boehnlein Glenn Sn/aGrant6K$0.00$06K
2026-08-27Stern SadieEVP Chief People & Culture OffSell3K$88.37$227K126K
2026-08-22Leach Jacob StevenPresident, CEO, and DirectorTax withholding1K$92.34$134K419K
2026-08-22Sylvain Jereme MEVP, Chief Financal OfficerTax withholding1K$92.34$134K150K
2026-08-22Stern SadieEVP Chief People & Culture OffTax withholding1K$92.34$134K129K
2026-08-22Brown Michael JonEVP Chief Legal Compliance OffTax withholding1K$92.34$134K102K
2026-08-20SAYER KEVIN RExecutive ChairSell97$91.41$9K302K
2026-08-20SAYER KEVIN RExecutive ChairSell7K$90.78$667K302K
2026-08-20SAYER KEVIN RExecutive ChairSell19K$89.71$1.7M310K
2026-08-14Brown Michael JonEVP Chief Legal Compliance OffSell2K$91.93$156K103K
2026-08-12Heller Bridgette Pn/aSell1K$88.29$89K30K
2026-08-12AUGUSTINOS NICHOLASn/aGift1K$0.00$037K
2026-08-03FOLETTA MARK Gn/aSell2K$85.32$171K49K
2026-07-31FOLETTA MARK Gn/aSell2K$80.00$160K51K
2026-07-20SAYER KEVIN RExecutive ChairSell27K$76.32$2.0M329K
2026-07-15Brown Michael JonEVP Chief Legal Compliance OffSell2K$74.42$127K105K
2026-06-15FOLETTA MARK GDirectorSell4K$74.10$282K53K
2026-06-15FOLETTA MARK GDirectorSell199$74.82$15K53K
2026-06-15Brown Michael JonEVP Chief Legal Compliance OffSell2K$75.55$128K106K
2026-06-04Coleman JonEVP, Chief Commercial OfficerSell5K$74.13$364K95K
2026-06-03Coleman JonEVP, Chief Commercial OfficerSell5K$73.00$359K100K
2026-05-28Malady Kylen/aGrant6K$0.00$028K
2026-05-28FOLETTA MARK Gn/aGrant6K$0.00$06K
2026-05-28Heller Bridgette Pn/aGrant6K$0.00$031K
2026-05-28Osterloh Albert Frederick IVn/aGrant2K$0.00$09K
2026-05-28Driscoll Rimman/aGrant6K$0.00$017K
2026-05-28GALA RENEE Dn/aGrant6K$0.00$012K
2026-05-28Collins Richard Alexandern/aGrant6K$0.00$06K
2026-05-28Ashley Euan A.n/aGrant6K$0.00$013K
2026-05-28AUGUSTINOS NICHOLASn/aGrant6K$0.00$06K
2026-05-28ALTMAN STEVEN Rn/aGrant6K$0.00$06K
2026-05-22Leach Jacob StevenPresident, CEO, and DirectorTax withholding1K$71.90$104K420K
2026-05-22Sylvain Jereme MEVP, Chief Financal OfficerTax withholding1K$71.90$104K152K
2026-05-22Stern SadieEVP Chief People & Culture OffTax withholding1K$71.90$104K130K
2026-05-22Coleman JonEVP, Chief Commercial OfficerTax withholding7K$71.90$529K105K
2026-05-22Brown Michael JonEVP Chief Legal Compliance OffTax withholding1K$71.90$104K108K
2026-05-21SAYER KEVIN RExecutive ChairSell27K$72.00$1.9M382K
2026-05-15Brown Michael JonEVP, Chief Legal OfficerSell2K$59.91$102K110K
2026-05-12Heller Bridgette Pn/aSell1K$60.01$61K25K
2026-05-08FOLETTA MARK Gn/aGift6K$0.00$00
2026-05-08Collins Richard Alexandern/aGift5K$0.00$00
2026-05-08AUGUSTINOS NICHOLASn/aGift5K$0.00$00
2026-05-08ALTMAN STEVEN Rn/aGift5K$0.00$00
2026-04-15Brown Michael JonEVP, Chief Legal OfficerSell2K$63.04$107K111K
2026-03-16Brown Michael JonEVP, Chief Legal OfficerSell2K$64.85$110K113K
2026-03-08SAYER KEVIN RExecutive ChairTax withholding32K$68.10$2.2M409K

Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are the rarer, stronger signal.

Planned sales (Form 144)

Newest first. JSON

26 Form 144 notices on file for DXCM worth $12.4M at the prices reported; 13 in the last 90 days worth $8.4M. Latest: MICHAEL BROWN filed on 2026-09-15 to sell 1,700 shares ($143K) from 2026-09-15.

FiledSellerSharesMarket valueOf outstandingSale fromBroker
2026-09-15MICHAEL BROWNOfficer2K$143K0.000%2026-09-15Morgan Stanley Smith Barney LLC Executive Financial Services
2026-09-15AUGUSTINOS NICHOLASDirector7K$550K0.002%2026-09-15Fidelity Brokerage Services LLC
2026-09-14AUGUSTINOS NICHOLASDirector2K$130K0.000%2026-09-14Fidelity Brokerage Services LLC
2026-09-10JEREME SYLVAINOfficer4K$303K0.001%2026-09-10Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-27SADIE STERNOfficer3K$227K0.001%2026-08-27Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-20KEVIN R SAYEROfficer, Director27K$2.4M0.007%2026-08-20Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-14MICHAEL BROWNOfficer2K$156K0.000%2026-08-14Morgan Stanley Smith Barney LLC Executive Financial Services
2026-08-12Heller Bridgette PDirector1K$89K0.000%2026-08-12Fidelity Brokerage Services LLC
2026-08-03FOLETTA MARK GDirector2K$171K0.001%2026-08-03UBS Financial Services, Inc.
2026-07-31FOLETTA MARK GDirector2K$160K0.001%2026-07-31UBS Financial Services, Inc.
2026-07-20KEVIN R SAYEROfficer, Director27K$2.0M0.007%2026-07-20Morgan Stanley Smith Barney LLC Executive Financial Services
2026-07-15MICHAEL BROWNOfficer2K$127K0.000%2026-07-15Morgan Stanley Smith Barney LLC Executive Financial Services
2026-07-06KEVIN R SAYEROfficer, Director27K$1.9M0.007%2026-07-06Morgan Stanley Smith Barney LLC Executive Financial Services
2026-06-15FOLETTA MARK GDirector4K$303K0.001%2026-06-15UBS Financial Services, Inc.
2026-06-15MICHAEL BROWNOfficer2K$128K0.000%2026-06-15Morgan Stanley Smith Barney LLC Executive Financial Services
2026-06-04JON C COLEMANOfficer5K$364K0.001%2026-06-04Morgan Stanley Smith Barney LLC Executive Financial Services
2026-06-03JON C COLEMANOfficer5K$359K0.001%2026-06-03Morgan Stanley Smith Barney LLC Executive Financial Services
2026-05-21KEVIN R SAYEROfficer, Director27K$1.9M0.007%2026-05-21Morgan Stanley Smith Barney LLC Executive Financial Services
2026-05-15MICHAEL BROWNOfficer2K$102K0.000%2026-05-15Morgan Stanley Smith Barney LLC Executive Financial Services
2026-05-12Heller Bridgette PDirector1K$61K0.000%2026-05-12Fidelity Brokerage Services LLC
2026-04-15MICHAEL BROWNOfficer2K$107K0.000%2026-04-15Morgan Stanley Smith Barney LLC Executive Financial Services
2026-03-16MICHAEL BROWNOfficer2K$110K0.000%2026-03-16Morgan Stanley Smith Barney LLC Executive Financial Services
2026-02-12Heller Bridgette PDirector1K$69K0.000%2026-02-12Fidelity Brokerage Services LLC
2025-11-14Collins Richard AlexanderDirector3K$172K0.001%2025-11-14Fidelity Brokerage Services LLC
2025-11-12Heller Bridgette PDirector1K$59K0.000%2025-11-12Fidelity Brokerage Services LLC
2025-11-10Collins Richard AlexanderDirector4K$218K0.001%2025-11-10Fidelity Brokerage Services LLC

Large holders (13D and 13G)

One row per reporting person, newest filing first. JSON

3 holders above 5% have filed on DXCM, all on Schedule 13G (passive). The largest reported stake is Vanguard Capital Management at 7.5% of the class (28,848,218 shares), filed 2026-04-29 for an event on 2026-03-31.

FiledFormHolderSharesOf classEvent
2026-04-2913GVanguard Capital Managementinvestment adviser28.8M7.5%2026-03-31
2026-04-2913GVanguard Portfolio Managementinvestment adviser19.3M5.0%2026-03-31
2026-03-2613G/Ano. 14The Vanguard Groupinvestment adviser00.0%2026-03-13
2025-10-3013G/Ano. 13The Vanguard Groupinvestment adviser49.5M12.6%2025-09-30

13F holders

Tracked managers holding DXCM at their latest 13F. JSON

11 of the 30 tracked managers held DXCM at their latest 13F, $689.8M in total at quarter-end prices. AQR Capital Management is the largest at $218.1M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 6 added shares and 5 cut.

FundQuarterSharesValueOf portfolioChange in shares
AQR Capital Management2026-06-303.2M$218.1M0.08%+1.1M
Citadel Advisors2026-06-302.8M$185.9M0.02%-87.4M
Renaissance Technologies2026-06-301.6M$109.8M0.15%+48K
Citadel Advisors2026-06-3090.1M$84.2M0.01%+87.5M
Millennium Management2026-06-30472K$31.8M0.01%-2.7M
Bridgewater Associates2026-06-30401K$27.0M0.11%+261K
Point72 Asset Management2026-06-30291K$19.6M0.02%-45K
Fisher Asset Management2026-06-3061K$4.1M0.00%-128K
D. E. Shaw & Co.2026-06-3049K$3.3M0.00%+447
Two Sigma Investments2026-06-3047K$3.1M0.00%-1.1M
Millennium Management2026-06-303.1M$2.9M0.00%+1.4M

Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.

Financials

SEC XBRL, as filed. JSON

In Q2 2026 (quarter ended 2026-06-30) DEXCOM INC reported revenue of $1.31B, up 13.1% from the same quarter a year earlier, and net income of $249.1M (0.64 diluted EPS). In FY 2025 it generated $1.44B of operating cash flow and spent $500.0M on buybacks.

Cash
$1.10B
Equity
$2.62B
Total assets
$6.46B
Shares outstanding
377,360,765

Quarterly, last 8 quarters

QuarterPeriod endRevenueNet incomeMarginDiluted EPS
Q2 20262026-06-30$1.31B$249.1M19.0%0.64
Q1 20262026-03-31$1.19B$199.5M16.7%0.51
Q4 2025derived2025-12-31$1.26Bn/an/an/a
Q3 20252025-09-30$1.21B$283.8M23.5%0.70
Q2 20252025-06-30$1.16B$179.8M15.5%0.45
Q1 20252025-03-31$1.04B$105.4M10.2%0.27
Q4 2024derived2024-12-31$1.11Bn/an/an/a
Q3 20242024-09-30$994.2M$134.6M13.5%0.34

Fiscal years, with buybacks and dividends

Fiscal yearEndsRevenueNet incomeOperating cash flowCapexBuybacksDividends
FY 20252025-12-31$4.66Bn/a$1.44B$363.5M$500.0Mn/a
FY 20242024-12-31$4.03Bn/a$989.5M$358.8M$750.0Mn/a
FY 20232023-12-31$3.62Bn/a$748.5M$236.6M$688.7Mn/a
FY 20222022-12-31$2.91Bn/a$669.5M$364.8M$557.7Mn/a
FY 20212021-12-31$2.45Bn/a$442.5M$389.2M$0n/a

Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-23 from the cover page.

What this page is

DEXCOM INC in the regulatory record

Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.

Each section has its own history table, a summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.

This page follows DEXCOM INC (DXCM), SEC CIK 1093557, listed on Nasdaq, classified by the SEC as surgical & medical instruments & apparatus. The cross-market tables live on the short interest and insider transactions hubs.

Source and method

Short interest
FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-31.JSON and CSV
Daily short volume
FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-17.JSON and CSV
Fails to deliver
SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-28.JSON and CSV
Planned sales
SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-09-15.JSON and CSV
Large holders
SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-04-29.JSON and CSV
13F holders
SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
Financials
SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
Earnings dates
SEC EDGAR 8-K Item 2.02 (full-text search)EDGAR full-text search read twice a day; the estimate is last year's date plus 52 weeks. Latest 2026-07-30.JSON and CSV
Insider trades
SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-09-15.JSON and CSV
Company record
EDGAR filing index for CIK 1093557Ticker, name and exchange from the SEC's company list, refreshed weekly.
Rate limits
30 requests a minute without a key, 120 a minute with a key from a free account.

Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 18 Sep 05:40 UTC.

How to read it

  • Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
  • Insider buys next to a crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short are common and mean little.
  • Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.

Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.

Datasets

Frequently Asked Questions

How much of DXCM is sold short?
17,626,435 shares were held short at the 2026-08-31 settlement, 4.3 days of average volume. FINRA publishes the next count about eight business days after the 15th and the last business day of the month.
What is DXCM's daily short volume?
On 2026-09-17, 822,045 of the 1,030,757 DXCM shares reported to FINRA were sold short, 79.8% of the day's reported volume. Short volume is a flow for one day, not a position.
Does DXCM have fails to deliver?
The SEC's latest file shows 3,579 DXCM shares failed to deliver at settlement 2026-08-28. Fails are reported per settlement date and published twice a month with a lag.
Are DXCM insiders buying or selling?
Insiders at DXCM reported 14 open-market sells worth $6.5M in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Brown Michael Jon (EVP Chief Legal Compliance Off) on 2026-09-15.
Have DXCM insiders filed to sell?
26 Form 144 notices on file for DXCM worth $12.4M at the prices reported; 13 in the last 90 days worth $8.4M. Latest: MICHAEL BROWN filed on 2026-09-15 to sell 1,700 shares ($143K) from 2026-09-15.
Who owns more than 5% of DXCM?
3 holders above 5% have filed on DXCM, all on Schedule 13G (passive). The largest reported stake is Vanguard Capital Management at 7.5% of the class (28,848,218 shares), filed 2026-04-29 for an event on 2026-03-31.
What did DXCM report last quarter?
In Q2 2026 (quarter ended 2026-06-30) DEXCOM INC reported revenue of $1.31B, up 13.1% from the same quarter a year earlier, and net income of $249.1M (0.64 diluted EPS). In FY 2025 it generated $1.44B of operating cash flow and spent $500.0M on buybacks.
Which funds hold DXCM?
11 of the 30 tracked managers held DXCM at their latest 13F, $689.8M in total at quarter-end prices. AQR Capital Management is the largest at $218.1M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 6 added shares and 5 cut.

Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.