Who owns DexCom (DXCM)
Which tracked institutional funds hold DXCM, how they are positioned, and who is buying versus exiting — from SEC Form 13F-HR filings. See DXCM company fundamentals →
Ownership as of the 2026-Q2 13F filings (latest filed 2026-09-22). 13F is disclosed up to 45 days after quarter-end, so the most recent quarter fills in over the following weeks.
How the tape is positioned
304 tracked funds added or opened DXCM while 172 trimmed or exited it between 2026-Q1 and 2026-Q2 — the tape is split. When large holders disagree on a name, the funds moving first are sometimes ahead of the story.
A prompt to read the filings, not a verdict. 13F is a quarter-end snapshot disclosed up to 45 days late; a fund adds or exits for mandate, benchmark, and timing reasons that have nothing to do with a view on the stock. This is a starting question, not a signal to trade.
Conviction spread
DXCM’s largest tracked holder by dollar value, BlackRock, Inc., sizes it at 0.0% of its own reported 13F book, while the median holder sizes it at 0.1% of theirs — a 0.0pp gap the other way — the median holder sizes DXCM more heavily than its largest holder by dollar value does.
Book-share is each fund’s reported value in DXCM divided by its whole reported 13F book, so it is comparable across funds of different sizes and is unaffected by stock splits. A higher share means a fund has committed more of its book to the name — a starting question about conviction, not a verdict or a signal to trade.
Institutional & insider positioning
Between 2026-Q1 and 2026-Q2, across 906 tracked filers holding DXCM, 487 increased or opened the position and 494 reduced or closed it; over the same quarter, open-market insider Form 4s were net sales.
This fuses two public signals for the same quarter — how tracked institutions changed their positions and whether insiders bought or sold in the open market. It describes what was filed; it is a starting question, not a verdict or a signal to trade.
New buyers & exits
Funds opening or closing a position in DXCM between the 2026-Q1 and 2026-Q2 13F filings, and the largest changes among funds holding it in both. New buyers and exits are counted on fund presence (split-invariant); adds and trims are measured on reported value.
New buyers 48
- Nearwater Capital Markets, Ltd$84M
- Jupiter Topco LLC$77M
- Smith Group Asset Management, LLC$47M
- CAPITOLIS LIQUID GLOBAL MARKETS LLC$45M
- Capital International Investors$45M
- Blue Sparrow, LLC /DE$32M
Full exits 83
- Amundi$398M
- JANUS HENDERSON GROUP PLC$166M
- SG Americas Securities, LLC$130M
- Capital World Investors$87M
- Thrivent Financial for Lutherans$67M
- JENNISON ASSOCIATES LLC$66M
Largest adds
- BlackRock, Inc.$579M
- Invesco Ltd.$522M
- ARROWSTREET CAPITAL, LIMITED PARTNERSHIP$303M
- Castle Hook Partners LP$210M
- UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC$146M
- UBS Group AG$135M
Largest trims
- JPMORGAN CHASE & CO$139M
- ALLIANCEBERNSTEIN L.P.$123M
- TORONTO DOMINION BANK$76M
- MILLENNIUM MANAGEMENT LLC$75M
- Squarepoint Ops LLC$71M
- TWO SIGMA INVESTMENTS, LP$67M
Institutional holders
One row per tracked fund, most shares held first (every row is from one quarter; reported value breaks ties). “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding.
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| TUDOR INVESTMENT CORP ET AL | 69,150,000 | $65M | 0.3% | 2026-Q2 |
| BlackRock, Inc. added | 38,244,137 | $2.6B | 11.6% | 2026-Q2 |
| VANGUARD CAPITAL MANAGEMENT LLC added | 25,209,752 | $1.7B | 7.7% | 2026-Q2 |
| VANGUARD PORTFOLIO MANAGEMENT LLC added | 19,656,540 | $1.3B | 6.0% | 2026-Q2 |
| STATE STREET CORP added | 18,380,806 | $1.2B | 5.6% | 2026-Q2 |
| Invesco Ltd. added | 15,288,133 | $1.0B | 4.6% | 2026-Q2 |
| BAILLIE GIFFORD & CO trimmed | 14,801,590 | $997M | 4.5% | 2026-Q2 |
| GEODE CAPITAL MANAGEMENT, LLC added | 12,426,515 | $834M | 3.8% | 2026-Q2 |
| ALLIANCEBERNSTEIN L.P. trimmed | 11,693,409 | $734M | 3.3% | 2026-Q2 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 11,261,876 | $758M | 3.4% | 2026-Q2 |
| WELLINGTON MANAGEMENT GROUP LLP trimmed | 8,527,471 | $574M | 2.6% | 2026-Q2 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 6,873,273 | $463M | 2.1% | 2026-Q2 |
| NORGES BANK added | 6,868,090 | $463M | 2.1% | 2026-Q2 |
| UBS Group AG added | 6,065,779 | $409M | 1.8% | 2026-Q2 |
| MORGAN STANLEY added | 5,156,282 | $347M | 1.6% | 2026-Q2 |
| AMERIPRISE FINANCIAL INC added | 4,820,775 | $325M | 1.5% | 2026-Q2 |
| Castle Hook Partners LP added | 3,870,342 | $261M | 1.2% | 2026-Q2 |
| GOLDMAN SACHS GROUP INC added | 3,758,616 | $253M | 1.1% | 2026-Q2 |
| FRANKLIN RESOURCES INC added | 3,595,893 | $242M | 1.1% | 2026-Q2 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 3,560,621 | $241M | 1.1% | 2026-Q2 |
| CIBC Bancorp USA Inc. trimmed | 3,454,735 | $233M | 1.1% | 2026-Q2 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 3,439,164 | $232M | 1.0% | 2026-Q2 |
| JPMORGAN CHASE & CO trimmed | 3,325,095 | $233M | 1.1% | 2026-Q2 |
| NORTHERN TRUST CORP trimmed | 3,295,144 | $222M | 1.0% | 2026-Q2 |
| AQR CAPITAL MANAGEMENT LLC added | 3,237,720 | $218M | 1.0% | 2026-Q2 |
| BANK OF AMERICA CORP /DE/ added | 3,163,604 | $213M | 1.0% | 2026-Q2 |
| RAYMOND JAMES FINANCIAL INC added | 3,087,990 | $208M | 0.9% | 2026-Q2 |
| AMERICAN CENTURY COMPANIES INC added | 3,071,423 | $207M | 0.9% | 2026-Q2 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 2,729,905 | $184M | 0.8% | 2026-Q2 |
| Legal & General Group Plc trimmed | 2,572,193 | $173M | 0.8% | 2026-Q2 |
| DEUTSCHE BANK AG\ trimmed | 2,435,559 | $164M | 0.7% | 2026-Q2 |
| Bank of New York Mellon Corp added | 2,309,648 | $156M | 0.7% | 2026-Q2 |
| BNP PARIBAS FINANCIAL MARKETS added | 2,268,607 | $153M | 0.7% | 2026-Q2 |
| PRICE T ROWE ASSOCIATES INC /MD/ added | 2,238,713 | $151M | 0.7% | 2026-Q2 |
| VANGUARD FIDUCIARY TRUST CO trimmed | 2,217,179 | $149M | 0.7% | 2026-Q2 |
| Employees Provident Fund Board | 2,190,029 | $147M | 0.7% | 2026-Q2 |
| DIMENSIONAL FUND ADVISORS LP added | 2,109,812 | $142M | 0.6% | 2026-Q2 |
| ROYAL BANK OF CANADA added | 2,034,290 | $137M | 0.6% | 2026-Q2 |
| FMR LLC added | 1,893,246 | $128M | 0.6% | 2026-Q2 |
| Nuveen, LLC added | 1,830,235 | $123M | 0.6% | 2026-Q2 |
| NOMURA HOLDINGS INC added | 1,709,370 | $115M | 0.5% | 2026-Q2 |
| BLAIR WILLIAM & CO/IL trimmed | 1,665,665 | $112M | 0.5% | 2026-Q2 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,630,796 | $110M | 0.5% | 2026-Q2 |
| VICTORY CAPITAL MANAGEMENT INC added | 1,367,932 | $92M | 0.4% | 2026-Q2 |
| DSM CAPITAL PARTNERS LLC trimmed | 1,359,135 | $92M | 0.4% | 2026-Q2 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 1,335,411 | $90M | 0.4% | 2026-Q2 |
| CI INVESTMENTS INC. added | 1,287,663 | $87M | 0.4% | 2026-Q2 |
| BANK OF NOVA SCOTIA added | 1,266,285 | $85M | 0.4% | 2026-Q2 |
| DNB Asset Management AS added | 1,255,284 | $85M | 0.4% | 2026-Q2 |
| Nearwater Capital Markets, Ltd new | 1,250,000 | $84M | 0.4% | 2026-Q2 |
| CITADEL ADVISORS LLC trimmed | 1,211,767 | $82M | 0.4% | 2026-Q2 |
| HSBC HOLDINGS PLC added | 1,208,920 | $82M | 0.4% | 2026-Q2 |
| Stephens Investment Management Group LLC added | 1,204,553 | $81M | 0.4% | 2026-Q2 |
| TORONTO DOMINION BANK trimmed | 1,171,697 | $79M | 0.4% | 2026-Q2 |
| Swedbank AB added | 1,166,132 | $79M | 0.4% | 2026-Q2 |
| Jupiter Topco LLC new | 1,138,783 | $77M | 0.3% | 2026-Q2 |
| FIRST TRUST ADVISORS LP added | 1,111,188 | $75M | 0.3% | 2026-Q2 |
| Swiss National Bank trimmed | 1,085,500 | $73M | 0.3% | 2026-Q2 |
| NATIONAL BANK OF CANADA /FI/ trimmed | 1,065,517 | $72M | 0.3% | 2026-Q2 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 1,054,792 | $71M | 0.3% | 2026-Q2 |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP added | 1,043,864 | $70M | 0.3% | 2026-Q2 |
| WELLS FARGO & COMPANY/MN added | 1,011,869 | $68M | 0.3% | 2026-Q2 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. trimmed | 999,900 | $67M | 0.3% | 2026-Q2 |
| BARCLAYS PLC trimmed | 999,563 | $67M | 0.3% | 2026-Q2 |
| Russell Investments Group, Ltd. trimmed | 973,800 | $66M | 0.3% | 2026-Q2 |
| Sumitomo Mitsui Trust Group, Inc. added | 957,366 | $64M | 0.3% | 2026-Q2 |
| CITIGROUP INC added | 956,398 | $64M | 0.3% | 2026-Q2 |
| HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND added | 918,568 | $62M | 0.3% | 2026-Q2 |
| PRINCIPAL FINANCIAL GROUP INC added | 876,681 | $59M | 0.3% | 2026-Q2 |
| Chicago Capital, LLC added | 867,009 | $58M | 0.3% | 2026-Q2 |
| Fisher Funds Management LTD trimmed | 840,950 | $57M | 0.3% | 2026-Q2 |
| Vanguard Global Advisers, LLC trimmed | 833,079 | $56M | 0.3% | 2026-Q2 |
| Bellevue Group AG added | 822,489 | $55M | 0.2% | 2026-Q2 |
| Tri Locum Partners LP added | 820,479 | $55M | 0.2% | 2026-Q2 |
| Allianz Asset Management GmbH | 819,497 | $51M | 0.2% | 2026-Q2 |
| RHUMBLINE ADVISERS trimmed | 768,165 | $52M | 0.2% | 2026-Q2 |
| ENVESTNET ASSET MANAGEMENT INC trimmed | 759,743 | $51M | 0.2% | 2026-Q2 |
| JANE STREET GROUP, LLC added | 750,473 | $51M | 0.2% | 2026-Q2 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. added | 750,088 | $51M | 0.2% | 2026-Q2 |
| VANGUARD ASSET MANAGEMENT, Ltd added | 741,928 | $50M | 0.2% | 2026-Q2 |
| NEUBERGER BERMAN GROUP LLC trimmed | 736,024 | $50M | 0.2% | 2026-Q2 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main trimmed | 713,933 | $48M | 0.2% | 2026-Q2 |
| Smith Group Asset Management, LLC added | 701,347 | $47M | 0.2% | 2026-Q2 |
| Assenagon Asset Management S.A. trimmed | 693,635 | $47M | 0.2% | 2026-Q2 |
| CAPITOLIS LIQUID GLOBAL MARKETS LLC new | 664,600 | $45M | 0.2% | 2026-Q2 |
| PEREGRINE CAPITAL MANAGEMENT LLC added | 664,581 | $45M | 0.2% | 2026-Q2 |
| Capital International Investors new | 661,999 | $45M | 0.2% | 2026-Q2 |
| CAPITAL FUND MANAGEMENT S.A. added | 661,379 | $45M | 0.2% | 2026-Q2 |
| Pictet Asset Management Holding SA trimmed | 661,238 | $45M | 0.2% | 2026-Q2 |
| National Pension Service added | 660,309 | $44M | 0.2% | 2026-Q2 |
| California Public Employees Retirement System added | 638,291 | $43M | 0.2% | 2026-Q2 |
| Korea Investment CORP trimmed | 632,639 | $43M | 0.2% | 2026-Q2 |
| ING GROEP NV trimmed | 613,727 | $41M | 0.2% | 2026-Q2 |
| Susquehanna Portfolio Strategies, LLC added | 612,127 | $41M | 0.2% | 2026-Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH trimmed | 584,004 | $39M | 0.2% | 2026-Q2 |
| Quantinno Capital Management LP added | 583,567 | $39M | 0.2% | 2026-Q2 |
| FEDERATED HERMES, INC. trimmed | 582,421 | $39M | 0.2% | 2026-Q2 |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM trimmed | 581,686 | $39M | 0.2% | 2026-Q2 |
| FIL Ltd added | 558,462 | $38M | 0.2% | 2026-Q2 |
| FRONTIER CAPITAL MANAGEMENT CO LLC added | 547,220 | $37M | 0.2% | 2026-Q2 |
Ownership over time
Tracked institutional holder count and total shares held by filing quarter (independent scales). The curated-era tail and any mid-ingest latest quarter are handled honestly — a partial quarter is not drawn as a collapse.
Reading this table
Funds hold the same stock for different reasons — an index fund “holds” almost everything, an active manager sizes a name to a mandate and a benchmark, and each fund entered at its own price and time. Because 13F is filed up to 45 days after quarter-end, every row is a backward-looking snapshot; a manager may have traded since. Share-class siblings (a company’s A and C shares) are rolled up to one line so a dual-class name is never double-counted. Compare like-for-like. A large holder is not an endorsement, and a fund exiting is not a warning — this is a starting question, not a verdict.
About 13F filings
A Form 13F is a quarterly disclosure that institutional investment managers with over $100 million in US-listed equities must file with the SEC. In plain English: it is a snapshot of the long stock positions a fund held at the end of a quarter. It covers long US-listed equities only — not short positions, options, cash, or private holdings — and the funds shown are the large sample we track, not the complete 13F universe.