Who owns DXCM (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-Q1 13F filings. 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
186 tracked funds added or opened DXCM while 284 trimmed or exited it between 2025-Q4 and 2026-Q1 — 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, VANGUARD GROUP 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 2025-Q4 and 2026-Q1, across 956 tracked filers holding DXCM, 525 increased or opened the position and 432 reduced or closed it; over the same quarter, open-market insider Form 4 buying and selling roughly offset.
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 2025-Q4 and 2026-Q1 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 53
- VANGUARD CAPITAL MANAGEMENT LLC$1.6B
- VANGUARD PORTFOLIO MANAGEMENT LLC$1.2B
- CIBC Bancorp USA Inc.$265M
- VANGUARD FIDUCIARY TRUST CO$140M
- Vanguard Global Advisers, LLC$53M
- MIZUHO MARKETS AMERICAS LLC$50M
Full exits 54
- VANGUARD GROUP INC$3.2B
- CIBC Private Wealth Group LLC$208M
- Vestal Point Capital, LP$85M
- Alphabet Inc.$69M
- TWO SIGMA ADVISERS, LP$50M
- MIG Capital, LLC$40M
Largest adds
- WELLINGTON MANAGEMENT GROUP LLP$381M
- ALLIANCEBERNSTEIN L.P.$285M
- Invesco Ltd.$154M
- UBS Group AG$145M
- TORONTO DOMINION BANK$140M
- CITADEL ADVISORS LLC$126M
Largest trims
- BlackRock, Inc.$648M
- Amundi$480M
- JENNISON ASSOCIATES LLC$318M
- D. E. Shaw & Co., Inc.$260M
- Nuveen, LLC$199M
- Pacer Advisors, Inc.$157M
Institutional holders
One row per tracked fund, largest reported value first. “% of value” is the fund’s share of this security’s tracked institutional value — not of shares outstanding. Rows marked stale are from an earlier filing than the security’s latest quarter — that fund is absent from the newest snapshot (position exited, or reported under a different name).
| Fund | Shares | Reported value | % of value | Quarter |
|---|---|---|---|---|
| BlackRock, Inc. trimmed | 31,800,150 | $2.0B | 8.2% | 2026-Q1 |
| VANGUARD CAPITAL MANAGEMENT LLC new | 25,020,961 | $1.6B | 6.4% | 2026-Q1 |
| VANGUARD PORTFOLIO MANAGEMENT LLC new | 19,219,953 | $1.2B | 5.0% | 2026-Q1 |
| STATE STREET CORP trimmed | 17,934,847 | $1.1B | 4.6% | 2026-Q1 |
| BAILLIE GIFFORD & CO added | 15,599,525 | $980M | 4.0% | 2026-Q1 |
| ALLIANCEBERNSTEIN L.P. added | 12,923,644 | $858M | 3.5% | 2026-Q1 |
| GEODE CAPITAL MANAGEMENT, LLC added | 12,346,638 | $773M | 3.2% | 2026-Q1 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC added | 9,746,174 | $612M | 2.5% | 2026-Q1 |
| WELLINGTON MANAGEMENT GROUP LLP added | 9,307,646 | $585M | 2.4% | 2026-Q1 |
| Invesco Ltd. added | 8,077,454 | $507M | 2.1% | 2026-Q1 |
| Amundi added | 6,332,561 | $398M | 1.6% | 2026-Q1 |
| JPMORGAN CHASE & CO trimmed | 5,999,470 | $371M | 1.5% | 2026-Q1 |
| NORGES BANK trimmed | 4,906,759 | $335M | 1.4% | 2026-Q1 |
| MORGAN STANLEY trimmed | 5,042,044 | $317M | 1.3% | 2026-Q1 |
| UBS Group AG added | 4,349,959 | $273M | 1.1% | 2026-Q1 |
| AMERIPRISE FINANCIAL INC added | 4,240,784 | $266M | 1.1% | 2026-Q1 |
| CIBC Bancorp USA Inc. added | 4,217,134 | $265M | 1.1% | 2026-Q1 |
| NORTHERN TRUST CORP added | 3,425,025 | $215M | 0.9% | 2026-Q1 |
| DEUTSCHE BANK AG\ trimmed | 3,392,733 | $213M | 0.9% | 2026-Q1 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC added | 3,175,299 | $199M | 0.8% | 2026-Q1 |
| GOLDMAN SACHS GROUP INC added | 3,043,635 | $191M | 0.8% | 2026-Q1 |
| AMERICAN CENTURY COMPANIES INC added | 2,945,010 | $185M | 0.8% | 2026-Q1 |
| BANK OF AMERICA CORP /DE/ trimmed | 2,933,726 | $184M | 0.8% | 2026-Q1 |
| RAYMOND JAMES FINANCIAL INC added | 2,782,627 | $174M | 0.7% | 2026-Q1 |
| JANUS HENDERSON GROUP PLC added | 2,644,539 | $166M | 0.7% | 2026-Q1 |
| Legal & General Group Plc added | 2,609,354 | $164M | 0.7% | 2026-Q1 |
| FRANKLIN RESOURCES INC trimmed | 2,607,438 | $164M | 0.7% | 2026-Q1 |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP added | 2,545,103 | $160M | 0.7% | 2026-Q1 |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. added | 2,466,523 | $155M | 0.6% | 2026-Q1 |
| TORONTO DOMINION BANK added | 2,465,363 | $155M | 0.6% | 2026-Q1 |
| VANGUARD FIDUCIARY TRUST CO new | 2,222,559 | $140M | 0.6% | 2026-Q1 |
| Employees Provident Fund Board | 2,190,029 | $138M | 0.6% | 2026-Q1 |
| AQR CAPITAL MANAGEMENT LLC trimmed | 2,164,293 | $136M | 0.6% | 2026-Q1 |
| Bank of New York Mellon Corp trimmed | 2,143,141 | $135M | 0.6% | 2026-Q1 |
| CITADEL ADVISORS LLC added | 2,091,872 | $131M | 0.5% | 2026-Q1 |
| SG Americas Securities, LLC added | 2,065,277 | $130M | 0.5% | 2026-Q1 |
| ROYAL BANK OF CANADA trimmed | 1,974,424 | $124M | 0.5% | 2026-Q1 |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ added | 1,934,452 | $122M | 0.5% | 2026-Q1 |
| BLAIR WILLIAM & CO/IL trimmed | 1,927,387 | $121M | 0.5% | 2026-Q1 |
| DSM CAPITAL PARTNERS LLC trimmed | 1,923,820 | $121M | 0.5% | 2026-Q1 |
| DIMENSIONAL FUND ADVISORS LP added | 1,895,549 | $119M | 0.5% | 2026-Q1 |
| NATIONAL BANK OF CANADA /FI/ added | 1,870,971 | $117M | 0.5% | 2026-Q1 |
| NEUBERGER BERMAN GROUP LLC trimmed | 1,729,163 | $109M | 0.4% | 2026-Q1 |
| Nuveen, LLC trimmed | 1,724,467 | $108M | 0.4% | 2026-Q1 |
| Assenagon Asset Management S.A. added | 1,719,249 | $108M | 0.4% | 2026-Q1 |
| FMR LLC added | 1,671,258 | $105M | 0.4% | 2026-Q1 |
| ADAGE CAPITAL PARTNERS GP, L.L.C. added | 1,666,408 | $105M | 0.4% | 2026-Q1 |
| MILLENNIUM MANAGEMENT LLC added | 1,622,204 | $102M | 0.4% | 2026-Q1 |
| BNP PARIBAS FINANCIAL MARKETS trimmed | 1,600,989 | $101M | 0.4% | 2026-Q1 |
| RENAISSANCE TECHNOLOGIES LLC added | 1,582,996 | $99M | 0.4% | 2026-Q1 |
| PRICE T ROWE ASSOCIATES INC /MD/ trimmed | 1,445,564 | $91M | 0.4% | 2026-Q1 |
| Capital World Investors | 1,384,000 | $87M | 0.4% | 2026-Q1 |
| Mitsubishi UFJ Asset Management Co., Ltd. added | 1,245,638 | $78M | 0.3% | 2026-Q1 |
| VICTORY CAPITAL MANAGEMENT INC added | 1,216,605 | $76M | 0.3% | 2026-Q1 |
| MACKENZIE FINANCIAL CORP trimmed | 1,203,945 | $76M | 0.3% | 2026-Q1 |
| DNB Asset Management AS trimmed | 1,174,086 | $74M | 0.3% | 2026-Q1 |
| HSBC HOLDINGS PLC added | 1,166,543 | $73M | 0.3% | 2026-Q1 |
| Squarepoint Ops LLC trimmed | 1,154,441 | $72M | 0.3% | 2026-Q1 |
| Swiss National Bank added | 1,144,600 | $72M | 0.3% | 2026-Q1 |
| BARCLAYS PLC trimmed | 1,124,334 | $71M | 0.3% | 2026-Q1 |
| TWO SIGMA INVESTMENTS, LP added | 1,114,948 | $70M | 0.3% | 2026-Q1 |
| Stephens Investment Management Group LLC added | 1,074,465 | $67M | 0.3% | 2026-Q1 |
| Thrivent Financial for Lutherans added | 1,067,115 | $67M | 0.3% | 2026-Q1 |
| JENNISON ASSOCIATES LLC trimmed | 1,048,097 | $66M | 0.3% | 2026-Q1 |
| TUDOR INVESTMENT CORP ET AL added | 69,150,000 | $64M | 0.3% | 2026-Q1 |
| Russell Investments Group, Ltd. trimmed | 983,380 | $62M | 0.3% | 2026-Q1 |
| FIRST TRUST ADVISORS LP trimmed | 958,632 | $60M | 0.2% | 2026-Q1 |
| Fisher Funds Management LTD trimmed | 910,584 | $57M | 0.2% | 2026-Q1 |
| Sumitomo Mitsui Trust Group, Inc. trimmed | 908,936 | $57M | 0.2% | 2026-Q1 |
| BANK OF NOVA SCOTIA trimmed | 887,252 | $56M | 0.2% | 2026-Q1 |
| CI INVESTMENTS INC. trimmed | 872,578 | $55M | 0.2% | 2026-Q1 |
| DekaBank Deutsche Girozentrale | 850,305 | $54M | 0.2% | 2026-Q1 |
| Intermede Investment Partners Ltd trimmed | 858,513 | $54M | 0.2% | 2026-Q1 |
| WELLS FARGO & COMPANY/MN added | 845,998 | $53M | 0.2% | 2026-Q1 |
| Vanguard Global Advisers, LLC new | 842,638 | $53M | 0.2% | 2026-Q1 |
| CITIGROUP INC trimmed | 834,087 | $52M | 0.2% | 2026-Q1 |
| CANADA PENSION PLAN INVESTMENT BOARD added | 825,755 | $52M | 0.2% | 2026-Q1 |
| Allianz Asset Management GmbH trimmed | 819,497 | $51M | 0.2% | 2026-Q1 |
| ENVESTNET ASSET MANAGEMENT INC added | 815,519 | $51M | 0.2% | 2026-Q1 |
| Castle Hook Partners LP trimmed | 801,847 | $50M | 0.2% | 2026-Q1 |
| MIZUHO MARKETS AMERICAS LLC new | 800,000 | $50M | 0.2% | 2026-Q1 |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main added | 799,465 | $50M | 0.2% | 2026-Q1 |
| FEDERATED HERMES, INC. trimmed | 793,281 | $50M | 0.2% | 2026-Q1 |
| Bellevue Group AG trimmed | 788,766 | $50M | 0.2% | 2026-Q1 |
| RHUMBLINE ADVISERS trimmed | 772,557 | $49M | 0.2% | 2026-Q1 |
| ING GROEP NV added | 766,341 | $48M | 0.2% | 2026-Q1 |
| Pictet Asset Management Holding SA trimmed | 756,328 | $47M | 0.2% | 2026-Q1 |
| VANGUARD GROUP INC trimmed | 48,890,360 | $3.2B | 13.3% | 2025-Q4 stale |
| SANDS CAPITAL MANAGEMENT, LLC trimmed | 4,934,189 | $332M | 1.4% | 2025-Q3 stale |
| Artisan Partners Limited Partnership added | 2,519,465 | $220M | 0.9% | 2025-Q2 stale |
| CIBC Private Wealth Group LLC added | 3,128,114 | $208M | 0.9% | 2025-Q4 stale |
| AXA S.A. trimmed | 2,167,155 | $189M | 0.8% | 2025-Q2 stale |
| Holocene Advisors, LP added | 2,436,672 | $164M | 0.7% | 2025-Q3 stale |
| Capital Research Global Investors trimmed | 2,367,676 | $159M | 0.7% | 2025-Q3 stale |
| AXA Investment Managers S.A. new | 1,667,464 | $112M | 0.5% | 2025-Q3 stale |
| Vestal Point Capital, LP added | 1,275,000 | $85M | 0.3% | 2025-Q4 stale |
| Champlain Investment Partners, LLC trimmed | 1,086,120 | $73M | 0.3% | 2025-Q3 stale |
| Alphabet Inc. | 1,036,937 | $69M | 0.3% | 2025-Q4 stale |
| Iron Triangle Partners LP added | 850,000 | $57M | 0.2% | 2025-Q3 stale |
| TWO SIGMA ADVISERS, LP added | 748,076 | $50M | 0.2% | 2025-Q4 stale |
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.