Tandem Diabetes Care, Inc. (TNDM) Institutional Ownership & Insider Trading

274 institutions reported holding Tandem Diabetes Care, Inc. shares in 13F filings for the quarter ended 2026-06-30, according to EquiReason's reading of their SEC filings. 2 insider trades on Form 4 since 2025-10-01.

Source: SEC EDGAR filings · figures as of 2026-06-30 · read by EquiReason

TNDMTandem Diabetes Care, Inc.Follow TNDM — free

Medical Devices · Healthcare

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Market cap: 1.2B
P/E TTM: —
Dividend yield: —
52-week: —
Next earnings: 5 Nov, in 12 days

Institutions · all 13F filers

quarter to 30 Jun 2026 · filers in both quarters

274 institutions held —% of the shares. Across filers that reported both quarters, shares held changed +0.2%.

Largest moves, shares (millions)

Institutional flow by quarter

net shares added or trimmed, millions · filers in both quarters

Quarter	Holders	Shares held, M	Change	Increased	New	Decreased	Closed
Jun 26	274	79	+0.2%	90	36	79	38
Mar 26	272	79	+6.9%	89	33	86	28
Dec 25	264	75	+0.2%	80	41	91	25
Sep 25	248	75	-7.5%	66	27	89	51
Jun 25	268	81	+10.5%	108	34	62	34
Mar 25	268	73	+1.5%	99	32	76	73
Dec 24	313	72	-2.1%	125	28	80	42
Sep 24	327	73	-2.3%	106	43	103	40

Tandem Diabetes Care, Inc. — questions

Who owns Tandem Diabetes Care, Inc. stock?: 274 institutions reported Tandem Diabetes Care, Inc. shares in 13F filings for the quarter ended 2026-06-30. The largest: BlackRock, Inc. (16.6%), Sessa Capital IM, L.P. (7.3%), VANGUARD PORTFOLIO MANAGEMENT LLC (6.2%).
Are Tandem Diabetes Care, Inc. insiders buying or selling?: 2 insider trades on Form 4 since 2025-10-01; the full list, with dates, people and plan status, is on this page.

Every figure on this page comes from Tandem Diabetes Care, Inc.'s own SEC filings — see them on SEC EDGAR. Price data is licensed and shown only inside the product.

How these figures are read: methodology · EquiReason.

Important information. Figures on this page are taken from filings submitted to the U.S. Securities and Exchange Commission (SEC) and processed automatically by EquiReason. They may contain errors, omissions or delays, and EquiReason makes no representation or warranty as to their accuracy, completeness or timeliness. Always verify figures against the original filing on SEC EDGAR before relying on them.

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