TickerFacts.

Tandem Diabetes Care Inc (TNDM): Shares Outstanding

Annual figures by period end, from SEC filings.

Restated years: each year's figure is from the latest filing that reports it. The company later restated the year ended 2014-12-31 (for example after a spin-off or a discontinued operation), while the year before it was last reported on the old basis. Changes across those points are marked n/c (not comparable), and growth rates are not computed across them.

68.29M
As of 2025-12-31
69.54M
As of 2026-06-30
+1.9%
3-year compound annual growth
+1.8%
5-year compound annual growth
2013-12-31: 22.93M2014-12-31: 23.66M2015-12-31: 30.25M2016-12-31: 3.11M2017-12-31: 10.12M2018-12-31: 57.55M2019-12-31: 59.40M2020-12-31: 62.34M2021-12-31: 63.83M2022-12-31: 64.51M2023-12-31: 65.55M2024-12-31: 66.26M2025-12-31: 68.29M68.29M
2013-12-31 Shares Outstanding (shares) 2025-12-31
Period endedShares OutstandingChange YoYSource filing
2025-12-3168.29M+3.1%2026-02-19, Balance as of period end
2024-12-3166.26M+1.1%2026-02-19, Balance as of period end
2023-12-3165.55M+1.6%2025-02-26, Balance as of period end
2022-12-3164.51M+1.1%2024-02-21, Balance as of period end
2021-12-3163.83M+2.4%2023-02-22, Balance as of period end
2020-12-3162.34M+4.9%2022-02-22, Balance as of period end
2019-12-3159.40M+3.2%2021-02-24, Balance as of period end
2018-12-3157.55M+468.8%2020-02-24, Balance as of period end
2017-12-3110.12M+225.4%2019-02-26, Balance as of period end
2016-12-313.11Mn/c2018-03-01, Balance as of period end
2015-12-3130.25M+27.9%2017-03-08, Balance as of period end
2014-12-3123.66Mn/c2016-02-24, Balance as of period end
2013-12-3122.93Mn/a2015-02-24, Balance as of period end