Tandem Diabetes Care, Inc.
US ˙ NasdaqGM ˙ US8753722037

SecurityTNDM / Tandem Diabetes Care, Inc.
InstitutionFirst Horizon Advisors, Inc.
Latest Disclosed Ownership1,629 shares
Latest Disclosed Value $ 30,364
First Horizon Advisors, Inc. reports 52.10% increase in ownership of TNDM / Tandem Diabetes Care, Inc.

On August 6, 2025 - First Horizon Advisors, Inc. filed a 13F-HR form disclosing ownership of 1,629 shares of Tandem Diabetes Care, Inc. (US:TNDM) valued at $30,365 USD as of June 30, 2025. The entity filed a previous 13F-HR on April 28, 2025 disclosing 1,071 shares of Tandem Diabetes Care, Inc.. This represents a change in shares of 52.10% during the quarter. The current value of the position is $31,684 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2025-08-06 2025-06-30 13F TANDEM DIABETES CARE INC COM COMMON STOCK 875372203 1,629 558 52.10 30 50.00 0.0008
2025-04-28 2025-03-31 13F TANDEM DIABETES CARE INC COM COMMON STOCK 875372203 1,071 96 9.85 21 -42.86 0.0006
2025-02-03 2024-12-31 13F TANDEM DIABETES CARE INC COM COMMON STOCK 875372203 975 214 28.12 35 9.38 0.0010
2024-11-08 2024-09-30 13F TANDEM DIABETES CARE INC COM COMMON STOCK 875372203 761 143 23.14 32 33.33 0.0009
2024-07-19 2024-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 618 74 13.60 25 26.32 0.0008
2024-04-26 2024-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 544 31 6.04 19 26.67 0.0006
2024-02-06 2023-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 513 314 157.79 15 275.00 0.0005
2023-10-27 2023-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 199 199 4 0.0001
2023-05-15 2023-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 0 -9 -100.00 0 0.0000
2023-02-10 2022-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 9 -40 -81.63 0 -100.00 0.0000
2022-11-09 2022-09-30 13F TANDEM DIABETES CARE INC COM COMMON STOCK 875372203 49 -39 -44.32 1 -80.00 0.0000
2022-08-02 2022-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 88 -24 -21.43 5 -61.54 0.0002
2022-05-10 2022-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 112 1 0.90 13 -23.53 0.0005
2022-02-09 2021-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 111 0 0.00 17 30.77 0.0005
2021-11-15 2021-09-30 13F/A-1 TANDEM DIABETES CARE COMMON STOCK 875372203 111 29 35.37 13 62.50 0.0004
2021-11-09 2021-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 111 29 13 0.0002
2021-08-09 2021-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 82 17 26.15 8 33.33 0.0004
2021-05-11 2021-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 65 -19 -22.62 6 -25.00 0.0003
2021-02-11 2020-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 84 -11 -11.58 8 -20.00 0.0005
2020-11-12 2020-09-30 13F TANDEM DIABETES CARE INC COM COMMON STOCK 875372203 95 6 6.74 10 11.11 0.0007
2020-07-31 2020-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 89 0 0.00 9 50.00 0.0007
2020-05-05 2020-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 89 0 0.00 6 20.00 0.0006
2020-01-07 2019-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 89 -39 -30.47 5 -37.50 0.0004
2019-10-23 2019-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 128 128 8 0.0006
2016-07-29 2016-06-30 13F TANDEM DIABETES CARE INC COM USD0.001 COMMON STOCK 875372104 0 -186 -100.00 0 -100.00
2016-05-09 2016-03-31 13F TANDEM DIABETES CARE INC COM USD0.001 COMMON STOCK 875372104 186 0 0.00 1 -50.00 0.0001
2016-02-08 2015-12-31 13F TANDEM DIABETES CARE INC COM USD0.001 COMMON STOCK 875372104 186 -88 -32.12 2 0.00 0.0004
2015-11-06 2015-09-30 13F TANDEM DIABETES CARE INC COM USD0.001 COMMON STOCK 875372104 274 0 0.00 2 0.00 0.0003
2015-08-03 2015-06-30 13F/A-1 TANDEM DIABETES CARE INC COM USD0.001 COMMON STOCK 875372104 274 13 4.98 2 -33.33 0.0003
2015-07-31 2015-06-30 13F TANDEM DIABETES CARE INC COM USD0.001 COMMON STOCK 875372104 5 2
2015-05-04 2015-03-31 13F TANDEM DIABETES CARE INC COM USD0.001 COMMON STOCK 875372104 261 261 3 0.0004
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.