Tandem Diabetes Care, Inc.
MX ˙ BMV ˙ US8753722037
SecurityMX:TNDM / Tandem Diabetes Care, Inc.
InstitutionUs Bancorp \de\
Latest Disclosed Ownership2,209 shares
Latest Disclosed Value $ 42,346
Us Bancorp \de\ reports 9.41% increase in ownership of TNDM / Tandem Diabetes Care, Inc.

On May 14, 2026 - Us Bancorp \de\ filed a 13F-HR form disclosing ownership of 2,209 shares of Tandem Diabetes Care, Inc. (MX:TNDM) valued at $42,346 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 30, 2026 disclosing 2,019 shares of Tandem Diabetes Care, Inc.. This represents a change in shares of 9.41% during the quarter.

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)
2026-05-14 2026-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 2,209 190 9.41 42 -4.55 0.0000
2026-01-30 2025-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 2,019 -336 -14.27 44 57.14 0.0001
2025-11-12 2025-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 2,355 -33,005 -93.34 29 -95.75 0.0000
2025-07-24 2025-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 35,360 -7,328 -17.17 659 -19.34 0.0008
2025-05-08 2025-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 42,688 3,980 10.28 818 -41.39 0.0011
2025-02-05 2024-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 38,708 5,108 15.20 1,394 -2.11 0.0018
2024-10-28 2024-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 33,600 -3,320 -8.99 1,425 -4.24 0.0018
2024-08-07 2024-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 36,920 903 2.51 1,488 16.63 0.0020
2024-05-08 2024-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 36,017 -356 -0.98 1,275 18.60 0.0018
2024-02-09 2023-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 36,373 25,077 222.00 1,076 359.40 0.0016
2023-11-03 2023-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 11,296 498 4.61 235 -11.36 0.0004
2023-08-10 2023-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 10,798 -370 -3.31 265 -41.72 0.0004
2023-05-09 2023-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 11,168 74 0.67 454 -9.04 0.0008
2023-02-13 2022-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 11,094 -2,250 -16.86 499 -21.82 0.0009
2022-10-27 2022-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 13,344 3,295 32.79 637 6.70 0.0013
2022-08-01 2022-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 10,049 -520 -4.92 597 -51.42 0.0012
2022-05-11 2022-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 10,569 853 8.78 1,229 -15.99 0.0020
2022-02-11 2021-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 9,716 477 5.16 1,463 32.64 0.0023
2021-11-10 2021-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 9,239 3,812 70.24 1,103 108.51 0.0021
2021-08-05 2021-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 5,427 1,178 27.72 529 41.07 0.0010
2021-04-28 2021-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 4,249 3,454 434.47 375 393.42 0.0008
2021-02-04 2020-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 795 112 16.40 76 -1.30 0.0002
2020-11-10 2020-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 683 50 7.90 77 22.22 0.0002
2020-08-07 2020-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 633 -731 -53.59 63 -28.41 0.0002
2020-05-13 2020-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 1,364 200 17.18 88 25.71 0.0003
2020-02-04 2019-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 1,164 585 101.04 70 105.88 0.0002
2019-11-08 2019-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 579 -3,479 -85.73 34 -87.02 0.0001
2019-08-13 2019-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 4,058 775 23.61 262 25.96 0.0007
2019-05-08 2019-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 3,283 -362 -9.93 208 49.64 0.0006
2019-02-13 2018-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372203 3,645 1,156 46.44 139 29.91 0.0004
2018-10-31 2018-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 2,489 1,989 397.80 107 872.73 0.0003
2018-08-08 2018-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372203 500 500 11 0.0000
2016-08-10 2016-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372104 0 -1,193 -100.00 0 -100.00
2016-05-13 2016-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372104 1,193 824 223.31 10 150.00 0.0000
2016-02-10 2015-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372104 369 -834 -69.33 4 -63.64 0.0000
2015-11-16 2015-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372104 1,203 -13 -1.07 11 -15.38 0.0000
2015-08-10 2015-06-30 13F TANDEM DIABETES CARE COMMON STOCK 875372104 1,216 -28 -2.25 13 -18.75 0.0001
2015-05-08 2015-03-31 13F TANDEM DIABETES CARE COMMON STOCK 875372104 1,244 -96 -7.16 16 -5.88 0.0001
2015-02-13 2014-12-31 13F TANDEM DIABETES CARE COMMON STOCK 875372104 1,340 -569 -29.81 17 -34.62 0.0001
2014-11-14 2014-09-30 13F TANDEM DIABETES CARE COMMON STOCK 875372104 1,909 1,909 26 0.0001
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.