마지막으로 Diabetes Care, Inc.
MX ˙ BMV ˙ US8753722037
SecurityMX:TNDM / Tandem Diabetes Care, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership29,811 shares
Latest Disclosed Value $ 571,328
Janus Henderson Group Plc ownership in TNDM / Tandem Diabetes Care, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 29,811 shares of Tandem Diabetes Care, Inc. (MX:TNDM) valued at $571,328 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 29,811 shares of Tandem Diabetes Care, Inc.. This represents a change in shares of 0.00% 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)
2026-05-18 2026-03-31 13F/A-1 TANDEM DIABETES CARE COM NEW 875372203 29,811 0 0.00 571 -12.82 0.0001
2026-05-15 2026-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 29,811 0 0.00 571 -12.82 0.0001
2026-02-17 2025-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 29,811 0 0.00 655 80.94 0.0003
2025-11-14 2025-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 29,811 0 0.00 362 -34.77 0.0002
2025-08-14 2025-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 29,811 0 0.00 556 -3.31 0.0003
2025-05-15 2025-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 29,811 0 0.00 575 -46.51 0.0003
2025-02-14 2024-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 29,811 -883,730 -96.74 1,074 -97.23 0.0005
2024-11-14 2024-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 913,541 -536,634 -37.00 38,743 -33.69 0.0198
2024-08-14 2024-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 1,450,175 -750,622 -34.11 58,429 -25.02 0.0313
2024-05-15 2024-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 2,200,797 -376,945 -14.62 77,930 2.20 0.0425
2024-02-14 2023-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 2,577,742 -93,489 -3.50 76,250 37.43 0.0455
2023-11-14 2023-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 2,671,231 586,832 28.15 55,482 8.47 0.0363
2023-08-14 2023-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 2,084,399 790,155 61.05 51,151 -2.68 0.0318
2023-05-15 2023-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 1,294,244 828,534 177.91 52,559 151.08 0.0347
2023-02-14 2022-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 465,710 6,993 1.52 20,934 -4.63 0.0150
2023-01-13 2022-09-30 13F/A-1 TANDEM DIABETES CARE COM NEW 875372203 458,717 147,416 47.35 21,949 19.12 0.0164
2022-11-14 2022-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 458,717 147,416 21,949 0.0164
2022-08-15 2022-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 311,301 -48,554 -13.49 18,426 -55.97 0.0127
2022-05-16 2022-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 359,855 -289,472 -44.58 41,849 -57.18 0.0202
2022-02-14 2021-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 649,327 -197,591 -23.33 97,738 -3.33 0.0408
2021-11-16 2021-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 846,918 15,756 1.90 101,105 24.89 0.0442
2021-08-16 2021-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 831,162 831,162 80,955 0.0346
2020-05-14 2020-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 0 -7,330 -100.00 0 -100.00
2020-02-18 2019-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 7,330 66 0.91 437 2.10 0.0002
2019-11-14 2019-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 7,264 -78 -1.06 428 -9.70 0.0002
2019-07-31 2019-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 7,342 -1,840 -20.04 474 -18.70 0.0003
2019-04-30 2019-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 9,182 3,473 60.83 583 168.66 0.0003
2019-02-06 2018-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 5,709 -1,266 -18.15 217 -27.42 0.0001
2018-11-09 2018-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 6,975 6,975 299 0.0002
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.