Tandem Diabetes Care, Inc.
US ˙ NasdaqGM ˙ US8753722037

SecurityTNDM / Tandem Diabetes Care, Inc.
InstitutionMan Group plc
Latest Disclosed Ownership0 shares
Latest Disclosed Value $ 0
Man Group plc closes position in TNDM / Tandem Diabetes Care, Inc.

On May 15, 2026 - Man Group plc filed a 13F-HR form disclosing ownership of 0 shares of Tandem Diabetes Care, Inc. (US:TNDM) valued at $0 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 12,782 shares of Tandem Diabetes Care, Inc.. The current value of the position is $0 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)
2026-05-15 2026-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 0 -100.00 0
2026-02-17 2025-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 12,782 12,782 281 0.0003
2025-11-14 2025-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 0 -100.00 0
2025-08-14 2025-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 74,886 47,565 174.10 1,396 166.73 0.0027
2025-05-15 2025-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 27,321 27,321 523 0.0013
2024-11-14 2024-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 0 -121,245 -100.00 0 -100.00
2024-08-14 2024-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 121,245 100,116 473.83 4,885 552.94 0.0123
2024-05-15 2024-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 21,129 475 2.30 748 22.62 0.0019
2024-02-14 2023-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 20,654 20,654 611 0.0017
2023-11-14 2023-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 0 -191,923 -100.00 0 -100.00
2023-08-14 2023-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 191,923 4,710 212.89 0.0145
2023-05-15 2023-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 1,505 1.96 0.0054
2023-02-14 2022-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 32,842 13,429 69.18 1,476 58.88 0.0053
2022-11-14 2022-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 19,413 929 -82.34 0.0043
2022-08-15 2022-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 5,259 -60.29 0.0223
2022-05-16 2022-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 113,872 -45,534 -28.56 13,242 -44.81 0.0461
2022-02-14 2021-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 159,406 -91,540 -36.48 23,993 -19.91 0.0771
2021-11-15 2021-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 250,946 -29,621 -10.56 29,958 9.63 0.1051
2021-08-16 2021-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 280,567 207,352 283.21 27,327 322.95 0.0962
2021-05-17 2021-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 73,215 11,307 18.26 6,461 9.06 0.0284
2021-02-16 2020-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 61,908 12,081 24.25 5,924 4.74 0.0260
2020-11-16 2020-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 49,827 -18,715 -27.30 5,656 -16.58 0.0223
2020-08-14 2020-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 68,542 13,544 24.63 6,780 91.58 0.0342
2020-05-15 2020-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 54,998 14,700 36.48 3,539 47.34 0.0229
2020-02-18 2019-12-31 13F TANDEM DIABETES CARE COM NEW 875372203 40,298 -36,498 -47.53 2,402 -46.96 0.0079
2019-11-14 2019-09-30 13F TANDEM DIABETES CARE COM NEW 875372203 76,796 13,434 21.20 4,529 10.79 0.0168
2019-08-14 2019-06-30 13F TANDEM DIABETES CARE COM NEW 875372203 63,362 31,320 97.75 4,088 100.98 0.0148
2019-05-15 2019-03-31 13F TANDEM DIABETES CARE COM NEW 875372203 32,042 32,042 2,034 0.0077
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.