Pediatrix Medical Group, Inc.
US ˙ NYSE ˙ US58502B1061

SecurityMD / Pediatrix Medical Group, Inc.
InstitutionWinton Capital Group Ltd
Latest Disclosed Ownership52,703 shares
Latest Disclosed Value $ 1,127,317
Winton Capital Group Ltd reports 3.70% increase in ownership of MD / Pediatrix Medical Group, Inc.

On May 12, 2026 - Winton Capital Group Ltd filed a 13F-HR form disclosing ownership of 52,703 shares of Pediatrix Medical Group, Inc. (US:MD) valued at $1,127,317 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 11, 2026 disclosing 50,821 shares of Pediatrix Medical Group, Inc.. This represents a change in shares of 3.70% during the quarter. The current value of the position is $1,191,615 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)
2026-05-12 2026-03-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 52,703 1,882 3.70 1,127 3.68 0.0395
2026-02-11 2025-12-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 50,821 -164,275 -76.37 1,087 -69.82 0.0375
2025-11-13 2025-09-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 215,096 136,820 174.79 3,603 220.75 0.1349
2025-08-14 2025-06-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 78,276 -6,760 -7.95 1,123 -8.85 0.0574
2025-05-15 2025-03-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 85,036 -4,945 -5.50 1,232 4.41 0.0750
2025-02-12 2024-12-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 89,981 -18,705 -17.21 1,181 -6.27 0.0784
2024-11-12 2024-09-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 108,686 -21,805 -16.71 1,260 27.82 0.0883
2024-08-09 2024-06-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 130,491 33,057 33.93 985 0.82 0.0665
2024-05-14 2024-03-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 97,434 51,700 113.04 977 129.88 0.0690
2024-02-12 2023-12-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 45,734 15,089 49.24 425 9.25 0.0310
2023-11-13 2023-09-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 30,645 -643 -2.06 389 -12.39 0.0321
2023-08-14 2023-06-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 31,288 -7,729 -19.81 445 -23.58 0.0372
2023-05-12 2023-03-31 13F MEDNAX COM 58502B106 39,017 13,757 54.46 582 54.93 0.0355
2023-02-14 2022-12-31 13F MEDNAX COM 58502B106 25,260 9,380 59.07 375 43.13 0.0247
2022-11-10 2022-09-30 13F MEDNAX COM 58502B106 15,880 15,880 262 0.0171
2022-08-10 2022-06-30 13F MEDNAX COM 58502B106 0 -23,420 -100.00 0 -100.00
2022-05-11 2022-03-31 13F MEDNAX COM 58502B106 23,420 23,420 550 0.0289
2022-02-10 2021-12-31 13F MEDNAX COM 58502B106 0 -53,121 -100.00 0 -100.00
2021-10-28 2021-09-30 13F MEDNAX COM 58502B106 53,121 -57,250 -51.87 1,510 -54.63 0.0846
2021-08-10 2021-06-30 13F MEDNAX COM 58502B106 110,371 9,818 9.76 3,328 29.95 0.1787
2021-07-21 2021-03-31 13F MEDNAX COM 58502B106 100,553 22,493 28.82 2,561 33.66 0.1461
2021-02-12 2020-12-31 13F MEDNAX COM 58502B106 78,060 -94,176 -54.68 1,916 -31.67 0.1383
2020-10-30 2020-09-30 13F MEDNAX COM 58502B106 172,236 28,214 19.59 2,804 13.84 0.0911
2020-08-05 2020-06-30 13F MEDNAX COM 58502B106 144,022 -36,626 -20.27 2,463 17.12 0.0636
2020-05-11 2020-03-31 13F MEDNAX COM 58502B106 180,648 23,083 14.65 2,103 -51.98 0.0555
2020-02-13 2019-12-31 13F MEDNAX COM 58502B106 157,565 -668,048 -80.92 4,379 -76.55 0.0615
2019-11-08 2019-09-30 13F MEDNAX COM 58502B106 825,613 23,201 2.89 18,675 -7.76 0.2208
2019-07-08 2019-06-30 13F MEDNAX COM 58502B106 802,412 355,681 79.62 20,245 66.79 0.3935
2019-05-13 2019-03-31 13F MEDNAX COM 58502B106 446,731 16,267 3.78 12,138 -14.55 0.2441
2019-02-05 2018-12-31 13F MEDNAX COM 58502B106 430,464 384,944 845.66 14,205 568.79 0.3061
2018-11-02 2018-09-30 13F MEDNAX COM 58502B106 45,520 45,520 2,124 0.0445
2015-05-12 2015-03-31 13F MEDNAX COM 58502B106 0 -14,018 -100.00 0 -100.00
2015-03-16 2014-12-31 13F/A-1 MEDNAX COM 58502B106 14,018 -31,874 -69.45 927 -63.16 0.0115
2015-02-13 2014-12-31 13F MEDNAX COM 58502B106 15,460 1,022
2014-10-28 2014-09-30 13F MEDNAX COM 58502B106 45,892 3,439 8.10 2,516 1.90 0.0180
2014-08-05 2014-06-30 13F MEDNAX COM 58502B106 42,453 42,453 2,469 0.0168
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.