Pediatrix Medical Group, Inc.
US ˙ NYSE ˙ US58502B1061

SecurityMD / Pediatrix Medical Group, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership34,264 shares
Latest Disclosed Value $ 732,736
Janus Henderson Group Plc ownership in MD / Pediatrix Medical Group, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 34,264 shares of Pediatrix Medical Group, Inc. (US:MD) valued at $732,907 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 34,264 shares of Pediatrix Medical Group, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $748,326 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)
2026-05-18 2026-03-31 13F/A-1 PEDIATRIX MEDICAL GROUP COM 58502B106 34,264 0 0.00 733 0.00 0.0001
2026-05-15 2026-03-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,264 0 733 0.0001
2026-02-17 2025-12-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,264 0 0.00 733 27.53 0.0003
2025-11-14 2025-09-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,264 0 0.00 574 16.90 0.0003
2025-08-14 2025-06-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,264 0 0.00 492 1.24 0.0002
2025-05-15 2025-03-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,264 0 0.00 485 8.02 0.0003
2025-02-14 2024-12-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,264 0 0.00 449 13.10 0.0002
2024-11-14 2024-09-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,264 0 0.00 397 53.88 0.0002
2024-08-14 2024-06-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,264 -429 -1.24 258 -25.65 0.0001
2024-05-15 2024-03-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,693 6 0.02 348 7.76 0.0002
2024-02-14 2023-12-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,687 -64 -0.18 322 -26.98 0.0002
2023-11-14 2023-09-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,751 5 0.01 442 -10.73 0.0003
2023-08-14 2023-06-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,746 -41 -0.12 494 -4.63 0.0003
2023-05-15 2023-03-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 34,787 19,078 121.45 518 122.32 0.0003
2023-02-14 2022-12-31 13F PEDIATRIX MEDICAL GROUP COM 58502B106 15,709 0 0.00 234 -10.38 0.0002
2023-01-13 2022-09-30 13F/A-1 PEDIATRIX MEDICAL GROUP COM 58502B106 15,709 27 0.17 260 -21.21 0.0002
2022-11-14 2022-09-30 13F PEDIATRIX MEDICAL GROUP COM 58502B106 15,709 27 260 0.0002
2022-08-15 2022-06-30 13F MEDNAX COM 58502B106 15,682 -16 -0.10 330 -10.57 0.0002
2022-05-16 2022-03-31 13F MEDNAX COM 58502B106 15,698 6 0.04 369 -13.58 0.0002
2022-02-14 2021-12-31 13F MEDNAX COM 58502B106 15,692 7,899 101.36 427 93.21 0.0002
2021-11-16 2021-09-30 13F MEDNAX COM 58502B106 7,793 7,793 221 0.0001
2019-02-06 2018-12-31 13F MEDNAX COM 58502B106 0 -313,859 -100.00 0 -100.00
2018-11-09 2018-09-30 13F MEDNAX COM 58502B106 313,859 -2,967 -0.94 14,646 6.80 0.0078
2018-08-10 2018-06-30 13F MEDNAX COM 58502B106 316,826 1,300 0.41 13,714 -21.84 0.0078
2018-05-14 2018-03-31 13F MEDNAX COM 58502B106 315,526 114,031 56.59 17,545 62.95 0.0103
2018-03-12 2017-12-31 13F/A-1 MEDNAX COM 58502B106 201,495 -13,728 -6.38 10,767 16.04 0.0066
2018-02-09 2017-12-31 13F MEDNAX COM 58502B106 201,495 -13,728 10,767
2017-11-14 2017-09-30 13F MEDNAX COM 58502B106 215,223 4,612 2.19 9,279 -27.02 0.0059
2017-08-17 2017-06-30 13F/A-1 MEDNAX COM 58502B106 210,611 -444,403 -67.85 12,714 -72.02 0.0087
2017-08-14 2017-06-30 13F MEDNAX COM 58502B106 210,611 -444,403 12,714
2017-05-03 2017-03-31 13F MEDNAX COM 58502B106 655,014 -8,001 -1.21 45,435 2.78 0.3190
2017-01-30 2016-12-31 13F MEDNAX COM 58502B106 663,015 1,363 0.21 44,207 0.87 0.3260
2016-10-24 2016-09-30 13F MEDNAX COM 58502B106 661,652 19,272 3.00 43,825 -5.79 0.3230
2016-07-29 2016-06-30 13F MEDNAX COM 58502B106 642,380 17,244 2.76 46,518 15.18 0.3868
2016-05-12 2016-03-31 13F MEDNAX COM 58502B106 625,136 42,239 7.25 40,387 -3.27 0.3276
2016-02-03 2015-12-31 13F MEDNAX COM 58502B106 582,897 38,826 7.14 41,753 -0.07 0.3350
2015-11-16 2015-09-30 13F MEDNAX COM 58502B106 544,071 48,210 9.72 41,782 13.68 0.3680
2015-08-17 2015-06-30 13F MEDNAX COM 58502B106 495,861 28,464 6.09 36,753 8.44 0.2888
2015-06-02 2015-03-31 13F/A-1 MEDNAX COM 58502B106 467,397 198,843 74.04 33,893 90.85 0.2615
2015-05-15 2015-03-31 13F MEDNAX COM 58502B106 467,397 33,893
2015-02-12 2014-12-31 13F MEDNAX COM 58502B106 268,554 -10,279 -3.69 17,759 16.23 0.1280
2014-11-12 2014-09-30 13F MEDNAX COM 58502B106 278,833 1,301 0.47 15,279 -5.32 0.1437
2014-08-13 2014-06-30 13F MEDNAX COM 58502B106 277,532 -104,442 -27.34 16,137 -31.85 0.1507
2014-05-08 2014-03-31 13F MEDNAX COM 58502B106 381,974 -109,314 -22.25 23,679 -9.69 0.2305
2014-01-14 2013-12-31 13F MEDNAX COM 58502B106 491,288 245,644 100.00 26,220 6.34 0.2649
2013-11-12 2013-09-30 13F MEDNAX COM 58502B106 245,644 -258 -0.10 24,657 8.79 0.2720
2013-08-15 2013-06-30 13F MEDNAX COM 58502B106 245,902 245,902 22,664 0.2650
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.