Post Holdings, Inc.
US ˙ NYSE ˙ US7374461041

SecurityPOST / Post Holdings, Inc.
InstitutionJanus Henderson Group Plc
Latest Disclosed Ownership20,019 shares
Latest Disclosed Value $ 1,980,179
Janus Henderson Group Plc ownership in POST / Post Holdings, Inc.

On May 18, 2026 - Janus Henderson Group Plc filed a 13F-HR/A form disclosing ownership of 20,019 shares of Post Holdings, Inc. (US:POST) valued at $1,979,078 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 20,019 shares of Post Holdings, Inc.. This represents a change in shares of 0.00% during the quarter. The current value of the position is $1,821,729 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 POST HLDGS COM 737446104 20,019 0 0.00 1,980 -0.10 0.0003
2026-05-15 2026-03-31 13F POST HLDGS COM 737446104 20,019 0 1,980 0.0004
2026-02-17 2025-12-31 13F POST HLDGS COM 737446104 20,019 0 0.00 1,983 -7.86 0.0009
2025-11-14 2025-09-30 13F POST HLDGS COM 737446104 20,019 0 0.00 2,152 -1.38 0.0010
2025-08-14 2025-06-30 13F POST HLDGS COM 737446104 20,019 0 0.00 2,182 -5.30 0.0011
2025-05-15 2025-03-31 13F POST HLDGS COM 737446104 20,019 -2,300 -10.31 2,303 -9.90 0.0013
2025-02-14 2024-12-31 13F POST HLDGS COM 737446104 22,319 -1,300 -5.50 2,556 -6.48 0.0013
2024-11-14 2024-09-30 13F POST HLDGS COM 737446104 23,619 1,827 8.38 2,733 20.40 0.0014
2024-08-14 2024-06-30 13F POST HLDGS COM 737446104 21,792 -3,855 -15.03 2,271 -16.70 0.0012
2024-05-15 2024-03-31 13F POST HLDGS COM 737446104 25,647 -8 -0.03 2,726 20.63 0.0015
2024-02-14 2023-12-31 13F POST HLDGS COM 737446104 25,655 -2,939 -10.28 2,260 -7.87 0.0013
2023-11-14 2023-09-30 13F POST HLDGS COM 737446104 28,594 4,964 21.01 2,453 19.84 0.0016
2023-08-14 2023-06-30 13F POST HLDGS COM 737446104 23,630 -2 -0.01 2,047 -3.63 0.0013
2023-05-15 2023-03-31 13F POST HLDGS COM 737446104 23,632 12,855 119.28 2,124 118.42 0.0014
2023-02-14 2022-12-31 13F POST HLDGS COM 737446104 10,777 2,667 32.89 972 46.17 0.0007
2022-11-14 2022-09-30 13F POST HLDGS COM 737446104 8,110 -2,489 -23.48 665 -23.83 0.0005
2022-08-15 2022-06-30 13F POST HLDGS COM 737446104 10,599 -18,117 -63.09 873 -56.11 0.0006
2022-05-16 2022-03-31 13F POST HLDGS COM 737446104 28,716 18,116 170.91 1,989 66.44 0.0010
2022-02-14 2021-12-31 13F POST HLDGS COM 737446104 10,600 -53,437 -83.45 1,195 -83.06 0.0005
2021-11-16 2021-09-30 13F POST HLDGS COM 737446104 64,037 64,037 7,055 0.0031
2021-08-16 2021-06-30 13F POST HLDGS COM 737446104 0 -28,816 -100.00 0 -100.00
2021-05-17 2021-03-31 13F POST HLDGS COM 737446104 28,816 28,816 3,046 0.0014
2020-05-14 2020-03-31 13F POST HLDGS COM 737446104 0 -50,169 -100.00 0 -100.00
2020-02-18 2019-12-31 13F POST HLDGS COM 737446104 50,169 -14,711 -22.67 5,473 -20.30 0.0028
2019-11-14 2019-09-30 13F POST HLDGS COM 737446104 64,880 -41,360 -38.93 6,867 -37.83 0.0037
2019-07-31 2019-06-30 13F POST HLDGS COM 737446104 106,240 -8,504 -7.41 11,046 -12.01 0.0060
2019-04-30 2019-03-31 13F POST HLDGS COM 737446104 114,744 100,311 695.01 12,553 876.13 0.0070
2019-02-06 2018-12-31 13F POST HLDGS COM 737446104 14,433 -155,856 -91.52 1,286 -92.29 0.0008
2018-11-09 2018-09-30 13F POST HLDGS COM 737446104 170,289 32,929 23.97 16,686 41.22 0.0089
2018-08-10 2018-06-30 13F POST HLDGS COM 737446104 137,360 5,070 3.83 11,816 17.90 0.0067
2018-05-14 2018-03-31 13F POST HLDGS COM 737446104 132,290 61,150 85.96 10,022 77.82 0.0059
2018-03-12 2017-12-31 13F/A-1 POST HLDGS COM 737446104 71,140 67,540 1,876.11 5,636 1,672.33 0.0035
2018-02-09 2017-12-31 13F POST HLDGS COM 737446104 71,140 67,540 5,636
2017-11-14 2017-09-30 13F POST HLDGS COM 737446104 3,600 900 33.33 318 51.43 0.0002
2017-08-17 2017-06-30 13F/A-1 POST HLDGS COM 737446104 2,700 -83,000 -96.85 210 -95.55 0.0001
2017-08-14 2017-06-30 13F POST HLDGS COM 737446104 2,700 210
2014-05-08 2014-03-31 13F POST HLDGS COM 737446104 85,700 85,700 4,724 0.0460
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.