Post Holdings, Inc.
US ˙ NYSE ˙ US7374461041

SecurityPOST / Post Holdings, Inc.
InstitutionNatixis Advisors, L.p.
Latest Disclosed Ownership204,240 shares
Latest Disclosed Value $ 20,191
Natixis Advisors, L.p. reports 22.40% increase in ownership of POST / Post Holdings, Inc.

On May 13, 2026 - Natixis Advisors, L.p. filed a 13F-HR form disclosing ownership of 204,240 shares of Post Holdings, Inc. (US:POST) valued at $20,191,166 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 10, 2026 disclosing 166,860 shares of Post Holdings, Inc.. This represents a change in shares of 22.40% during the quarter. The current value of the position is $18,585,840 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)
2026-05-13 2026-03-31 13F POST HLDGS COM 737446104 204,240 37,380 22.40 20 25.00 0.0281
2026-02-10 2025-12-31 13F POST HLDGS COM 737446104 166,860 -10,179 -5.75 17 -15.79 0.0234
2025-11-13 2025-09-30 13F POST HLDGS INC COM 737446104 177,039 20,099 12.81 19 11.76 0.0278
2025-08-13 2025-06-30 13F POST HLDGS COM 737446104 156,940 -8,941 -5.39 17 -10.53 0.0271
2025-05-08 2025-03-31 13F POST HLDGS COM 737446104 165,881 17,609 11.88 19 18.75 0.0357
2025-02-10 2024-12-31 13F POST HLDGS COM 737446104 148,272 6,505 4.59 17 0.00 0.0317
2024-11-06 2024-09-30 13F POST HOLDINGS COM 737446104 141,767 17,229 13.83 16 33.33 0.0320
2024-08-01 2024-06-30 13F POST HOLDINGS COM 737446104 124,538 50,324 67.81 13 71.43 0.0282
2024-04-25 2024-03-31 13F POST HOLDINGS COM 737446104 74,214 50,210 209.17 8 250.00 0.0181
2024-02-06 2023-12-31 13F POST HOLDINGS COM 737446104 24,004 -19,165 -44.40 2 -33.33 0.0056
2023-11-13 2023-09-30 13F POST HOLDINGS COM 737446104 43,169 24,772 134.65 4 200.00 0.0113
2023-08-15 2023-06-30 13F POST HOLDINGS COM 737446104 18,397 -423 -2.25 2 0.00 0.0049
2023-05-11 2023-03-31 13F POST HOLDINGS COM 737446104 18,820 90 0.48 2 0.00 0.0058
2023-01-27 2022-12-31 13F POST HOLDINGS COM 737446104 18,730 -66 -0.35 2 -99.94 0.0064
2022-11-14 2022-09-30 13F POST HOLDINGS COM 737446104 18,796 -13,548 -41.89 1,540 -42.19 0.0065
2022-08-12 2022-06-30 13F POST HOLDINGS COM 737446104 32,344 10,002 44.77 2,664 72.20 0.0117
2022-05-12 2022-03-31 13F POST HOLDINGS COM 737446104 22,342 -16,002 -41.73 1,547 -64.21 0.0059
2022-02-08 2021-12-31 13F POST HOLDINGS COM 737446104 38,344 -2,922 -7.08 4,323 -4.91 0.0165
2021-11-15 2021-09-30 13F POST HOLDINGS COM 737446104 41,266 -2,930 -6.63 4,546 -5.17 0.0187
2021-08-12 2021-06-30 13F POST HLDGS COM 737446104 44,196 -762 -1.69 4,794 0.91 0.0224
2021-05-05 2021-03-31 13F POST HLDGS COM 737446104 44,958 -1,047 -2.28 4,751 2.24 0.0248
2021-02-12 2020-12-31 13F POST HLDGS COM 737446104 46,005 -17,474 -27.53 4,647 -14.87 0.0268
2020-11-12 2020-09-30 13F POST HOLDINGS COM 737446104 63,479 6,637 11.68 5,459 9.60 0.0344
2020-08-11 2020-06-30 13F POST HOLDINGS COM 737446104 56,842 6,807 13.60 4,981 19.97 0.0331
2020-04-27 2020-03-31 13F POST HOLDINGS COM 737446104 50,035 -904 -1.77 4,152 -25.28 0.0338
2020-02-10 2019-12-31 13F POST HOLDINGS COM 737446104 50,939 -1,011 -1.95 5,557 1.07 0.0392
2019-11-12 2019-09-30 13F POST HOLDINGS COM 737446104 51,950 -1,812 -3.37 5,498 -1.63 0.0436
2019-08-12 2019-06-30 13F POST HOLDINGS COM 737446104 53,762 2,025 3.91 5,589 -1.24 0.0456
2019-05-15 2019-03-31 13F/A-1 POST HOLDINGS COM 737446104 51,737 -505 -0.97 5,659 21.54 0.0495
2019-05-15 2019-03-31 13F POST HOLDINGS COM 737446104 51,737 -505 5,659
2019-02-13 2018-12-31 13F/A-1 POST HOLDINGS COM 737446104 52,242 14,914 39.95 4,656 27.25 0.0460
2019-02-13 2018-12-31 13F POST HOLDINGS COM 737446104 52,242 14,914 4,656
2018-11-13 2018-09-30 13F POST HOLDINGS COM 737446104 37,328 464 1.26 3,659 15.39 0.0322
2018-08-14 2018-06-30 13F/A-1 POST HOLDINGS COM 737446104 36,864 -10,080 -21.47 3,171 -10.83 0.0303
2018-08-14 2018-06-30 13F POST HOLDINGS COM 737446104 36,864 3,171
2018-05-10 2018-03-31 13F POST HOLDINGS COM 737446104 46,944 29,254 165.37 3,556 153.82 0.0351
2018-02-14 2017-12-31 13F POST HLDGS COM 737446104 17,690 -31,996 -64.40 1,401 -68.05 0.0143
2017-11-14 2017-09-30 13F POST HLDGS COM 737446104 49,686 301 0.61 4,385 14.34 0.0463
2017-07-27 2017-06-30 13F POST HOLDINGS COM 737446104 49,385 6,252 14.49 3,835 1.59 0.0415
2017-05-12 2017-03-31 13F POST HOLDINGS COM 737446104 43,133 -2,885 -6.27 3,775 2.05 0.0418
2017-02-07 2016-12-31 13F POST HOLDINGS COM 737446104 46,018 -2,868 -5.87 3,699 -1.96 0.0445
2016-11-04 2016-09-30 13F POST HOLDINGS COM 737446104 48,886 -4,614 -8.62 3,773 -14.72 0.0489
2016-08-01 2016-06-30 13F POST HLDGS COM 737446104 53,500 -1,165 -2.13 4,424 17.66 0.0612
2016-05-06 2016-03-31 13F POST HLDGS COM 737446104 54,665 25,491 87.38 3,760 108.89 0.0563
2016-02-12 2015-12-31 13F POST HLDGS COM 737446104 29,174 29,174 1,800 0.0295
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.