Sylvamo Corporation
MX ˙ BMV ˙ US8713321029
SecurityMX:SLVM / Sylvamo Corporation
InstitutionMariner, LLC
Latest Disclosed Ownership20,815 shares
Latest Disclosed Value $ 879,174
Mariner, LLC reports 73.42% decrease in ownership of SLVM / Sylvamo Corporation

On May 13, 2026 - Mariner, LLC filed a 13F-HR form disclosing ownership of 20,815 shares of Sylvamo Corporation (MX:SLVM) valued at $879,174 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 78,313 shares of Sylvamo Corporation. This represents a change in shares of -73.42% during the quarter.

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 SYLVAMO COMMON STOCK 871332102 20,815 -57,498 -73.42 879 -76.68 0.0008
2026-02-13 2025-12-31 13F SYLVAMO COMMON STOCK 871332102 78,313 40,336 106.21 3,771 124.54 0.0045
2025-11-14 2025-09-30 13F SYLVAMO COMMON STOCK 871332102 37,977 -3,407 -8.23 1,679 -19.01 0.0022
2025-08-14 2025-06-30 13F SYLVAMO COMMON STOCK 871332102 41,384 10,867 35.61 2,073 1.32 0.0030
2025-05-15 2025-03-31 13F SYLVAMO COMMON STOCK 871332102 30,517 -18,862 -38.20 2,047 -47.55 0.0034
2025-02-13 2024-12-31 13F SYLVAMO COMMON STOCK 871332102 49,379 2,098 4.44 3,902 -3.87 0.0066
2024-11-13 2024-09-30 13F SYLVAMO COMMON STOCK 871332102 47,281 11,755 33.09 4,059 66.52 0.0072
2024-08-13 2024-06-30 13F SYLVAMO COMMON STOCK 871332102 35,526 5,771 19.40 2,437 32.66 0.0047
2024-05-15 2024-03-31 13F SYLVAMO COMMON STOCK 871332102 29,755 8,332 38.89 1,837 74.62 0.0038
2024-02-14 2023-12-31 13F SYLVAMO COMMON STOCK 871332102 21,423 4,546 26.94 1,052 41.97 0.0025
2023-11-13 2023-09-30 13F SYLVAMO COMMON STOCK 871332102 16,877 16,877 742 0.0020
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.