Nature of Operations and Basis of Presentation	3 Months Ended
Mar. 28, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Operations and Basis of Presentation	1. Nature of Operations and Basis of Presentation Nature of Operations RYAM is a global leader of high purity cellulose commonly used in the production of filters, food, pharmaceuticals, high performance plastics, propellants and various other industrial applications. The Company’s specialized assets, capable of creating the world’s leading cellulose specialties products, are also used to produce cellulose viscose pulp, cellulose fluff pulp, paperboard, high yield pulp and various value-added co-products, including biofuels, bioelectricity and lignin. Basis of Presentation The Financial Statements and notes thereto have been prepared in accordance with GAAP for interim financial information and in accordance with the rules and regulations of the SEC. In the opinion of management, the Financial Statements and notes reflect all adjustments, including all normal recurring adjustments, necessary for a fair presentation of the results of operations, financial position and cash flows for the periods presented. The December 31, 2025 consolidated balance sheet was derived from audited annual financial statements but does not contain all the footnote disclosures from the audited annual financial statements. These Financial Statements and notes should be read in conjunction with the consolidated financial statements and supplementary data included in the Company’s 2025 Form 10-K. Certain amounts in prior periods have been reclassified to conform with the current period presentation. New Segment Structure Beginning in January 2026, the Company reorganized its segment structure and now operates in two segments: •High Purity Cellulose: formerly the segments of Cellulose Specialties, Cellulose Commodities and Biomaterials •Paperboard & High Yield Pulp: formerly the segments of Paperboard and High Yield Pulp Prior period segment results have been recast to align with this new segment reporting structure. See Note 15—Segments for further information. Subsequent Events In April 2026, an isolated fire occurred on the B production line of the Company’s HPC plant in Jesup, Georgia during its scheduled annual maintenance outage. There were no injuries to employees or contractors and no impact on the surrounding community. Production lines A and C resumed operations as scheduled following the maintenance outage and the B line resumed operations within one week of the fire. The total impact of the fire is estimated at under $5 million.

Nature of Operations and Basis of Presentation

3 Months Ended

Mar. 28, 2026

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Nature of Operations and Basis of Presentation

1. Nature of Operations and Basis of Presentation

Nature of Operations

RYAM is a global leader of high purity cellulose commonly used in the production of filters, food, pharmaceuticals, high performance plastics, propellants and various other industrial applications. The Company’s specialized assets, capable of creating the world’s leading cellulose specialties products, are also used to produce cellulose viscose pulp, cellulose fluff pulp, paperboard, high yield pulp and various value-added co-products, including biofuels, bioelectricity and lignin.

Basis of Presentation

The Financial Statements and notes thereto have been prepared in accordance with GAAP for interim financial information and in accordance with the rules and regulations of the SEC. In the opinion of management, the Financial Statements and notes reflect all adjustments, including all normal recurring adjustments, necessary for a fair presentation of the results of operations, financial position and cash flows for the periods presented. The December 31, 2025 consolidated balance sheet was derived from audited annual financial statements but does not contain all the footnote disclosures from the audited annual financial statements. These Financial Statements and notes should be read in conjunction with the consolidated financial statements and supplementary data included in the Company’s 2025 Form 10-K. Certain amounts in prior periods have been reclassified to conform with the current period presentation.

New Segment Structure

Beginning in January 2026, the Company reorganized its segment structure and now operates in two segments:

•High Purity Cellulose: formerly the segments of Cellulose Specialties, Cellulose Commodities and Biomaterials

•Paperboard & High Yield Pulp: formerly the segments of Paperboard and High Yield Pulp

Prior period segment results have been recast to align with this new segment reporting structure. See Note 15—Segments for further information.

Subsequent Events

In April 2026, an isolated fire occurred on the B production line of the Company’s HPC plant in Jesup, Georgia during its scheduled annual maintenance outage. There were no injuries to employees or contractors and no impact on the surrounding community. Production lines A and C resumed operations as scheduled following the maintenance outage and the B line resumed operations within one week of the fire. The total impact of the fire is estimated at under $5 million.