| | | | | | | | |
| Name | | Jurisdiction |
| Glatfelter Corporation (parent) | | U.S. (Pennsylvania) |
| Glatfelter Advanced Materials N.A., LLC | | U.S. (Delaware) |
| Glatfelter Caerphilly, Ltd. | | United Kingdom |
| Glatfelter Costa Rica, S.r.l. | | Costa Rica |
| Glatfelter Composite Fibers NA, Inc. | | U.S. (Delaware) |
| Glatfelter Dresden GmbH | | Germany |
| Glatfelter Falkenhagen GmbH | | Germany |
| Glatfelter Gatineau Ltèe | | Canada |
| Glatfelter Gernsbach GmbH | | Germany |
| Glatfelter Holdings, LLC | | U.S. (Delaware) |
| Glatfelter Ireland Limited | | Ireland |
| Glatfelter Italia SRL | | Italy |
| Glatfelter Luxembourg S.à.r.l. | | Luxembourg |
| Glatfelter Luxembourg Services S.à.r.l. | | Luxembourg |
| Glatfelter Lydney, Ltd. | | United Kingdom |
| Glatfelter Malta Limited | | Malta |
| Glatfelter Mt Holly LLC | | U.S. (Delaware) |
| Glatfelter Ober-Schmitten GmbH | | Germany |
| Glatfelter Russia LLC | | Russia |
| Glatfelter Scaër SAS | | France |
| Glatfelter Steinfurt GmbH | | Germany |
| Glatfelter Switzerland S.à.r.l | | Switzerland |
| Glatfelter Trade (Suzhou) Co., Ltd. | | China |
| Newtech Pulp, Inc. | | Philippines |
| PHG Tea Leaves, Inc. | | U.S. (Delaware) |
| PMM Holding (Luxembourg) AG | | Luxembourg |
| Jacob Holm & Sons AG | | Switzerland |
| Jacob Holm & Sonner Holding A/S | | Denmark |
| Jacob Holm & Sonner A/S | | Denmark |
| Jacob Holm Industries (America) Inc. | | U.S. (North Carolina) |
| Jacob Holm Industries (France) SAS | | France |
| Sontara Astrurias S.A.U. | | Spain |
| Sontara Japan G.K. | | Japan |
| Sontara Nonwovens (Shanghai) Co. Ltd. | | China |
| Sontara South Asia Sdn. Bhd. | | Malaysia |
| Sontara Korea Co. Ltd. | | Republic of Korea |
| Sontara AG | | Switzerland |