SCHEDULE 13D/A

ROGERS CORP

Capital Stock, par value $1.00 per share · CUSIP: 775133101

Event date: 2026-01-21

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Starboard Value LPReported CIK 0001517137

  Shares: 599,328.00 · Class: 3.3%

• STARBOARD VALUE & OPPORTUNITY MASTER FUND LTDReported CIK 0001373638

  Shares: 317,714.00 · Class: 1.8%

• STARBOARD VALUE & OPPORTUNITY S LLCReported CIK 0001519812

  Shares: 35,901.00 · Class: 0.2%

• Starboard Value & Opportunity Master Fund L LPReported CIK 0001767736

  Shares: 20,710.00 · Class: 0.1%

• Starboard Value L LPReported CIK 0001767773

  Shares: 20,710.00 · Class: 0.1%

• Starboard Value R GP LLCReported CIK 0001575979

  Shares: 20,710.00 · Class: 0.1%

• Starboard X Master Fund LtdReported CIK 0001833016

  Shares: 128,595.00 · Class: 0.7%

• Starboard Value GP LLCReported CIK 0001517138

  Shares: 599,328.00 · Class: 3.3%

• Starboard Principal Co LPReported CIK 0001517139

  Shares: 599,328.00 · Class: 3.3%

• Starboard Principal Co GP LLCReported CIK 0001517140

  Shares: 599,328.00 · Class: 3.3%

• Smith Jeffrey CReported CIK 0001362697

  Shares: 599,328.00 · Class: 3.3%

• Feld Peter AReported CIK 0001410600

  Shares: 599,328.00 · Class: 3.3%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.