SCHEDULE 13D/A

ALGONQUIN PWR UTILS CORP

Common Shares, no par value · CUSIP: 015857105

Event date: 2025-03-13

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: 66,433,000.00 · Class: 8.7%

• Starboard Value and Opportunity Master Fund III LP

  Shares: 32,248,050.00 · Class: 4.2%

• Starboard Value and Opportunity S LLCReported CIK 0001519812

  Shares: 3,806,900.00 · Class: 0.5%

• Starboard Value and Opportunity C LPReported CIK 0001571704

  Shares: 2,943,580.00 · Class: 0.4%

• Starboard X Master Fund II LP

  Shares: 9,352,651.00 · Class: 1.2%

• Starboard Value R LPReported CIK 0001575972

  Shares: 12,296,231.00 · Class: 1.6%

• Starboard Value and Opportunity Master Fund L LPReported CIK 0001767736

  Shares: 1,658,475.00 · Class: 0.2%

• Starboard Value L LPReported CIK 0001767773

  Shares: 1,658,475.00 · Class: 0.2%

• Starboard Value R GP LLCReported CIK 0001575979

  Shares: 13,954,706.00 · Class: 1.8%

• Starboard G Fund, L.P.

  Shares: 10,182,795.00 · Class: 1.3%

• Starboard Value G GP, LLC

  Shares: 10,182,795.00 · Class: 1.3%

• Starboard Value A LPReported CIK 0001575998

  Shares: 42,430,845.00 · Class: 5.5%

• Starboard Value A GP LLCReported CIK 0001575974

  Shares: 42,430,845.00 · Class: 5.5%

• Starboard Value GP LLCReported CIK 0001517138

  Shares: 66,433,000.00 · Class: 8.7%

• Starboard Principal Co LPReported CIK 0001517139

  Shares: 66,433,000.00 · Class: 8.7%

• Starboard Principal Co GP LLCReported CIK 0001517140

  Shares: 66,433,000.00 · Class: 8.7%

• Smith Jeffrey CReported CIK 0001362697

  Shares: 66,433,000.00 · Class: 8.7%

• Feld Peter AReported CIK 0001410600

  Shares: 66,433,000.00 · Class: 8.7%

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