FRONTIER CAPITAL MANAGEMENT CO LLC - 30 Jun 2025 SCHEDULE 13G Report for Sun Country Airlines Holdings, Inc. Common Stock, par value $0.01 per share (SNCY)

Filing Manager: FRONTIER CAPITAL MANAGEMENT CO LLC
Reporting Manager: FRONTIER CAPITAL MANAGEMENT CO.,LLC
Security: Sun Country Airlines Holdings, Inc. Common Stock, par value $0.01 per share
Symbol: SNCY
Shares outstanding: 53.2M shares
Disclosed Ownership: 3.53M shares
Ownership: 6.64%
Form type: SCHEDULE 13G
Filing time: 14 Aug 2025, 09:23:01 UTC
Date of event: 30 Jun 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
FRONTIER CAPITAL MANAGEMENT CO.,LLC	6.64%	3.53M	0	1.63M	Robert E. Phay	Robert E. Phay, Chief Compliance Officer & General Counsel