HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND - 30 Sep 2025 SCHEDULE 13G/A Report for Perimeter Acquisition Corp. I Class A ordinary shares, $0.0001 par value (PMTR)

Filing Manager: HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND
Reporting Manager: Healthcare of Ontario Pension Plan Trust Fund
Security: Perimeter Acquisition Corp. I Class A ordinary shares, $0.0001 par value
Symbol: PMTR
Shares outstanding: 25M shares
Disclosed Ownership: 1.25M shares
Ownership: 5%
Form type: SCHEDULE 13G/A
Filing time: 13 Nov 2025, 17:00:03 UTC
Date of event: 30 Sep 2025
Previous filing: 13 Aug 2025
SEC: View on sec.gov

Reporting Managers (1)

Name	Ownership	Shares Owned	sole voting power	shared voting power	Signature	Title	CIK
Healthcare of Ontario Pension Plan Trust Fund	5%	1.25M	1.25M	0	/s/ Abas Kanu	VP, HOOPP Compliance Officer