---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-21-140373"
form_type: "8-K"
ticker: "CDP"
cik: "0000860546"
company_name: "COPT DEFENSE PROPERTIES"
filed_at: "2021-11-17T23:59:59+00:00"
generated_at: "2026-06-28T07:34:59.576849+00:00"
event_type: "debt"
sentiment: "neutral"
materiality_score: 0.6
calibrated_materiality_score: 0.6
confidence: "high"
source: SEC EDGAR
---

# COPT's operating partnership issues $400M of 2.900% Senior Notes due 2033

## Summary
- Issuer: Corporate Office Properties, L.P. (COPLP); fully guaranteed by COPT (OFC).
- $400M aggregate principal amount, 2.900% coupon, maturity in 2033.
- Offered via effective shelf registration statement; prospectus supplement dated Nov 2, 2021.
- Notes governed by Fourth Supplemental Indenture dated Nov 17, 2021.

## SEC filing metadata
- accession: 0001104659-21-140373
- form_type: 8-K
- ticker: CDP
- cik: 0000860546
- company_name: COPT DEFENSE PROPERTIES
- filed_at: 2021-11-17T23:59:59+00:00
- event_type: debt
- sentiment: neutral
- materiality_score: 0.6
- calibrated_materiality_score: 0.6
- confidence: high
- sec_items: 1.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/860546/000110465921140373/0001104659-21-140373-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/860546/000110465921140373/tm2133046d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-21-140373
- JSON: https://secwatch.observer/filing/0001104659-21-140373.json
- Plain text: https://secwatch.observer/filing/0001104659-21-140373.txt

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.