---
schema_version: "secwatch.filing_event.v1"
accession: "0001193125-26-355420"
form_type: "8-K"
ticker: "CURB"
cik: "0002027317"
company_name: "Curbline Properties Corp."
filed_at: "2026-08-18T20:06:36+00:00"
generated_at: "2026-08-18T20:08:05.939968+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Curbline raises ownership limit to 9.8% after Otto stake falls below 7.5%

## Summary
- Effective Aug 12, 2026, Alexander Otto's beneficial ownership fell to 7.5% or less, triggering the Exempt Holder Reduction Event.
- Ownership Limit in Charter increased from 8% to 9.8% for all holders; Certificate of Notice filed with Maryland SDAT.
- Waiver Agreement with Otto (dated Oct 1, 2024) automatically terminated, ending the Related Party Limit waiver for the Exempt Holder.
- Exhibit 3.1 contains the Certificate of Notice; no financial impact disclosed.

## SEC filing metadata
- accession: 0001193125-26-355420
- form_type: 8-K
- ticker: CURB
- cik: 0002027317
- company_name: Curbline Properties Corp.
- filed_at: 2026-08-18T20:06:36+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 1.02, 3.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/2027317/000119312526355420/0001193125-26-355420-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/2027317/000119312526355420/d110992d8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001193125-26-355420
- JSON: https://secwatch.observer/filing/0001193125-26-355420.json
- Plain text: https://secwatch.observer/filing/0001193125-26-355420.txt

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