Curbline Properties Corp. filed an 8-K on August 18, 2026, reporting that an ownership threshold reduction by board member Alexander Otto's family triggered an automatic increase in the company's stock ownership limit and terminated a related waiver agreement, effective August 12, 2026.

Key Highlights

  • Ownership limit raised: The Charter's Ownership Limit increased to 9.8% of outstanding common stock for all holders, up from 8%, effective August 12, 2026.
  • Triggering event: The board determined that Alexander Otto, a director, his family, and related persons collectively held 7.5% or less of the company's outstanding common stock, constituting the "Exempt Holder Reduction Event."
  • Waiver Agreement terminated: The Waiver Agreement between the company and Mr. Otto, originally entered into on October 1, 2024, automatically terminated in accordance with its terms.
  • Prior limit for general holders: Before the triggering event, no person other than the Exempt Holder could own more than 8% of the company's outstanding common stock.
  • Related Party Limit waiver ended: The termination of the Waiver Agreement also ended the waiver that had permitted the Exempt Holder to constructively own more than 9.8% of outstanding common stock.
  • State filing made: The company filed a Certificate of Notice with the Maryland State Department of Assessments and Taxation reflecting the ownership limit change.

Curbline Properties Charter Ownership Limit Automatically Resets After Otto Family Stake Reduction

According to the filing, the board of directors of Curbline Properties Corp. (NYSE:CURB) determined on August 12, 2026, that the beneficial ownership of director Alexander Otto, his family, and other persons deemed to have constructive ownership of common stock held by the Otto family had fallen to 7.5% or less of the company's outstanding common stock. The filing refers to this group collectively as the "Exempt Holder" and to this event as the "Exempt Holder Reduction Event."

As a result of the Exempt Holder Reduction Event, the company disclosed two automatic consequences under the terms of its Charter. First, the Ownership Limit applicable to all holders increased from 8% to 9.8% of the company's outstanding common stock. Second, the Waiver Agreement between the company and Mr. Otto terminated automatically in accordance with its terms. That agreement had been entered into on October 1, 2024, in connection with what the filing describes as "the spin-off of the Company from SITE Centers Corp." The Waiver Agreement had waived the Related Party Limit in the Charter that would otherwise have prohibited the Exempt Holder from constructively owning more than 9.8% of outstanding common stock.

The company reported that it filed a Certificate of Notice with the State Department of Assessments and Taxation of Maryland to reflect the Exempt Holder Reduction Event and the resulting ownership limit increase. The filing notes that the summary of the Certificate of Notice "does not purport to be complete" and directs readers to Exhibit 3.1, which is incorporated by reference. The 8-K was signed by Lesley H. Solomon, Executive Vice President, General Counsel and Secretary.

What Was Disclosed

Curbline Properties disclosed that a reduction in the Otto family's stock ownership below 7.5% triggered an automatic Charter provision raising the general ownership limit to 9.8% for all holders and terminating a pre-existing waiver agreement originally tied to the company's 2024 spin-off from SITE Centers Corp.