---
schema_version: "secwatch.filing_event.v1"
accession: "0000912593-25-000284"
form_type: "8-K"
ticker: "SUI"
cik: "0000912593"
company_name: "SUN COMMUNITIES INC"
filed_at: "2025-12-16T23:59:59+00:00"
generated_at: "2026-05-16T13:08:57.668429+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.55
confidence: "high"
source: SEC EDGAR
---

# Sun Communities appoints Mark E. Patten as CFO, effective Jan 5, 2026; Castro-Caratini to advise

## Summary
- Mark E. Patten appointed CFO, EVP, Secretary and Treasurer, starting Jan 5, 2026.
- Patten receives $600k base salary, $3.5M retention equity (4-yr vest), and $2.3M cash bonus.
- Outgoing CFO Castro-Caratini will serve as Senior Adviser through June 30, 2026 at $45,833/mo; 50,200 restricted shares vest.
- Former CEO Gary Shiffman transition agreement provides $75k/mo through Mar 31, 2026; all 118,000 unvested shares vest Jan 2, 2026.
- Patten previously CFO of Essential Properties Realty Trust (EPRT), CTO Realty Growth, and Alpine Income Property Trust.

## SEC filing metadata
- accession: 0000912593-25-000284
- form_type: 8-K
- ticker: SUI
- cik: 0000912593
- company_name: SUN COMMUNITIES INC
- filed_at: 2025-12-16T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.55
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/912593/000091259325000284/0000912593-25-000284-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/912593/000091259325000284/sui-20251211.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000912593-25-000284
- JSON: https://secwatch.observer/filing/0000912593-25-000284.json
- Plain text: https://secwatch.observer/filing/0000912593-25-000284.txt

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