---
schema_version: "secwatch.filing_event.v1"
accession: "0001213900-22-042318"
form_type: "8-K"
ticker: "FISN"
cik: "0001918102"
company_name: "DEEP FISSION, INC."
filed_at: "2022-07-28T23:59:59+00:00"
generated_at: "2026-06-24T07:42:45.240411+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.3
calibrated_materiality_score: 0.3
confidence: "high"
source: SEC EDGAR
---

# Surfside Acquisition appoints Grassi & Co. as new independent auditor for FY2022

## Summary
- Grassi & Co. appointed as independent registered public accounting firm for fiscal year ending Dec 31, 2022.
- No prior consultations with Grassi on accounting principles or audit opinions.
- No disagreements or reportable events with the predecessor auditor occurred.
- Change effective July 22, 2022.

## SEC filing metadata
- accession: 0001213900-22-042318
- form_type: 8-K
- ticker: FISN
- cik: 0001918102
- company_name: DEEP FISSION, INC.
- filed_at: 2022-07-28T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.3
- calibrated_materiality_score: 0.3
- confidence: high
- sec_items: 4.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1918102/000121390022042318/0001213900-22-042318-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1918102/000121390022042318/ea163444-8k_surfside.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001213900-22-042318
- JSON: https://secwatch.observer/filing/0001213900-22-042318.json
- Plain text: https://secwatch.observer/filing/0001213900-22-042318.txt

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