---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-23-035240"
form_type: "8-K"
ticker: "NSTS"
cik: "0001881592"
company_name: "NSTS Bancorp, Inc."
filed_at: "2023-12-22T23:59:59+00:00"
generated_at: "2026-06-07T08:21:23.358315+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# NSTS Bancorp sells $30.5M in AFS securities, expects $1.8M after-tax loss

## Summary
- Sold $30.5M in lower-yielding AFS securities (avg yield 2.83%, duration 2.75 yrs); after-tax loss ~$1.8M.
- Proceeds used to repay $10M debt at 5.31%; remainder re-deployed into cash/short-term Treasuries yielding >5%.
- Expects additional $1.1M valuation allowance on deferred tax asset in Q4 2023 due to cumulative taxable losses.
- Company remains well-capitalized; tangible common equity ratio >10%; unused $64.3M FHLB line of credit.
- Repositioning expected to improve earnings starting fiscal 2024; impact on book value per share neutral.

## SEC filing metadata
- accession: 0001437749-23-035240
- form_type: 8-K
- ticker: NSTS
- cik: 0001881592
- company_name: NSTS Bancorp, Inc.
- filed_at: 2023-12-22T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1881592/000143774923035240/0001437749-23-035240-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1881592/000143774923035240/nsts20231222_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-23-035240
- JSON: https://secwatch.observer/filing/0001437749-23-035240.json
- Plain text: https://secwatch.observer/filing/0001437749-23-035240.txt

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