---
schema_version: "secwatch.filing_event.v1"
accession: "0001104659-21-112921"
form_type: "8-K"
ticker: "SPOK"
cik: "0001289945"
company_name: "Spok Holdings, Inc"
filed_at: "2021-09-03T23:59:59+00:00"
generated_at: "2026-06-29T05:45:18.109088+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.8
calibrated_materiality_score: 0.8
confidence: "high"
source: SEC EDGAR
---

# Spok announces strategic alternatives review; adopts limited-duration shareholder rights plan

## Summary
- Board initiated strategic review after receiving multiple private expressions of interest to acquire the company.
- Acacia Research/Starboard Value accumulated >5% of SPOK stock; Board invited them to participate equally.
- Adopted limited-duration poison pill effective immediately; triggers at 10% (20% passive) ownership, expires Aug 31, 2022.
- Rights plan includes shareholder-friendly feature: allows special meeting to exempt a qualifying offer.
- No assurance that review will result in a sale or transaction.

## SEC filing metadata
- accession: 0001104659-21-112921
- form_type: 8-K
- ticker: SPOK
- cik: 0001289945
- company_name: Spok Holdings, Inc
- filed_at: 2021-09-03T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.8
- calibrated_materiality_score: 0.8
- confidence: high
- sec_items: 1.01, 3.03, 5.03, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1289945/000110465921112921/0001104659-21-112921-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1289945/000110465921112921/tm2126921d1_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001104659-21-112921
- JSON: https://secwatch.observer/filing/0001104659-21-112921.json
- Plain text: https://secwatch.observer/filing/0001104659-21-112921.txt

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