Skip to main content

Stocks

Browse Stocks Search any US-listed stock
Stock Screener Combine ownership, insider and short filters
Valuation Multiples EV/Revenue, EV/EBIT and P/E vs industry
Most Shorted Highest short interest
Squeeze Risk Composite short-squeeze score
Insider Sentiment Stocks insiders are accumulating most
Largest Short Volume Daily short-volume leaders
Highest Off-Exchange Share Dark-pool / OTC volume leaders
Largest Buybacks Biggest share-repurchase programs
Going-Concern Flags Companies disclosing going-concern doubt

Institutions

Filers & Rankings

Browse Filers All 13F institutional filers
Top by AUM Largest filers by assets
Smart Money Index Top funds' highest-conviction basket
Superinvestors Famous value investors' portfolios
AUM Movers Biggest assets-under-management swings
Most-Held Stocks Stocks owned by the most filers
Last Quarter's Movers Notable position changes
Overlap Matrix Compare filer portfolios side by side
Clone Backtest Backtest a combined clone of several filers
Beneficial Ownership Recent 13D / 13G >5% stakes

13F Activity

13F Statistics Aggregate filing statistics
Latest Filings Newest 13F submissions
13F Trends Sector and flow trends
Double-Down Report Increased-conviction buys
Conviction Heat Map Crowded positions at a glance

Markets

Insider Trading Corporate insider buys and sells
Funds & ETFs Registered funds and ETFs from Form NPORT-P
Investment Advisers SEC-registered Form ADV firms
Economic Data Federal Reserve and macro indicators
Economic Calendar Upcoming macro data releases
FDA Calendar Upcoming FDA advisory-committee meetings
Congress Net Worth Richest members by disclosed net worth
Congress Leaderboard Members ranked by portfolio performance

Log In Register

Menu

Stocks

Browse Stocks
Stock Screener
Valuation Multiples
Most Shorted
Squeeze Risk
Insider Sentiment
Largest Short Volume
Highest Off-Exchange Share
Largest Buybacks
Going-Concern Flags

Institutions

Filers & Rankings
Browse Filers
Top by AUM
Smart Money Index
Superinvestors
AUM Movers
Most-Held Stocks
Last Quarter's Movers
Overlap Matrix
Clone Backtest
Beneficial Ownership
13F Activity
13F Statistics
Latest Filings
13F Trends
Double-Down Report
Conviction Heat Map

Markets

Insider Trading
Funds & ETFs
Investment Advisers
Economic Data
Economic Calendar
FDA Calendar
Congress Net Worth
Congress Leaderboard

Log In Register

Stocks
SPOK
8-K

8-K

Spok Holdings, Inc (SPOK)

8-K 2021-09-03 For: 2021-09-02

Added on April 11, 2026

© 2026 Equibles

Stocks Docs Terms Privacy Contact

Please leave this field empty

Report a Problem

Category

Description

Email (optional, for follow-up)