Summary
Updated Aug 31, 2026
Sterling A. Spainhour Jr. is EVP & CLO of SOUTHERN CO (SO). 9 SEC Form 4 filings on record going back to 2024, most recently on 7 August 2026. Most recent open-market trade: sold $313K of SO on 7 August 2026. Lifetime open-market sales: $610K.
Recent Transactions
14Every recent SEC Form 4 transaction Sterling A. Spainhour Jr. has reported, most recent first.
Trading Pattern
InsiderAlpha's records for Sterling A. Spainhour Jr. go back to 2024: 9 primary Form 4 filings, an average of 3.0 per year. 1 recorded transaction carries a Rule 10b5-1 flag, meaning it was pre-scheduled under a written trading plan rather than discretionary.
Other Insiders Active in the Same Stocks
Insiders who reported open-market trades in the last 12 months at the companies Sterling A. Spainhour Jr. files at. Multiple unrelated insiders buying the same stock within a short window, cluster buying, has historically been one of the strongest Form 4 signals.
- Kimberly S, Greene - $2.42M of SO open-market activity in the last 12 months
- Stan W. Connally - $1.21M of SO open-market activity in the last 12 months
- Christopher Cummiskey - $644K of SO open-market activity in the last 12 months
- Bryan D. Anderson - $582K of SO open-market activity in the last 12 months
- Matthew M. Kim - $525K of SO open-market activity in the last 12 months
More Notable Insiders
Other corporate insiders with significant SEC Form 4 track records on InsiderAlpha:
Frequently Asked Questions
Who is Sterling A. Spainhour Jr.?
Sterling A. Spainhour Jr. is a corporate insider, tracked as EVP & CLO of SOUTHERN CO (SO). InsiderAlpha holds 9 primary Form 4 filings for them, the earliest from 2024, updated as new SEC EDGAR filings are processed.
How many SEC Form 4 filings has Sterling A. Spainhour Jr. submitted recently?
1 primary Form 4 filing in the last 90 days, covering 1 company.
Has Sterling A. Spainhour Jr. been buying or selling stock?
Recorded transactions: 0 open-market purchases and 3 open-market sales ($610K) across all tracked filings.
Where can I see all of Sterling A. Spainhour Jr.'s SEC filings?
All Form 4 filings, transaction values, and 10b5-1 plan flags are listed on this page and updated in real time as new SEC EDGAR filings are processed.
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