Southern is one of the largest utilities in the US. The company serves 9 million customers with vertically integrated electric utilities in three states and natural gas distribution utilities in four states. It owns 46 gigawatts of rate-regulated generating capacity, primarily for serving customers in Georgia, Alabama, and Mississippi. Subsidiary Southern Power owns 13 gigawatts of natural gas generation and renewable energy across the US and sells the electricity primarily under long-term contracts.
SO Form 4 activity by transaction type, last 90 days
Form 4 transaction type
Transactions
Shares
Total value
Open-market sale
6
9,299
$842K
Grant or award
12
7,825
Dollar totals cover purchases and sales only (codes P and S). Grants, option exercises, gifts and tax withholding are counted in shares, because none of them is a trade at a market price.
SO insider transactions (Form 4)
132
149 Form 4 filings on record, the earliest from Oct 2, 2024, newest first. Filing history page 3 of 3.
Footnote F1 (shares): Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 5, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes 83 accrued dividend equivalent units.
Footnote F4 (shares): Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 5, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes 110 accrued dividend equivalent units.
Footnote F4 (shares): Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 5, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes 44 accrued dividend equivalent units.
Footnote F4 (shares): Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 5, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes 96 accrued dividend equivalent units.
Footnote F4 (shares): Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 5, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes 56 accrued dividend equivalent units.
Footnote F4 (shares): Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 5, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes 49 accrued dividend equivalent units.
Footnote F4 (shares): Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of performance share units under Company's Performance Share Program for the 2023-2025 award. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of first 1/3 of performance restricted stock units granted on February 5, 2025. The Compensation and Talent Development Committee certified performance on February 11, 2026. Includes 78 accrued dividend equivalent units.
Footnote F4 (shares): Represents first 1/3 of performance restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon the vesting of the final 1/2 of restricted stock units granted February 6, 2023. Includes 384 accrued dividend equivalents.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholdings.
Footnote F3 (shares): Represents the final 1/2 of restricted stock units granted on February 6, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock.
Footnote F1 (shares): Shares acquired upon vesting of first 1/3 of restricted stock units granted on February 5, 2025. Includes 19 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Represents first 1/3 of restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of first 1/3 of restricted stock units granted on February 5, 2025. Includes 19 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Represents first 1/3 of restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of first 1/3 of restricted stock units granted on February 5, 2025. Includes 10 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Represents first 1/3 of restricted stock units granted on February 5, 2025. The remaining award will vest 1/3 in 2027 and 1/3 in 2028. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 176 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 275 accrued dividend equivalent units.
Footnote F4 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F5 (shares): Represents second 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 120 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 178 accrued dividend equivalent units.
Footnote F4 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F5 (shares): Represents second 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of restricted stock units granted on January 31, 2024. Includes 50 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 79 accrued dividend equivalent units.
Footnote F4 (shares): Represents second 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends… Full note on SEC EDGAR
Footnote F5 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of restricted stock units granted on January 31, 2024. Includes 118 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 183 accrued dividend equivalent units.
Footnote F4 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F5 (shares): Represents second 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends… Full note on SEC EDGAR
Footnote F1 (shares): Represents shares delivered to the Company to cover FICA withholding obligations due because Reporting Person is retirement eligible pursuant to his applicable stock grant documents. Includes 1 accrued dividend equivalent unit.
Footnote F2 (shares): Represents shares delivered to the Company to cover FICA withholding obligations due because Reporting Person is retirement eligible pursuant to his applicable stock grant documents.
Footnote F3 (shares): Shares acquired upon vesting of second 1/3 of restricted stock units granted on January 31, 2024. Includes 49 accrued dividend equivalent units.
Footnote F4 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F5 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 76 accrued dividend equivalent units.
Footnote F6 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F7 (shares): Represents second 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends… Full note on SEC EDGAR
Footnote F8 (shares): Represents restricted stock units granted on February 5, 2025, payable in Southern Company common stock and vest 1/3 per year on the first, second and third anniversary of the grant date. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 184 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 247 accrued dividend equivalent units.
Footnote F4 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F5 (shares): Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 226 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 336 accrued dividend equivalent units.
Footnote F4 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F5 (shares): Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 137 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 212 accrued dividend equivalent units.
Footnote F4 (shares): Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed… Full note on SEC EDGAR
Footnote F5 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 228 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 358 accrued dividend equivalent units.
Footnote F4 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F5 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F6 (shares): Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 268 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 417 accrued dividend equivalent units.
Footnote F4 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F5 (shares): Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 106 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of performance restricted stock units granted on January 31, 2024. Includes 944 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 499 accrued dividend equivalent units.
Footnote F4 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
Footnote F5 (shares): Represents second 1/3 of performance restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed… Full note on SEC EDGAR
Footnote F1 (shares): Shares acquired upon vesting of second 1/3 of restricted stock units granted on January 31, 2024. Includes 23 accrued dividend equivalent units.
Footnote F2 (shares): Shares withheld to satisfy required state and federal tax withholding requirements.
Footnote F3 (shares): Shares acquired upon vesting of final 1/3 of performance restricted stock units granted on February 1, 2023. Includes 37 accrued dividend equivalent units.
Footnote F4 (shares): Represents second 1/3 of restricted stock units granted on January 31, 2024. The remaining award will vest in 2027. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends… Full note on SEC EDGAR
Footnote F5 (shares): Represents final 1/3 of performance restricted stock units granted on February 1, 2023. Each restricted stock unit represents the right to receive, at settlement, one share of common stock. Additional units will be acquired with deemed dividends. Shares will be withheld upon… Full note on SEC EDGAR
An insider files Form 144 before selling restricted or control stock. It announces a planned sale. If the sale goes ahead, it shows up later on a Form 4.
SOUTHERN CO (SO) had 17 insider filings in the last 90 days, with the most recent on 2026-10-05. The full record for SO runs to 149 Form 4 filings, the earliest from 2024-10-02. InsiderAlpha adds new Form 4, Form 144 and 8-K filings as they arrive from SEC EDGAR.
How many insiders are buying SO stock?
No insider purchases of SO were filed in the last 90 days.
How many insiders are selling SO stock?
6 insider sales of SO were filed in the last 90 days, totaling $842K.
Where can I see SO SEC filings (Form 4, 10-K, 10-Q, 8-K)?
This page collects SO Form 4 insider transactions, Form 144 sale notices and 8-K filings in one place. Annual 10-K and quarterly 10-Q reports live on the company's SEC EDGAR page.
House of Representatives Periodic Transaction Reports from 2024. Senate filings are not included yet. The full history of SO beside its insider purchases is in the Congress Tracker.
Matthew M. Kim - OfficerOpen-market sale$8K
Sloane N. Drake - Officer
James Jeffrey Peoples - Officer
Christopher Cummiskey - Officer
David P. Poroch - Officer
Kristine L. Svinicki
John M. Turner Jr.
Lizanne Thomas
William G. Smith Jr.
David E. Meador
Jared MoskowitzDemocrat, FL-23
