Matthew M. Kim

CIK: 0002082705

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)8 (44.4%)

Position reduction

Option Exercises (M)4 (22.2%)

Derivative conversions

Awards (A)1 (5.6%)

Compensation grants

Other (G, F, J, C, D, …)5 (27.8%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

SOUTHERN CO

Officer

Discretionary Trading P&L

Holdings

Transaction History (18 total)

SO
SOUTHERN CO
Oct 1, 2026
Sale(S)
Direct
100 shares at avg. $82.73$8K
SO
SOUTHERN CO
Sep 3, 2026
Sale(S)
Direct
1.4K shares at avg. $88.87$124K
SO
SOUTHERN CO
Sep 1, 2026
Sale(S)
Direct
100 shares at avg. $88.45$9K
SO
SOUTHERN CO
Aug 3, 2026
Sale(S)
Direct
100 shares at avg. $94.28$9K
SO
SOUTHERN CO
Jul 1, 2026
Sale(S)
Direct
100 shares at avg. $95.77$10K
SO
SOUTHERN CO
Jun 1, 2026
Sale(S)
Direct
100 shares at avg. $91.16$9K
SO
SOUTHERN CO
May 1, 2026
Sale(S)
Direct
100 shares at avg. $96.57$10K
SO
SOUTHERN CO
Apr 1, 2026
Tax Payment(F)
Direct
82 shares at avg. $96.94$8K
SO
SOUTHERN CO
Apr 1, 2026
Exercise(M)
Direct
82 shares-
SO
SOUTHERN CO
Feb 24, 2026
Sale(S)
Direct
5.1K shares at avg. $95.15$487K
SO
SOUTHERN CO
Feb 11, 2026
Award(A)
Direct
4.5K shares-
SO
SOUTHERN CO
Feb 11, 2026
Tax Payment(F)
Direct
2K shares at avg. $90.86$183K
SO
SOUTHERN CO
Feb 5, 2026
Exercise(M)
Direct
292 shares-
SO
SOUTHERN CO
Feb 5, 2026
Tax Payment(F)
Direct
146 shares at avg. $91.08$13K
SO
SOUTHERN CO
Feb 1, 2026
Tax Payment(F)
Direct
173 shares at avg. $89.31$15K
SO
SOUTHERN CO
Feb 1, 2026
Exercise(M)
Direct
345 shares-
SO
SOUTHERN CO
Jan 31, 2026
Exercise(M)
Direct
340 shares-
SO
SOUTHERN CO
Jan 31, 2026
Tax Payment(F)
Direct
170 shares at avg. $89.31$15K

		Type	Shares	Price		Ownership
Oct 1, 2026	SO SOUTHERN CO	Sale(S)	100	$82.73	$8,273	Direct
Sep 3, 2026	SO SOUTHERN CO	Sale(S)	1,400	$88.87	$124,418	Direct
Sep 1, 2026	SO SOUTHERN CO	Sale(S)	100	$88.45	$8,845	Direct
Aug 3, 2026	SO SOUTHERN CO	Sale(S)	100	$94.28	$9,428	Direct
Jul 1, 2026	SO SOUTHERN CO	Sale(S)	100	$95.77	$9,577	Direct
Jun 1, 2026	SO SOUTHERN CO	Sale(S)	100	$91.16	$9,116	Direct
May 1, 2026	SO SOUTHERN CO	Sale(S)	100	$96.57	$9,657	Direct
Apr 1, 2026	SO SOUTHERN CO	Tax Payment(F)	82	$96.94	$7,949	Direct
Apr 1, 2026	SO SOUTHERN CO	Exercise(M)	82	-	$0	Direct
Feb 24, 2026	SO SOUTHERN CO	Sale(S)	5,123	$95.15	$487,453	Direct
Feb 11, 2026	SO SOUTHERN CO	Award(A)	4,450	-	$0	Direct
Feb 11, 2026	SO SOUTHERN CO	Tax Payment(F)	2,014	$90.86	$182,992	Direct
Feb 5, 2026	SO SOUTHERN CO	Exercise(M)	292	-	$0	Direct
Feb 5, 2026	SO SOUTHERN CO	Tax Payment(F)	146	$91.08	$13,298	Direct
Feb 1, 2026	SO SOUTHERN CO	Tax Payment(F)	173	$89.31	$15,451	Direct
Feb 1, 2026	SO SOUTHERN CO	Exercise(M)	345	-	$0	Direct
Jan 31, 2026	SO SOUTHERN CO	Exercise(M)	340	-	$0	Direct
Jan 31, 2026	SO SOUTHERN CO	Tax Payment(F)	170	$89.31	$15,183	Direct

1-18 of 18 transactions

About Kim Matthew M.

Kim Matthew M. (SEC CIK 0002082705) files insider reports with the SEC as Comptroller of SOUTHERN CO (SO).

Signal8 holds 14 ownership filings by Kim Matthew M. (2 Form 3, 12 Form 4), filed between Aug 22, 2025 and Oct 1, 2026. Those filings report 18 transactions, from Jan 31, 2026 to Oct 1, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Kim Matthew M.'s filings is in ATLANTA, GA.

Recent filings by Kim Matthew M.

Oct 1, 2026: Open-market sale of SO shares (Form 4, code S).
Sep 3, 2026: Open-market sale of SO shares (Form 4, code S).
Sep 1, 2026: Open-market sale of SO shares (Form 4, code S).
Aug 3, 2026: Open-market sale of SO shares (Form 4, code S).
Jul 1, 2026: Open-market sale of SO shares (Form 4, code S).

Other insiders filing for SOUTHERN CO (SO)

Akella Janaki, Director
Cooper Shantella E., Director
Etheredge James O, Director
JOHNS JOHN D, Director
GRAIN DAVID J, Director
SMITH WILLIAM G JR, Director

How to read Form 4 transaction codes