Matthew M. Kim
CIK 2082705 · View on SEC EDGAR ↗
Insider
First SEC filing: Sept. 12, 2025 · Latest: Sept. 12, 2025
On this page
Insider at
Insider transactions
0 buys (P)
5 sells (S)
Net:
$-525,231
+ 16 non-open-market transactions below
last 12 months, based on the transactions shown below
Price change vs current quote, split-adjusted for corporate actions since the filing — not benchmarked, not annualized, not size-weighted
16 other filings hidden
| Date | Ticker | Code | Shares | Price | Value | Owned after | Δ own | A/D | vs now |
|---|---|---|---|---|---|---|---|---|---|
| Aug. 3, 2026 | SOMN | S | 100 | $94.28 | $9,428 | 6,488 Direct | -1.52% | Disposed | -48.1% (price as of 2026-08-21) |
| July 1, 2026 | SOMN | S | 100 | $95.77 | $9,577 | 6,588 Direct | -1.50% | Disposed | -48.9% (price as of 2026-08-21) |
| June 1, 2026 | SOMN | S | 100 | $91.16 | $9,116 | 6,688 Direct | -1.47% | Disposed | -46.3% (price as of 2026-08-21) |
| May 1, 2026 | SOMN | S | 100 | $96.57 | $9,657 | 6,788 Direct | -1.45% | Disposed | -49.3% (price as of 2026-08-21) |
| Feb. 24, 2026 | SOMN | S | 5,123 | $95.15 | $487,453 | 6,888 Direct | -42.65% | Disposed | -48.6% (price as of 2026-08-21) |
P = Open-market purchase · S = Sale · A = Grant/award · M = Option exercise · G = Gift · F = Tax withholding
Insider transactions are not a recommendation; sales are often driven by liquidity or tax reasons.
Derivative holdings (Form 4 Table II)
Options, RSUs and convertible securities reported on Form 4 Table II.
| Date | Ticker | Security | Underlying | Exercise price | Expiration | Shares | A/D |
|---|---|---|---|---|---|---|---|
| April 1, 2026 | SOMN | Performance Restricted Stock Units | Southern Company Common Stock (42) | $0.00 | — | 42 | Disposed |
| April 1, 2026 | SOMN | Southern Co Restricted Stock Units | Southern Company Common Stock (23) | $0.00 | — | 23 | Disposed |
| April 1, 2026 | SOMN | Southern Co Restricted Stock Units | Southern Company Common Stock (13) | $0.00 | — | 13 | Disposed |
| Feb. 5, 2026 | SOMN | Southern Co Restricted Stock Units | Southern Company Common Stock (282) | $0.00 | — | 282 | Disposed |
| Feb. 1, 2026 | SOMN | Southern Co Restricted Stock Units | Southern Company Common Stock (308) | $0.00 | — | 308 | Disposed |
| Jan. 31, 2026 | SOMN | Southern Co Restricted Stock Units | Southern Company Common Stock (317) | $0.00 | — | 317 | Disposed |
Exercise/conversion price is blank when not applicable (e.g. RSUs).
Initial ownership (Form 3) 12 holdings
Securities held when first becoming an insider, per SEC Form 3.
| Date | Ticker | Security | Shares | Ownership |
|---|---|---|---|---|
| Sept. 12, 2025 | SOMN | Southern Company Common Stock | 9,087 | Direct |
| Sept. 12, 2025 | SOMN | Southern Company Common Stock | 2,803 | Indirect |
| Sept. 12, 2025 | SOMN | Southern Co Restricted Stock Units [F2]→ Southern Company Common Stock (635) | 635 | Direct |
| Sept. 12, 2025 | SOMN | Southern Co Restricted Stock Units [F3]→ Southern Company Common Stock (308) | 308 | Direct |
| Sept. 12, 2025 | SOMN | Phantom Stock Units [F4]→ Southern Company Common Stock (367) | 367 | Direct |
| Sept. 12, 2025 | SOMN | Southern Co Restricted Stock Units [F5]→ Southern Company Common Stock (844) | 844 | Direct |
| Aug. 22, 2025 | SOMN | Southern Company Common Stock | 9,009 | Direct |
| Aug. 22, 2025 | SOMN | Southern Company Common Stock | 2,803 | Indirect |
| Aug. 22, 2025 | SOMN | Southern Co Restricted Stock Units [F1]→ Southern Company Common Stock (635) | 635 | Direct |
| Aug. 22, 2025 | SOMN | Southern Co Restricted Stock Units [F2]→ Southern Company Common Stock (308) | 308 | Direct |
| Aug. 22, 2025 | SOMN | Phantom Stock Units [F3]→ Southern Company Common Stock (367) | 367 | Direct |
| Aug. 22, 2025 | SOMN | Southern Co Restricted Stock Units [F4]→ Southern Company Common Stock (844) | 844 | Direct |