Gwendolyn G Mizell

Insider

First SEC filing: Oct. 11, 2022 · Latest: Oct. 11, 2022

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Insider at Companies where this person is a reporting insider.
Insider transactions Every share this person bought or sold, from Form 4 filings.
Derivatives Options and other derivative holdings reported by this person.
Initial holdings The stakes this person held when they first started reporting.

Insider at

Insider transactions

0 buys (P) 2 sells (S) Net: $-251,040 + 20 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

20 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
May 7, 2026	ROCK	A	3,059	$37.59	$114,988	12,734 Direct	+31.62%	Acquired	24.4% (price as of 2026-08-21)
Sept. 3, 2025	AEE	S	1,500	$99.50	$149,250	7,629 Direct	-16.43%	Disposed	9.1% (price as of 2026-08-21)
Aug. 22, 2025	AEE	S	1,000	$101.79	$101,790	9,129 Direct	-9.87%	Disposed	6.6% (price as of 2026-08-21)
May 12, 2025	AEE	F	1,126	$97.40	$109,672	10,095 Direct	-10.03%	Disposed	11.4% (price as of 2026-08-21)
April 30, 2025	ROCK	A	2,172	$52.95	$115,007	9,675 Direct	+28.95%	Acquired	-11.7% (price as of 2026-08-21)
Feb. 28, 2025	AEE	F	796	$101.56	$80,842	11,161 Direct	-6.66%	Disposed	6.9% (price as of 2026-08-21)
Feb. 6, 2025	AEE	A	1,920	—	—	11,953 Direct	+19.14%	Acquired	(price as of 2026-08-21)
Feb. 6, 2025	AEE	A	927	—	—	9,972 Direct	+10.25%	Acquired	(price as of 2026-08-21)
Dec. 11, 2024	AEE	G	1,469	—	—	9,045 Direct	-13.97%	Disposed	(price as of 2026-08-21)
May 1, 2024	ROCK	A	1,670	$68.86	$114,996	7,503 Direct	+28.63%	Acquired	-32.1% (price as of 2026-08-21)
Feb. 29, 2024	AEE	F	363	$71.19	$25,842	10,300 Direct	-3.40%	Disposed	52.5% (price as of 2026-08-21)
Feb. 8, 2024	AEE	A	790	—	—	10,660 Direct	+8.00%	Acquired	(price as of 2026-08-21)
Feb. 8, 2024	AEE	A	1,132	—	—	9,647 Direct	+13.29%	Acquired	(price as of 2026-08-21)
May 3, 2023	ROCK	A	2,117	$54.33	$115,017	5,833 Direct	+56.97%	Acquired	-13.9% (price as of 2026-08-21)
Feb. 28, 2023	AEE	F	611	$82.71	$50,536	8,515 Direct	-6.70%	Disposed	31.2% (price as of 2026-08-21)
Feb. 9, 2023	AEE	A	1,688	—	—	9,124 Direct	+22.70%	Acquired	(price as of 2026-08-21)
Feb. 9, 2023	AEE	A	880	—	—	7,392 Direct	+13.51%	Acquired	(price as of 2026-08-21)
May 6, 2022	ROCK	A	2,460	$42.69	$105,017	3,716 Direct	+195.86%	Acquired	9.6% (price as of 2026-08-21)
Oct. 1, 2021	ROCK	A	150	$81.32	$12,198	534 Direct	+39.06%	Acquired	-42.5% (price as of 2026-08-21)
July 9, 2021	ROCK	A	162	$79.50	$12,879	384 Direct	+72.97%	Acquired	-41.2% (price as of 2026-08-21)
May 5, 2021	ROCK	A	1,256	$83.58	$104,976	1,256 Direct	—	Acquired	-44.0% (price as of 2026-08-21)
April 2, 2021	ROCK	A	222	$71.03	$15,769	222 Direct	—	Acquired	-34.1% (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
Oct. 1, 2021	ROCK	Restricted Stock Unit (MSPP Post-2012) [F1]	Common Stock (150)	—	—	150	Acquired
July 9, 2021	ROCK	Restricted Stock Unit (MSPP Post-2012) [F1]	Common Stock (162)	—	—	162	Acquired
April 2, 2021	ROCK	Restricted Stock Unit (MSPP Post-2012) [F1]	Common Stock (222)	—	—	222	Acquired

Exercise/conversion price is blank when not applicable (e.g. RSUs).

Initial ownership (Form 3) 2 holdings

Securities held when first becoming an insider, per SEC Form 3.

Date	Ticker	Security	Shares	Ownership
Oct. 11, 2022	AEE	Common Stock, $.01 Par Value	—	Indirect
Oct. 11, 2022	AEE	Common Stock, $.01 Par Value	6,512	Direct