William Mastoris

Insider

First SEC filing: Dec. 7, 2021 · Latest: Jan. 7, 2025

On this page

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

WEC selling Aug. 12, 2022

Insider transactions

0 buys (P) 0 sells (S) Net: $0 + 21 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

21 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
Jan. 3, 2025	WEC	F	213	$94.18	$20,060	5,102 Direct	-4.01%	Disposed	18.2% (price as of 2026-08-19)
Jan. 2, 2025	WEC	A	4,870	—	—	4,870 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 2, 2025	WEC	F	168	$94.55	$15,884	5,315 Direct	-3.06%	Disposed	17.7% (price as of 2026-08-19)
Jan. 2, 2025	WEC	A	1,206	—	—	5,483 Direct	+28.20%	Acquired	(price as of 2026-08-19)
Jan. 4, 2024	WEC	F	35	$86.23	$3,018	4,277 Direct	-0.81%	Disposed	29.1% (price as of 2026-08-19)
Jan. 3, 2024	WEC	F	213	$86.26	$18,373	4,312 Direct	-4.71%	Disposed	29.1% (price as of 2026-08-19)
Jan. 2, 2024	WEC	A	5,731	—	—	5,731 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 2, 2024	WEC	A	1,345	—	—	4,525 Direct	+42.30%	Acquired	(price as of 2026-08-19)
Nov. 10, 2023	WEC	I	1,245	$80.31	$99,986	3,808 Direct	+48.58%	Acquired	38.6% (price as of 2026-08-19)
Jan. 4, 2023	WEC	F	34	$94.79	$3,223	3,180 Direct	-1.06%	Disposed	17.4% (price as of 2026-08-19)
Jan. 3, 2023	WEC	A	5,685	—	—	5,685 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 3, 2023	WEC	F	143	$93.69	$13,398	3,214 Direct	-4.26%	Disposed	18.8% (price as of 2026-08-19)
Jan. 3, 2023	WEC	A	851	—	—	3,357 Direct	+33.96%	Acquired	(price as of 2026-08-19)
Aug. 12, 2022	WEC	M	1,345	$52.90	$71,150	3,851 Direct	+53.67%	Acquired	110.4% (price as of 2026-08-19)
Aug. 12, 2022	WEC	M	3,345	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Aug. 12, 2022	WEC	M	1,345	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-19)
Aug. 12, 2022	WEC	S	4,690	$105.04	$492,638	2,506 Direct	-65.18%	Disposed	6.0% (price as of 2026-08-19)
Aug. 12, 2022	WEC	M	3,345	$50.92	$170,327	7,196 Direct	+86.86%	Acquired	118.6% (price as of 2026-08-19)
Jan. 4, 2022	WEC	F	34	$96.28	$3,274	2,506 Direct	-1.34%	Disposed	15.6% (price as of 2026-08-19)
Jan. 3, 2022	WEC	A	9,046	—	—	9,046 Direct	—	Acquired	(price as of 2026-08-19)
Jan. 3, 2022	WEC	F	77	$96.04	$7,395	2,540 Direct	-2.94%	Disposed	15.9% (price as of 2026-08-19)
Jan. 3, 2022	WEC	A	858	—	—	2,617 Direct	+48.78%	Acquired	(price as of 2026-08-19)

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
Jan. 2, 2025	WEC	Stock Option (right to buy)	Common Stock (4,870)	$94.55	Jan. 2, 2035	4,870	Acquired
Jan. 2, 2024	WEC	Stock Option (right to buy)	Common Stock (5,731)	$85.04	Jan. 2, 2034	5,731	Acquired
Nov. 10, 2023	WEC	Phantom Stock Units	Common Stock (1,245)	—	—	1,245	Acquired
Jan. 3, 2023	WEC	Stock Option (right to buy)	Common Stock (5,685)	$93.69	Jan. 3, 2033	5,685	Acquired
Aug. 12, 2022	WEC	Stock Option (right to buy)	Common Stock (3,345)	$50.92	Jan. 4, 2026	3,345	Disposed
Aug. 12, 2022	WEC	Stock Option (right to buy)	Common Stock (1,345)	$52.90	Jan. 2, 2025	1,345	Disposed
Jan. 3, 2022	WEC	Stock Option (right to buy)	Common Stock (9,046)	$96.04	Jan. 3, 2032	9,046	Acquired

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

Initial ownership (Form 3) 10 holdings

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

Date	Ticker	Security	Shares	Ownership
Dec. 7, 2021	WEC	Common Stock	1,759	Direct
Dec. 7, 2021	WEC	Common Stock	2,869	Indirect
Dec. 7, 2021	WEC	Phantom Stock Units→ Common Stock (2,421)	2,421	Direct
Dec. 7, 2021	WEC	Stock Option (right to buy)→ Common Stock (1,345)	1,345	Direct
Dec. 7, 2021	WEC	Stock Option (right to buy)→ Common Stock (3,345)	3,345	Direct
Dec. 7, 2021	WEC	Stock Option (right to buy)→ Common Stock (3,980)	3,980	Direct
Dec. 7, 2021	WEC	Stock Option (right to buy)→ Common Stock (3,685)	3,685	Direct
Dec. 7, 2021	WEC	Stock Option (right to buy)→ Common Stock (3,733)	3,733	Direct
Dec. 7, 2021	WEC	Stock Option (right to buy)→ Common Stock (3,785)	3,785	Direct
Dec. 7, 2021	WEC	Stock Option (right to buy)→ Common Stock (3,901)	3,901	Direct