Tina Donikowski

Insider

First SEC filing: May 4, 2018 · Latest: May 4, 2018

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

AEIS selling Dec. 4, 2025

Insider transactions

0 buys (P) 2 sells (S) Net: $-633,034 + 23 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

23 other filings hidden

Date	Ticker	Code	Shares	Price	Value	Owned after	Δ own	A/D	vs now
July 1, 2026	BLD	D	343	—	—	0 Direct	-100.00%	Disposed
July 1, 2026	BLD	D	3,780	—	—	343 Direct	-91.68%	Disposed
Dec. 4, 2025	AEIS	S 10b5-1	2,257	$210.33	$474,715	8,248 Direct	-21.49%	Disposed	39.3% (price as of 2026-08-21)
Sept. 2, 2025	BLD	G	465	—	—	3,780 Direct	-10.95%	Disposed
Aug. 27, 2025	BLD	S	370	$427.89	$158,319	4,245 Direct	-8.02%	Disposed
May 3, 2025	AEIS	M	2,093	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 3, 2025	AEIS	M	2,093	—	—	10,505 Direct	+24.88%	Acquired	(price as of 2026-08-21)
May 2, 2025	AEIS	A	2,313	—	—	2,313 Direct	—	Acquired	(price as of 2026-08-21)
April 28, 2025	BLD	A	515	$296.65	$152,775	4,615 Direct	+12.56%	Acquired
Nov. 26, 2024	AEIS	S	1,800	$116.84	$210,312	8,412 Direct	-17.63%	Disposed	150.7% (price as of 2026-08-21)
May 15, 2024	BLD	S	640	$436.11	$279,110	4,100 Direct	-13.50%	Disposed
May 5, 2024	AEIS	M	2,257	—	—	0 Direct	-100.00%	Disposed	(price as of 2026-08-21)
May 5, 2024	AEIS	M	2,257	—	—	10,212 Direct	+28.37%	Acquired	(price as of 2026-08-21)
May 3, 2024	AEIS	A	2,093	—	—	2,093 Direct	—	Acquired	(price as of 2026-08-21)
April 29, 2024	BLD	A	340	$414.14	$140,808	4,740 Direct	+7.73%	Acquired
May 8, 2023	BLD	S	1,480	$212.13	$313,952	4,400 Direct	-25.17%	Disposed
May 5, 2023	AEIS	A	2,257	—	—	2,257 Direct	—	Acquired	(price as of 2026-08-21)
May 1, 2023	BLD	A	640	$222.07	$142,125	5,880 Direct	+12.21%	Acquired
Aug. 17, 2022	AEIS	S	1,813	$94.27	$170,912	7,955 Direct	-18.56%	Disposed	210.8% (price as of 2026-08-21)
May 9, 2022	AEIS	A	2,655	—	—	9,768 Direct	+37.33%	Acquired	(price as of 2026-08-21)
May 2, 2022	BLD	A	690	$185.29	$127,850	5,240 Direct	+15.16%	Acquired
May 26, 2021	AEIS	S	1,700	$99.73	$169,541	7,113 Direct	-19.29%	Disposed	193.8% (price as of 2026-08-21)
May 3, 2021	BLD	A	560	$229.10	$128,296	4,550 Direct	+14.04%	Acquired
April 30, 2021	AEIS	A	1,813	—	—	8,813 Direct	+25.90%	Acquired	(price as of 2026-08-21)
March 5, 2021	BLD	S	700	$190.84	$133,588	3,990 Direct	-14.93%	Disposed
June 8, 2020	AEIS	S 10b5-1	200	$73.31	$14,662	7,000 Direct	-2.78%	Disposed	299.6% (price as of 2026-08-21)
June 8, 2020	AEIS	S 10b5-1	900	$72.63	$65,367	7,200 Direct	-11.11%	Disposed	303.4% (price as of 2026-08-21)
June 8, 2020	AEIS	S 10b5-1	4,900	$71.48	$350,252	8,100 Direct	-37.69%	Disposed	309.9% (price as of 2026-08-21)
April 30, 2020	AEIS	A	3,500	—	—	13,000 Direct	+36.84%	Acquired	(price as of 2026-08-21)
April 27, 2020	BLD	A	1,480	—	—	4,690 Direct	+46.11%	Acquired
June 4, 2019	AEIS	A	3,500	$51.87	$181,545	9,500 Direct	+58.33%	Acquired	464.8% (price as of 2026-08-21)
April 29, 2019	BLD	A	1,700	—	—	3,210 Direct	+112.58%	Acquired
May 3, 2018	AEIS	A	6,000	$61.48	$368,880	6,000 Direct	—	Acquired	376.5% (price as of 2026-08-21)
April 30, 2018	BLD	A	1,510	—	—	1,510 Direct	—	Acquired

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
May 3, 2025	AEIS	Restricted Stock Units	Common Stock (2,093)	—	—	2,093	Disposed
May 2, 2025	AEIS	Restricted Stock Units	Common Stock (2,313)	—	—	2,313	Acquired
May 5, 2024	AEIS	Restricted Stock Units	Common Stock (2,257)	—	—	2,257	Disposed
May 3, 2024	AEIS	Restricted Stock Units	Common Stock (2,093)	$0.00	—	2,093	Acquired
May 5, 2023	AEIS	Common Stock	Common Stock (2,257)	$0.00	—	2,257	Acquired

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

Initial ownership (Form 3) 1 holding

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

Date	Ticker	Security	Shares	Ownership
May 4, 2018	AEIS	Common Stock	0	Direct