Signature
/s/ Elizabeth Vonne - Attorney-in-Fact
Issuer symbol
AEIS
Transactions as of
01 Mar 2026
Net transactions value
-$647,381
Form type
4
Filing time
03 Mar 2026, 19:00:14 UTC
Previous filing
20 Nov 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
COLPITTS BERNARD RAYMOND JR SVP, Chief Accounting Officer 1595 WYNKOOP ST, STE 800, DENVER /s/ Elizabeth Vonne - Attorney-in-Fact 03 Mar 2026 0001699662

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AEIS Common Stock Options Exercise +979 +59% 2,626 01 Mar 2026 Direct F1
transaction AEIS Common Stock Options Exercise +983 +37% 3,609 01 Mar 2026 Direct F2
transaction AEIS Common Stock Tax liability $287,919 -858 -24% $335.57 2,751 01 Mar 2026 Direct F3
transaction AEIS Common Stock Sale $359,462 -1,104 -40% $325.60 1,647 03 Mar 2026 Direct F4, F5

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction AEIS Restricted Stock Units Options Exercise $0 -979 -50% $0.000000 979 01 Mar 2026 Common Stock 979 Direct F1
transaction AEIS Restricted Stock Units Options Exercise $0 -983 -33% $0.000000 1,966 01 Mar 2026 Common Stock 983 Direct F2
transaction AEIS Restricted Stock Units Award $0 +1,328 $0.000000 1,328 01 Mar 2026 Common Stock 1,328 $0.000000 Direct F6
transaction AEIS Performance Units Award $0 +1,327 $0.000000 1,327 01 Mar 2026 Common Stock 1,327 $0.000000 Direct F7
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Buy Plan / Sale Plan: These are also open market purchases/sales of shares, but in this case the transaction is part of a trading plan. Rule 10b5-1 allows insiders to setup a trading plan to buy/sell stocks over a certain period of time. Since the purchases/sales are predetermined, this protects the insiders from violating insider trading law.

Transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c).

Explanation of Responses:

Id Content
F1 On March 1, 2024, the reporting person was granted 2,938 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the second installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.
F2 On March 1, 2025, the reporting person was granted 2,949 restricted stock units ("RSUs") vesting in three equal installments beginning on the first anniversary of the grant date, of which the first installment vested on March 1, 2026. RSUs convert into common stock on a one-for-one basis.
F3 Payment of tax liability by withholding securities incident to vesting of RSUs.
F4 The reported sale was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 19, 2025.
F5 Represents 1,647 unvested restricted stock units.
F6 These employee RSUs were issued pursuant to the Company's Amended and Restated 2023 Omnibus Incentive Plan ("LTI Plan") and will vest in three equal installments beginning on the first anniversary of the grant date.
F7 These performance share awards were issued pursuant to the LTI Plan at 100% of target, have a three-year performance period, and will vest in all or in part upon achievement of performance metrics. Any awards that have not been vested and released at the end of the three-year performance period will be canceled.