Nathan B. Theurer - 13 Mar 2026 Form 4 Insider Report for FIRST SOLAR, INC. (FSLR)

Role
VP - Global Controller and CAO
Signature
/s/ Jason E. Dymbort, attorney-in-fact
Issuer symbol
FSLR
Transactions as of
13 Mar 2026
Net transactions value
-$26,183
Form type
4
Filing time
17 Mar 2026, 19:32:07 UTC
Previous filing
11 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Theurer Nathan B. VP - Global Controller and CAO C/O FIRST SOLAR, INC., 4300 E CAMELBACK ROAD, SUITE 220, PHOENIX /s/ Jason E. Dymbort, attorney-in-fact 17 Mar 2026 0002052277

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction FSLR Common Stock Options Exercise +131 $0.000000* 131 13 Mar 2026 Direct F1
transaction FSLR Common Stock Sale $7,028 -35 -27% $200.80 96 16 Mar 2026 Direct F2
transaction FSLR Common Stock Sale $19,155 -96 -100% $199.53 0 17 Mar 2026 Direct F3

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 FSLR Restricted Stock Units Options Exercise -131 -50% $0.000000* 130 13 Mar 2026 Common Stock 131 Direct F4, F5
* 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 Represents shares of common stock issued upon vesting of 20% of the restricted stock units granted on March 15, 2022.
F2 Represents shares of common stock sold by the Issuer to satisfy certain tax withholding obligations with the vesting of the restricted stock units.
F3 This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on May 15, 2025.
F4 Each restricted stock unit represents the right to receive, upon vesting, one share of the Issuer's common stock in accordance with the Issuer's 2020 Omnibus Incentive Compensation Plan.
F5 The restricted stock units were granted on March 15, 2022 as part of the Issuer's annual equity grant to certain associates. The restricted stock units granted on March 15, 2022 vest annually at a rate of 20% on each anniversary of the grant date, commencing on the first anniversary of the grant date.