=== SEC Form 4 — Statement of Changes in Beneficial Ownership ===
Document Type: 4
Period of Report: 2026-05-22
10b5-1 Pre-arranged Plan: Yes
--- Issuer ---
Name: FIRST SOLAR, INC. (FSLR)
CIK: 0001274494
--- Reporting Owner ---
Name: Widmar Mark R
CIK: 0001362208
Role: Director, Officer (Chief Executive Officer)
--- Non-Derivative Transactions ---
[Transaction #1]
Security: Common Stock
Date: 2026-05-22 | Code: S (Open market sale)
Shares: -239 | Price: $250.02
Total Value: $59,754.78
Shares Owned After: 88,794 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F2] This transaction was executed in multiple trades at prices ranging from $250 to $250.80. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #2]
Security: Common Stock
Date: 2026-05-22 | Code: S (Open market sale)
Shares: -172 | Price: $251.53
Total Value: $43,263.16
Shares Owned After: 88,622 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F3] This transaction was executed in multiple trades at prices ranging from $251.12 to $252.10. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #3]
Security: Common Stock
Date: 2026-05-22 | Code: S (Open market sale)
Shares: -97 | Price: $252.87
Total Value: $24,528.39
Shares Owned After: 88,525 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F4] This transaction was executed in multiple trades at prices ranging from $252.18 to $253.12. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #4]
Security: Common Stock
Date: 2026-05-22 | Code: S (Open market sale)
Shares: -218 | Price: $253.63
Total Value: $55,291.34
Shares Owned After: 88,307 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F5] This transaction was executed in multiple trades at prices ranging from $253.23 to $254.20. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #5]
Security: Common Stock
Date: 2026-05-22 | Code: S (Open market sale)
Shares: -916 | Price: $254.93
Total Value: $233,515.88
Shares Owned After: 87,391 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F6] This transaction was executed in multiple trades at prices ranging from $254.27 to $255.23. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #6]
Security: Common Stock
Date: 2026-05-22 | Code: S (Open market sale)
Shares: -64 | Price: $255.59
Total Value: $16,357.76
Shares Owned After: 87,327 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F7] This transaction was executed in multiple trades at prices ranging from $255.31 to $255.88. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #7]
Security: Common Stock
Date: 2026-05-22 | Code: S (Open market sale)
Shares: -75 | Price: $256.32
Total Value: $19,224.00
Shares Owned After: 87,252 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F8] This transaction was executed in multiple trades at prices ranging from $255.93 to $256.76. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #8]
Security: Common Stock
Date: 2026-05-22 | Code: S (Open market sale)
Shares: -149 | Price: $257.55
Total Value: $38,374.95
Shares Owned After: 87,103 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F9] This transaction was executed in multiple trades at prices ranging from $256.92 to $257.81. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #9]
Security: Common Stock
Date: 2026-05-22 | Code: S (Open market sale)
Shares: -47 | Price: $258.48
Total Value: $12,148.56
Shares Owned After: 87,056 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F10] This transaction was executed in multiple trades at prices ranging from $258.17 to $259.05. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #10]
Security: Common Stock
Date: 2026-05-26 | Code: S (Open market sale)
Shares: -364 | Price: $265.15
Total Value: $96,514.60
Shares Owned After: 86,692 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F11] This transaction was executed in multiple trades at prices ranging from $264.92 to $265.53. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #11]
Security: Common Stock
Date: 2026-05-26 | Code: S (Open market sale)
Shares: -1,237 | Price: $266.60
Total Value: $329,784.20
Shares Owned After: 85,455 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F12] This transaction was executed in multiple trades at prices ranging from $266.13 to $267.01. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #12]
Security: Common Stock
Date: 2026-05-26 | Code: S (Open market sale)
Shares: -628 | Price: $267.72
Total Value: $168,128.16
Shares Owned After: 84,827 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F13] This transaction was executed in multiple trades at prices ranging from $267.39 to $268.33. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #13]
Security: Common Stock
Date: 2026-05-26 | Code: S (Open market sale)
Shares: -1,009 | Price: $268.89
Total Value: $271,310.01
Shares Owned After: 83,818 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F14] This transaction was executed in multiple trades at prices ranging from $268.47 to $269.17. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #14]
Security: Common Stock
Date: 2026-05-26 | Code: S (Open market sale)
Shares: -632 | Price: $270.05
Total Value: $170,671.60
Shares Owned After: 83,186 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F15] This transaction was executed in multiple trades at prices ranging from $269.80 to $270.41. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #15]
Security: Common Stock
Date: 2026-05-26 | Code: S (Open market sale)
Shares: -726 | Price: $271.23
Total Value: $196,912.98
Shares Owned After: 82,460 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F16] This transaction was executed in multiple trades at prices ranging from $270.88 to $271.85. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #16]
Security: Common Stock
Date: 2026-05-26 | Code: S (Open market sale)
Shares: -473 | Price: $273.17
Total Value: $129,209.41
Shares Owned After: 81,987 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F17] This transaction was executed in multiple trades at prices ranging from $272.59 to $273.58. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
[Transaction #17]
Security: Common Stock
Date: 2026-05-26 | Code: S (Open market sale)
Shares: -126 | Price: $276.29
Total Value: $34,812.54
Shares Owned After: 81,861 | Ownership: D (Direct)
Footnotes:
[F1] This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
[F18] This transaction was executed in multiple trades at prices ranging from $276.28 to $276.29. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
--- Footnotes (Complete Index) ---
F1: This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on November 6, 2025.
F10: This transaction was executed in multiple trades at prices ranging from $258.17 to $259.05. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F11: This transaction was executed in multiple trades at prices ranging from $264.92 to $265.53. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F12: This transaction was executed in multiple trades at prices ranging from $266.13 to $267.01. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F13: This transaction was executed in multiple trades at prices ranging from $267.39 to $268.33. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F14: This transaction was executed in multiple trades at prices ranging from $268.47 to $269.17. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F15: This transaction was executed in multiple trades at prices ranging from $269.80 to $270.41. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F16: This transaction was executed in multiple trades at prices ranging from $270.88 to $271.85. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F17: This transaction was executed in multiple trades at prices ranging from $272.59 to $273.58. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F18: This transaction was executed in multiple trades at prices ranging from $276.28 to $276.29. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F2: This transaction was executed in multiple trades at prices ranging from $250 to $250.80. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F3: This transaction was executed in multiple trades at prices ranging from $251.12 to $252.10. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F4: This transaction was executed in multiple trades at prices ranging from $252.18 to $253.12. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F5: This transaction was executed in multiple trades at prices ranging from $253.23 to $254.20. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F6: This transaction was executed in multiple trades at prices ranging from $254.27 to $255.23. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F7: This transaction was executed in multiple trades at prices ranging from $255.31 to $255.88. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F8: This transaction was executed in multiple trades at prices ranging from $255.93 to $256.76. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
F9: This transaction was executed in multiple trades at prices ranging from $256.92 to $257.81. The price reported above reflects the weighted average sale price for the transactions reported on this line. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
--- Signature ---
/s/ /s/ Jason E. Dymbort, attorney-in-fact (2026-05-27)
