SEC Form 4
First Solar, Inc. (FSLR) insider trading
In the 12 months to Oct 26, 2026, 13 FSLR insiders reported open-market sales of $43.4M across 69 filings; no open-market purchases were filed.
Latest filing · Last 12 months · Source: SEC EDGAR · How we count
- Open-market sales
- $43.4M
- 69 filings · 13 insiders
- Open-market purchases
- $0
- 0 filings
- Pre-arranged sales (10b5-1)
- 25 of 69
- $30.3M of $43.4M sold (70%)
Who traded FSLR, and when
- Sale
- Sale, pre-arranged (10b5-1)
FSLR daily close from Oct 27, 2025 to Oct 26, 2026, between $168.47 and $318.25, last $168.47. 69 sale and 0 purchase filings by 13 insiders, marked at their filing dates. Georges Antoun, Chief Commercial Officer: sold $10.6M across 5 filings, first filed Nov 6, 2025, last May 5, 2026. Mark R. Widmar, Chief Executive Officer: sold $9.0M across 7 filings, first filed Mar 3, 2026, last May 27, 2026. Alexander R. Bradley, Chief Financial Officer: sold $4.0M across 4 filings, first filed Mar 3, 2026, last May 5, 2026. Jason E. Dymbort, General Counsel and Secretary: sold $3.8M across 6 filings, first filed Mar 3, 2026, last Aug 12, 2026. Caroline Stockdale, Chief People and Comm. Officer: sold $3.6M across 5 filings, first filed Mar 3, 2026, last Jun 1, 2026. Markus Gloeckler, Chief Technology Officer: sold $3.1M across 8 filings, first filed Mar 3, 2026, last Oct 2, 2026. 7 others: sold $9.3M across 34 filings, first filed Nov 10, 2025, last Aug 18, 2026.
Largest mark · tap a row for others
Georges Antoun · Chief Commercial Officer
Sale $9,914,635
37,412 shares at $265.01 avg
Filed Nov 6, 2025 · traded Nov 4
Pre-arranged (10b5-1) · close on filing date $271.98
Georges Antoun · Chief Commercial Officer
Chief Commercial Officer
$10.6M soldMark R. Widmar · Chief Executive Officer
Chief Executive Officer
$9.0M soldAlexander R. Bradley · Chief Financial Officer
Chief Financial Officer
$4.0M soldJason E. Dymbort · General Counsel and Secretary
General Counsel and Secretary
$3.8M soldCaroline Stockdale · Chief People and Comm. Officer
Chief People and Comm. Officer
$3.6M soldMarkus Gloeckler · Chief Technology Officer
Chief Technology Officer
$3.1M sold7 others
Combined, one mark per week
$9.3M soldOpen-market trades
69 filings in the last 12 months| Insider | Role | Sold | Bought | Filings | Pre-arranged (10b5-1) | Last filed |
|---|---|---|---|---|---|---|
| Georges Antoun | Chief Commercial Officer | $10.6M | — | 5 | 93% of sales | |
| Mark R. Widmar | Chief Executive Officer | $9.0M | — | 7 | 63% of sales | |
| Alexander R. Bradley | Chief Financial Officer | $4.0M | — | 4 | 73% of sales | |
| Jason E. Dymbort | General Counsel and Secretary | $3.8M | — | 6 | 74% of sales | |
| Caroline Stockdale | Chief People and Comm. Officer | $3.6M | — | 5 | 82% of sales | |
| Markus Gloeckler | Chief Technology Officer | $3.1M | — | 8 | 64% of sales | |
| Kuntal Kumar Verma | Chief Manufacturing Officer | $2.6M | — | 10 | 57% of sales | |
| Michael Koralewski | Chief Supply Chain Officer | $2.1M | — | 5 | 75% of sales | |
| Paul H. Stebbins | Director | $1.8M | — | 1 | — | |
| Patrick James Buehler | Chief Product Officer | $1.4M | — | 5 | 65% of sales | |
| Michael T. Sweeney | Director | $1.2M | — | 1 | — | |
| Nathan B. Theurer | VP - Global Controller and CAO | $156.8K | — | 7 | 73% of sales | |
| Samantha L. Sloan | EVP, Corporate Affairs | $135.9K | — | 5 | — |
| Filed | Insider | Type | Shares | Avg price | Value | Held after | Source |
|---|---|---|---|---|---|---|---|
traded | Markus Gloeckler Chief Technology Officer | SalePre-arranged (10b5-1) | 800 | $174.00 | $139.2K | 5,042 | |
traded | Markus Gloeckler Chief Technology Officer | SalePre-arranged (10b5-1) | 800 | $200.00 | $160.0K | 5,842 | |
traded | Samantha L. Sloan EVP, Corporate Affairs | Sale | 127 | $222.95 | $28.3K | 2,018 | |
traded | Jason E. Dymbort General Counsel and Secretary | SalePre-arranged (10b5-1) | 3,700 | $249.38 | $922.7K | 5,624 | |
traded | Michael Koralewski Chief Supply Chain Officer | SalePre-arranged (10b5-1) | 7,000 | $221.51 | $1.6M | 7,642 | |
traded | Markus Gloeckler Chief Technology Officer | SalePre-arranged (10b5-1) | 4,254 | $224.61 | $955.5K | 6,642 | |
traded | Patrick James Buehler Chief Product Officer | SalePre-arranged (10b5-1) | 3,000 | $302.00 | $906.0K | 4,406 | |
traded | Caroline Stockdale Chief People and Comm. Officer | SalePre-arranged (10b5-1) | 10,628 | $275.60 | $2.9M | 23,792 | |
traded | Mark R. Widmar Chief Executive Officer | SalePre-arranged (10b5-1) | 7,172 | $264.89 | $1.9M | 84,827 | |
traded | Mark R. Widmar Chief Executive Officer | SalePre-arranged (10b5-1) | 4,815 | $247.43 | $1.2M | 92,351 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | SalePre-arranged (10b5-1) | 582 | $250.00 | $145.5K | 4,967 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | SalePre-arranged (10b5-1) | 3,671 | $231.42 | $849.6K | 5,549 | |
traded | Mark R. Widmar Chief Executive Officer | SalePre-arranged (10b5-1) | 11,226 | $234.00 | $2.6M | 93,848 | |
traded | Jason E. Dymbort General Counsel and Secretary | SalePre-arranged (10b5-1) | 228 | $218.16 | $49.7K | 9,324 | |
traded | Nathan B. Theurer VP - Global Controller and CAO | SalePre-arranged (10b5-1) | 31 | $218.16 | $6.8K | 0 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | Sale | 270 | $218.16 | $58.9K | 9,220 | |
traded | Mark R. Widmar Chief Executive Officer | Sale | 1,526 | $215.63 | $329.1K | 105,074 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | Sale | 479 | $215.63 | $103.3K | 9,490 | |
traded | Nathan B. Theurer VP - Global Controller and CAO | Sale | 13 | $215.63 | $2.8K | 31 | |
traded | Caroline Stockdale Chief People and Comm. Officer | Sale | 262 | $215.63 | $56.5K | 34,420 | |
traded | Samantha L. Sloan EVP, Corporate Affairs | Sale | 19 | $215.63 | $4.1K | 1,708 | |
traded | Markus Gloeckler Chief Technology Officer | Sale | 420 | $215.63 | $90.6K | 10,896 | |
traded | Jason E. Dymbort General Counsel and Secretary | Sale | 409 | $215.63 | $88.2K | 10,409 | |
traded | Patrick James Buehler Chief Product Officer | Sale | 235 | $215.63 | $50.7K | 7,406 | |
traded | Michael Koralewski Chief Supply Chain Officer | Sale | 215 | $215.63 | $46.4K | 14,642 | |
traded | Alexander R. Bradley Chief Financial Officer | Sale | 498 | $215.63 | $107.4K | 30,712 | |
traded | Georges Antoun Chief Commercial Officer | Sale | 566 | $215.63 | $122.0K | 19,918 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | SalePre-arranged (10b5-1) | 573 | $210.00 | $120.3K | 8,863 | |
traded | Georges Antoun Chief Commercial Officer | Sale | 245 | $200.80 | $49.2K | 19,126 | |
traded | Alexander R. Bradley Chief Financial Officer | SalePre-arranged (10b5-1) | 14,696 | $200.00 | $2.9M | 35,772 | |
traded | Patrick James Buehler Chief Product Officer | Sale | 180 | $200.80 | $36.1K | 7,088 | |
traded | Jason E. Dymbort General Counsel and Secretary | SalePre-arranged (10b5-1) | 9,380 | $199.67 | $1.9M | 9,850 | |
traded | Markus Gloeckler Chief Technology Officer | Sale | 368 | $200.80 | $73.9K | 10,348 | |
traded | Michael Koralewski Chief Supply Chain Officer | Sale | 264 | $200.80 | $53.0K | 14,339 | |
traded | Samantha L. Sloan EVP, Corporate Affairs | Sale | 120 | $200.80 | $24.1K | 1,683 | |
traded | Caroline Stockdale Chief People and Comm. Officer | Sale | 335 | $200.80 | $67.3K | 34,060 | |
traded | Nathan B. Theurer VP - Global Controller and CAO | SalePre-arranged (10b5-1) | 131 | $199.87 | $26.2K | 0 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | SalePre-arranged (10b5-1) | 572 | $200.40 | $114.6K | 9,436 | |
traded | Mark R. Widmar Chief Executive Officer | Sale | 1,937 | $200.80 | $388.9K | 102,798 | |
traded | Nathan B. Theurer VP - Global Controller and CAO | SalePre-arranged (10b5-1) | 324 | $195.70 | $63.4K | 0 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | SalePre-arranged (10b5-1) | 408 | $195.70 | $79.8K | 9,101 | |
traded | Mark R. Widmar Chief Executive Officer | Sale | 5,537 | $190.36 | $1.1M | 101,582 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | Sale | 1,386 | $190.36 | $263.8K | 9,509 | |
traded | Nathan B. Theurer VP - Global Controller and CAO | Sale | 157 | $190.36 | $29.9K | 438 | |
traded | Caroline Stockdale Chief People and Comm. Officer | Sale | 1,041 | $190.36 | $198.2K | 33,595 | |
traded | Samantha L. Sloan EVP, Corporate Affairs | Sale | 303 | $190.36 | $57.7K | 1,659 | |
traded | Michael Koralewski Chief Supply Chain Officer | Sale | 756 | $190.36 | $143.9K | 14,196 | |
traded | Markus Gloeckler Chief Technology Officer | Sale | 1,325 | $190.36 | $252.2K | 10,668 | |
traded | Jason E. Dymbort General Counsel and Secretary | Sale | 1,305 | $190.36 | $248.4K | 18,376 | |
traded | Patrick James Buehler Chief Product Officer | Sale | 697 | $190.36 | $132.7K | 6,841 | |
traded | Alexander R. Bradley Chief Financial Officer | Sale | 1,756 | $190.36 | $334.3K | 43,810 | |
traded | Georges Antoun Chief Commercial Officer | Sale | 791 | $190.36 | $150.6K | 18,784 | |
traded | Markus Gloeckler Chief Technology Officer | SalePre-arranged (10b5-1) | 3,640 | $196.95 | $716.9K | 8,037 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | SalePre-arranged (10b5-1) | 728 | $196.95 | $143.4K | 7,606 | |
traded | Nathan B. Theurer VP - Global Controller and CAO | SalePre-arranged (10b5-1) | 92 | $196.95 | $18.1K | 0 | |
traded | Georges Antoun Chief Commercial Officer | Sale | 1,958 | $194.95 | $381.7K | 17,705 | |
traded | Caroline Stockdale Chief People and Comm. Officer | Sale | 1,650 | $195.93 | $323.3K | 32,200 | |
traded | Mark R. Widmar Chief Executive Officer | Sale | 7,738 | $195.93 | $1.5M | 91,787 | |
traded | Jason E. Dymbort General Counsel and Secretary | Sale | 3,273 | $195.93 | $641.3K | 16,625 | |
traded | Kuntal Kumar Verma Chief Manufacturing Officer | Sale | 3,426 | $195.93 | $671.3K | 8,334 | |
traded | Nathan B. Theurer VP - Global Controller and CAO | Sale | 49 | $195.93 | $9.6K | 92 | |
traded | Markus Gloeckler Chief Technology Officer | Sale | 3,425 | $195.93 | $671.1K | 11,677 | |
traded | Michael Koralewski Chief Supply Chain Officer | Sale | 1,330 | $195.93 | $260.6K | 12,865 | |
traded | Samantha L. Sloan EVP, Corporate Affairs | Sale | 111 | $195.93 | $21.7K | 1,145 | |
traded | Patrick James Buehler Chief Product Officer | Sale | 1,361 | $195.93 | $266.7K | 5,863 | |
traded | Alexander R. Bradley Chief Financial Officer | Sale | 3,194 | $195.93 | $625.8K | 40,794 | |
traded | Michael T. Sweeney Director | Sale | 4,500 | $271.11 | $1.2M | 13,662 | |
traded | Paul H. Stebbins Director | Sale | 7,000 | $262.40 | $1.8M | 16,208 | |
traded | Georges Antoun Chief Commercial Officer | SalePre-arranged (10b5-1) | 37,412 | $265.01 | $9.9M | 21,111 |
GET /stocks/filings/vX/form-4?tickers=FSLR&filing_date.gte=2025-10-26&sort=filing_date.desc&limit=500{
"status": "OK",
"results": [
{
"tickers": [
"FSLR"
],
"issuer_cik": "0001274494",
"owner_cik": "0001819680",
"accession_number": "0001274494-26-000186",
"form_type": "4",
"filing_date": "2026-10-02",
"period_of_report": "2026-10-01",
"issuer_name": "FIRST SOLAR, INC.",
"issuer_trading_symbol": "FSLR",
"owner_name": "Gloeckler Markus",
"is_officer": true,
"officer_title": "Chief Technology Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-10-01",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 800,
"transaction_price_per_share": 174,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 5042,
"transaction_value": 139200,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on May 4, 2026."
}
]
},
{
"tickers": [
"FSLR"
],
"issuer_cik": "0001274494",
"owner_cik": "0001819680",
"accession_number": "0001274494-26-000182",
"form_type": "4",
"filing_date": "2026-09-02",
"period_of_report": "2026-09-01",
"issuer_name": "FIRST SOLAR, INC.",
"issuer_trading_symbol": "FSLR",
"owner_name": "Gloeckler Markus",
"is_officer": true,
"officer_title": "Chief Technology Officer",
"security_type": "non_derivative",
"record_type": "transaction",
"security_title": "Common Stock",
"transaction_timeliness": "O",
"aff_10b5_one": true,
"transaction_date": "2026-09-01",
"transaction_code": "S",
"equity_swap_involved": false,
"transaction_shares": 800,
"transaction_price_per_share": 200,
"transaction_acquired_disposed": "D",
"shares_owned_following_transaction": 5842,
"transaction_value": 160000,
"direct_or_indirect": "D",
"footnotes": [
{
"id": "F1",
"description": "This transaction was effected pursuant to a Rule 10b5-1 trading plan previously adopted by the reporting person on May 4, 2026."
}
]
}
]
}
// trimmed to 2 resultsThe response includes every Form 4 record; this page keeps open-market purchases and sales on common stock and removes duplicate joint-filer rows.
Other insider activity (not market trades) · 119 records
- Option exercises69 records
- Tax withholding4 records
- Grants and awards45 records
- Gifts1 record
Reported on Form 4 but not purchases or sales in the market, so not counted in the totals above.
How to read this page
- Open-market purchase or sale
- A buy or sell of the company's stock at market price. Grants, option exercises, shares withheld for tax, gifts and employee stock plan purchases are listed separately and not counted.
- Pre-arranged (10b5-1)
- The insider marked the filing as made under a trading plan set up in advance (SEC Rule 10b5-1). The mark covers the whole filing, and an unmarked filing may still be under a plan.
- Filing date
- Insiders have two business days to report a trade. Totals and the chart use the filing date, when the trade became public.
Frequently asked questions
Has First Solar, Inc.'s CEO sold stock?
Yes. Mark R. Widmar (CEO) sold 39,951 shares ($9.0M) between Mar 2026 and May 2026, $5.7M of it under a pre-arranged 10b5-1 plan.
How current is FSLR’s insider data?
These are FSLR Form 4 filings from the last year, refreshed daily. The Massive Form 4 API has the full, continuously updated record.
What counts as an open-market buy or sell?
Only purchases and sales at the market price. Option exercises, grants, gifts, and shares withheld for taxes are reported on Form 4 but are left out of the buy and sell totals.
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Track FSLR insider trades with your agent
This page joins two Massive endpoints: Form 4 filings and daily prices. Ask an agent to watch for new filings:
Using the Massive API (massive.com/docs/llms.txt), check Form 4 filings for FSLR every day with transaction_code=P and tell me when an insider files an open-market purchase, with their role, shares, price and the filing link.
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