First Solar FSLR
First Solar is the 411th largest S&P 500 company by market cap, worth $18.5 billion. 10 directors have filed with the SEC in the last 12 months (who counts), 1 of them an executive. 10 other officers are on file. At 30 Jun 2026, BlackRock was its largest institutional holder, with 13.1% of the company.
- CEO
- Mark R. Widmar
- Sector
- Information Technology
- Sub-industry
- Semiconductors
- Headquarters
- Tempe, Arizona
- Founded
- 1999
- More
- Wikipedia
- Market cap
- $18.5B
- 411th largest, 23 Oct 2026 close
- Price to sales
- 3.5
- Market cap over revenue
- Market cap per employee
- $2.3M
- Market cap over employees
- Connections
- 3
- S&P 500 companies sharing a director or officer
Largest institutional holders
Each fund group's share of First Solar. Where a company has several share classes, the share is of its total value.
13F filings for the quarter to 30 Jun 2026
Board and officers
3 people here also hold roles at other S&P 500 companies.
Roles filed up to 30 Sep 2026
| Name | Title |
|---|---|
| Directors (10) | |
| Mark R. WidmarChief Executive OfficerAlso at Albemarle | |
| Michael J. AhearnDirector | |
| Anita M. GeorgeDirector | |
| Lisa A. KroDirector | |
| Curtis A. MorganDirector | |
| William J. PostDirector | |
| Venkata S. M. RenduchintalaDirectorAlso at Accenture | |
| Paul H. StebbinsDirector | |
| Michael T. SweeneyDirector | |
| Norman L. WrightDirector | |
| Officers (10) | |
| Alexander R. BradleyChief Financial OfficerAlso at SandiskLast filed 5 May 2026 | |
| Georges AntounChief Commercial OfficerLast filed 5 May 2026 | |
| Patrick James BuehlerChief Product OfficerLast filed 3 Jun 2026 | |
| Jason E. DymbortGeneral Counsel and SecretaryLast filed 12 Aug 2026 | |
| Markus GloecklerChief Technology OfficerLast filed 2 Sep 2026 | |
| Michael KoralewskiChief Supply Chain OfficerLast filed 5 Aug 2026 | |
| Samantha L. SloanEVP, Corporate AffairsLast filed 3 Sep 2026 | |
| Caroline StockdaleChief People and Comm. OfficerLast filed 1 Jun 2026 | |
| Nathan B. TheurerVP - Global Controller and CAOLast filed 8 May 2026 | |
| Kuntal Kumar VermaChief Manufacturing OfficerLast filed 22 May 2026 | |
Companies that share people with First Solar
Each person's title here, then at the other company.
First Solar's market cap since December 2008
Marked weeks are changes in the share count, such as a merger, not market moves.
Weekly, up to 23 Oct 2026
| Week ending | Market cap |
|---|---|
| 23 Oct 2026 | $18.5B |
| 26 Dec 2025 | $28.9B |
| 27 Dec 2024 | $19.6B |
| 29 Dec 2023 | $18.4B |
| 30 Dec 2022 | $16.0B |
| 31 Dec 2021 | $9.3B |
| 25 Dec 2020 | $10.8B |
| 27 Dec 2019 | $6.0B |
| 28 Dec 2018 | $4.4B |
| 29 Dec 2017 | $7.0B |
| 30 Dec 2016 | $3.3B |
| 25 Dec 2015 | $6.8B |
| 26 Dec 2014 | $4.4B |
| 27 Dec 2013 | $5.5B |
| 28 Dec 2012 | $2.6B |
| 30 Dec 2011 | $2.9B |
| 31 Dec 2010 | $11.2B |
| 25 Dec 2009 | $11.4B |
| 26 Dec 2008 | $10.8B |
Download First Solar's data as JSON, with the weekly market caps in billions of dollars from 5 Dec 2008.
Workforce
Headcount at 31 Dec 2025
- Employees
- 7,900
As of December 31, 2025, we had approximately 7,900 associates (our term for full and part-time employees), the majority of which work in the United States, Malaysia, India, and Vietnam.
Insider trades
Open-market buys and sales by directors and officers. Grants, option exercises and shares withheld for tax are left out.
Trades from 30 Sep 2025 to 30 Sep 2026
Directors and officers sold $43.3 million of stock in 76 sales and made no open-market purchases in the 12 months to 30 Sep 2026.
| Date | Person | Value |
|---|---|---|
| 1 Sep 2026Sale | Markus GloecklerChief Technology Officer | $160K |
| 17 Aug 2026Sale | Samantha L. SloanEVP, Corporate Affairs | $28K |
| 11 Aug 2026Sale | Jason E. DymbortGeneral Counsel and Secretary | $923K |
| 4 Aug 2026Sale | Markus GloecklerChief Technology Officer | $206K |
| 3 Aug 2026Sale | Michael KoralewskiChief Supply Chain Officer | $1.6M |
| 3 Aug 2026Sale | Markus GloecklerChief Technology Officer | $750K |
| 2 Jun 2026Sale | Patrick James BuehlerChief Product Officer | $906K |
| 28 May 2026Sale | Caroline StockdaleChief People and Comm. Officer | $2.9M |
| 26 May 2026Sale | Mark R. WidmarChief Executive Officer | $1.4M |
| 22 May 2026Sale | Mark R. WidmarChief Executive Officer | $502K |
Showing 10 of 76 trades
Trades by members of Congress and officials
Trades members of Congress and senior executive branch officials disclosed, including their families'. Amounts are filed as ranges.
Trades from 20 Oct 2023 to 20 Oct 2026
9 people disclosed 5 purchases and 10 sales of First Solar stock since October 2023.
| Date | Member or official | Amount |
|---|---|---|
| 13 Aug 2026 | John BoozmanSenate, R-AR 路 Bought | $1K to $15K |
| 27 Apr 2026 | Donald J TrumpPresident 路 Sold | $15K to $50K |
| 27 Mar 2026 | Alan ArmstrongSenate, R-OK 路 Bought | $1K to $15K |
| 10 Feb 2026 | Donald J TrumpPresident 路 Sold | $100K to $250K |
| 10 Feb 2026 | Gilbert CisnerosHouse, D-CA 路 Sold | $1K to $15K |
| 29 Jan 2026 | Rohit KhannaHouse, D-CA 路 Sold | $1K to $15K |
| 9 Jan 2026 | Gilbert CisnerosHouse, D-CA 路 Bought | $1K to $15K |
| 23 Apr 2025 | Rohit KhannaHouse, D-CA 路 Bought | $1K to $15K |
| 8 Apr 2025 | Rob BresnahanHouse, R-PA 路 Sold | $1K to $15K |
| 19 Mar 2025 | Dave MinHouse, D-CA 路 Sold | $1K to $15K |
Showing 10 of 15 trades
Not on file: no WARN layoff notices under its own name since October 2023.