Comparable stake leader
VANGUARD CAPITAL MANAGEMENT LLC
SEC ownership of FIRST SOLAR, INC.
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001274494.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
- Public ticker
- FSLR on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
VANGUARD CAPITAL MANAGEMENT LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
VANGUARD CAPITAL MANAGEMENT LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
31 Mar 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001274494
- Issuer location
- Phoenix, AZ
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of FIRST SOLAR, INC. (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
VANGUARD CAPITAL MANAGEME...
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
31 Mar 2026
13D/G
13F
3/4/5
Lead comparable stake: 7.3%
13D/G row: VANGUARD CAPITAL MANAGEMENT LLC
Showing 1-8 of 50 holder rows.
Quick read
VANGUARD CAPITAL MANAGEMENT LLC leads the comparable SEC ownership view at 7.3%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens VANGUARD CAPITAL MANAGEMENT LLC's linked filing trail.
Comparable ownership
Top 5
VANGUARD CAPITAL MANAGEMENT LLC
7.3%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.3%
SUSQUEHANNA SECURITIES, LLC
5.3%
Citadel Securities GP LLC
5.3%
Farhad Fred Ebrahimi
5%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
7.3%
|
$1,545,737,053
7,836,039 shares
|
$0 | 31 Mar 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.3%
|
$1,126,435,279
5,710,409 shares
|
$0 | 31 Mar 2026 |
| SUSQUEHANNA SECURITIES, LLC |
13D/G
Capital Ventures International
|
5.3%
|
$1,163,825,408
5,719,887 shares
|
-$558,853,144 | 31 Mar 2026 |
| Citadel Securities GP LLC |
13D/G
Kenneth Griffin
|
5.3%
|
$922,957,765
5,681,838 shares
|
$0 | 30 Jun 2025 |
| Farhad Fred Ebrahimi |
13D/G
|
5%
|
$726,862,702
5,296,289 shares
|
$0 | 21 Mar 2025 |
| JPMORGAN CHASE & CO |
13D/G
13F
Company
|
3.2%
|
$474,259,307
3,455,693 shares
|
-$277,168,669 | 31 Jan 2025 |
| FMR LLC |
13D/G
13F
Company
|
1.7%
|
$366,842,896
1,802,934 shares
|
-$955,970,833 | 31 Mar 2026 |
| Michael J. Ahearn |
3/4/5
Director
|
0.11%
|
$29,675,989
113,601 shares
|
— | 31 Mar 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$46,118,772.
Buys
$0
Insiders: 0
Sells
$46,118,772
Insiders: 13
Net
-$46,118,772
Shares: -206,018
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 206,018
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 46,838 | $0 | $11,784,922 | -$11,784,922 |
| 3-6 | 0 | 75,989 | $0 | $14,921,853 | -$14,921,853 |
| 6-9 | 0 | 48,912 | $0 | $12,971,434 | -$12,971,434 |
| 9-12 | 0 | 34,279 | $0 | $6,440,563 | -$6,440,563 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-20 of 27 reporting-owner rows connected to FIRST SOLAR, INC.. Open a relationship link for the CIK-to-CIK filing trail.
Rows
27
Largest Forms 3/4/5 holder
Michael J. Ahearn
Net 12M change
-$46,118,771
Latest report
02 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Michael J. Ahearn | Director | $29,675,989 | Mixed | 31 Mar 2026 | ||
| Mark R. Widmar | Chief Executive Officer, Director | $23,908,683 | -$14,614,767 | -38% | Mixed | 22 May 2026 |
| POST WILLIAM J | Director | $7,095,529 | Mixed | 31 Mar 2026 | ||
| Alexander R. Bradley | Chief Financial Officer | $7,007,762 | -$4,006,656 | -36% | Mixed | 04 May 2026 |
| Caroline Stockdale | Chief People and Comm. Officer | $6,771,075 | -$3,574,289 | -35% | Mixed | 28 May 2026 |
| George A. Hambro | Director | $6,655,740 | Mixed | 28 Jun 2024 | ||
| Georges Antoun | Chief Commercial Officer | $4,451,941 | -$10,618,164 | -70% | Mixed | 04 May 2026 |
| Sharon L. Allen | Director | $4,367,584 | Mixed | 30 Jun 2022 | ||
| Paul H. Stebbins | Director | $4,108,364 | -$1,836,804 | -31% | Mixed | 31 Mar 2026 |
| Sweeney Michael T. | Director | $3,683,865 | -$1,219,995 | -25% | Mixed | 31 Mar 2026 |
| R. Craig Kennedy | Director | $3,668,080 | Mixed | 28 Jun 2024 | ||
| Michael Koralewski | Chief Supply Chain Officer | $3,328,454 | -$503,871 | -13% | Mixed | 04 May 2026 |
| Richard D. Chapman | Director | $3,038,100 | Mixed | 28 Jun 2024 | ||
| Molly Joseph | Director | $2,588,122 | Mixed | 30 Jun 2025 | ||
| Markus Gloeckler | Chief Technology Officer | $2,577,815 | -$1,804,644 | -41% | Mixed | 04 May 2026 |
| Jason E. Dymbort | General Counsel and Secretary | $2,262,434 | -$3,293,252 | -59% | Mixed | 06 May 2026 |
| Kuntal Kumar Verma | Chief Manufacturing Officer | $1,484,373 | -$2,550,529 | -63% | Mixed | 21 May 2026 |
| Patrick James Buehler | Chief Product Officer | $1,444,835 | -$1,680,159 | -54% | Mixed | 02 Jun 2026 |
| Anita M. George | Director | $1,310,068 | Mixed | 31 Mar 2026 | ||
| Norman L. Wright | Director | $1,250,246 | Mixed | 31 Mar 2026 |
Recent insider transactions for FIRST SOLAR, INC.
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Patrick James Buehler | FSLR | Common Stock | Sale | -40.5% | $906,000 | $302.00 | -3,000 | 4,406 | 02 Jun 2026 | Direct |
| Caroline Stockdale | FSLR | Common Stock | Sale | -30.9% | $2,929,077 | $275.60 | -10,628 | 23,792 | 28 May 2026 | Direct |
| Mark R. Widmar | FSLR | Common Stock | Sale | -5.97% | $1,397,344 | $268.98 | -5,195 | 81,861 | 26 May 2026 | Direct |
| Mark R. Widmar | FSLR | Common Stock | Sale | -2.22% | $502,459 | $254.15 | -1,977 | 87,056 | 22 May 2026 | Direct |
| Kuntal Kumar Verma | FSLR | Common Stock | Sale | -10.5% | $145,500 | $250.00 | -582 | 4,967 | 21 May 2026 | Direct |
| Mark R. Widmar | FSLR | Common Stock | Sale | -5.13% | $1,191,378 | $247.43 | -4,815 | 89,033 | 21 May 2026 | Direct |
| Mark R. Widmar | FSLR | Common Stock | Sale | -1.37% | $312,026 | $240.02 | -1,300 | 93,848 | 13 May 2026 | Direct |
| Kuntal Kumar Verma | FSLR | Common Stock | Sale | -20.8% | $349,200 | $240.00 | -1,455 | 5,549 | 13 May 2026 | Direct |
| Mark R. Widmar | FSLR | Common Stock | Sale | -9.45% | $2,314,888 | $233.21 | -9,926 | 95,148 | 11 May 2026 | Direct |
| Kuntal Kumar Verma | FSLR | Common Stock | Sale | -24% | $500,360 | $225.79 | -2,216 | 7,004 | 11 May 2026 | Direct |
| Kuntal Kumar Verma | FSLR | Common Stock | Sale | -2.85% | $58,903 | $218.16 | -270 | 9,220 | 06 May 2026 | Direct |
| Nathan B. Theurer | FSLR | Common Stock | Sale | -100% | $6,763 | $218.16 | -31 | 0 | 06 May 2026 | Direct |
| Jason E. Dymbort | FSLR | Common Stock | Sale | -2.39% | $49,740 | $218.16 | -228 | 9,324 | 06 May 2026 | Direct |
| Georges Antoun | FSLR | Common Stock | Sale | -2.76% | $122,047 | $215.63 | -566 | 19,918 | 05 May 2026 | Direct |
| Alexander R. Bradley | FSLR | Common Stock | Sale | -1.6% | $107,384 | $215.63 | -498 | 30,712 | 05 May 2026 | Direct |
| Michael Koralewski | FSLR | Common Stock | Sale | -1.45% | $46,360 | $215.63 | -215 | 14,642 | 05 May 2026 | Direct |
| Patrick James Buehler | FSLR | Common Stock | Sale | -3.08% | $50,673 | $215.63 | -235 | 7,406 | 05 May 2026 | Direct |
| Jason E. Dymbort | FSLR | Common Stock | Sale | -3.78% | $88,193 | $215.63 | -409 | 10,409 | 05 May 2026 | Direct |
| Markus Gloeckler | FSLR | Common Stock | Sale | -3.71% | $90,565 | $215.63 | -420 | 10,896 | 05 May 2026 | Direct |
| Samantha L. Sloan | FSLR | Common Stock | Sale | -1.1% | $4,097 | $215.63 | -19 | 1,708 | 05 May 2026 | Direct |
| Caroline Stockdale | FSLR | Common Stock | Sale | -0.76% | $56,495 | $215.63 | -262 | 34,420 | 05 May 2026 | Direct |
| Nathan B. Theurer | FSLR | Common Stock | Sale | -29.6% | $2,803 | $215.63 | -13 | 31 | 05 May 2026 | Direct |
| Kuntal Kumar Verma | FSLR | Common Stock | Sale | -4.8% | $103,287 | $215.63 | -479 | 9,490 | 05 May 2026 | Direct |
| Mark R. Widmar | FSLR | Common Stock | Sale | -1.43% | $329,051 | $215.63 | -1,526 | 105,074 | 05 May 2026 | Direct |
| Georges Antoun | FSLR | Common Stock | Options Exercise | 7.1% | 1,358 | 20,484 | 04 May 2026 | Direct | ||
| Georges Antoun | FSLR | Restricted Stock Units | Options Exercise | -25% | -1,358 | 4,074 | 04 May 2026 | Direct | ||
| Alexander R. Bradley | FSLR | Common Stock | Options Exercise | 4.03% | 1,210 | 31,210 | 04 May 2026 | Direct | ||
| Alexander R. Bradley | FSLR | Restricted Stock Units | Options Exercise | -25% | -1,210 | 3,630 | 04 May 2026 | Direct | ||
| Michael Koralewski | FSLR | Common Stock | Options Exercise | 3.61% | 518 | 14,857 | 04 May 2026 | Direct | ||
| Michael Koralewski | FSLR | Restricted Stock Units | Options Exercise | -25% | -518 | 1,556 | 04 May 2026 | Direct | ||
| Patrick James Buehler | FSLR | Common Stock | Options Exercise | 7.8% | 553 | 7,641 | 04 May 2026 | Direct | ||
| Patrick James Buehler | FSLR | Restricted Stock Units | Options Exercise | -25% | -553 | 1,660 | 04 May 2026 | Direct | ||
| Jason E. Dymbort | FSLR | Common Stock | Options Exercise | 9.83% | 968 | 10,818 | 04 May 2026 | Direct | ||
| Jason E. Dymbort | FSLR | Restricted Stock Units | Options Exercise | -25% | -968 | 2,904 | 04 May 2026 | Direct | ||
| Markus Gloeckler | FSLR | Common Stock | Options Exercise | 9.35% | 968 | 11,316 | 04 May 2026 | Direct | ||
| Markus Gloeckler | FSLR | Restricted Stock Units | Options Exercise | -25% | -968 | 2,904 | 04 May 2026 | Direct | ||
| Samantha L. Sloan | FSLR | Common Stock | Options Exercise | 2.61% | 44 | 1,727 | 04 May 2026 | Direct | ||
| Samantha L. Sloan | FSLR | Restricted Stock Units | Options Exercise | -24.7% | -44 | 134 | 04 May 2026 | Direct | ||
| Caroline Stockdale | FSLR | Common Stock | Options Exercise | 1.83% | 622 | 34,682 | 04 May 2026 | Direct | ||
| Caroline Stockdale | FSLR | Restricted Stock Units | Options Exercise | -25% | -622 | 1,867 | 04 May 2026 | Direct | ||
| Nathan B. Theurer | FSLR | Common Stock | Options Exercise | 44 | 44 | 04 May 2026 | Direct | |||
| Nathan B. Theurer | FSLR | Restricted Stock Units | Options Exercise | -24.7% | -44 | 134 | 04 May 2026 | Direct | ||
| Kuntal Kumar Verma | FSLR | Common Stock | Options Exercise | 12.5% | 1,106 | 9,969 | 04 May 2026 | Direct | ||
| Kuntal Kumar Verma | FSLR | Restricted Stock Units | Options Exercise | -25% | -1,106 | 3,319 | 04 May 2026 | Direct | ||
| Mark R. Widmar | FSLR | Common Stock | Options Exercise | 3.7% | 3,802 | 106,600 | 04 May 2026 | Direct | ||
| Mark R. Widmar | FSLR | Restricted Stock Units | Options Exercise | -25% | -3,802 | 11,407 | 04 May 2026 | Direct | ||
| Kuntal Kumar Verma | FSLR | Common Stock | Sale | -6.07% | $120,330 | $210.00 | -573 | 8,863 | 15 Apr 2026 | Direct |
| Paul H. Stebbins | FSLR | Common Stock | Award | 1.73% | 267 | 15,727 | 31 Mar 2026 | By Stebbins Family Trust | ||
| Post William J | FSLR | Common Stock | Award | 0.99% | 267 | 27,162 | 31 Mar 2026 | By Post Family Trust | ||
| Sweeney Michael T. | FSLR | Common Stock | Award | 1.93% | 267 | 14,102 | 31 Mar 2026 | Direct |
* marks a reported price that did not pass the local price check.