As of November 7, 2026, 7 holders' latest Schedule 13D or 13G filings report owning 5% or more of First Solar, Inc. The largest reported stake is BlackRock, Inc.'s, at 11.8%. 15 filings are on record since August 14, 2025 (Schedule 13G/A, July 28, 2026).
Sell to companies like First Solar, Inc? Enter your website and see 10 with a filed reason to buy from you this month. Free.
Opens in a new tab. No signup.
Key facts
- · Reporting person: Citadel Securities GP LLC · Sole voting: 0 · Shared voting: 6,422,545 · Sole dispositive: 0 · Shared dispositive: 6,422,545 · SCHEDULE 13G/A, 2026-10-15
- · Holder: Citadel Securities GP LLC · Percent: 5% · SCHEDULE 13G
- · Reporting person: G1 Execution Services, LLC · Sole voting: 17 · Shared voting: 7,518,532 · Sole dispositive: 17 · Shared dispositive: 7,518,532 · SCHEDULE 13G/A, 2026-08-14
- · Reporting person: Jane Street Group, LLC · Sole voting: 0 · Shared voting: 5,502,994 · Sole dispositive: 0 · Shared dispositive: 5,502,994 · SCHEDULE 13G, 2026-08-13
- · Reporting person: State Street Corporation · Sole voting: 0 · Shared voting: 3,417,221 · Sole dispositive: 0 · Shared dispositive: 5,576,026 · SCHEDULE 13G, 2026-08-07
First Solar, Inc. has 15 Schedule 13D or 13G filings on record since 2025-08-14. 7 holders' latest filing reports 5% or more of common stock, par value $0.001 per share (the "shares"). Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| BlackRock, Inc. | 11.8% | 12,659,898 | SCHEDULE 13G/A, 2026-07-28 | 2026-06-30 |
| Vanguard Capital Management | 7.3% | 7,836,039 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| G1 Execution Services, LLC | 7% | 7,518,532 | SCHEDULE 13G/A, 2026-08-14 | 2026-06-30 |
| Citadel Securities GP LLC | 6% | 6,422,545 | SCHEDULE 13G/A, 2026-10-15 | 2026-10-08 |
| Vanguard Portfolio Management | 5.32% | 5,710,409 | SCHEDULE 13G, 2026-04-29 | 2026-03-31 |
| State Street Corporation | 5.2% | 5,581,776 | SCHEDULE 13G, 2026-08-07 | 2026-06-30 |
| Jane Street Group, LLC | 5.1% | 5,502,994 | SCHEDULE 13G, 2026-08-13 | 2026-06-30 |
| Fmr LLC | 1.7% | 1,802,934 | SCHEDULE 13G/A, 2026-05-06 | 2026-03-31 |
| The Vanguard Group | 0% | 0 | SCHEDULE 13G/A, 2026-03-26 | 2026-03-13 |
Holding shares or following this stake? See who's behind First Solar, Inc. and the warning signs.
Free to see. No signup.
Keep reading
More on First Solar, Inc. and the records around it.
First Solar, Inc. elsewhere on the record
Companies that share a holder
- Citadel Securities GP LLC also filed stake reports on 24 other companies: CIPHER DIGITAL INC. (Oct 2026), AmpliTech Group, Inc. (Oct 2026), IREN Limited (Sep 2026)
- Capital Ventures International also filed stake reports on 45 other companies: AmpliTech Group, Inc. (Aug 2026), Bitdeer Technologies Group (Aug 2026), Compass Diversified Holdings (Aug 2026)
- JANE STREET GROUP, LLC also filed stake reports on 73 other companies: AXT INC (Nov 2026), BIOVIE INC. (Nov 2026), Bitdeer Technologies Group (Nov 2026)
Watch First Solar, Inc.
Get an email when First Solar, Inc. files again: a new raise, a leadership change, a layoff or an IPO filing. One email first to confirm; nothing else until you click it. At most one a day, one click to stop. Free for up to 3 companies.
Want the whole picture on First Solar, Inc.?
Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
A Full Report on First Solar, Inc.: verified, sourced, every claim cited, ready in a few minutes. See pricing.
What the Full Report on First Solar, Inc. covers
The Short Answer
Which Company This Is
What They Do, And How The Money Works
Who Runs It, And How To Reach Them
The Money: Funding, Valuation, Runway
Who Pays Them, And Who They Are Up Against
Warning Bells
Sources
15 cited sources found
Plus the sections for what you are deciding, which you pick after ordering.
A real finished report, first screen. Opens in a new tab.
Not ready to order yet? Keep this snapshot.
Sends this preview to you once; we won't add you to any list
Voting and dispositive power, as filed
| Reporting person | Sole voting | Shared voting | Sole dispositive | Shared dispositive | Filing |
|---|---|---|---|---|---|
| BlackRock, Inc. | 11,958,403 | 0 | 12,659,898 | 0 | SCHEDULE 13G/A, 2026-07-28 |
| G1 Execution Services, LLC | 17 | 7,518,532 | 17 | 7,518,532 | SCHEDULE 13G/A, 2026-08-14 |
| SIG Brokerage, LP | 16,420 | 7,518,532 | 16,420 | 7,518,532 | SCHEDULE 13G/A, 2026-08-14 |
| Susquehanna Fundamental Investments, LLC | 116,932 | 7,518,532 | 116,932 | 7,518,532 | SCHEDULE 13G/A, 2026-08-14 |
| Susquehanna Investment Group | 51,000 | 7,518,532 | 51,000 | 7,518,532 | SCHEDULE 13G/A, 2026-08-14 |
| Susquehanna Securities, LLC | 7,334,163 | 7,518,532 | 7,334,163 | 7,518,532 | SCHEDULE 13G/A, 2026-08-14 |
| Citadel Securities GP LLC | 0 | 6,422,545 | 0 | 6,422,545 | SCHEDULE 13G/A, 2026-10-15 |
| Citadel Securities LLC | 0 | 5,261,645 | 0 | 5,261,645 | SCHEDULE 13G/A, 2026-10-15 |
| Citadel Securities Group LP | 0 | 6,422,545 | 0 | 6,422,545 | SCHEDULE 13G/A, 2026-10-15 |
| Citadel Advisors LLC | 0 | 36,918 | 0 | 36,918 | SCHEDULE 13G/A, 2026-10-15 |
| Citadel Advisors Holdings LP | 0 | 36,918 | 0 | 36,918 | SCHEDULE 13G/A, 2026-10-15 |
| Citadel GP LLC | 0 | 36,918 | 0 | 36,918 | SCHEDULE 13G/A, 2026-10-15 |
| Kenneth Griffin | 0 | 6,459,463 | 0 | 6,459,463 | SCHEDULE 13G/A, 2026-10-15 |
| State Street Corporation | 0 | 3,417,221 | 0 | 5,576,026 | SCHEDULE 13G, 2026-08-07 |
| Jane Street Group, LLC | 0 | 5,502,994 | 0 | 5,502,994 | SCHEDULE 13G, 2026-08-13 |
| Jane Street Capital, LLC | 0 | 5,499,049 | 0 | 5,499,049 | SCHEDULE 13G, 2026-08-13 |
| Jane Street Global Trading, LLC | 0 | 3,863 | 0 | 3,863 | SCHEDULE 13G, 2026-08-13 |
| Jane Street Singapore Pte. Ltd | 0 | 82 | 0 | 82 | SCHEDULE 13G, 2026-08-13 |
The latest filing identifies First Solar, Inc. by CUSIP 336433107 and gives its principal executive office as 4300 E Camelback Road, Suite 220, Phoenix, AZ 85018 (SCHEDULE 13G/A, 2026-10-15).
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-08-14 | Kenneth Griffin | 5.3% | SCHEDULE 13G |
| 2025-08-14 | Capital Ventures International | 7.9% | SCHEDULE 13G/A |
| 2025-10-30 | The Vanguard Group | 12.79% | SCHEDULE 13G/A |
| 2026-02-05 | Fmr LLC | 6.1% | SCHEDULE 13G |
| 2026-03-26 | The Vanguard Group | 0% | SCHEDULE 13G/A |
| 2026-04-29 | Vanguard Capital Management | 7.3% | SCHEDULE 13G |
| 2026-04-29 | Vanguard Portfolio Management | 5.32% | SCHEDULE 13G |
| 2026-05-06 | Fmr LLC | 1.7% | SCHEDULE 13G/A |
| 2026-05-15 | Capital Ventures International | 5.3% | SCHEDULE 13G/A |
| 2026-07-28 | BlackRock, Inc. | 11.8% | SCHEDULE 13G/A |
| 2026-08-07 | State Street Corporation | 5.2% | SCHEDULE 13G |
| 2026-08-13 | Jane Street Group, LLC | 5.1% | SCHEDULE 13G |
| 2026-08-14 | G1 Execution Services, LLC | 7% | SCHEDULE 13G/A |
| 2026-10-15 | Citadel Securities GP LLC | 5% | SCHEDULE 13G |
| 2026-10-15 | Citadel Securities GP LLC | 6% | SCHEDULE 13G/A |
Questions about who owns First Solar, Inc.
Who owns First Solar, Inc.?
On this page, 7 holders' latest ownership filings report 5% or more of First Solar, Inc.: BlackRock, Inc. (11.8%, Schedule 13G/A, filed 2026-07-28), Vanguard Capital Management (7.3%, Schedule 13G, filed 2026-04-29), G1 Execution Services, LLC (7%, Schedule 13G/A, filed 2026-08-14), Citadel Securities GP LLC (6%, Schedule 13G/A, filed 2026-10-15) and Vanguard Portfolio Management (5.32%, Schedule 13G, filed 2026-04-29); 2 more are listed above.
Who are the largest shareholders of First Solar, Inc.?
By the share each holder's latest filing reports, the largest holders of First Solar, Inc. on this page are BlackRock, Inc. (11.8%), Vanguard Capital Management (7.3%) and G1 Execution Services, LLC (7%).
When did BlackRock, Inc. buy into First Solar, Inc.?
The filings give report dates, not purchase dates. The earliest filing from BlackRock, Inc. on this page is the Schedule 13G/A, filed 2026-07-28, reporting 11.8%. That earliest filing is itself an amendment, which updates an earlier report.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 15 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Tools for this story
Each opens in a new tab, filled in for First Solar, Inc.. With no account yet, you sign up free and land on the result.
Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.