Jane Street reports 5.1% stake in First Solar

Jane Street Group, LLC and affiliates filed a Schedule 13G reporting a passive ownership stake in First Solar, Inc. common stock.

Rhea-AI Filing Summary

Jane Street Group, LLC and affiliates filed a Schedule 13G reporting a passive ownership stake in First Solar, Inc. common stock. The group reports beneficial ownership of 5,502,994 shares, representing 5.1% of the outstanding common stock. All of these shares are reported with shared voting and dispositive power and no sole voting or dispositive power. The position is held across Jane Street Group, LLC and its subsidiaries, including Jane Street Capital, LLC, Jane Street Global Trading, LLC, and Jane Street Singapore Pte. Limited.

Key Figures

Shares beneficially owned: 5,502,994 shares Percent of class owned: 5.1% Shared voting power: 5,502,994 shares +2 more

5 metrics

Shares beneficially owned 5,502,994 shares Beneficial ownership of First Solar common stock reported by Jane Street group

Percent of class owned 5.1% Portion of First Solar common stock beneficially owned by Jane Street group

Shared voting power 5,502,994 shares Shares over which Jane Street reports shared power to vote or direct the vote

Sole voting power 0 shares Shares over which Jane Street reports sole power to vote

Shared dispositive power 5,502,994 shares Shares over which Jane Street reports shared power to dispose

Key Terms

Schedule 13G, beneficially owned, shared voting power, dispositive power, +1 more

5 terms

Schedule 13G regulatory

"Jane Street Group, LLC and affiliates filed a Schedule 13G reporting a stake"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 5,502,994.00"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

shared voting power financial

"Shared Voting Power 5,502,994.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

dispositive power financial

"Shared Dispositive Power 5,502,994.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

parent holding company regulatory

"If a parent holding company has filed this schedule, pursuant to (ii)(G)"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What ownership stake in First Solar (FSLR) does Jane Street report on this Schedule 13G?

Jane Street Group, LLC and its affiliates report beneficial ownership of 5,502,994 First Solar shares, representing 5.1% of the company’s common stock, all held with shared voting and dispositive power.

Which Jane Street entities are included in the First Solar (FSLR) Schedule 13G filing?

The filing lists Jane Street Group, LLC, Jane Street Capital, LLC, Jane Street Global Trading, LLC, and Jane Street Singapore Pte. Limited as reporting persons, with Jane Street Capital, LLC identified as a registered broker-dealer subsidiary.

How much voting power does Jane Street have over its First Solar (FSLR) shares?

The group reports 0 shares with sole voting power and 5,502,994 shares with shared voting power. It similarly reports 0 shares with sole dispositive power and 5,502,994 shares with shared dispositive power over First Solar common stock.

Is Jane Street’s First Solar (FSLR) ownership on this Schedule 13G above the 5% threshold?

Yes. The Schedule 13G states that Jane Street and its affiliates beneficially own 5.1% of First Solar’s common stock, slightly above the 5% reporting threshold that triggers a beneficial ownership filing.

When was the Schedule 13G for First Solar (FSLR) signed by Jane Street?

The signatures by Jeremy Kahn, as Authorized Signatory for the Jane Street entities, are each dated August 13, 2026, confirming the certification of the reported beneficial ownership information as of that time.

Where are the principal offices of First Solar (FSLR) and Jane Street in this Schedule 13G?

First Solar’s principal executive offices are listed at 4300 E Camelback Road, Suite 220, Phoenix, Arizona 85018. Jane Street’s main U.S. offices are at 250 Vesey Street, 3rd Floor, New York, NY 10281, with an additional Singapore address.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/13/2026 - 04:50 PM Accepted by SEC EDGAR 08/13/2026 - 04:49 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

FIRST SOLAR, INC.

(Name of Issuer)

Common stock, $0.001 par value

(Title of Class of Securities)

336433107

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 336433107

1

Names of Reporting Persons

JANE STREET GROUP, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 5,502,994.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,502,994.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,502,994.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.1 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

CUSIP Number(s): 336433107

1

Names of Reporting Persons

Jane Street Capital, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 5,499,049.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,499,049.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,499,049.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.1 %

12

Type of Reporting Person (See Instructions)

BD

SCHEDULE 13G

CUSIP Number(s): 336433107

1

Names of Reporting Persons

Jane Street Global Trading, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 3,863.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,863.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,863.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.0 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP Number(s): 336433107

1

Names of Reporting Persons

Jane Street Singapore Pte. Ltd

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

SINGAPORE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 82.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 82.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

82.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0.0 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: FIRST SOLAR, INC.
(b)	Address of issuer's principal executive offices: 4300 E CAMELBACK ROAD, SUITE 220, PHOENIX, ARIZONA, 85018.
Item 2.
(a)	Name of person filing: Jane Street Group, LLC; Jane Street Capital, LLC; Jane Street Global Trading, LLC; Jane Street Singapore Pte. Limited;
(b)	Address or principal business office or, if none, residence: Jane Street Group, LLC 250 Vesey Street 3rd Floor New York, NY 10281 Jane Street Capital, LLC 250 Vesey Street 3rd Floor New York, NY 10281 Jane Street Global Trading, LLC 250 Vesey Street 3rd Floor New York, NY 10281 Jane Street Singapore Pte. Limited 2 Central Boulevard, #43-01 IOI Central Boulevard Towers (West Tower) 018916, Singapore
(c)	Citizenship: See Item 4 of Cover Page
(d)	Title of class of securities: Common stock, $0.001 par value
(e)	CUSIP Number(s): 336433107
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 5,502,994.00
(b)	Percent of class: 5.1%
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 5,502,994.00
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 5,502,994.00
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. Subsidiary Jane Street Capital, LLC - (a) Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o) Jane Street Global Trading, LLC - N/A Jane Street Singapore Pte. Limited - N/A
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

JANE STREET GROUP, LLC

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	08/13/2026

Jane Street Capital, LLC

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	08/13/2026

Jane Street Global Trading, LLC

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	08/13/2026

Jane Street Singapore Pte. Ltd

Signature:	/s/ Jeremy Kahn
Name/Title:	Jeremy Kahn (Authorized Signatory)
Date:	08/13/2026