First Solar, Inc. common stock is reported as beneficially owned by a group of affiliated entities including G1 Execution Services, SIG Brokerage, Susquehanna Fundamental Investments, Susquehanna Investment Group, and Susquehanna Securities. The Reporting Persons collectively report beneficial ownership of 7,518,532 Shares of First Solar common stock, representing 7.0% of the class, based on 107,469,302 Shares outstanding as of June 30, 2026. The reported holdings include options, notably options to buy 7,318,400 Shares held by Susquehanna Securities and options to buy 15,000 Shares included in SIG Brokerage’s position. Each entity has sole voting and dispositive power over the shares it beneficially owns and shared voting and dispositive power over all shares reported for the group, while each disclaims beneficial ownership of shares directly owned by the others.
Positive
None.
Negative
None.
Key Figures
Shares beneficially owned:7,518,532 SharesPercent of class:7.0%Shares outstanding:107,469,302 Shares+3 more
6 metrics
Shares beneficially owned7,518,532 SharesTotal First Solar common shares reported as beneficially owned by the Reporting Persons
Percent of class7.0%Portion of First Solar common stock represented by the reported 7,518,532 shares
Shares outstanding107,469,302 SharesFirst Solar common shares outstanding as of June 30, 2026 from the Form 10-Q
Options held by Susquehanna Securities7,318,400 SharesOptions to buy First Solar shares included in Susquehanna Securities, LLC beneficial ownership
Options held by SIG Brokerage15,000 SharesOptions to buy First Solar shares included in SIG Brokerage, LP beneficial ownership
Sole voting power (Susquehanna Securities)7,334,163 SharesNumber of shares over which Susquehanna Securities, LLC has sole voting power
Key Terms
beneficial ownership, dispositive power, Schedule 13G, CUSIP, +1 more
5 terms
beneficial ownershipfinancial
"The information required by this Item 4(a) is set forth in Row 9... Amount beneficially owned"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
dispositive powerfinancial
"Sole Dispositive Power 7,334,163.00 8 | Shared Dispositive Power 7,518,532.00"
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.
Schedule 13Gregulatory
"This statement is filed by the entities listed below... Schedule 13G/A"
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.
CUSIPfinancial
"(e) | CUSIP No.: 336433107"
A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.
percent of classfinancial
"(b) | Percent of class: 7.0 %"
Percent of class is the portion of a specific category of securities—such as a company’s common shares, preferred shares, or a bond series—that takes part in or approves a corporate action (vote, consent, tender, etc.). Investors watch this number because it reveals how much support or opposition exists within that particular shareholder group; like counting how many members of a club back a proposal, it can determine whether a plan passes or how influence is distributed.
FAQ
What stake in First Solar (FSLR) do the Susquehanna-affiliated entities report?
The Reporting Persons collectively report beneficial ownership of 7,518,532 First Solar common shares, representing 7.0% of the outstanding stock, based on 107,469,302 shares outstanding as of June 30, 2026.
Who are the Reporting Persons in this First Solar (FSLR) Schedule 13G/A?
The filing lists five Reporting Persons: G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Fundamental Investments, LLC, Susquehanna Investment Group, and Susquehanna Securities, LLC, which may be deemed a group for this ownership report.
How much of the First Solar (FSLR) position is in options according to the filing?
The report notes that Susquehanna Securities’ holdings include options to buy 7,318,400 shares and SIG Brokerage’s holdings include options to buy 15,000 shares. Susquehanna Investment Group’s reported beneficial ownership consists of options to buy Shares.
What percentage of First Solar (FSLR) does 7,518,532 shares represent?
The Reporting Persons state that their 7,518,532 beneficially owned shares represent 7.0% of First Solar’s common stock, calculated using 107,469,302 shares outstanding as of June 30, 2026, from the company’s Form 10-Q.
Do the Reporting Persons share voting and dispositive power over First Solar (FSLR) shares?
Each Reporting Person has sole voting and dispositive power over the shares it owns and shared voting and dispositive power over all reported shares. Each also disclaims beneficial ownership of shares directly owned by any other Reporting Person.
What is the CUSIP and class of securities covered for First Solar (FSLR)?
The securities are First Solar’s Common Stock, $0.001 par value per share, with CUSIP 336433107. The Schedule 13G/A Amendment No. 3 concerns beneficial ownership of this common stock class.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 3)
First Solar, Inc.
(Name of Issuer)
Common Stock, $0.001 par value per share
(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
G1 Execution Services, 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
ILLINOIS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
17.00
6
Shared Voting Power
7,518,532.00
7
Sole Dispositive Power
17.00
8
Shared Dispositive Power
7,518,532.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,518,532.00
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)
7.0 %
12
Type of Reporting Person (See Instructions)
BD, OO
Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which, together with Susquehanna Fundamental Investments, LLC, may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.
SCHEDULE 13G
CUSIP Number(s):
336433107
1
Names of Reporting Persons
SIG Brokerage, LP
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
16,420.00
6
Shared Voting Power
7,518,532.00
7
Sole Dispositive Power
16,420.00
8
Shared Dispositive Power
7,518,532.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,518,532.00
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)
7.0 %
12
Type of Reporting Person (See Instructions)
BD, PN
Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which, together with Susquehanna Fundamental Investments, LLC, may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.
SCHEDULE 13G
CUSIP Number(s):
336433107
1
Names of Reporting Persons
Susquehanna Fundamental Investments, 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
116,932.00
6
Shared Voting Power
7,518,532.00
7
Sole Dispositive Power
116,932.00
8
Shared Dispositive Power
7,518,532.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,518,532.00
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)
7.0 %
12
Type of Reporting Person (See Instructions)
OO
Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which, together with Susquehanna Fundamental Investments, LLC, may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.
SCHEDULE 13G
CUSIP Number(s):
336433107
1
Names of Reporting Persons
Susquehanna Investment Group
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
PENNSYLVANIA
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
51,000.00
6
Shared Voting Power
7,518,532.00
7
Sole Dispositive Power
51,000.00
8
Shared Dispositive Power
7,518,532.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,518,532.00
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)
7.0 %
12
Type of Reporting Person (See Instructions)
BD, PN
Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which, together with Susquehanna Fundamental Investments, LLC, may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.
SCHEDULE 13G
CUSIP Number(s):
336433107
1
Names of Reporting Persons
Susquehanna Securities, 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
7,334,163.00
6
Shared Voting Power
7,518,532.00
7
Sole Dispositive Power
7,334,163.00
8
Shared Dispositive Power
7,518,532.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
7,518,532.00
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)
7.0 %
12
Type of Reporting Person (See Instructions)
BD, OO
Comment for Type of Reporting Person: With respect to Row 5 through Row 9 above, G1 Execution Services, LLC, SIG Brokerage, LP, Susquehanna Investment Group and Susquehanna Securities, LLC are affiliated independent broker-dealers which, together with Susquehanna Fundamental Investments, LLC, may be deemed a group. For purposes of this report, we have indicated that each reporting person has sole voting and dispositive power with respect to the shares beneficially owned by it and that the reporting persons have shared voting and dispositive power with respect to all shares beneficially owned by all of the reporting persons. Each of the reporting persons disclaims beneficial ownership of shares owned directly by another reporting person.
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:
This statement is filed by the entities listed below, who are collectively referred to herein as "Reporting Persons" with respect to the shares of Common Stock, $0.001 par value per share (the "Shares"), of First Solar, Inc. (the "Company").
(i) G1 Execution Services, LLC
(ii) SIG Brokerage, LP
(iii) Susquehanna Fundamental Investments, LLC
(iv) Susquehanna Investment Group
(v) Susquehanna Securities, LLC
(b)
Address or principal business office or, if none, residence:
The address of the principal business office of G1 Execution Services, LLC is:
175 W. Jackson Blvd.
Suite 1700
Chicago, IL 60604
The address of the principal business office of each of SIG Brokerage, LP, Susquehanna Fundamental Investments, LLC, Susquehanna Investment Group and Susquehanna Securities, LLC is:
401 E. City Avenue
Suite 220
Bala Cynwyd, PA 19004
(c)
Citizenship:
Citizenship is set forth in Row 4 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
(d)
Title of class of securities:
Common Stock, $0.001 par value per share
(e)
CUSIP No.:
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:
The information required by this Item 4(a) is set forth in Row 9 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
The number of Shares reported as beneficially owned by SIG Brokerage, LP includes options to buy 15,000 Shares. The number of Shares reported as beneficially owned by Susquehanna Investment Group consists of options to buy Shares. The number of Shares reported as beneficially owned by Susquehanna Securities, LLC includes options to buy 7,318,400 Shares.
The Company's Quarterly Report on Form 10-Q, filed on July 30, 2026, indicates that there were 107,469,302 Shares outstanding as of June 30, 2026.
(b)
Percent of class:
7.0 %
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
The information required by this Item 4(c)(i) is set forth in Row 5 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
(ii) Shared power to vote or to direct the vote:
The information required by this Item 4(c)(ii) is set forth in Row 6 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
(iii) Sole power to dispose or to direct the disposition of:
The information required by this Item 4(c)(iii) is set forth in Row 7 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
(iv) Shared power to dispose or to direct the disposition of:
The information required by this Item 4(c)(iv) is set forth in Row 8 of the cover page for each Reporting Person hereto and is incorporated herein by reference for each such Reporting Person.
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.
Not Applicable
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.
G1 Execution Services, LLC
Signature:
/s/ Brian Sopinsky
Name/Title:
Brian Sopinsky, Secretary
Date:
08/14/2026
SIG Brokerage, LP
Signature:
/s/ Brian Sopinsky
Name/Title:
Brian Sopinsky, Assistant Secretary
Date:
08/14/2026
Susquehanna Fundamental Investments, LLC
Signature:
/s/ Brian Sopinsky
Name/Title:
Brian Sopinsky, Assistant Secretary
Date:
08/14/2026
Susquehanna Investment Group
Signature:
/s/ Brian Sopinsky
Name/Title:
Brian Sopinsky, General Counsel
Date:
08/14/2026
Susquehanna Securities, LLC
Signature:
/s/ Brian Sopinsky
Name/Title:
Brian Sopinsky, Secretary
Date:
08/14/2026
Exhibit Information
EXHIBIT INDEX
EXHIBIT DESCRIPTION
________ ________
99 Joint Filing Agreement