FIRST INDUSTRIAL LP

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

For the quarterly period ended September 30, 2026

or

For the transition period from to

Commission File Number:1-13102 (First Industrial Realty Trust, Inc.)

333-21873 (First Industrial, L.P.)

(Exact name of Registrant as specified in its Charter)

One North Wacker Drive, Suite 4200

Chicago, Illinois,60606

(Address of principal executive offices, zip code)

(312)344-4300

(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files).

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of "large accelerated filer," "accelerated filer," "smaller reporting company," and "emerging growth company" in Rule 12b-2 of the Exchange Act. (Check one):

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).

At October 22, 2026,132,577,762 shares of First Industrial Realty Trust, Inc.'s Common Stock, $0.01 par value, were outstanding.

EXPLANATORY NOTE

This report combines the Quarterly Reports on Form 10-Q for the period ended September 30, 2026 of First Industrial Realty Trust, Inc., a Maryland corporation (the "Company"), and First Industrial, L.P., a Delaware limited partnership (the "Operating Partnership"). Unless stated otherwise or the context otherwise requires, the terms "we," "our" and "us" refer to the Company and its subsidiaries, including the Operating Partnership and its consolidated subsidiaries.

The Company is a real estate investment trust and the general partner of the Operating Partnership. At September 30, 2026, the Company owned an approximate 96.8% common general partnership interest in the Operating Partnership. The remaining approximate 3.2% common limited partnership interests in the Operating Partnership are owned by limited partners. The limited partners of the Operating Partnership primarily include persons or entities who contributed their direct or indirect interests in properties to the Operating Partnership in exchange for limited partnership interests in the Operating Partnership and recipients of RLP Units (as defined in Note 6 to the Consolidated Financial Statements) of the Operating Partnership pursuant to the Company's stock incentive plan. As the sole general partner of the Operating Partnership, the Company exercises exclusive and complete discretion over the Operating Partnership's day-to-day management and control and can cause it to enter into certain major transactions, including acquisitions, dispositions and refinancings. The management of the Company consists of the same members as the management of the Operating Partnership.

The Company and the Operating Partnership are managed and operated as one enterprise. The financial results of the Operating Partnership are consolidated into the financial statements of the Company. The Company has no significant assets other than its investment in the Operating Partnership. Substantially all of the Company's assets are held by, and its operations are conducted through, the Operating Partnership and its subsidiaries. Therefore, the assets and liabilities of the Company and the Operating Partnership are substantially the same.

We believe it is important to understand the differences between the Company and the Operating Partnership in the context of how the Company and the Operating Partnership operate as an interrelated, consolidated company. The main areas of difference between the Consolidated Financial Statements of the Company and those of the Operating Partnership are:

•Equity, Noncontrolling Interest and Partners' Capital. The 3.2% equity interest in the Operating Partnership held by persons or entities other than the Company is classified as limited partner units in the Operating Partnership's financial statements and as a noncontrolling interest in the Company's financial statements.

•Relationship to Other Real Estate Partnerships. The Company's operations are primarily conducted through the Operating Partnership and its subsidiaries. Additionally, several other limited partnerships, referred to as the "Other Real Estate Partnerships," also contribute to operations. In each of these partnerships, the Operating Partnership is a limited partner, holding at least a 99% interest, while the Company acts as general partner, holding at least a .01% interest, held through several separate wholly-owned corporations. The Other Real Estate Partnerships are variable interest entities consolidated by both the Company and the Operating Partnership. The Company's direct general partnership interests in the Other Real Estate Partnerships are reflected as noncontrolling interests within the Operating Partnership's financial statements.

•Relationship to Service Subsidiary. The Company has a direct wholly-owned subsidiary that does not own any real estate but provides services to various entities owned by the Company. Since the Operating Partnership does not hold an ownership interest in this entity, its operations are reflected in the consolidated results of the Company but not in those of the Operating Partnership. Also, this entity has outstanding obligations to the Operating Partnership, which are recorded as a receivable on the Operating Partnership's balance sheet but are eliminated on the Company's Consolidated Balance Sheet, since both this entity and the Operating Partnership are fully consolidated by the Company.

We believe combining the Company's and Operating Partnership's quarterly reports into this single report results in the following benefits:

•enhances investors' understanding of the Company and the Operating Partnership by enabling them to view the business as a whole and in the same manner as management views and operates the business;

•creates time and cost efficiencies through the preparation of one combined report instead of two separate reports; and

•eliminates duplicative disclosures and provides a more streamlined and readable presentation since a substantial portion of the Company's disclosure applies to both the Company and the Operating Partnership.

To help investors understand the differences between the Company and the Operating Partnership, this report provides the following disclosures for each of the Company and the Operating Partnership:

•Consolidated Financial Statements;

•a single set of consolidated notes to such financial statements that includes separate discussions of each entity's equity or partners' capital, as applicable; and

•a combined Management's Discussion and Analysis of Financial Condition and Results of Operations section that includes distinct information related to each entity.

This report also includes separate Part I, Item 4, Controls and Procedures sections and separate Exhibit 31 and 32 certifications for the Company and the Operating Partnership in order to establish that the requisite certifications have been made and that the Company and the Operating Partnership are both compliant with Rule 13a-15 and Rule 15d-15 of the Securities Exchange Act of 1934, as amended, and 18 U.S.C. §1350.

FIRST INDUSTRIAL REALTY TRUST, INC. AND FIRST INDUSTRIAL, L.P.

FORM 10-Q

FOR THE PERIOD ENDED SEPTEMBER 30, 2026

INDEX