APARTMENT INVESTMENT & MANAGEMENT CO

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-Q

(Mark One)

For the quarterly period ended June 30,2026

OR

For the transition period from to

Commission File Number:1-13232 (Apartment Investment and Management Company)

Commission File Number:0-56223 (Aimco OP L.P.)

Apartment Investment and Management Company

Aimco OP L.P.

(Exact name of registrant as specified in its charter)

(833)373-1300

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address, and former fiscal year, if changed since last report)

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

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

None (Apartment Investment and Management Company)

Partnership Common Units (Aimco OP L.P.)

(title of each class)

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, a 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.

Apartment Investment and Management Company:

Aimco OP L.P.:

f

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).

The number of shares of Apartment Investment and Management Company Class A common stock (“Common Stock”) outstanding as of August 5, 2026:145,236,898

EXPLANATORY NOTE

Apartment Investment and Management Company (“Aimco” or “the Company”), a Maryland corporation, is a self-administered and self-managed real estate investment trust, or REIT. On December 15, 2020, Aimco completed the separation of its businesses (the “Separation”), creating two, separate and distinct, publicly traded companies, Aimco and Apartment Income REIT Corp. (“AIR”) (Aimco and AIR together, as they existed prior to the Separation, “Aimco Predecessor”). Events noted in this filing as occurring before December 15, 2020, were those entered into by Aimco Predecessor.

Aimco, through a wholly-owned subsidiary, is the general partner and is, directly, the special limited partner of Aimco OP L.P. (“Aimco Operating Partnership”). As of June 30, 2026, Aimco owned 95.1% of the legal interest in the common partnership units of Aimco Operating Partnership and 95.8% of the dilutive economic interest in Aimco Operating Partnership. The remaining 4.9% legal interest is owned by limited partners. The common partnership units of Aimco Operating Partnership are referred to as “OP Units”. As the sole general partner of Aimco Operating Partnership, Aimco has exclusive control of Aimco Operating Partnership’s day-to-day management.

Aimco Operating Partnership holds all of Aimco’s assets and manages the daily operations of Aimco’s business. Pursuant to the Aimco Operating Partnership Agreement, Aimco is required to contribute to Aimco Operating Partnership all proceeds from the offerings of its securities. In exchange for the contribution of such proceeds, Aimco receives additional interests in Aimco Operating Partnership with similar terms (e.g., if Aimco contributes proceeds of a stock offering, Aimco receives partnership units with terms substantially similar to the stock issued by Aimco).

This filing combines the quarterly reports on Form 10-Q for the quarterly period ended June 30, 2026, of Aimco and Aimco Operating Partnership. Where it is important to distinguish between the two entities, we refer to them specifically. Otherwise, references to “we,” “us,” or “our” mean, collectively, Aimco, Aimco Operating Partnership, and their consolidated entities.

We believe combining the periodic reports of Aimco and Aimco Operating Partnership into this single report provides the following benefits:

•

We present our business as a whole, in the same manner our management views and operates the business;

•

We eliminate duplicative disclosure and provide a more streamlined and readable presentation because a substantial portion of the disclosures apply to both Aimco and Aimco Operating Partnership; and

•

We save time and cost through the preparation of a single combined report rather than two separate reports.

We operate Aimco and Aimco Operating Partnership as one enterprise; the management of Aimco directs the management and operations of Aimco Operating Partnership; and Aimco OP GP, LLC, Aimco Operating Partnership’s general partner, is managed by Aimco.

We believe it is important to understand the few differences between Aimco and Aimco Operating Partnership in the context of how Aimco and Aimco Operating Partnership operate as a consolidated company. Aimco has no assets or liabilities other than its investment in Aimco Operating Partnership. Also, Aimco is a corporation that has issued publicly traded equity from time to time, whereas Aimco Operating Partnership is a partnership that has no publicly traded equity. Except for the net proceeds from stock offerings by Aimco, which are contributed to Aimco Operating Partnership in exchange for additional limited partnership interests (of a similar type and in an amount equal to the shares of stock sold in the offering), Aimco Operating Partnership generates all remaining capital required by its business. These sources include Aimco Operating Partnership’s working capital, net cash provided by operating activities, the issuance of debt and equity securities, including additional partnership units, and proceeds received from the sale of real estate.

Prior to the adoption of the plan of sale and liquidation of Aimco and its subsidiaries (the “Plan of Sale and Liquidation”), equity, partners’ capital, and noncontrolling interests were the main areas of difference between the condensed consolidated financial statements of Aimco and those of Aimco Operating Partnership. Interests in Aimco Operating Partnership held by entities other than Aimco were classified within partners’ capital in Aimco Operating Partnership’s condensed consolidated financial statements and as noncontrolling interests in Aimco’s condensed consolidated financial statements.

After the adoption of the Plan of Sale and Liquidation, the allocations of net assets in liquidation are the main areas of difference between the condensed consolidated financial statements of Aimco and those of Aimco Operating Partnership. Net assets in liquidation allocated to interests in Aimco Operating Partnership held by entities other than Aimco are classified within Net assets in liquidationin Aimco Operating Partnership’s condensed consolidated financial statements and classified within Net assets in liquidation attributable to noncontrolling interests in Aimco Operating Partnershipin Aimco’s condensed consolidated financial statements.

To help investors understand the differences between Aimco and Aimco Operating Partnership, this report provides: separate condensed consolidated financial statements for Aimco and Aimco Operating Partnership; a single set of condensed consolidated notes to such financial statements that includes separate discussions of each entity’s stockholders’ equity or partners’ capital, and earnings per share or earnings per unit, as applicable; and a combined Management’s Discussion and Analysis of Financial Condition and Results of Operations section that includes discrete information related to each entity, where appropriate.

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

TABLE OFCONTENTS

FORM 10-Q