Organization	9 Months Ended
Sep. 30, 2025
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization	Note 1 — Organization Apartment Investment and Management Company (“Aimco” or “the Company”), a Maryland corporation, is a self-administered and self-managed real estate investment trust (“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 September 30, 2025, Aimco owned 94.1% of the legal interest in the common partnership units of Aimco Operating Partnership and 96.6% of the economic interest in Aimco Operating Partnership. The remaining 5.9% legal interest is owned by limited partners. As the sole general partner of Aimco Operating Partnership, Aimco has exclusive control of Aimco Operating Partnership’s day-to-day management. This filing combines the quarterly reports on Form 10-Q for the quarterly period ended September 30, 2025, of Aimco and Aimco Operating Partnership. Where it is important to distinguish between the two entities, each is referred to specifically. Otherwise, references to “we,” “us,” or “our” mean, collectively, Aimco, Aimco Operating Partnership, and their consolidated entities. We own or lease a portfolio of real estate investments focused primarily on the U.S. multifamily sector. At September 30, 2025, our entire portfolio of operating residential apartment communities includes 2,524 apartment homes within 15 consolidated stabilized operating properties, a complete 689-unit community with 105,000 square feet of retail space, a complete 220-unit community, and four unconsolidated properties. Additionally, we have a completed single family rental community with 16 homes and eight accessory dwelling units, a waterfront ground-up development under construction with 114 planned units, a 106-key luxury hotel with event space, one commercial office building that is part of an assemblage with an adjacent apartment building that is currently held for sale (together referred to as the “Brickell Assemblage”), one operating property held for sale, and land parcels held for development. In addition, we hold other alternative investments, including our Mezzanine Investment, our investment in IQHQ Holdings, LP (“IQHQ”), and our investment in real estate technology funds. See Note 2 for further information regarding our Mezzanine Investment and our investment in IQHQ.

Organization

9 Months Ended

Sep. 30, 2025

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Note 1 — Organization

Apartment Investment and Management Company (“Aimco” or “the Company”), a Maryland corporation, is a self-administered and self-managed real estate investment trust (“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 September 30, 2025, Aimco owned 94.1% of the legal interest in the common partnership units of Aimco Operating Partnership and 96.6% of the economic interest in Aimco Operating Partnership. The remaining 5.9% legal interest is owned by limited partners. As the sole general partner of Aimco Operating Partnership, Aimco has exclusive control of Aimco Operating Partnership’s day-to-day management.

This filing combines the quarterly reports on Form 10-Q for the quarterly period ended September 30, 2025, of Aimco and Aimco Operating Partnership. Where it is important to distinguish between the two entities, each is referred to specifically. Otherwise, references to “we,” “us,” or “our” mean, collectively, Aimco, Aimco Operating Partnership, and their consolidated entities.

We own or lease a portfolio of real estate investments focused primarily on the U.S. multifamily sector. At September 30, 2025, our entire portfolio of operating residential apartment communities includes 2,524 apartment homes within 15 consolidated stabilized operating properties, a complete 689-unit community with 105,000 square feet of retail space, a complete 220-unit community, and four unconsolidated properties. Additionally, we have a completed single family rental community with 16 homes and eight accessory dwelling units, a waterfront ground-up development under construction with 114 planned units, a 106-key luxury hotel with event space, one commercial office building that is part of an assemblage with an adjacent apartment building that is currently held for sale (together referred to as the “Brickell Assemblage”), one operating property held for sale, and land parcels held for development. In addition, we hold other alternative investments, including our Mezzanine Investment, our investment in IQHQ Holdings, LP (“IQHQ”), and our investment in real estate technology funds. See Note 2 for further information regarding our Mezzanine Investment and our investment in IQHQ.