Key Takeaways
- • Blackstone Infrastructure Partners acquired a 19.9% stake in NIPSCO for $2.16 billion in June 2024, establishing the firm's largest direct utility investment ahead of its pending full acquisition of TXNM Energy, the parent company of PNM (New Mexico) and TNMP (Texas).
- • Blackstone's $11.5 billion acquisition of TXNM Energy at $61.25 per share (announced May 2025) remains pending regulatory approval from state utility commissions in New Mexico and Texas, with over 800,000 customers awaiting decision on whether private equity ownership is in their interest.
- • NIPSCO serves as a live case study for TXNM stakeholders: the 1.4 million-customer Indiana utility is already experiencing criticism around rate hikes and affordability pressure following Blackstone's minority stake acquisition, raising concerns about Blackstone's track record on cost control for ratepayers.
- • Blackstone leverages its portfolio position across utilities (NIPSCO, FirstEnergy) and renewables (Invenergy, the largest private renewables developer in the U.S.) as evidence of sector expertise, claiming this investment depth will benefit TXNM customers through modernization and renewable energy transition funding.
- • Consumer advocacy groups and regulators are scrutinizing the affordability implications of private equity utility ownership during an ongoing national affordability crisis, with NIPSCO's post-acquisition performance serving as a critical reference point for regulators evaluating TXNM approval.
Summary
Blackstone is seeking regulatory approval to acquire TXNM Energy, the parent company of Public Service Company of New Mexico (PNM) and Texas-New Mexico Power Company (TNMP), in a transaction valued at $11.5 billion at $61.25 per share. The announcement came in May 2025, but the deal remains pending state regulatory approval from utility commissions in New Mexico and Texas. Over 800,000 customers across both utilities are awaiting a regulatory decision on whether to permit private equity ownership of their essential electric service infrastructure.
To assess what TXNM customers might expect under Blackstone ownership, stakeholders are closely examining the firm's existing utility investments. Blackstone Infrastructure Partners acquired a 19.9% minority stake in Northern Indiana Public Service Company (NIPSCO) for $2.16 billion in June 2024. NIPSCO is the largest of Blackstone's utility holdings, serving 1.4 million electric and gas customers across Indiana. At the time of the NIPSCO investment, the utility publicly stated it intended to use Blackstone's capital to modernize gas and electric transmission systems and replace coal-fired generation with renewable energy resources. However, NIPSCO has subsequently faced mounting criticism around rate increases and affordability pressures on its customer base, creating concerns about whether Blackstone's ownership model prioritizes cost control.
In its application to acquire TXNM, Blackstone emphasizes its portfolio strength within the power and utility sector, citing investments in FirstEnergy, NIPSCO, and Invenergy (described as the largest private renewables developer in the United States). The firm argues this combination of holdings and sector experience will benefit TXNM customers. However, NIPSCO's post-acquisition rate environment suggests a different trajectory. Consumer advocacy groups and regulatory bodies are raising questions about whether Blackstone's private equity model adequately protects ratepayer affordability—a critical concern given the broader national affordability crisis affecting utility customers. Regulators are using NIPSCO's experience as a benchmark for evaluating whether to approve the TXNM transaction.
To assess what TXNM customers might expect under Blackstone ownership, stakeholders are closely examining the firm's existing utility investments. Blackstone Infrastructure Partners acquired a 19.9% minority stake in Northern Indiana Public Service Company (NIPSCO) for $2.16 billion in June 2024. NIPSCO is the largest of Blackstone's utility holdings, serving 1.4 million electric and gas customers across Indiana. At the time of the NIPSCO investment, the utility publicly stated it intended to use Blackstone's capital to modernize gas and electric transmission systems and replace coal-fired generation with renewable energy resources. However, NIPSCO has subsequently faced mounting criticism around rate increases and affordability pressures on its customer base, creating concerns about whether Blackstone's ownership model prioritizes cost control.
In its application to acquire TXNM, Blackstone emphasizes its portfolio strength within the power and utility sector, citing investments in FirstEnergy, NIPSCO, and Invenergy (described as the largest private renewables developer in the United States). The firm argues this combination of holdings and sector experience will benefit TXNM customers. However, NIPSCO's post-acquisition rate environment suggests a different trajectory. Consumer advocacy groups and regulatory bodies are raising questions about whether Blackstone's private equity model adequately protects ratepayer affordability—a critical concern given the broader national affordability crisis affecting utility customers. Regulators are using NIPSCO's experience as a benchmark for evaluating whether to approve the TXNM transaction.
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