iShares Paris-Aligned Climate MSCI USA ETF (PABU) is an exchange-traded fund that seeks to track the investment results of the MSCI USA Climate Paris Aligned Benchmark Extended Select Index, composed of U.S. large- and mid-capitalization stocks designed to align with the Paris Agreement objectives by following a decarbonization trajectory, reducing exposure to climate-related transition and physical risks, and increasing investments in companies positioned for a low-carbon economy transition. The ETF offers investors exposure to a diversified portfolio of approximately 178-179 holdings across sectors such as information technology (approximately 39.9%), financials, and healthcare; top holdings include Nvidia Corp., Microsoft Corp., and Apple Inc., which together with the top 10 positions account for around 45-47% of assets under management; it provides quarterly distributions, with recent payouts including $0.2489 per share and total dividends of $0.4091 in 2025 year-to-date. Managed by BlackRock, Inc. through its iShares division with an expense ratio of 0.10%, PABU primarily serves institutional and retail investors targeting sustainable U.S. equity strategies and operates on the Nasdaq exchange with assets under management exceeding $2.2 billion. Launched on February 8, 2022, the ETF reflects BlackRock's headquarters in New York City and global reach via offices including Chicago, San Francisco, London, and Paris. In recent developments, PABU has maintained steady portfolio adjustments through routine 13F and NPORT-P filings, including minor position trims such as a 3.46% reduction in Revvity Inc. shares as of November 30, 2024, alongside continued alignment with evolving MSCI climate methodologies and strong performance metrics like 11.15% YTD gains and 10.89% one-year returns as of late 2025.