iShares LifePath Target Date 2040 ETF (ITDD) is an actively managed exchange-traded fund that seeks to provide retirement outcomes for investors anticipating retirement around 2040 through exposure to a broad, dynamically allocated portfolio of underlying iShares equity, fixed income, and money market ETFs; the fund follows a glide path that shifts from higher equity exposure in early years to greater fixed income and conservative allocations as the target date approaches, including holdings such as iShares Core S&P 500 ETF, iShares Core MSCI Total International Stock ETF, iShares Core U.S. Aggregate Bond ETF, iShares iBoxx $ Investment Grade Corporate Bond ETF, and iShares Core U.S. REIT ETF. Launched on October 17, 2023, and listed on NYSE Arca with CUSIP 46438G794, ITDD maintains a low expense ratio of 0.11%, comprising acquired fund fees and expenses with no management fee, and targets retail investors lacking access to employer-sponsored retirement plans, including gig and part-time workers. The ETF operates primarily in the United States market as part of BlackRock Inc.'s iShares LifePath series, managed by BlackRock Fund Advisors from its headquarters in New York. In November 2024, BlackRock executed a tax-free reorganization whereby the iShares LifePath Retirement ETF acquired substantially all assets and liabilities of the iShares LifePath Target Date 2025 ETF, demonstrating ongoing portfolio optimization within the LifePath suite, while the broader series saw expansion with the launch of the iShares LifePath Target Date 2070 ETF in November 2024. As of late 2025, ITDD reports net assets around $36-39 million, a 30-day SEC yield of approximately 2.39%, and year-to-date total returns exceeding 14%, with 13-15 holdings representing diversified sectors like technology, financials, energy, and real estate.