Thrivent Mid Cap Stock Fund Class S (TMSIX) is an open-end equity mutual fund managed by Thrivent Asset Management, LLC that seeks long-term capital growth by investing at least 80% of its net assets in equity securities of mid-sized U.S. companies, typically those with market capitalizations within the range of the Russell Midcap Index or S&P MidCap 400 Index; the fund employs a blend strategy incorporating both growth stocks, which exhibit above-average earnings growth potential, and value stocks, trading at discounts to their fundamentals as measured by price-to-earnings and other valuation ratios; it utilizes fundamental and quantitative analysis for stock selection across diversified sectors while benchmarking performance against the Russell Midcap Index and S&P MidCap 400 Index. The fund, originally formed on June 30, 1993, is domiciled in the United States and headquartered in Minneapolis, Minnesota, as part of Thrivent, a membership-owned fraternal financial services organization with over $194 billion in total assets under management. Total net assets stand at approximately $3.34 billion, with a portfolio featuring top holdings such as Steel Dynamics Inc. (3.51%), Trimble Inc. (3.09%), Garmin Ltd. (2.68%), Rockwell Automation Inc. (2.64%), and Arch Capital Group Ltd. (2.50%); the fund distributes dividends annually and long-term capital gains, with an expense ratio of 0.74% and no sales loads. Managed by lead portfolio manager Brian Flanagan since 2004, alongside Vikram Kaura and J.P. McKim since May 2022, the fund targets investors seeking competitive mid-cap blend exposure with risk monitoring. In recent developments, Thrivent has pursued strategic expansions including a structured financing transaction with Dawson in October 2025 to bolster its private equity strategy in lower-middle and middle-market segments, alongside a May 2025 debt issuance of $1.2 billion backed by fund-of-funds cash flows to enhance liquidity; while not directly involving TMSIX, Thrivent announced in November 2025 the conversion of its separate Mid Cap Value Fund and Core Small Cap Value Fund into ETFs, signaling a broader shift toward exchange-traded products exceeding $1 billion in assets under management.