iShares Core S&P Mid-Cap ETF (IJH) Top 25 Holdings

The iShares Core S&P Mid-Cap ETF (IJH) is one of the most popular ways to get exposure to America’s mid-sized companies. Tracking the S&P MidCap 400 Index, IJH invests in firms that are too big to be considered small caps but not yet in the mega-cap league. These companies often represent the “sweet spot” of growth and stability, with more room to expand than large caps and stronger balance sheets than smaller players.

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As of September 2025, IJH holds hundreds of companies across various sectors, with its top 25 names accounting for approximately 14% of the total fund. That makes IJH a more balanced and diversified ETF than many large-cap funds, where the top 10 can dominate. For investors, this means that no single company makes or breaks the ETF, sector strength and broad market trends tend to drive performance.

Within the portfolio, though, certain names stand out. Comfort Systems USA, Pure Storage, and Flex are among the top holdings, representing the industrial, tech, and manufacturing strength of the mid-cap segment. In this breakdown, we’ll look at IJH’s top 25 holdings and dive deeper into these three companies to see how they fit into the fund’s strategy.

1. Comfort Systems USA (FIX)

Comfort Systems USA may not be a household name, but it’s a leader in mechanical services like heating, ventilation, and air conditioning (HVAC). The company has benefited from demand for energy-efficient building systems and infrastructure upgrades. With projects spanning hospitals, schools, and industrial facilities, its recurring service work adds resilience to earnings.

The mid-cap edge here comes from scale, as Comfort Systems is big enough to win national contracts but still small enough to post double-digit growth as it expands. As construction activity remains strong in both public and private sectors, FIX has carved out a steady role in IJH as an industrials play that blends growth with defensiveness.

For IJH, Comfort Systems provides sector diversification while reinforcing the fund’s strength in cyclical yet durable industries. Investors looking for steady exposure to the “picks and shovels” of infrastructure will find FIX’s inclusion meaningful.

2. Pure Storage (PSTG)

Pure Storage is one of the most innovative companies in the data storage space, challenging legacy players with its all-flash storage systems. Its products help enterprises modernize their data centers, offering speed, reliability, and energy efficiency that spinning-disk incumbents can’t match. As cloud and AI workloads surge, Pure’s solutions are increasingly in demand.

The company has been scaling fast, with annual revenue growth consistently in the double digits. Subscription-based services like Evergreen and Pure as-a-Service add recurring revenue streams, giving investors more confidence in its long-term trajectory. This blend of high growth and an improving margin profile is why PSTG has become a standout in IJH’s lineup.

For the ETF, Pure Storage highlights how mid-cap tech can capture growth trends before they’re fully priced in at the large-cap level. Its presence adds a layer of innovation-driven upside potential to the broader fund.

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3. Flex LTD (FLEX)

Flex Ltd is a global contract manufacturer with operations across electronics, healthcare, and industrial sectors. Flex plays a crucial behind-the-scenes role in assembling products for some of the world’s biggest brands. Its scale allows it to compete on cost while diversifying across multiple industries to manage cyclicality.

Recent moves into electric vehicle supply chains and medical devices underscore its strategy to stay relevant in high-growth markets. Flex’s ability to adapt, whether in consumer electronics, automotive, or industrial solutions, makes it a steady contributor to IJH’s performance.

For investors, Flex adds international reach and operational balance to the ETF. It’s an example of how mid-caps can quietly thrive in the background, delivering solid returns without the spotlight of mega-cap peers.

What You Should Own IJH

IJH is designed to capture the growth potential of mid-cap companies while maintaining a diversified risk profile across hundreds of holdings. Unlike mega-cap ETFs, no single stock dominates here, as the largest positions account for less than 1% of the assets. That balance makes IJH an attractive “core” holding for investors who want diversification across sectors and companies still early in their growth curve.

At the same time, the ETF’s top 25 holdings offer a glimpse into which mid-caps are setting the pace. From industrial infrastructure (Comfort Systems) to disruptive tech (Pure Storage) to global manufacturing (Flex), IJH balances cyclical exposure with innovation-driven upside.

Key Insights

• Broad diversification. No single stock accounts for more than 1% of the fund, thereby reducing concentration risk.
• Mid-cap growth profile. Companies often have more runway than large caps but greater stability than small caps.
• Sector balance. Strong representation across industrial, tech, healthcare, and consumer sectors makes IJH less vulnerable to shocks from a single industry.

Why IJH Is Right For Healthcare Investment

The iShares Core S&P Mid-Cap ETF (IJH) captures a powerful slice of the U.S. equity market that often gets overlooked. While investors tend to focus on either small-cap growth stories or large-cap giants, mid-caps combine the best of both worlds: growth potential and operational stability.

With top holdings like Comfort Systems, Pure Storage, and Flex, IJH demonstrates how mid-caps can thrive by capitalizing on sector trends ranging from infrastructure upgrades to AI-driven data needs. The fund’s broad diversification also makes it less volatile than more concentrated ETFs, appealing to investors who want steady exposure to U.S. corporate growth.

For long-term portfolios, IJH is a reminder that the “middle of the market” can be a sweet spot. If large caps dominate headlines and small caps bring high risk, mid-caps, through IJH, offer a balanced way to participate in America’s growth story.

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Disclaimer:

Please note that the articles on TIKR are not intended to serve as investment or financial advice from TIKR or our content team, nor are they recommendations to buy or sell any stocks. We create our content based on TIKR Terminal’s investment data and analysts’ estimates. Our analysis might not include recent company news or important updates. TIKR has no position in any stocks mentioned. Thank you for reading, and happy investing!