Global tensions remain high in 2025. Russia's invasion of Ukraine has dragged on for more than three years in a grinding war of attrition. Israel continues its military campaign in Gaza, and alongside the U.S., has carried out surgical strikes targeting Iran's nuclear sites and regime leadership.
Governments around the world have taken notice and acted. In late June, NATO, a military alliance of 32 countries including the U.S., Canada and most of Europe, held a periodic summit in The Hague.
Member nations agreed to significantly boost defense spending targets from the traditional 2% of gross domestic product (GDP) to 5%.
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This was likely influenced by ongoing concerns about Russian President Vladimir Putin's expansionist ambitions, alongside renewed pressure from a second Trump administration that has been vocally critical about America's outsized role in NATO.
Together, these developments have created strong tailwinds for aerospace and defense ETFs, which have attracted significant inflows in 2024 and 2025.
Some investors are using these exchange-traded funds as a hedge against geopolitical instability, while others see them as a way to benefit from a surge in global military spending.
But not all aerospace and defense ETFs are created equal. Before you invest, it's important to understand how each fund selects and weights its holdings, because those choices can drive very different performance outcomes.
What goes into an aerospace and defense ETF?
Aerospace and defense ETFs might sound like a narrow niche, but their holdings can be surprisingly diverse. These funds aren't just filled with companies that make fighter jets and missiles, though those are certainly represented.
The industry actually includes a wide mix of manufacturers, suppliers, service providers and contractors that support defense and aerospace operations in different ways.
A large portion of most defense ETFs is typically allocated to major prime contractors, which are the big companies that build complete weapons systems and platforms. The "Big 5" include:
Lockheed Martin (LMT), maker of the F-35 fighter jet, Black Hawk helicopters and HIMARS rocket systems.
RTX (RTX), formerly Raytheon, produces the Patriot missile defense system, as well as the Tomahawk cruise missile.
Northrop Grumman (NOC) is responsible for the B-21 Raider stealth bomber and various missile defense systems.
Boeing (BA) supplies military aircraft like the F/A-18 Super Hornet and the AH-64 Apache attack helicopter.
General Dynamics (GD) builds Abrams tanks, Stryker armored vehicles and Virginia-class nuclear submarines.
These companies dominate U.S. defense procurement and lobbying efforts. They design and deliver the complete platforms that make up much of modern militaries' arsenals.
But many other aerospace and defense firms play a more specialized role, supplying key components rather than full systems. For example:
GE Aerospace (GE) primarily manufactures jet engines for both military and commercial aircraft.
L3Harris Technologies (LHX) focuses on defense electronics, communications systems and space sensors.
TransDigm Group (TDG) supplies highly engineered aircraft components such as actuators, ignition systems and cockpit controls used in both military and commercial platforms.
Some major names in the space aren't pure plays. They may be large industrial conglomerates with a significant, but not exclusive, focus on defense.
Honeywell International (HON) is a good example. While it provides avionics, navigation and surveillance systems to the military, it also has major operations in industrial automation and building technologies.
Aerospace and defense exposure isn't limited to the U.S., either. Europe is in the midst of a rearmament push, and many regional contractors are drawing more investor attention:
Rheinmetall (Germany) makes tanks, artillery and ammunition systems.
Leonardo (Italy) supplies helicopters, aircraft and electronics.
Saab (Sweden) produces the Gripen fighter jet and radar systems.
Dassault Aviation (France) builds the Rafale multirole combat aircraft.
BAE Systems (U.K.) offers a wide portfolio spanning land, sea, air and cyber.
Some aerospace and defense ETFs may cast the net even wider by including cybersecurity, surveillance and intelligence contractors. These firms don't manufacture physical weapons, but play an increasingly vital role in modern defense:
Booz Allen Hamilton (BAH) provides consulting and technology solutions to the Pentagon and intelligence agencies.
Palantir Technologies (PLTR) develops data analytics platforms used for military intelligence, targeting and situational awareness.
Depending on the ETF, the definition of "defense" can stretch beyond tanks and aircraft to include the digital backbone of national security. That's why it pays to look closely at what each fund actually holds.
How we chose the best aerospace and defense ETFs
We started by excluding leveraged and inverse ETFs, which are designed for short-term trading and are not suitable for long-term investors. We focused only on long-only funds that offer unleveraged exposure to the aerospace and defense sector.
To ensure cost efficiency and ease of trading, we capped expense ratios at 0.60% and required a 30-day median bid-ask spread below 0.25%. We also set a minimum $500 million in assets under management (AUM) to reduce the risk of fund closure and ensure sufficient scale and investor interest.
These screens helped us identify funds that are reasonably priced, liquid and built to last. These are key attributes for anyone looking to invest in the long-term trends driving defense and aerospace spending.
iShares U.S. Aerospace & Defense ETF
- Assets under management: $8.3 billion
- Expense ratio: 0.40%
- 30-day median bid-ask spread: 0.03%
The iShares U.S. Aerospace & Defense ETF (ITA) has one of the longest track records in the category, having launched in May 2006.
It tracks the Dow Jones U.S. Select Aerospace & Defense Index and holds a concentrated portfolio of 38 domestic companies. Due to its size and longevity, it's often considered the default option for many investors in this space.
However, ITA is market cap-weighted, which creates notable imbalances. GE Aerospace makes up 20.7% of the portfolio, followed by RTX at 14.7% and Boeing at 8.8%.
After that, allocations drop off quickly, with Howmet Aerospace (HWM) being the fourth-largest holding at just 4.7%.
Learn more about ITA at the iShares provider site.
Invesco Aerospace & Defense ETF
- Assets under management: $5.7 billion
- Expense ratio: 0.57%
- 30-day median bid-ask spread: 0.05%
The Invesco Aerospace & Defense ETF (PPA) tracks the SPADE Defense Index, a bespoke benchmark developed by a defense-focused analyst firm rather than a major index provider.
While the index has historical data going back to December 1997, PPA itself launched in October 2005, giving it a slightly longer track record than ITA.
PPA uses a modified market-cap weighting approach that limits the influence of the largest companies. This helps avoid overexposure to diversified firms where defense is just one business segment, resulting in a more balanced portfolio.
While it shares many holdings with ITA, it is notably less top-heavy.
Learn more about PPA at the Invesco provider site.
SPDR S&P Aerospace & Defense ETF
- Assets under management: $3.6 billion
- Expense ratio: 0.35%
- 30-day median bid-ask spread: 0.06%
The SPDR S&P Aerospace & Defense ETF (XAR) tracks the S&P Aerospace & Defense Select Industry Index.
Instead of being weighted by market cap, XAR's benchmark uses an equal-weight methodology that gives each holding roughly the same allocation regardless of size. This reduces concentration risk and prevents the biggest contractors from dominating the portfolio.
XAR currently holds 36 companies, with the top positions reflecting recent outperformers between rebalancing cycles.
Its equal weighting also increases exposure to mid- and small-cap stocks, which tend to be more concentrated in the aerospace segment than pure defense.
Learn more about XAR at the SPDR provider site.
Global X Defense Tech ETF
- Assets under management: $3.0 billion
- Expense ratio: 0.50%
- 30-day median bid-ask spread: 0.05%
The Global X Defense Tech ETF (SHLD) launched in September 2023 and quickly gained traction, posting a 64% annualized return since inception as of June 30, 2025.
SHLD tracks the proprietary Global X Defense Tech Index, which takes a broader approach than traditional aerospace-heavy ETFs such as ITA, PPA or XAR. Rather, it focuses more on military hardware and defense technology than on commercial aerospace.
Common holdings with ITA, PPA and XAR include names such as Lockheed Martin, RTX and General Dynamics. But SHLD expands beyond the U.S., with exposure to European defense firms such as Leonardo, Rheinmetall and Thales.
Notably, it has a strong focus on intelligence, with Palantir Technologies coming in as its third-largest holding.
Learn more about SHLD at the Global X provider site.
Select STOXX Europe Aerospace & Defense ETF
- Assets under management: $1.0 billion
- Expense ratio: 0.50%
- 30-day median bid-ask spread: 0.10%
The Select STOXX Europe Aerospace & Defense ETF (EUAD) offers an internationally focused alternative to U.S.-centric funds such as ITA, PPA, or XAR.
It tracks the STOXX Europe Total Market Aerospace & Defense Index and includes only European-listed companies or American depositary receipts (ADRs) that generate at least 50% of their revenue from aerospace and defense.
EUAD is filled with top European competitors including Airbus, Rheinmetall, BAE Systems, Thales and Leonardo. Rolls-Royce is also among its holdings, which, in addition to its automotive legacy, is a major manufacturer of aircraft engines.
Through June 30, the fund is up 78% year to date, driven by strong inflows amid growing interest in Europe's rearmament efforts.
Learn more about EUAD at the STOXX provider site.
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