With 2018 fast upon us, we can’t help but look back on the past 12 months, a year that was a whirlwind politically, socially, culturally, and economically.

While the U.S. dealt with everything from natural disasters and gun violence to protests about racial inequality and the sexual harassment reckoning, the stock market reached extraordinary highs.

The market hit 62 daily all-time highs in 2017, notes CNBC, and the S&P 500 has returned almost 20% so far. And, the top performing sector, technology, which is up around 38% year-to-date, surpassed the worst-performing sectors (energy and telecom) by over 43 percentage points.

Even with this overall positive economic sentiment, which has gotten a big boost from the new tax bill, merger and acquisition activity in 2017 has been relatively quiet; deals were down 35% year-to-date through mid-November.

The deals that were announced, though, were major, and revolved around some of the biggest consumer and technology names. Here are 15 of the best mergers and acquisitions of 2017.

1. Amazon Buys Whole Foods

Earlier this summer, e-commerce giant Amazon (AMZN – Free Report) announced that it would be buying high-end organic grocery chain Whole Foods for $13.7 billion; the deal officially closed at the end of August. While the acquisition has been off to a rocky start, it gives Amazon hundreds of physical stores and provides the company a strong entryway into the competitive grocery and food industry.

2. Intel Acquires Mobileye

Intel INTC said in August that it had completed its tender offer for the outstanding shares of Mobileye, a company that develops sensors and cameras for Advanced Driver Assisted Systems (ADAS); the Israel-based company is also known for its computer vision and machine learning technology. The $15.3 billion deal gives Intel a huge advantage in the growing self-driving car industry, a market they estimate will grow to $70 billion annually by 2030.

3. United Technologies Buys Rockwell Collins