Ranking:

1. #1 Highest Turnover: Amazon
   • Why: Driven by high turnover in fulfillment, intense performance management, and a stock-vesting structure backloaded into Years 3 and 4, causing many employees to depart early.
2. #2 Tesla
   • Why: Demanding operational schedules, lower base cash salaries relative to pure software firms, and rapid organizational shifts drive frequent employee turnover.
3. #3 Meta
   • Why: High-stakes performance reviews (“stack ranking”) and aggressive performance management result in steady voluntary and involuntary exits.
4. #4 Google
   • Why: High baseline stability, though mid-level engineers frequently leave to found startups or take executive roles at smaller firms.
5. #5 Apple
   • Why: Moderate turnover; brand prestige and steady compensation keep retention relatively high.
6. #6 Microsoft
   • Why: Known for steady work-life balance and strong internal transfer opportunities, leading to high employee retention.
7. #1 Lowest Turnover: Nvidia
   • Why: Exceptional stock gains, high employee morale, and market leadership in AI hardware give Nvidia the best employee retention rate among tech giants.