There are many companies in the finance field, including:

1. Banks: JPMorgan Chase, Bank of America, Wells Fargo, Citigroup, US Bancorp, PNC Financial Services, Capital One, TD Bank, BB&T, American Express
2. Investment banks: Goldman Sachs, Morgan Stanley, JPMorgan Chase, Citigroup, Bank of America Merrill Lynch, Wells Fargo Securities, Deutsche Bank, Barclays, UBS
3. Asset management companies: BlackRock, Vanguard, State Street, Fidelity, T. Rowe Price, Invesco, Charles Schwab, Northern Trust
4. Insurance companies: Berkshire Hathaway, Prudential, MetLife, Allstate, AIG, Chubb, Travelers, Aflac
5. Credit card companies: American Express, Visa, Mastercard, Discover, Capital One
6. Online lending platforms: LendingClub, Prosper, SoFi, Upstart, Avant
7. Payment companies: PayPal, Square, Stripe, Adyen
8. Stock exchanges: NYSE, NASDAQ, CME Group, ICE, LSE, SSE, HKEX
9. Hedge funds: Bridgewater Associates, AQR Capital Management, Millennium Management, Two Sigma Investments, Renaissance Technologies
10. Private equity firms: Blackstone, KKR, Carlyle Group, Apollo Global Management, TPG Capital

11. Financial advisory firms: Edward Jones, Charles Schwab, Raymond James, Ameriprise Financial, UBS
12. Credit rating agencies: S&P Global, Moody’s, Fitch Ratings
13. Real estate investment trusts (REITs): Simon Property Group, Prologis, Public Storage, American Tower, Digital Realty Trust
14. Mutual fund companies: American Funds, T. Rowe Price, Fidelity, Vanguard, Invesco
15. Online brokers: Robinhood, TD Ameritrade, E-Trade, Charles Schwab, Interactive Brokers
16. Financial technology (fintech) companies: Robinhood, Square, Stripe, PayPal, SoFi, LendingClub, TransferWise, Chime, Robinhood
17. Consumer finance companies: GE Capital, Discover Financial Services, OneMain Financial, Marcus by Goldman Sachs
18. Foreign exchange companies: XE.com, OFX, TransferWise, WorldFirst
19. Financial data and analytics firms: Bloomberg, Thomson Reuters, S&P Global Market Intelligence, FactSet
20. Crowdfunding platforms: Kickstarter, GoFundMe, Indiegogo, Lending Club.

These are just a few examples of companies in the finance field area, there are many more around the world. Each company has its own unique products and services, and they may also operate in different regions, It’s important to research each company to understand their specific business model and offerings.