How Do I Buy Stocks in the Philippines?

First step is to choose a stockbroker. The broker will represent you in the stock market (plus other services such as advice on your investments and reports about the market). As of March 12, 2019,  here's a list of online brokers or trading participants who are authorized and qualified to trade stocks or securities for you:

1. AAA Southeast Equities, Inc.
2. AB Capital Securities, Inc.
3. Abacus Securities Corporation
4. AP Securities Incorporated
5. BA Securities, Inc.
6. BDO Nomura Securities Inc.
7. BPI Securities Corporation
8. Coherco Securities, Inc.
9. COL Financial Group, Inc.
10. DA Market Securities, Inc.
11. F. Yap Securities, Inc.
12. First Metro Securities Brokerage Corporation
13. HDI Securities, Inc.
14. Investors Securities, Inc.
15. Jaka Securities Corporation
16. Lucky Securities, Inc.
17. Maybank ATR Kim Eng Securities, Inc.
18. Meridian Securities Incorporated
19. Optimum Securities Corporation
20. Papa Securities Corporation
21. Philstocks Financial, Inc.
22. RCBC Securities, Inc.
23. Regina Capital Development Corporation
24. Timson Securities, Inc.
25. UCPB Securities, Inc.
26. Unicapital Securities, Inc.
27. VC Securities Corporation

Most popular are the COL Financial Group and BDO Nomura Securities Inc. With BDO you just need to allow BDO Online Banking and then you can use that to sign up to BDO Nomura. It's an online trading platform where you can start buying stocks.