The selection of companies in the PSEi is based on a specific set of criteria ranging from total capitalization to minimum number of stockholders upon its planned listing.

In June 1998, the Securities and Exchange Commission (SEC) granted the PSE a "Self-Regulatory Organization" (SRO) status, which meant that the bourse can implement its own rules and establish penalties on erring trading participants (TPs) and listed companies.

In 2001, the PSE was transformed from a non-profit, non-stock, member-governed organization into a shareholder-based, revenue-earning corporation headed by a president and a board of directors and on December 15, 2003, listed its own shares on the exchange (traded under the ticker symbol PSE).

On January 4, 1993, the former Manila Stock Exchange started the computerization of its operations using the Stratus Trading System (STS) with a company called Equicom.

The SCCP acts as the settlement coordinator and risk manager for broker transactions as well as administrator of the trade guaranty fund.

In 2005, the PSE adopted an online daily disclosure system (ODiSy) to improve the transparency of listed companies and ensure full, fair, timely and accurate disclosure of material information from all listed companies.

In March it again broke another record by ending the trading day at 6,847.47 after Fitch Group upgraded the Philippines for the first time to investment grade status .

On April 6, 2015, the PSE Composite the 8,000 mark and closes on another record by ending the trading day at 8,053.74.

[12] Trading on the PSE pre-opens at 9:00 A.M.; opens at 9:30 A.M.; is in recess between 12:00 and 1:30 P.M.; pre-closes at 3:15 P.M.; in run-off from 3:20 P.M.; and closes at 3:30 P.M.[13] The unified trading floor's final location was the Philippine Stock Exchange Tower (PSE Tower), the new headquarters of the PSEi, located in One Bonifacio High Street, Bonifacio Global City, replacing the two trading floors in Metro Manila: one at its headquarters at the PSE Plaza Ayala Triangle, Ayala Tower One in the Makati Central Business District (Makati Stock Exchange); and one at the Philippine Stock Exchange Centre (Tektite Towers), Ortigas Center in Pasig (Manila Stock Exchange).

As of March 28, 2022,[update] the Philippine Stock Exchange has 281 listed companies with a total market capitalization of Php18.25 trillion.