Some people contend that only the twelve apostles received the Spirit, but this is demonstrably incorrect:
(1) Jesus gave the promise to all those at His ascension, not just to the Twelve.
(2) All the 120 went to the upper room to await the fulfillment of the promise, and we find no record that any of them left.
(3) In Joel's prophecy, which Peter applied to Pentecost, God said He would pour out His Spirit on all flesh, including sons, daughters, young men, old men, servants, and handmaidens (Acts 2:1648). This certainly describes more than the Twelve; all 120, including the women, received the Spirit.
We can assume that an additional 3000 received the Spirit in response to Peter's sermon, as shown by the following:
(1) Peter promised the gift of the Holy Ghost to all who heard his word (Acts 2:38-39), and 3000 received his word gladly (Acts 2:41). Peter began his sermon by explaining what had just happened to him; he ended it by offering the same experience to his audience.
(2) The 3000 believed his message and applied it to their lives, and he preached that the gift of the Holy Ghost was available to them.
(3) The 3000 were baptized (Acts 2:41). Even if this means water baptism alone, the Spirit was promised to all who would repent and be baptized in water.
(4) The 3000 were "added unto them," namely to the 120 who had just received the Spirit. We conclude, as does The Pulpit Commentary, that 3120 received the Holy Spirit on the Day of Pentecost. [76]
The 3120 were all Jews and Jewish proselytes, for much later Jewish Christians still were not certain that Gentiles could be saved (Acts 10-11). Some could have been proselytes - Gentiles by birth but Jews by conversion (Acts 2:10). The 120 were mostly Galileans, but the 3000 included Jews from many different countries who had come to Jerusalem to celebrate the feast of Pentecost (Acts 2:5-11).
The company of believers later came together to pray and were "all filled with the Holy Ghost" (Acts 4:31). This was not a first-time Spirit baptism but a renewal and an anointing of the Spirit-baptized Jewish believers.
In conclusion, the Day of Pentecost represents the first occurrence of the baptism of the Holy Ghost, specifically, the first outpouring on the Jews.
*side note*
Since 1st century writers often did not include women and children when they counted, its possible that the actual number might have been much higher
