I say only the 11 apostles were present for it.
Acts 1:1-11
1The former treatise have I made, O Theophilus, of all that
Jesus began both to do and teach,
2Until the day in which
he was taken up, after that
he through the Holy Ghost had given commandments unto the
apostles whom he had chosen:
3To
whom also
he shewed himself alive after his passion by many infallible proofs, being seen of
them forty days, and speaking of the things pertaining to the kingdom of God:
4And, being assembled together with
them, commanded them that
they should not depart from Jerusalem, but wait for the promise of the Father, which, saith
he,
ye have heard of
me.
5For John truly baptized with water; but
ye shall be baptized with the Holy Ghost not many days hence.
6When
they therefore were come together,
they asked of
him, saying, Lord, wilt thou at this time restore again the kingdom to Israel?
7And
he said unto them, It is not for
you to know the times or the seasons, which the Father hath put in his own power.
8But
ye shall receive power, after that the Holy Ghost is come upon
you: and
ye shall be witnesses unto
me both in Jerusalem, and in all Judaea, and in Samaria, and unto the uttermost part of the earth.
9And when
he had spoken these things, while
they beheld,
he was taken up; and a cloud received
him out of their sight.
10And while
they looked stedfastly toward heaven as
he went up, behold, two men stood by
them in white apparel;
11Which also said,
Ye men of Galilee, why stand ye gazing up into heaven? this same
Jesus, which is taken up from you into heaven, shall so come in like manner as ye have seen him go into heaven.
The blue words reference only the apostles the red words reference only Jesus.