Kenneth Goodley's 'Berkshire Breweries of the C19th' has:
E Berks Brewery (King St) - Jas Blumson (1883), Alfred Ernest Keyes (1887, 1891), Nicholson & Sons (1895 on)
Langton's Brewery (Market St) - John Langton (to 1828), John Edwd Langton (to 1854 or later), Hy & Phiip S Langton & Hy Parker Burrows (1863), Langton & Co (1867-8), PS Langton (1883 on)
North Town Brewery - Richard Partle (1830-42) ceased
Pineapple Brewery (High St) - Robert Nicholson (to 1847), Wm Nicholson (to 1895) Nicholson & Sons (1895 on) also at E Berks Brewery, King St and Imperial Brewery, Uxbridge.
Thames Brewery (Bridge St) - Jas Mickley (1830), Jas Thos Bell (1842-54) then demolished and new premises built (Bell Brewery)
Bell Brewery (King St) - Jas Thos Bell (1854-63), John & Jas Fuller (1863-68 or later), John Fuller & Co (1883 on)
I suspect the dates refer mainly to directory entries.