A number of coactivators has been identified. Primary coactivators interact with the estrogen receptors directly while secondary coactivators exert their effect via other protein-protein interactions and/or molecular modifications.  For more detailed information check references PMIDs 16394250, 20478437. The coactivators are listed with symbols, aliases in parentheses, full names and links to gene report pages:

Ncoa1 (Src1, Src-1) – nuclear receptor coactivator 1
Ncoa2 (Src2, Tif2, Grip1) – nuclear receptor coactivator 2
Ncoa3 (Src3, Aib1) – nuclear receptor coactivator 3
Ncoa6 (Asc-2, Aib3) – nuclear receptor coactivator 6
Crebbp (Cbp) – CREB binding protein
Ep300 (p300) – E1A binding protein
Med1 (Drip230, Trap220, Trip2) – mediator complex subunit 1
Sra1 (SRAP, STRAA1) – steroid receptor RNA activator 1
Ascc1 (Asc-1, CGI-18) – activating signal cointegrator 1 complex subunit 1
Ddx5 (p68 RNA helicase) – DEAD box helicase 5
Carm1 (Prmt4) – coactivator-associated arginine methyltransferase 1
Prmt1 (Hrmt1l2) protein arginine methyltransferase 1
Calcoco1 (CoCoA) – calcium binding and coiled coil domain 1