No, they do not. An institutional client (e.g. a large fund) will be covered directly by the sales force at each broker-dealer and the client will comp the order directly with the desks. In listed space, the commission costs will be negotiated together with the levels of the trade itself (e.g. the market might look like 20@ 20.35 w 2c), in OTC on quote only.Quote from FSU:
Whether you use Goldman, IB or most others, if you have an order of that size, it will be shopped around. There are many groups, institutions, etc that will all be called with the order no matter what broker gets it. IB has the same numbers on speed dial as the other brokers.
If it is something listed, sometimes the trader will pass this along to the floor or shop it around (latter one very rare), but in most cases it will be done on principal basis. E.g. if I get an order for big chunk of 25x30 Apr VIX call spread, I can, obviously, pass it on to the floor bookie, but if I am in comp with 5 other dealers I will only be win it if the direction of the client trade would fit my book. If the client trades, my bank would be the one getting the commissions directly from the client.