Citadel Securities (the market maker that buys and executes Robinhood's order flow) and Citadel (the investment group) are very different companies, and they ha

Citadel Securities (the market maker that buys and executes Robinhood's order flow) and Citadel (the investment group) are very different companies, and they have a ton of red tape in place to prevent risk of collusion between the two. Considering Citadel Securities makes _significantly_ more money than Citadel would stand to lose with its short positions, the thought of the two colluding to pressure Robinhood seems a bit far fetched to me.