The use of agents in negotiations is ubiquitous. Little is known, however, about the divergent psychological experiences of agents and principals in negotiations and their potential downstream consequences. The current research investigated how one's role in a negotiation (as a principal or an agent) affects feelings of control, and how these feelings determine subjective value. In Studies 1 and 2, participants were randomly assigned to role-play principals or agents in deal-making negotiations. In both studies, agents reported feeling more control than principals, and control positively predicted the subjective value derived from the negotiation. In Studies 3 and 4, experimentally enhancing feelings of control influenced subjective value for principals. These findings point to the potential psychological costs of using agents. The findings advance research on subjective value in negotiations and highlight the critical role of control in principal-agent relationships. Agents are commonly used in deal-making negotiations in business, politics, and litigation, as well as in numerous other transactions in sports, entertainment, real-estate, and more. Agents act as salespeople, as advisors, as brokers, and as the focal contact persons for their clients' business, legal, and sometimes even personal needs. Employing agents in negotiations comes with clear benefits (Rubin & Sander, 1988). Agents have domain-specific expertise (e.g., tax attorneys); possess special connections via their networks (e.g., Capitol Hill lobbyists); provide principals with tactical flexibility (e.g., sports agents); and allow principals to preserve relationships and save face while taking a hard line (e.g., by transferring responsibility to attorneys). However, employing agents in negotiations also comes with undeniable costs. Agents may have goals that conflict with those of their principals (Aaldering, Greer, Van Kleef, & De Dreu, 2013; Eisenhardt, 1989); they are often reluctant to admit their biases (Northcraft & Neale, 1987); and they tend to be swayed by competitive directions more than by cooperative directions (Atanasov & Kunreuther, 2015; Steinel, De Dreu, Ouwehand, & Ramirez-Marin, 2009). Although principals often delegate responsibility for the negotiation process to agents who represent them at the bargaining table, little is known about the divergent perspectives and experiences of principals and agents in negotiations. While past research has utilized agency theory to understand the economic risks experienced by principals, research on the corresponding psychological risks is scarce. The current paper takes a first step toward filling this gap by investigating differences in feelings of control between principals and agents, as well as the influence of these divergent experiences on subjective valuations of negotiations.