For investment banking networking, email is usually the stronger primary channel. Bankers manage professional conversations through their inboxes, and an email gives you enough room to establish a connection, explain your interest, and request a brief call. It is also easier for the recipient to forward your note or return to it later.
LinkedIn is more useful for identifying relevant people, confirming their career history, and reaching contacts whose email addresses you cannot find. A LinkedIn profile may reveal that someone attended your university, worked at a firm where you interned, or moved from your target group into private equity. Those details help you choose appropriate contacts and personalize your outreach.
However, LinkedIn messages are easier to overlook. Some bankers rarely check connection requests, while others use the platform regularly. Usage varies by individual, firm, geography, and seniority, so a lack of response does not necessarily mean the person rejected your request.
The best approach is not to choose one platform exclusively. Use LinkedIn for research and discovery, email for most substantive outreach, and LinkedIn messaging as a backup when email is unavailable or has not worked.