Ernest Sean Mishne (CRD#2091091) and OPPENHEIMER & CO. INC.

The Securities Lawyers at Halling & Cayo, S.C. are looking into potential claims against Ernest Sean Mishne (CRD#2091091) regarding allegations made regarding the following:

Claim(s) Made Against Ernest Sean Mishne:

Claim Date: 1/20/2020

“Claimant alleges claims for Breach of Fiduciary Duty, Breach of Duty to Provide Suitable Investment Advice, Fraud and Violation of FINRA Rules. From 2/1/2017 – 8/31/2019”

This claim, as of this posting, is currently Award / Judgment with a claim amount of $440,000.00 .

See more information on FINRA’s BrokerCheck site for Ernest Sean Mishne.

Have an issue with Ernest Sean Mishne?

If you are a former client of Ernest Sean Mishne and OPPENHEIMER & CO. INC. from BEACHWOOD, OH, and have encountered any issues or problems, the Securities Lawyers at Halling & Cayo, S.C. want to speak with you about the possibility of pursuing a claim. Brokerage firms have a duty to oversee all of their registered representatives, including Ernest Sean Mishne, and ensure that they follow all securities regulations, rules, and internal policies. If a brokerage firm fails in this duty, it may be held accountable for investment losses sustained by customers due to a lack of supervision.

The Securities Lawyers have successfully recovered millions of dollars for investors across the country and are currently considering bringing claims on behalf of individuals or groups of investors who have suffered losses. If you are a former customer of Ernest Sean Mishne and OPPENHEIMER & CO. INC. and have incurred investment losses, please contact the Securities Lawyers. You may be entitled to financial compensation, and we work on a contingency basis, meaning we only get paid if we recover your money. Please note that there may be time limits or statutes of limitations that apply to your claim, so it is important to act quickly and speak with an attorney as soon as possible.

Contact The Securities Lawyers


Sean M. Sweeney is a shareholder at Halling and Cayo, a full service law firm in Milwaukee, WI and the head of its Securities Litigation team.

He represents individual and institutional investors in FINRA arbitration and court nationwide. He recovers investment losses from fraud or breach of duty from their broker-dealer.

Contact him at (414) 755-5020 or via e-mail at to see if he can help recover your funds.