Former Western Asset manager Kenneth Leech pleads guilty to obstructing SEC probe

Kenneth Leech, the former co-chief investment officer at Western Asset Management Co., pleaded guilty on June 12 in Manhattan federal court to obstructing a Securities and Exchange Commission investigation. The charge stems from false testimony he gave about a trade allocation scheme that allegedly funneled over $600 million in profits to his preferred client portfolios.

The guilty plea landed just three days before a criminal fraud trial was scheduled to begin on June 15. Rather than roll the dice in front of a jury, Leech chose to admit he lied to the SEC during testimony on March 6, 2024.

The cherry-picking scheme

Here’s how it allegedly worked. Leech managed multiple client portfolios at Western Asset Management, a firm overseeing roughly $229 billion in assets as of March 2026. Between January 2021 and October 2023, he is accused of watching how trades performed throughout the day, then deciding after the fact which clients would get the winners and which would eat the losses.

The favored clients sat in Leech’s “Macro Opportunities” portfolios. The less fortunate ones occupied what the firm called “Core” and “Core Plus” portfolios. Over that nearly three-year window, the scheme allegedly steered more than $600 million in gains toward the preferred accounts, while directing comparable losses to the disfavored ones.

WAMCO’s $100 million settlement

Western Asset Management itself didn’t escape unscathed. The firm agreed to pay a $100 million civil penalty to the SEC on June 5, settling the regulator’s related charges. WAMCO did not admit wrongdoing as part of that agreement.

The Department of Justice, meanwhile, closed its own investigation into the firm with a declination letter. So while Leech faces personal criminal liability, the firm itself walks away with a financial penalty but no criminal record.

A $100 million fine for a company managing $229 billion is roughly 0.04% of assets under management.

What Leech actually admitted to

The guilty plea specifically covers obstruction, not the underlying fraud itself. Leech admitted that when the SEC questioned him under oath on March 6, 2024, he provided false testimony about his trade allocation practices.

Leech is 71 years old. His sentencing will determine whether his career in fixed-income management ends with prison time or something less severe.

What this means for investors

The Leech case is a textbook example of why trade allocation practices deserve scrutiny from any investor placing money with a discretionary manager. Cherry-picking, the practice of assigning completed trades to accounts after observing their performance, is one of the oldest tricks in asset management.

The SEC’s ability to uncover this scheme likely relied on detailed analysis of trade timestamps across multiple accounts, comparing allocation patterns against intraday price movements.

One thing worth watching: whether other regulators or class-action attorneys use the Leech guilty plea as a foundation for additional claims. A criminal admission of obstruction makes it significantly easier for civil plaintiffs to argue that something was, in fact, being obstructed. The clients who sat in those “Core” and “Core Plus” portfolios, absorbing hundreds of millions in misdirected losses, now have a convicted obstructor on the other side of the table.

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