CHICAGO — The Kraft Heinz Co. said May 6 its earnings statements for fiscal years 2016, 2017 and through the third quarter of fiscal 2018 “should no longer be relied upon, because of certain misstatements.” The announcement follows an investigation that found misconduct by employees in its procurement department. The investigation was triggered by a subpoena issued by the U.S. Securities and Exchange Commission in October 2018.

“As a result of the findings from the company’s investigation, which identified that several employees in the procurement area engaged in misconduct, the company has recorded adjustments to correct prior period misstatements that increase the total cost of products sold in prior financial periods, which the company does not believe constitute a quantitatively material misstatement to any individual period,” Kraft Heinz Co. said in a filing with the S.E.C. “These misstatements principally relate to the incorrect timing of when certain cost and rebate elements associated with complex supplier contracts and arrangements were initially recognized, and once corrected for, the company expects to recognize corresponding decreases to costs of products sold in future financial periods. The findings from the investigation did not identify any misconduct by any member of the senior management team.”

The investigation also found misstatements related to certain supplier contracts and arrangements where the allocation of value should have been recognized over an applicable contractual period. The company could not determine if supplier contract misstatements were related to the misconduct found in procurement.

As a result, Kraft Heinz Co. identified required adjustments of approximately $208 million, of which $27 million was recorded in the fourth-quarter cost of products sold.

“The cumulative net misstatements to the previously furnished or reported annual and interim financial statements were approximately $181 million, which, when reflected over the relevant periods, resulted in misstatements that are not quantitatively material to any prior year or quarter, but would have been significant to the fourth quarter of 2018 if corrected in that period,” the company said.

For the fourth quarter of fiscal 2018, ended Dec. 29, 2018, the Kraft Heinz Co. wrote down the value of its Kraft and Oscar Mayer brands by $15.4 billion. As a result, the company sustained a loss of $10,292 million for the year, which compared with income of $10,999 million, equal to $9.03 per share on the common stock, in fiscal 2017.

In the fourth quarter, Kraft Heinz sustained a loss of $12,608 million, which compared with income of $8,003 million, or $6.57 per share, in the same period a year ago. Last year’s results included an income tax benefit of $6,665 million.

With adjustments, fiscal 2016 net income was lowered $20 million to $3,622 million, fiscal 2017 net income was lowered $69 million to $10,921 million, and the loss recorded in fiscal 2018 was $10,265 million, smaller than the previously announced $10,292 million.

Kraft Heinz also disclosed it has received an additional subpoena from the S.E.C. on March 1 related to its assessment of goodwill and intangible asset impairments and related matters. The company said it is cooperating.

It is against this backdrop that Miguel Patricio will become chief executive officer of Kraft Heinz on July 1. He was named the new c.e.o. on April 22 and is succeeding Bernardo Hees, who has led the company since 2015.