Exhibit 99.1

PENFORD REPORTS FISCAL YEAR AND FOURTH QUARTER 2013 FINANCIAL RESULTS

CENTENNIAL, CO, November 14, 2013 – Penford Corporation (Nasdaq: PENX), a leader in renewable ingredient systems for industrial and food applications, today reported fourth quarter and annual fiscal year 2013 results.

Consolidated annual sales rose 8% to $467.3 million. Net income for the year grew to $4.0 million, or $0.32 per diluted share, compared with a net loss of $9.6 million, or $0.78 per diluted share, for the preceding year.

Fourth quarter consolidated sales increased 6.5% to $117.4 million from $110.2 million a year ago. The Company reported a fourth quarter net loss of $0.9 million, or $0.08 per diluted share, compared with a net loss of $4.4 million or $0.35 per diluted share last year.

A table summarizing quarterly and annual financial results is shown below:

Penford Corporation – Financial Highlights

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Note: EBITDA is defined as net income (loss) before interest, taxes, depreciation and amortization expense. The Company uses a non-GAAP (Generally Accepted Accounting Principles) financial measure, EBITDA, to evaluate performance and establish goals. The Company believes that this measure is valuable to investors in assessing the Company’s operating results when viewed in conjunction with GAAP results.

Highlights for the quarter and year are as follows:

Food Ingredients Division

Industrial Ingredients Division

Consolidated Results

Conference Call

Penford will host a conference call to discuss fiscal 2013 fourth quarter and annual results today, November 14, 2013 at 8:00 a.m. Mountain Time (10:00 a.m. Eastern Time). Access information for the call and web-cast can be found at www.penx.com. To participate in the call on November 14, 2013, please phone 1-877-407-9205 at 7:50 a.m. Mountain Time. A replay will be available at www.penx.com.

About Penford Corporation

Penford Corporation develops, manufactures and markets specialty, natural-based ingredient systems for a variety of industrial and food applications. Penford has seven manufacturing and/or research locations in the United States.

The statements contained in this release that are not historical facts are forward-looking statements that represent management’s beliefs and assumptions based on currently available information. Forward-looking statements can be identified by the use of words such as “believes,” “may,” “will,” “looks,” “should,” “could,” “anticipates,” “expects,” or comparable terminology or by discussions of strategies or trends. Although the Company believes that the expectations reflected in such forward-looking statements are reasonable, it cannot give any assurances that these expectations will prove to be correct. Such statements by their nature involve substantial risks and uncertainties that could significantly affect expected results. Actual future results could differ materially from those described in such forward-looking statements, and the Company does not intend to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise. Among the factors that could cause actual results to differ materially are the risks and uncertainties discussed in this release and those described from time to time in other filings with the Securities and Exchange Commission which include, but are not limited to: competition; the possibility of interruption of business activities due to equipment problems, accidents, strikes, weather or other factors; product development risk; changes in corn and other raw material prices and availability; the Company’s inability to comply with the terms of instruments governing the Company’s debt; changes in general economic conditions or developments with respect to specific industries or customers affecting demand for the Company’s products, including changes in government rules or incentives affecting ethanol consumption, unfavorable shifts in product mix; unanticipated costs, expenses or third party claims; impairment of the Company’s long-lived assets that could

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result in a noncash charge to reported earnings; interest rate, chemical and energy cost volatility; changes in returns on pension plan assets and/or assumptions used for determining employee benefit expense and obligations; unforeseen developments in the industries in which Penford operates; and other factors described in the “Risk Factors” section in reports filed with the Securities and Exchange Commission.

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CHARTS TO FOLLOW

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Penford Corporation

Financial Highlights

Balance Sheets

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Penford Corporation

Consolidated Statements of Operations

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Penford Corporation

Reconciliation of Non-GAAP Measure

To supplement the segment and consolidated financial results prepared in accordance with generally accepted accounting principles (“GAAP”), the Company utilizes a non-GAAP financial measure, net income (loss), before interest, taxes, depreciation and amortization expense (“EBITDA”). The Company uses EBITDA to evaluate performance and establish goals. The Company believes that this measure is valuable to investors in assessing the Company’s operating results when viewed in conjunction with GAAP results. This non-GAAP measure is not a substitute for, or an alternative to, the corresponding measure calculated in accordance with GAAP.

Reconciliation of non-GAAP EBITDA to GAAP Operating Income (Loss)

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