Exhibit 99.1

For Immediate Release                                                  

WSI Industries Reports Fourth Quarter and Full Year Results

October 20, 2015—Minneapolis, MN—WSI Industries, Inc. (Nasdaq: WSCI) today reported annual sales for the fiscal 2015 year ending August 30, 2015 of $42,983,000 versus the prior year’s sales of $42,714,000. The Company also reported full year net income of $997,000, or $.34 per diluted share versus $1,224,000 or $.41 per diluted share in the prior year.

For the fiscal 2015 fourth quarter, the Company reported sales of $8,779,000 versus the prior year’s quarter of $11,329,000 while the Company incurred a net loss of $34,000 or $.01 per diluted share as compared to net income of $300,000 or $.10 per diluted share in the prior year’s fiscal fourth quarter. Included in the fiscal 2015 fourth quarter net loss was an income tax benefit related to the utilization of research and development tax credits from prior fiscal years.

Benjamin Rashleger, president and chief executive officer, commented: “WSI experienced a difficult fourth quarter with sales and profitability not meeting expectations. Our fourth quarter results were affected by two main factors. The first, which we believe to be a temporary and one-time impact, was our largest customer experienced internal production capacity constraints, which postponed sales that normally would have occurred in the fourth quarter into our fiscal 2016 year. The second factor, which is more long-term in nature, is the continued slowdown in our energy business, which experienced another decline in the sales level, and had a more significant impact on our results.”

Related to the results, Rashleger commented: “The reduction in our energy business continues to have a negative impact on our business. This industry swing further illustrates the priority for us to diversify our portfolio in both industries and customers for which we serve. We have further increased our business development efforts, and are building a more focused, robust and perpetual strategy as it relates to bringing new opportunities to WSI. We are seeing traction in our current business development efforts, and the number and quality of the opportunities that we are pursuing are continuing to improve. We are confident that we will capitalize on these efforts, however the incubation period to close opportunities similar to those that we target can be quite long.” Rashleger continued: “Within our existing business, our primary customer, with whom we have maintained a long partnership, continues to grow and gain market share. We believe that our core capabilities will allow us to continue and expand on that long-term relationship. Our aerospace business is growing, and we are also expanding our automotive business. Considering our forecast and the visibility we have for potential new opportunities that we are working on, we remain positive about the outlook for WSI.”

Related to the company priorities, Rashleger commented: “In fiscal 2015, we focused on two main areas: Operational Excellence and Business Development. In the next year we intend to further expand on those themes. We face competition from around the world and in order to excel we will need to augment our efforts in our lean and continuous improvement activities. We had success in these activities in fiscal 2015, and we look forward to continued success in the coming year. From a business development perspective, we will continue to invest in our sales organization to expand its reach and capabilities. In the coming months we will be expanding our business development team and defining an executable strategy behind our business development efforts.”

Rashleger concluded: “We are committed to improving value for our shareholders by continually working on the items that will improve bottom line results as well as diversification efforts that will drive top line growth. We are optimistic about our future, and of the potential for WSI Industries.”

The Company also announced today that its Board of Directors has declared a quarterly dividend of $.04 per share. The dividend will be payable November 17, 2015 to holders of record on November 3, 2015.

WSI Industries, Inc. is a leading contract manufacturer that specializes in the machining of complex, high-precision parts for a wide range of industries, including automotive, avionics and aerospace, energy, recreational vehicles, small engines, marine, bioscience and the defense market.

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For additional information:

Benjamin Rashleger (President & CEO) or Paul D. Sheely (CFO) 763-295-9202 

WSI INDUSTRIES, INC.

(1) Cash flows from operating activities includes non-cash adjustments for depreciation, deferred taxes and stock option compensation expense of $2,127 and $3,154 at August 30, 2015 and August 31, 2014, respectively.