NEENAH, WI – Plexus Corp. today reported third-quarter 2011 revenue of $559.2 million, up 4.3% year-over-year and down 1.6% sequentially.

The electronics manufacturing services firm previously guided between $550 million and $580 million.

Net income for the period was $22 million, down 9.8% year-over-year, and down 8% sequentially.

The company expects fourth-quarter revenue between $530 million and $560 million.

“We experienced an exceptional level of forecast volatility during the quarter, as customers broadly lowered their demand for the second half of our fiscal year. As a consequence, our overall revenue performance in the fiscal third quarter was below the midpoint of our guidance range. New business development activity was adequate to support our nearer-term growth goals, with 25 new programs won in our Manufacturing Solutions group that we anticipate will generate approximately $124 million in annualized revenue when fully ramped into production. We continue to experience strong business development by our medical sector, which represented $55 million of this total,” said Dean Foate, president and CEO.