 BNP Paribas Arbitrage SA raised its stake in Benchmark Electronics, Inc. NYSE:BHE by 2.9 during the first quarter, HoldingsChannel.com reports. The institutional investor owned 19,436 shares of the technology companys stock after buying an additional 549 shares during the period. BNP Paribas Arbitrage SAs holdings in Benchmark Electronics were worth 389,000 at the end of ... 