机构投资者自身具备个人所不能企及的优势，如广泛的信息来源获取能力、专业的判断能力、可靠的资金保障能力等，这些优势给机构投资者带来了较强的竞争能力和专业能力。当机构投资者持有上市公司股票时，其可能会参与到公司治理当中，并发挥积极作用，进而可能会提升公司的绩效水平。根据以上的分析，我们提出了以下问题并进行探究：机构投资者持股是否会显著提高公司绩效表现？相对而言，更具独立性、具有长远投资理念的机构投资者，在提升公司绩效上是否会表现的更好？本文梳理了相关的文献研究，并对所涉及的三大理论进行了说明和整理，即委托代理理论、利益相关者理论和成本收益理论。在此基础上，本文提出了三个研究假设。在数据处理和实证分析阶段，本文选取沪深A股上市公司2015-2018年的数据作为样本，综合运用多种分析方法进行实证检验。最终得出结论：（1）公司绩效的表现将会伴随着机构持股比例的上升，而得到显著的提高。表明机构对公司治理方面可以发挥有效监督把控作用，或者可以帮助公司做出合理经营决策。（2）相比于压力敏感型的机构，压力抵抗型机构持股比例对于公司绩效的提升更加明显。压力抵抗型持股比例每上升1个百分点，总资产收益率上升0.208个百分点，而敏感型这一数字为0.034。（3）尽管影响力度很小，压力敏感型的机构也会对公司的业绩表现有正面的贡献。

Institutional investors have advantages that cannot be achieved by individuals, such as the ability to obtain a wide range of information, professional judgment and reliable capital guarantee capability. These advantages bring institutional investors strong competitiveness and professional capability. When institutional investors hold stocks in listed companies, they may participate in corporate governance and play an active role, which in turn may improve the company's performance. Based on the above analysis, we raise the following questions: Will institutional investor holdings improve the company's performance? Will more independent institutional investors with long-term investment philosophy perform better in improving company performance?This paper sorts out the relevant literature research and explains three major theories involved. On this basis, we propose three research hypotheses. In the stage of data processing and empirical analysis, we select the data of Shanghai-Shenzhen A-share listed companies from 2015 to 2018 as a sample. Through various empirical analysis methods, we finally reached conclusions: (1) The overall shareholding ratio of institutional investors can significantly improve the company's performance, indicating that institutional investors can play an effective role in supervision or help companies make reasonable business decisions. (2) Compared with pressure-sensitive institutions, the proportion of shares held by pressure-resistant institutions is more significant to the improvement of company performance. For every 1 percentage point increase in the proportion of pressure-resistant stocks, the return on total assets rise by 0.208 percentage points, while the figure for sensitive types is 0.034. (3) Pressure-sensitive organizations also have a positive impact on company performance.