Western Digital Corporation (NASDAQ: WDC) is a well-known data storage provider that manufactures hard disk drives and solid-state drives. The company has grown significantly from 2005 to 2015, thanks to its series of acquisitions of other companies, which allowed the firm to expand its offerings of solid-state drives and pursue other enterprises. The company has a dominant market share in the serial attached small computer system interface ("SCSI") and will expand its software offerings in the market due to its acquisition of SanDisk Corp. (NASDAQ: SNDK) in October 2015.

Because of Western Digital's strong growth, the company is part of numerous mutual fund investment portfolios. The following are the top five funds that hold Western Digital shares.

Alken Fund European Opportunities R

The Alken Fund European Opportunities R (VANEOPR:LX) invests in stocks of companies that can benefit from growth in the European stock market. The fund typically looks for undervalued companies with high growth potentials. As of Nov. 30, 2015, the fund holds shares of Western Digital that account for 4.11% of the fund's total assets. The fund holds 57 stock positions, and its assets are concentrated in consumer cyclicals equities with about a 35% allocation and information technology stocks with a 21% allocation. The fund has received a four-star overall rating and a silver analyst rating from Morningstar in the Europe flex-cap equity category. The fund charges a fee of 1.85% and is incorporated in Luxembourg. It is primarily available to European investors.

Vanguard Total Stock Mkt Idx Inv

Started in 1992, the Vanguard Total Stock Mkt Idx Inv (VTSMX) invests in stocks with the goal of providing exposure to the entire U.S. equity market, including small-, mid-, and large-cap growth and value stocks. As of January 31, 2016, the fund held common shares of Western Digital that accounted for 0.05% of its total portfolio and 1.78% of the total Western Digital's outstanding common shares. The fund boasts one of the strongest risk-adjusted performance and has earned a four-star overall rating and a gold analyst rating from Morningstar in the large-blend category. The fund provides one of the cheapest exposures to the broad basket of U.S. stocks with a net expense ratio of 0.17%, which is significantly lower compared to its competitors.

Fidelity OTC

The Fidelity OTC ("FOCPX") seeks capital appreciation by investing in stocks traded primarily on the NASDAQ or the over-the-counter (OTC) market. The fund focuses on growth stocks or value. As of Jan. 31, 2016, the fund held common shares of Western Digital which had a 1.32% allocation in its portfolio and accounted for 1.42% of the total shares outstanding of the company. About 54% of the fund's assets are held in information technology equities, while health care stocks have an 18% allocation. The fund received a five-star overall rating and a bronze analyst rating from Morningstar in the large growth category. The fund comes with a net expense ratio of 0.83%.

Vanguard 500 Index Inv

The Vanguard 500 Index Inv ("VFINX") tracks the performance of the Standard & Poor's 500 Index, which broadly represents the U.S. stock market performance. The fund attempts to replicate the investment results of the underlying index by holding all the stocks included in the S&P 500 Index. As of Jan. 31, 2016, the fund holds stock of Western Digital, which accounts for 0.06% of the fund's total assets and 1.24% of the total shares outstanding of the company. The fund has earned a four-star overall rating and gold analyst rating from Morningstar in the large-blend category for its consistent management and parent name. The fund charges its investors a net expense ratio of 0.17%.

JHancock Disciplined Value Mid Cap Fund Class A

The JHancock Disciplined Value Mid Cap Fund Class A ("JVMAX") seeks long-term growth of capital by investing in a diversified portfolio of stocks with medium market capitalization and value characteristics. The fund's management uses trends in industries, earnings power and growth to select holdings for its portfolio. As of Jan. 31, 2016, the fund's stake in Western Digital accounted for 0.64% of its total assets or approximately 0.6% of the total common shares outstanding of the company. The fund received a five-star overall rating from Morningstar in the mid-blend category. The fund has a net expense ratio of 1.13%.