The phrase "a significant shareholder" is correct and usable in written English.
It can be used in contexts related to finance, business, or corporate governance to refer to an individual or entity that holds a substantial portion of a company's shares.
Example: "The board of directors must consider the opinions of a significant shareholder when making decisions that affect the company's future."
Alternatives: "a major stakeholder" or "a key investor".
The owner of Budweiser and Michelob welcomed Mr Buffett's firm, Berkshire Hathaway, as a "significant shareholder".
A major sponsor, or a significant shareholder, can be in practical control of a club.
Rock said he would remain on the board of Audioboo and is still a significant shareholder.
Jeff Chatfield, a significant shareholder in Avation, is chairman of both companies.
Champion said: "I have enjoyed working with Stelios, and am delighted he will remain a significant shareholder".
Sky has a significant shareholder base that is disgruntled with elements of Fox's management of the business.
"The board of Rangers is delighted that George Taylor, an existing significant shareholder, and George Letham, who provided the company with a credit facility in 2014, together with Douglas Park have demonstrated their commitment to the company through this purchase.
"The Board of Rangers is delighted that George Taylor, an existing Significant Shareholder, and George Letham, who provided the Company with a credit facility in 2014, together with Douglas Park have demonstrated their commitment to the Company through this purchase.
Although not a director or significant shareholder of the new company, Pearson continued to promote the project over the next few years and use his influence to help the company raise the £1 million of capital needed for the construction of the line.
Much of SoftBank's hopes are tied to Sprint's bid to buy the remainder of Clearwire, an offer that has drawn significant shareholder opposition.
As a significant minority shareholder in Rosneft, BP will benefit from these ventures, Mr. Sechin said.
