Exhibit (a)(xv)

TEKLA LIFE SCIENCES INVESTORS

Amendment to Declaration of Trust

Notice of Change of Trustee

WHEREAS, Michael Bonney tendered his resignation as a Trustee of Tekla Life Sciences Investors (the “Fund”) effective November 1, 2018, the Fund issues this notice in accordance with the terms of the Declaration of Trust of the Fund, dated and filed with the Secretary of State of the Commonwealth of Massachusetts on February 20, 1992, as amended;

WHEREAS, at a meeting of the Trustees of Tekla Life Sciences Investors (“The Fund”) on December 13, 2018, the Trustees of the Fund appointed Dr. Elizabeth G. Nabel as Trustee to the Fund, effective upon her written acceptance and agreement to be bound by the terms of the Declaration of Trust of the Fund, dated and filed with the Secretary of State of the Commonwealth of Massachusetts on February 20, 1992, as amended;

NOW, THEREFORE, as a result of the foregoing Trustee resignation and Trustee’s appointment, the seven Trustees of the Tekla Life Sciences Investors are:

Thomas M. Kent	100 Federal Street, 19th Floor
	Boston, MA 02110
Elizabeth G. Nabel, M.D.	100 Federal Street, 19th Floor
	Boston, MA 02110
Rakesh K. Jain, Ph.D.	100 Federal Street, 19th Floor
	Boston, MA 02109
Daniel R. Omstead, Ph.D.	100 Federal Street, 19th Floor
	Boston, MA 02110
Oleg M. Pohotsky	100 Federal Street, 19th Floor
	Boston, MA 02110
William S. Reardon	100 Federal Street, 19th Floor
	Boston, MA 02110
Lucinda H. Stebbins	100 Federal Street, 19th Floor
	Boston, MA 02110

IN WITNESS WHEREOF, this Notice has been subscribed this 12th day of March, 2019, by the undersigned who affirms that the statements made herein are true under the penalties of perjury.

/s/Laura Woodward

Laura Woodward, Secretary