Allison Pristash State Street 1 Lincoln Street Mail Stop SUM 0703 Boston, MA 02111 Tel +1 617 662 7031 APristash@StateStreet.com

April 12, 2019

Securities and Exchange Commission

100 F Street, N.E.

Washington, DC 20549

RE: iShares Trust (the “Registrant”)

Securities Act File No. 333-92935

Investment Company Act File No. 811-09729

Ladies and Gentlemen:

On behalf of the Registrant and pursuant to Rule 497 under the Securities Act of 1933, as amended, attached for filing are exhibits containing interactive data format risk/return summary information that mirrors the risk/return summary information in the 497 filing, dated March 28, 2019 to the prospectuses for the following funds:

iShares Edge MSCI Multifactor USA ETF

iShares Edge MSCI Multifactor USA Small-Cap ETF

The purpose of this filing is to submit the 497 dated March 28, 2019 in XBRL.

If you have any questions regarding this filing, please contact Benjamin Haskin of Willkie Farr & Gallagher LLP at (202) 303-1124.

Very truly yours,

/s/ Allison Pristash

Allison Pristash

cc: Benjamin Haskin, Esq.