SIGNATURES Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934  the registrant has duly caused this report to be signed on its behalf by the undersigned  thereunto duly authorized. W. R. BERKLEY CORPORATION By  /s/ W. Robert Berkley  Jr. W. Robert Berkley  Jr.  President and Chief Executive Officer February 22  2019 Pursuant to the requirements of the Securities Exchange Act of 1934  this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated. 113 Signature Title Date /s/ William R. Berkley Executive Chairman February 22  2019 William R. Berkley of the Board of Directors /s/ W. Robert Berkley  Jr. President  Chief Executive Officer February 22  2019 W. Robert Berkley  Jr. and Director (Principal executive officer) /s/ Christopher L. Augostini Director February 22  2019 Christopher L. Augostini /s/ Ronald E. Blaylock Director February 22  2019 Ronald E. Blaylock /s/ Mark E. Brockbank Director February 22  2019 Mark E. Brockbank /s/ Mary C. Farrell Director February 22  2019 Mary C. Farrell /s/ María Luisa Ferré Director February 22  2019 María Luisa Ferré /s/ Jack H. Nusbaum Director February 22  2019 Jack H. Nusbaum /s/ Leigh A. Pusey Director February 22  2019 Leigh Ann Pusey /s/ Mark L. Shapiro Director February 22  2019 Mark L. Shapiro /s/ Richard M. Baio Senior Vice President  February 22  2019 Richard M. Baio Chief Financial Officer and Treasurer (Principal financial officer and principal accounting officer)