UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

May 6, 2020

 Date of Report (Date of Earliest Event Reported)

Central Index Key Number of issuing entity:  0001792905

CSAIL 2019-C18 Commercial Mortgage Trust

(Exact name of issuing entity)

Central Index Key Number of registrant:  0001654060

Credit Suisse Commercial Mortgage Securities Corp.
(Exact name of registrant as specified in its charter)

Central Index Key Number of sponsor:  0001628601

Column Financial, Inc.
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor:  0001685185

UBS AG
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor:  0001654834

Rialto Real Estate Fund III – Debt, LP
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor:  0001548567

CIBS Inc.
(Exact name of sponsor as specified in its charter)

Central Index Key Number of sponsor:  0001755531

Societe Generale Financial Corporation
(Exact name of sponsor as specified in its charter)

c/o Wells Fargo Bank, National Association

as Certificate Administrator

9062 Old Annapolis Road

Columbia, MD

(Address of principal executive offices of issuing entity)

(212) 538-1807

Registrant’s telephone number, including area code

Former name or former address, if changed since last report:  Not Applicable

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o  Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

o Emerging growth company

o If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.

Item 8.01. Other Events.

Effective May 6, 2020 and pursuant to Section 7.01 of the pooling and servicing agreement, dated as of August 1, 2019, relating to the Wells Fargo Commercial Mortgage Trust 2019-C52 filed as Exhibit 4.6 to the Current Report on Form 8-K filed on December 12, 2019 (the “WFCM 2019-C52 PSA”), out of which the Del Mar Terrace Mortgage Loan (approximately 1.0% of the initial principal balance of the mortgage pool) is being serviced, LNR Partners, LLC was removed as special servicer and Argentic Services Company LP (“ASC”), a Delaware limited partnership, was appointed as the successor special servicer. ASC maintains its principal special servicing office at 500 North Central Expressway, Suite 261, Plano, Texas 75074 and its telephone number is 469-609-2000.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.