UNITED STATES SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                   FORM N-CSR

                              CERTIFIED SHAREHOLDER
              REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES

                  Investment Company Act file number: 811-10041
                             JNL Investors Series Trust
               (Exact name of registrant as specified in charter)

                       1 Corporate Way, Lansing, MI 48951
              (Address of principal executive offices) (Zip code)

                               Susan S. Rhee, Esq.
                     Jackson National Asset Management, LLC
                                1 Corporate Way
                               Lansing, MI 48951
                    (Name and address of agent for service)

Registrant's telephone number, including area code: 517 381-5500

Date of fiscal year end: December 31

Date of reporting period: June 30, 2005


Item 1. Report to Shareholders.

There is no Report to Shareholders since the Registrant has not commenced
operation, but has been funded with seed money.

Item 2. Code of Ethics.

Not applicable to the semi-annual filing.


Item 3. Audit Committee Financial Expert.

Not applicable to the semi-annual filing.


Item 4. Principal Accountant Fees and Services.

Not applicable to the semi-annual filing.


Item 5.  Audit Committee of Listed Registrants.

Not applicable as this is not a listed issuer as defined in Rule 10A-3 under the
Exchange Act.


Item 6. Schedule of Investments

Included as a Part of the Report to Shareholders filed under Item 1.


Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End
Management Investment Companies.

Not applicable as this is an Open-End Management Investment Company.


Item 8. Portfolio Managers of Closed-End Management Investment Companies.

Not applicable as this is an Open-End Management Investment Company.


Item 9. Purchases of Equity Securties by Closed-End Management Investment
Company and Affiliated Purchasers.

Not applicable as this is an Open-End Management Investment Company.


Item 10.  Submission of Matters to a Vote of Security Holders.

No material changes have been made.


Item 11. Controls and Procedures.

     (a) In order to ensure that the  information  that we must  disclose in our
filings with the  Securities  and Exchange  Commission  is recorded,  processed,
summarized and reported on a timely basis, we have adopted  disclosure  controls
and procedures. Our President and Chief Executive Officer, Robert A. Fritts, and
our Chief  Financial  Officer,  Mark D. Nerud,  have  reviewed and evaluated our
disclosure  controls and  procedures as of August 22, 2005, and have concluded
that our disclosure controls and procedures are effective.

     (b) There  were no  changes  in the  registrant's  internal  control  over
financial  reporting  (as  defined in Rule  30a-3(d)  under the 1940 Act (17 CFR
270.30a-3(d))  that  occurred  during the  registrant's  first and second fiscal
quarters of the period covered by this report that has materially  affected,  or
is reasonably  likely to materially  affect,  the registrant's  internal control
over financial reporting.


Item 12. Exhibits

        a. (1)  Not applicable to the semi-annual filing.
           (2)  The certifications required by Rule 30a-2 of the Investment
                Company Act of 1940, as amended, are attached hereto.
           (3)  Not Applicable.

        b. (1)The certification required by Rule 30a-2(b) fo the Investment
           Company Act of 1940, as amended, and Section 906 of the
           Sarbanes-Oxley Act of 2002, is attached hereto.



                                   SIGNATURES

     Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, as amended,  the registrant has duly caused this
report to be signed on its behalf by the undersigned,  thereunto duly authorized
in the City of Lansing and State of Michigan, on the 1st day of September, 2005.

JNL Investors Series Trust
(Registrant)

By:   /s/ Robert A. Fritts
      ------------------------------
      Robert A. Fritts, President



     Pursuant to the requirements of the Securities Exchange Act of 1934 and the
Investment Company Act of 1940, as amended, this report has been signed below by
the following  persons on behalf of the  registrant and in the capacities and on
the dates indicated.


Signature                            Title                         Date

/s/ Robert A. Fritts                 President                September 1, 2005
- -----------------------------
Robert A. Fritts


/s/ Mark D. Nerud                    Chief Financial Officer  September 1, 2005
- -----------------------------
Mark D. Nerud




                                  EXHIBIT LIST

Exhibit 12(a)(2)        Certification of the Principal Executive Officer
                        required by Rule 30a-2(a) under the Act.

                        Certification of the Principal Financial Officer
                        required by Rule 30a-2(a) under the Act.

Exhibit 12(b)(1)        Certification required by Rule 30a-2(b) under the Act.