SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D
                   Under the Securities Exchange Act of 1934
                               (Amendment No. 4)

                        First Trust Mortgage Income Fund
                                    ( FMY )
-------------------------------------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
-------------------------------------------------------------------------------
                         (Title of Class of Securities)

                                   33734E103
-------------------------------------------------------------------------------
                                 (CUSIP Number)

                               Paul E. Rasmussen
                                3300 IDS Center
                             80 South Eighth Street
                           Minneapolis, MN 55402-4130
-------------------------------------------------------------------------------
                 (Name, Address, and Telephone Number of Person
               Authorized to Receive Notices and Communications)

                               October 12, 2016
-------------------------------------------------------------------------------
            (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of sections 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g),
check the following box. [X]

Note: Schedules filed in paper format shall include a signed original and five
copies of the schedule, including all exhibits. See Rule 13d-7(b) for other
parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person's
initial filing on this form with respect to the subject class of securities, and
for an subsequent amendment containing information which would alter
disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section
of the Act but shall be subject to all other provisions of the Act (however,
see the Notes).



CUSIP No. 33734E103
-------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON

     Sit Investment Associates, Inc.
-------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) [ ]
                                                                         (b) [x]
-------------------------------------------------------------------------------
3    SEC USE ONLY
-------------------------------------------------------------------------------
4    SOURCE OF FUNDS (See Instructions)
         00
-------------------------------------------------------------------------------
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) or 2(e)                        [ ]
-------------------------------------------------------------------------------
6    CITIZENSHIP OR PLACE OF ORGANIZATION

     Incorporated in Minnesota
-------------------------------------------------------------------------------
                    7     SOLE VOTING POWER
   NUMBER OF
   SHARES           -----------------------------------------------------------
   BENEFICIALLY     8     SHARED VOTING POWER
   OWNED BY
   EACH                   1,459,479 Shares
   REPORTING        -----------------------------------------------------------
   PERSON           9     SOLE DISPOSITIVE POWER
   WITH
                    -----------------------------------------------------------
                    10    SHARED DISPOSITIVE POWER

                          1,459,479 Shares
-------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,459,479 Shares
-------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
     (See instructions)                                                 [ ]

-------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     34.64%
-------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON (See Instructions)

     IA
-------------------------------------------------------------------------------



CUSIP No. 33734E103
-------------------------------------------------------------------------------
1    NAME OF REPORTING PERSON

     Sit Fixed Income Advisors II, LLC
-------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) [ ]
                                                                         (b) [x]
-------------------------------------------------------------------------------
3    SEC USE ONLY
-------------------------------------------------------------------------------
4    SOURCE OF FUNDS (See Instructions)
         00
-------------------------------------------------------------------------------
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEMS 2(d) or 2(e)                        [ ]
-------------------------------------------------------------------------------
6    CITIZENSHIP OR PLACE OF ORGANIZATION

     Incorporated in Minnesota
-------------------------------------------------------------------------------
                    7     SOLE VOTING POWER
   NUMBER OF
   SHARES           -----------------------------------------------------------
   BENEFICIALLY     8     SHARED VOTING POWER
   OWNED BY
   EACH                   1,459,479 Shares
   REPORTING        -----------------------------------------------------------
   PERSON           9     SOLE DISPOSITIVE POWER
   WITH
                    -----------------------------------------------------------
                    10    SHARED DISPOSITIVE POWER

                          1,459,479 Shares
-------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     1,459,479 Shares
-------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES
     (See instructions)                                                 [ ]

-------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

     34.64%
-------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON (See Instructions)

     IA
-------------------------------------------------------------------------------



ITEM 1   Security and Issuer

         Common Stock

         First Trust Mortgage Income Fund
         First Trust Advisors L.P.
         120 East Liberty Drive, Suite 400
         Wheaton, IL 60187

ITEM 2   Identity and Background

         a) and c)

            This statement is filed by:

            Sit Investment Associates, Inc., a Minnesota corporation (SIA), and
            Sit Fixed Income Advisors II, LLC, a Delaware limited liability
            company (SFI).
            Both SIA and SFI are parties to a Joint Filing Agreement as further
            described in Exhibit B to the initial Schedule 13D filed by SIA and
            SFI on March 18, 2015.

            SIA is a registered investment adviser.
            SFI is a registered investment adviser and subsidiary of SIA.

            SIA or SFI serves as investment adviser on behalf of its clients
            pursuant to investment management agreements with each of its
            clients which give SIA or SFI full discretionary authority to direct
            the investments of its client in accordance with the investment
            objectives and restrictions of the client. The investment management
            agreements also provide that SIA or SFI has assumed the
            responsibility to vote on behalf of its clients all shares held by
            its clients in accounts managed by SIA or SFI.

            Roger J. Sit is chairman and CEO of SIA and SFI.
            Michael C. Brilley is senior vice President of SIA and director,
            president and chief fixed income officer of SFI.
            Mr. Ronald D. Sit is a vice president of SIA and director.
            Mr. Ralph L. Strangis is a director of SIA and SFI. Mr. Strangis is
            a partner with the law firm Kaplan Strangis & Kaplan, P.A.

            By virtue of these positions, each of SIA, SFI, Mr. Roger Sit, Mr.
            Brilley, Mr. Ronald Sit, and Mr. Strangis, may be deemed to
            beneficially own the Shares held by SIA and SFI. None of the named
            individuals own shares directly. Additionally, Mr. Strangis is not
            involved in investment or voting decisions. Together SIA, SFI, Mr.
            Roger Sit, Mr. Brilley, Mr. Ronald Sit, and Mr. Strangis are the
            "Sit Entities".

         b) The business address of each of the Sit Entities is 3300 IDS Center,
            80 South Eighth Street, Minneapolis, MN 55402

         d) During the last five years, neither Roger J. Sit, Michael C.
            Brilley, Ronald D. Sit, nor Ralph L. Strangis, have been convicted
            in a criminal proceeding (excluding traffic violations or similar
            misdemeanors).

         e) During the last five years, none of the Sit Entities have been a
            party to a civil proceeding of a judicial or administrative body of
            competent jurisdiction and as a result of such proceeding was or is
            subject to a judgment, decree, or final order enjoining future
            violations of, or prohibiting or mandating activities subject to,
            federal or state securities laws or finding any violation with
            respect to such laws.

         f) Roger J. Sit, Michael C. Brilley, Ronald D. Sit, and Ralph L.
            Strangis are United States citizens.

ITEM 3   Source and Amount of Funds or Other Consideration

         The Sit Entities acquired the Issuer's Shares in open market
         transactions with client funds held in custody accounts managed by SIA
         and SFI.

ITEM 4   Purpose of Transaction

         The Sit Entities have acquired the Issuer's Shares for investment
         purposes, and such purchases have been made in the ordinary course of
         business. The Issuer's Shares have been acquired on behalf of SIA's and
         SFI's clients.

         In pursuing such investment purposes, the Sit Entities purchased the
         Shares based on the Sit Entities' belief that the Shares represented an
         attractive investment opportunity, and the Sit Entities may further
         purchase, hold, vote, trade, sell or otherwise deal in the Shares at
         the time, and in such manner, as they deem advisable to benefit from,
         among many things, changes in market prices of such Shares, the market
         prices of such Shares relative to the value of the Issuer's assets,
         changes in the Issuer's investment strategy, and composition of the
         Issuer's portfolio.

         None of Sit Entities have any present plan or proposal which would
         relate to or result in any of the matters set forth in subparagraphs
         (a) - (j) of Item 4 of Schedule 13D except as set forth herein or such
         as would occur upon or in connection with completion of, or following,
         any of the actions discussed herein.

         The Sit Entities intend to review their investment in the Issuer's
         Shares on a continuing basis and may from time to time engage in
         discussion with management, the Board of Directors and shareholders
         concerning, among other things, the Issuer's performance, the market
         prices of the Issuer's Shares relative to the value of the Issuer's
         assets, the Issuer's investment strategy and the Issuer's portfolio
         holdings.

ITEM 5   Interest in Securities of the Issuer

         a) and b)

            The aggregate percentage of Shares reported owned by Sit Entities
            herein is based upon 4,213,115 Shares outstanding as of April 30,
            2016, which is the total number of Shares outstanding as reported in
            the Issuer's Form N-CSR dated April 30, 2016 and filed on July 5,
            2016.

            As of the date hereof, the Sit Entities may be deemed to be the
            beneficial owner of 1,459,479 Shares held in client accounts which
            represent 34.64% of the Issuer's outstanding Shares. Each of the Sit
            Entities may be deemed to have shared power to vote and dispose of
            such Shares. However, none of SIA's or SFI's client accounts own
            more than 5% of the Shares outstanding, and none of SIA's or SFI's
            directors or executive officers own Shares directly.

         c) Transactions in Shares by the Sit Entities since the last 13D filing
            on September 13, 2016 are set forth in Exhibit A.

         d) The clients of SIA and SFI have the right to participate in the
            receipt of dividends from, or proceeds from the sales of, the Shares
            held for their respective accounts.

         e) Not applicable


ITEM 6   Contracts, Arrangements, Understandings, or Relationships with Respect
         to Securities of the Issuer

         Not applicable.

ITEM 7   Materials to be Filed as Exhibits

         Exhibit A: Schedule of Transactions in Shares by Sit Entities since the
         last 13D filing on September 13, 2016.

Signature

         After reasonable inquiry and to the best of my knowledge and belief, I
         certify that the information set forth in this statement is true,
         complete, and correct.
------------------
October 13, 2016

By:   Sit Investment Associates, Inc.
      /s/ Roger J. Sit
      -----------------------------------
      Name/Title: Roger J. Sit, Chairman & CEO

By:   Sit Fixed Income Advisors II, LLC
      /s/ Michael C. Brilley
      -----------------------------------
      Name/Title: Michael C. Brilley, President & CIO



                                   EXHIBIT A

Schedule of Transactions in Shares by Sit Entities since the last 13D filing on
September 13, 2016:

-------------------- ------------------ -------------------- ----------------
                                          Shares of Common
                       Transaction        Stock Purchased      Price Per
Date of Transaction    Type               /(Sold)              Share ($)
-------------------- ------------------ -------------------- ----------------
         09/13/2016         BUY                    2,640.00       14.37
-------------------- ------------------ -------------------- ----------------
         09/15/2016         BUY                      130.00       14.46
-------------------- ------------------ -------------------- ----------------
         09/19/2016         BUY                   10,000.00       14.54
-------------------- ------------------ -------------------- ----------------
         09/20/2016         BUY                    5,000.00       14.52
-------------------- ------------------ -------------------- ----------------
         09/21/2016         BUY                    2,693.00       14.34
-------------------- ------------------ -------------------- ----------------
         09/23/2016         BUY                      300.00       14.36
-------------------- ------------------ -------------------- ----------------
         09/28/2016         BUY                    1,155.00       14.42
-------------------- ------------------ -------------------- ----------------
         09/29/2016         BUY                    6,354.00       14.38
-------------------- ------------------ -------------------- ----------------
         10/03/2016         BUY                      188.00       14.44
-------------------- ------------------ -------------------- ----------------
         10/10/2016         BUY                    5,575.00       14.39
-------------------- ------------------ -------------------- ----------------
         10/11/2016         BUY                   30,000.00       14.37
-------------------- ------------------ -------------------- ----------------