UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
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                                  SCHEDULE 13G

                    Under the Securities Exchange Act of 1934

                                (AMENDMENT NO.2)*


                                  Novavax, Inc.
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                                (NAME OF ISSUER)


                                  Common Stock
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                         (TITLE OF CLASS OF SECURITIES)


                                    670002104
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                                 (CUSIP NUMBER)


                                   12/31/2010
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             (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

                  |X|   Rule 13d-1(b)
                  |_|   Rule 13d-1(c)
                  |_|   Rule 13d-1(d)

* 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 any subsequent amendment containing information which would alter the
disclosures provided in a prior cover page.

The information required in 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.
      670002104
---------------

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1     NAME OF REPORTING PERSON
            Hartford Series Fund, Inc. on behalf of:
            Hartford Capital Appreciation HLS Fund

      S.S. OR I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (entities only)
      22-2481744

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2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (see instructions)

            (a) |_|
            (b) |_|

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3     SEC USE ONLY
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4     CITIZENSHIP OR PLACE OF ORGANIZATION
            Maryland

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                  5      SOLE VOTING POWER
NUMBER OF
SHARES            --------------------------------------------------------------
BENEFICIALLY      6      SHARED VOTING POWER
OWNED BY                      7,157,990
EACH              --------------------------------------------------------------
REPORTING         7      SOLE DISPOSITIVE POWER
PERSON WITH:      --------------------------------------------------------------
                  8      SHARED DISPOSITIVE POWER
                              7,157,990
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9     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
            7,157,990

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10    CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES (see
      instructions)

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11    PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)
            6.41%
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12    TYPE OF REPORTING PERSON (see instructions)
            IV
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                                  Page 2 of 5


CUSIP NO.
      670002104
---------------


Item 1(a).  Name of Issuer:
                        Novavax, Inc.

Item 1(b).  Address of Issuer's Principal Executive Offices:

                  9920 Belward Campus Drive
                  Rockville, MD 20850

Item 2(a).  Name of Person(s) Filing:
                  Hartford Series Fund, Inc. on behalf of:
                  Hartford Capital Appreciation HLS Fund

Item 2(b).  Address of Principal Business Office or; if none, residence:
                  500 Bielenberg Drive
                  Woodbury, MN 55125-1400

Item 2(c).  Citizenship:
                  Maryland

Item 2(d).  Title of Class of Securities:
                  Common Stock

Item 2(e).  CUSIP Number:
                  670002104

Item 3.     If this statement is filed pursuant to ss.ss.240.13d-1(b) or
            240.13d-2(b) or (c), check whether the person filing is a:

            (a)   |_| Broker or Dealer registered under Section 15 of the Act
                  (15 U.S.C. 78o).

            (b)   |_| Bank as defined in Section 3(a)(6) of the Act (15 U.S.C.
                  78c).

            (c)   |_| Insurance Company as defined in Section 3(a) (19) of the
                  Act (15 U.S.C. 78c).

            (d)   |X| Investment Company registered under Section 8 of the
                  Investment Company Act of 1940 (15 U.S.C. 80a-8).


                                  Page 3 of 5


CUSIP NO.
      670002104
---------------

            (e)   |_| An investment adviser in accordance with
                  ss.240.13d-1(b)(1)(ii)(E);

            (f)   |_| An employee benefit plan or endowment fund in accordance
                  with ss.240.13d-1(b)(1)(ii)(F);

            (g)   |_| A parent holding company or control person in accordance
                  with ss.240.13d-1(b)(1)(ii)(G);

            (h)   |_| A savings association as defined in Section 3(b) of the
                  Federal Deposit Insurance Act (12 U.S.C. 1813);

            (i)   |_| A church plan that is excluded from the definition of an
                  investment company under Section 3(c)(14) of the Investment
                  Company Act of 1940 (15 U.S.C. 80a-3);

            (j)   |_| Group, in accordance with ss.240.13d-1(b)(1)(ii)(J).


Item 4.     Ownership:

            Provide the following information regarding the aggregate number and
            percentage of the class of securities of the issuer identified in
            Item 1.

            (a)   Amount Beneficially Owned 7,157,990
                                            ---------
            (b)   Percent of Class  6.41%
                                   -------
            (c)   Number of shares as to which such person has:

                  (i)   sole power to vote or to direct the vote
                        --------------------------------------------------------
                  (ii)  shared power to vote or to direct the vote
                              7,157,990
                        --------------------------------------------------------
                  (iii) sole power to dispose or to direct the disposition of

                        --------------------------------------------------------
                  (iv)  shared power to dispose or to direct the disposition of
                              7,157,990
                        --------------------------------------------------------


                                  Page 4 of 5


CUSIP NO.
      670002104
---------------

Item 5.     Ownership of Five Percent or Less of a Class:

            If this statement is being filed to report the fact that as of the
            date hereof the reporting person has ceased to be the beneficial
            owner of more than five percent of the class of securities, check
            the following: |_|

Item 6.     Ownership of More than Five Percent on behalf of Another Person: N/A

Item 7.     Identification and Classification of the Subsidiary which Acquired
            the Security being Reported on by the Parent Holding Company: N/A

Item 8.     Identification and Classification of Members of the Group:  N/A

Item 9.     Notice of Dissolution of Group: N/A

Item 10.    Certification:

            By signing below I certify that, to the best of my knowledge and
belief, the securities referred to above were acquired and are held in the
ordinary course of business and were not acquired and are not held for the
purpose of or with the effect of changing or influencing the control of the
issuer of the securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose or effect.


            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.


                              DATE:  February 10, 2011

                              Hartford Series Fund, Inc. on behalf of:
                              Hartford Capital Appreciation HLS Fund



                              BY: /s/ Colleen B. Pernerewski
                                  --------------------------
                                  Colleen B. Pernerewski
                                  Vice President and Chief Compliance Officer


                                  Page 5 of 5