content: <PAGE>
                                                      +--------------------------+
                                                      |       OMB APPROVAL       |
                                                      |  OMB Number: 3235-0101   |
                                                      | Expires: August 31, 2003 |
                                                      +--------------------------+
  
                                    UNITED STATES
                         SECURITIES AND EXCHANGE COMMISSION
                                WASHINGTON, DC 20549
  
                                      FORM 144
  
                        NOTICE OF PROPOSED SALE OF SECURITIES
                PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
  
  ATTENTION: TRANSMIT FOR FILING 3 COPIES OF THIS FORM CONCURRENTLY WITH EITHER
             PLACING AN ORDER WITH A BROKER TO EXECUTE A SALE OR EXECUTING A SALE
             DIRECTLY WITH A MARKET MAKER.
  
  <TABLE>
  <S>     <C>
  ------------------------------------------------------------------------------------------------------------------------------------
   1(a) NAME OF ISSUER (Please type or print)                  (b) IRS IDENT. NO.       (c) S.E.C. FILE NO.
        Advanced Cell Technology                                    87-0656515
  
  ------------------------------------------------------------------------------------------------------------------------------------
    (d) ADDRESS OF ISSUER                   STREET           CITY           STATE           ZIP CODE             (e) TELEPHONE NO.
                                                                                                              ------------------------
        1201 Harbor Bay Parkway             Alameda           CA            94501                                 (510)  748-4900
  
  ------------------------------------------------------------------------------------------------------------------------------------
   2(a) NAME OF PERSON FOR WHOSE ACCOUNT THE        (b) I.R.S. NO.     (c) RELATIONSHIP       (d) ADDRESS STREET CITY STATE ZIP CODE
        SECURITIES ARE TO BE SOLD                                          TO ISSUER
  Bristol Investment Fund, Ltd.                       98-0335509           Shareholder            Caledonian Fund Services Limited,
                                                                                                  69 Dr. Roy's Dr. George Town,
                                                                                                  Grand Cayman, Cayman Islands
  ------------------------------------------------------------------------------------------------------------------------------------
  INSTRUCTION: The person filing this notice should contact the issuer to obtain the I.R.S. Identification Number
               and the SEC File Number
  ------------------------------------------------------------------------------------------------------------------------------------
                          Name and Address of        SEC USE
  Title of the Class      Each Broker Through         ONLY
   of Securities To    whom the Securities Are      ---------   Number of Shares or    Aggregate Market
  Be Sold (See instr.   To Be Offered or Each        Broker-     Other Units To Be          Value
       3(a))             Market Maker who is         Dealer           Sold             (See instr. 3(d))
                       Acquiring the Securities       File       (See instr. 3(c))
                          (See instr. 3(b))          Number
  ------------------------------------------------------------------------------------------------------------------------------------
  Common Stock      Citigroup Prime Broker
                    390 Greenwich Street, 3rd Floor                  144,253               $95,206
                    New York, NY 10013
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
   Number of
   Shares or        Approximate Date of        Name of Each Securities
  Other Units              Sale                       Exchange
  Outstanding         (See instr. 3(f))           (See instr. 3(g))
  (See instr.          (MO. DAY  YR.)
     3(e))
  ------------------------------------------------------------------------------------------------------------------------------------
  49,474,592              6/1/2007                    OTC BB
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
  INSTRUCTIONS:
     1.  (a) Name of issuer.
         (b) Issuer's IRS Identification Number.
         (c) Issuer's SEC file number, if any.
         (d) Issuer's address, including zip code.
         (e) Issuer's telephone number, including area code.
  
     2.  (a) Name of person for whose account the securities are to be sold.
         (b) Such person's or I.R.S. Identification number, if such a person is an
             entity.
         (c) Such person's relationship to the issuer (e.g., officer, director,
             10 percent stockholder, or member of immediate family of any of the
             foregoing).
         (d) Such person's address, including zip code.
  
     3.  (a) Title of the class of securities to be sold
         (b) Name and address of each broker through whom the securities are
             intended to be sold.
         (c) Number of shares or other units to be sold (if debt securities,
             give the aggregate face amount).
         (d) Aggregate market value of the securities to be sold as of a specified
             date within 10 days prior to the filing of this notice.
         (e) Number of shares or other units of the class outstanding, or if debt
             securities the face amount thereof outstanding, as shown by the most
             recent report or statement published by the issuer.
         (f) Approximate date on which the securities are to be sold.
         (g) Name of each securities exchange, if any, on which the securities are
             intended to be sold.
  
                                         2
  <PAGE>
  
                           TABLE I--SECURITIES TO BE SOLD
  
  Furnish the following information with respect to the acquisition of the
  securities to be sold and with respect to the payment of all or any part of the
  purchase price or other consideration therefor:
  
  ------------------------------------------------------------------------------------------------------------------------------------
       Title of    Date You    Nature of Acquisition    Name of Person >From        Amount of         Date of      Nature of Payment
      the Class    Acquired       Transaction             Whom Acquired            Securities        Payment
                                                        (If Gift, Also Give        Acquired
                                                        Date Donor Acquired)
  ------------------------------------------------------------------------------------------------------------------------------------
  Common Stock      9/16/05      Convertible Note             Issuer                144,253          9/16/05           Cash
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
  INSTRUCTIONS:
   1. If the securities were purchased and full payment therefore was not made in
      cash at the time of purchase, explain in the table or in a note thereto the
      nature of the consideration given. If the consideration consisted of any
      note or other obligation, or if payment was made in installments describe
      the arrangement and state when the note or other obligation was discharged
      in full or the last installment paid.
   2. If within two years after the acquisition of the securities the person for
      whose account they are to be sold had any short positions, put or other
      option to dispose of securities referred to in paragraph (d)(3) of Rule 144,
      furnish full information with respect thereto.
  
  ====================================================================================================================================
  
               TABLE II--SECURITIES SOLD DURING THE PAST THREE MONTHS
  
  Furnish The Following Information as to All Securities of The Issuer Sold During
                The Past Three Months By The Person For Whose Account
                           The Securities Are To Be Sold.
  
  ------------------------------------------------------------------------------------------------------------------------------------
     Name and Address of Seller             Title of Securities Sold         Date of Sale         Amount of        Gross Proceeds
                                                                                                 Securities
                                                                                                    Sold
  ------------------------------------------------------------------------------------------------------------------------------------
  Bristol Investment Fund, Ltd.
  Caledonian Fund Services Limited,         Advanced Cell Technology, Inc.     4/11/2007            31,377            $25,101
  69 Dr. Roy's Dr.                          Advanced Cell Technology, Inc.     4/12/2007             5,000             $3,925
  George Town, Grand Cayman,                Advanced Cell Technology, Inc.     5/10/2007            62,500            $42,265
  Cayman Islands                            Advanced Cell Technology, Inc.     5/11/2007            34,500            $23,586
  
  ------------------------------------------------------------------------------------------------------------------------------------
  REMARKS:
  
  INSTRUCTIONS:
   See the definition of "person" in paragraph (a) of Rule 144. Information is to
   be given not only as to the person for whose account the securities are to be
   sold but also as to all other persons included in that definition. In addition,
   information shall be given as to sales by all persons whose sales are required
   by paragraph (e) of Rule 144 to be aggregated with sales for the account of the
   person filing this notice.
                                    June 1, 2007
                      ----------------------------------------
                                  (DATE OF NOTICE)
  ATTENTION:
   The person for whose account the securities to which this notice relates are to
   be sold hereby represents by signing this notice that he does not know any
   material adverse information in regard to the current and prospective
   operations of the issuer of the securities to be sold which has not been
   publicly disclosed.
                                    Paul Kessler
                      ----------------------------------------
                                     (SIGNATURE)
  
   The notice shall be signed by the persons for whose account the securities are
                           to be sold. At least one copy
    of the notice shall be manually signed. Any copies not manually signed shall
                         bear typed or printed signatures.
  
   ATTENTION: INTERNATIONAL MISSTATEMENTS OR OMISSION OF FACTS CONSTITUTE FEDERAL
                     CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001).
  
  </TABLE>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "bristol_advcell144-060107.txt", "secsgml_size_bytes": 11714}]
text: +--------------------------+
                                                      |       OMB APPROVAL       |
                                                      |  OMB Number: 3235-0101   |
                                                      | Expires: August 31, 2003 |
                                                      +--------------------------+
  
                                    UNITED STATES
                         SECURITIES AND EXCHANGE COMMISSION
                                WASHINGTON, DC 20549
  
                                      FORM 144
  
                        NOTICE OF PROPOSED SALE OF SECURITIES
                PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
  
  ATTENTION: TRANSMIT FOR FILING 3 COPIES OF THIS FORM CONCURRENTLY WITH EITHER
             PLACING AN ORDER WITH A BROKER TO EXECUTE A SALE OR EXECUTING A SALE
             DIRECTLY WITH A MARKET MAKER.
  ------------------------------------------------------------------------------------------------------------------------------------
   1(a) NAME OF ISSUER (Please type or print)                  (b) IRS IDENT. NO.       (c) S.E.C. FILE NO.
        Advanced Cell Technology                                    87-0656515
  
  ------------------------------------------------------------------------------------------------------------------------------------
    (d) ADDRESS OF ISSUER                   STREET           CITY           STATE           ZIP CODE             (e) TELEPHONE NO.
                                                                                                              ------------------------
        1201 Harbor Bay Parkway             Alameda           CA            94501                                 (510)  748-4900
  
  ------------------------------------------------------------------------------------------------------------------------------------
   2(a) NAME OF PERSON FOR WHOSE ACCOUNT THE        (b) I.R.S. NO.     (c) RELATIONSHIP       (d) ADDRESS STREET CITY STATE ZIP CODE
        SECURITIES ARE TO BE SOLD                                          TO ISSUER
  Bristol Investment Fund, Ltd.                       98-0335509           Shareholder            Caledonian Fund Services Limited,
                                                                                                  69 Dr. Roy's Dr. George Town,
                                                                                                  Grand Cayman, Cayman Islands
  ------------------------------------------------------------------------------------------------------------------------------------
  INSTRUCTION: The person filing this notice should contact the issuer to obtain the I.R.S. Identification Number
               and the SEC File Number
  ------------------------------------------------------------------------------------------------------------------------------------
                          Name and Address of        SEC USE
  Title of the Class      Each Broker Through         ONLY
   of Securities To    whom the Securities Are      ---------   Number of Shares or    Aggregate Market
  Be Sold (See instr.   To Be Offered or Each        Broker-     Other Units To Be          Value
       3(a))             Market Maker who is         Dealer           Sold             (See instr. 3(d))
                       Acquiring the Securities       File       (See instr. 3(c))
                          (See instr. 3(b))          Number
  ------------------------------------------------------------------------------------------------------------------------------------
  Common Stock      Citigroup Prime Broker
                    390 Greenwich Street, 3rd Floor                  144,253               $95,206
                    New York, NY 10013
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
   Number of
   Shares or        Approximate Date of        Name of Each Securities
  Other Units              Sale                       Exchange
  Outstanding         (See instr. 3(f))           (See instr. 3(g))
  (See instr.          (MO. DAY  YR.)
     3(e))
  ------------------------------------------------------------------------------------------------------------------------------------
  49,474,592              6/1/2007                    OTC BB
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
  INSTRUCTIONS:
     1.  (a) Name of issuer.
         (b) Issuer's IRS Identification Number.
         (c) Issuer's SEC file number, if any.
         (d) Issuer's address, including zip code.
         (e) Issuer's telephone number, including area code.
  
     2.  (a) Name of person for whose account the securities are to be sold.
         (b) Such person's or I.R.S. Identification number, if such a person is an
             entity.
         (c) Such person's relationship to the issuer (e.g., officer, director,
             10 percent stockholder, or member of immediate family of any of the
             foregoing).
         (d) Such person's address, including zip code.
  
     3.  (a) Title of the class of securities to be sold
         (b) Name and address of each broker through whom the securities are
             intended to be sold.
         (c) Number of shares or other units to be sold (if debt securities,
             give the aggregate face amount).
         (d) Aggregate market value of the securities to be sold as of a specified
             date within 10 days prior to the filing of this notice.
         (e) Number of shares or other units of the class outstanding, or if debt
             securities the face amount thereof outstanding, as shown by the most
             recent report or statement published by the issuer.
         (f) Approximate date on which the securities are to be sold.
         (g) Name of each securities exchange, if any, on which the securities are
             intended to be sold.
  
                                         2
  TABLE I--SECURITIES TO BE SOLD
  
  Furnish the following information with respect to the acquisition of the
  securities to be sold and with respect to the payment of all or any part of the
  purchase price or other consideration therefor:
  
  ------------------------------------------------------------------------------------------------------------------------------------
       Title of    Date You    Nature of Acquisition    Name of Person >From        Amount of         Date of      Nature of Payment
      the Class    Acquired       Transaction             Whom Acquired            Securities        Payment
                                                        (If Gift, Also Give        Acquired
                                                        Date Donor Acquired)
  ------------------------------------------------------------------------------------------------------------------------------------
  Common Stock      9/16/05      Convertible Note             Issuer                144,253          9/16/05           Cash
  
  ------------------------------------------------------------------------------------------------------------------------------------
  
  INSTRUCTIONS:
   1. If the securities were purchased and full payment therefore was not made in
      cash at the time of purchase, explain in the table or in a note thereto the
      nature of the consideration given. If the consideration consisted of any
      note or other obligation, or if payment was made in installments describe
      the arrangement and state when the note or other obligation was discharged
      in full or the last installment paid.
   2. If within two years after the acquisition of the securities the person for
      whose account they are to be sold had any short positions, put or other
      option to dispose of securities referred to in paragraph (d)(3) of Rule 144,
      furnish full information with respect thereto.
  
  ====================================================================================================================================
  
               TABLE II--SECURITIES SOLD DURING THE PAST THREE MONTHS
  
  Furnish The Following Information as to All Securities of The Issuer Sold During
                The Past Three Months By The Person For Whose Account
                           The Securities Are To Be Sold.
  
  ------------------------------------------------------------------------------------------------------------------------------------
     Name and Address of Seller             Title of Securities Sold         Date of Sale         Amount of        Gross Proceeds
                                                                                                 Securities
                                                                                                    Sold
  ------------------------------------------------------------------------------------------------------------------------------------
  Bristol Investment Fund, Ltd.
  Caledonian Fund Services Limited,         Advanced Cell Technology, Inc.     4/11/2007            31,377            $25,101
  69 Dr. Roy's Dr.                          Advanced Cell Technology, Inc.     4/12/2007             5,000             $3,925
  George Town, Grand Cayman,                Advanced Cell Technology, Inc.     5/10/2007            62,500            $42,265
  Cayman Islands                            Advanced Cell Technology, Inc.     5/11/2007            34,500            $23,586
  
  ------------------------------------------------------------------------------------------------------------------------------------
  REMARKS:
  
  INSTRUCTIONS:
   See the definition of "person" in paragraph (a) of Rule 144. Information is to
   be given not only as to the person for whose account the securities are to be
   sold but also as to all other persons included in that definition. In addition,
   information shall be given as to sales by all persons whose sales are required
   by paragraph (e) of Rule 144 to be aggregated with sales for the account of the
   person filing this notice.
                                    June 1, 2007
                      ----------------------------------------
                                  (DATE OF NOTICE)
  ATTENTION:
   The person for whose account the securities to which this notice relates are to
   be sold hereby represents by signing this notice that he does not know any
   material adverse information in regard to the current and prospective
   operations of the issuer of the securities to be sold which has not been
   publicly disclosed.
                                    Paul Kessler
                      ----------------------------------------
                                     (SIGNATURE)
  
   The notice shall be signed by the persons for whose account the securities are
                           to be sold. At least one copy
    of the notice shall be manually signed. Any copies not manually signed shall
                         bear typed or printed signatures.
  
   ATTENTION: INTERNATIONAL MISSTATEMENTS OR OMISSION OF FACTS CONSTITUTE FEDERAL
                     CRIMINAL VIOLATIONS (SEE 18 U.S.C. 1001).