sec document

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

                                   SCHEDULE TO
                                 (RULE 14d-100)
          TENDER OFFER STATEMENT UNDER SECTION 14(d)(1) OR 13(e)(1) OF
                       THE SECURITIES EXCHANGE ACT OF 1934
                                (AMENDMENT NO. 4)

                            ------------------------

                               BAIRNCO CORPORATION
                            (Name of Subject Company)

                            ------------------------

                              BZ ACQUISITION CORP.
                             STEEL PARTNERS II, L.P.
                       (Names of Filing Persons--Offeror)

                      ------------------------------------

                     COMMON STOCK, PAR VALUE $0.01 PER SHARE
                         (Title of Class of Securities)

                            -------------------------

                                    057097107
                      (CUSIP Number of Class of Securities)

                            ------------------------

                             WARREN G. LICHTENSTEIN
                             STEEL PARTNERS II, L.P.
                         590 Madison Avenue, 32nd Floor
                               New York, NY 10022
                                 (212) 520-2300
                                 --------------
   (Name, Address and Telephone Number of Person Authorized to Receive Notices
                 and Communications on Behalf of Filing Persons)

                                   COPIES TO:
                              STEVEN WOLOSKY, ESQ.
                 OLSHAN GRUNDMAN FROME ROSENZWEIG & WOLOSKY LLP
                                Park Avenue Tower
                               65 East 55th Street
                            New York, New York 10022
                                 (212) 451-2300
                                 --------------

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     TRANSACTION VALUATION*                          AMOUNT OF FILING FEE**
--------------------------------------------------------------------------------
        $72,820,836.00                                        $7,792




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*    Estimated for purposes of calculating the amount of filing fee only.
     Transaction value derived by multiplying 6,068,403 (the maximum number of
     shares of common stock of subject company estimated to be acquired by
     Offeror) by $12.00 (the purchase price per share offered by Offeror).
**   The amount of the filing fee, calculated in accordance with Rule 0-11 of
     the Securities Exchange Act of 1934, as amended, and Fee Rate Advisory No.
     5 for fiscal year 2006, equals $107.00 per million dollars of transaction
     value.

|X|  Check box if any part of the fee is offset as provided by Rule 0-11(a)(2)
     and identify the filing with which the offsetting fee was previously paid.
     Identify the previous filing by registration statement number, or the Form
     or Schedule and the date of its filing.

                                                           BZ Acquisition
                                                           Corp. and Steel
Amount Previously Paid:    $7,792            Filing Party: Partners II, L.P.
Form or Registration No.:  Schedule TO       Date Filed:   June 22, 2006

|_|  Check the box if the filing relates solely to preliminary communications
made before the commencement of a tender offer.

     Check the  appropriate  boxes below to designate any  transactions to which
     the statement relates:

     |X| third-party tender offer subject to Rule 14d-1.
     |_| issuer tender offer subject to Rule 13e-4.
     |_| going-private transaction subject to Rule 13e-3.
     |_| amendment to Schedule 13D under Rule 13d-2.

Check the following box if the filing is a final amendment reporting the results
of the tender offer. |_|




ITEMS 1 THROUGH 9, AND ITEM 11.

      This  Amendment  No. 4  ("Amendment  No. 4") to Tender Offer  Statement on
Schedule TO (this "Schedule TO") amends and supplements the statement originally
filed  on June  22,  2006  by  Steel  Partners  II,  L.P.,  a  Delaware  limited
partnership ("Parent"),  and BZ Acquisition Corp. (the "Purchaser"),  a Delaware
corporation and a wholly owned subsidiary of Parent. This Schedule TO relates to
the offer by the Purchaser to purchase all  outstanding  shares of common stock,
par value $0.01 per share (the "Common  Stock"),  and the  associated  preferred
stock  purchase  rights (the "Rights" and,  together with the Common Stock,  the
"Shares"),  of Bairnco Corporation,  a Delaware corporation (the "Company"),  at
$12.00 per Share, net to the seller in cash,  without  interest,  upon the terms
and subject to the conditions set forth in the Offer to Purchase, dated June 22,
2006 (the "Offer to Purchase"), and in the related Letter of Transmittal, copies
of which are attached hereto as Exhibits (a)(1)(i) and (a)(1)(ii),  respectively
(which,  together  with any  amendments  or  supplements  thereto,  collectively
constitute the "Offer").  The information set forth in the Offer to Purchase and
the related  Letter of  Transmittal  is  incorporated  herein by reference  with
respect to Items 1 through 9 and 11 of this Schedule TO.  Capitalized terms used
but not  defined  herein  shall have the  meaning  assigned to such terms in the
Offer to Purchase.

      The Expiration  Date of the Offer has been extended to 5:00 P.M., New York
City  time,  on  Friday,  September  8,  2006.  All  references  in the Offer to
Purchase,  Letter of  Transmittal,  the Letter to Brokers,  Dealers,  Commercial
Banks, Trust Companies and Other Nominees,  and the Letter to Clients for use by
Brokers,  Dealers,  Commercial Banks, Trust Companies and Other Nominees, to the
Expiration Date as 5:00 P.M., New York City time, on Wednesday,  August 9, 2006,
are hereby  amended and restated to refer to the  Expiration  Date as 5:00 P.M.,
New York City time, on Friday, September 8, 2006.

       On  August 7,  2006,  the  waiting  period  under  the  Hart-Scott-Rodino
Antitrust  Improvements Act of 1976, as amended (the "HSR Act"), relating to the
Offer  expired.  Accordingly,  the  condition  to  the  Offer  relating  to  the
expiration of the waiting period under the HSR Act has been satisfied.

ITEM 10.    FINANCIAL STATEMENTS.

      Not applicable.

ITEM 11.    ADDITIONAL INFORMATION.

         On August 10, 2006,  Parent issued a press release  announcing  that it
has extended the Expiration Date of the Offer, as those terms are defined in the
Offer to Purchase,  to 5:00 P.M.,  New York City time,  on Friday,  September 8,
2006.  As of the close of  business on August 9, 2006,  2,075,995  Shares of the
Company  have been  tendered  in and not  withdrawn  from the  Offer.  The press
release also announced  that the required  waiting period under the HSR Act with
respect to the Offer has expired.  The press release issued by Parent announcing
the extension of the Offer and the  expiration  of the waiting  period under the
HSR Act is attached hereto as Exhibit (a)(5)(v).


ITEM 12.    EXHIBITS.


     (a)(1)(i)      Offer to Purchase dated June 22, 2006.*

     (a)(1)(ii)     Form of Letter of Transmittal.*

     (a)(1)(iii)    Form of Notice of Guaranteed Delivery.*

     (a)(1)(iv)     Form of Letter to Brokers, Dealers, Commercial Banks, Trust
                    Companies and Other Nominees.*

     (a)(1)(v)      Form of Letter to Clients for use by Brokers, Dealers,
                    Commercial Banks, Trust Companies and Other Nominees.*



     (a)(1)(vi)     Guidelines for Certification of Taxpayer Identification
                    Number on Substitute Form W-9.*

     (a)(1)(vii)    Form of summary advertisement, dated June 22, 2006.*

     (a)(5)(i)      Text of press release issued by Parent, dated June 15,
                    2006.*

     (a)(5)(ii)     Text of press release issued by Parent, dated June 22,
                    2006.*

     (a)(5)(iii)    Text of press release issued by Parent, dated June 26,
                    2006.*

     (a)(5)(iv)     Text of press  release  issued  by  Parent,  dated  July 21,
                    2006.*

     (a)(5)(v)      Text of press  release  issued by Parent,  dated  August 10,
                    2006.

     (b)            Not applicable.

     (c)            Not applicable.

     (d)            Joint Filing Agreement by and among Steel Partners II, L.P.,
                    Steel Partners, L.L.C. and Warren G. Lichtenstein dated
                    September 8, 2004.*

     (e)            Not applicable.

     (f)            Not applicable.

     (g)            Not applicable.

     (h)            Not applicable.

-------------
* Previously filed




                                    SIGNATURE

     After due 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.

Dated:  August 10, 2006


                                         STEEL PARTNERS II, L.P.

                                         By: Steel Partners, L.L.C.
                                             General Partner

                                         By: /s/ Warren G. Lichtenstein
                                             -----------------------------------
                                         Name: Warren G. Lichtenstein
                                         Title: Managing Member


                                         BZ ACQUISITION CORP.

                                         By: /s/ Warren G. Lichtenstein
                                             -----------------------------------
                                         Name: Warren G. Lichtenstein
                                         Title: President




                                  EXHIBIT INDEX


     (a)(1)(i)      Offer to Purchase dated June 22, 2006.*

     (a)(1)(ii)     Form of Letter of Transmittal.*

     (a)(1)(iii)    Form of Notice of Guaranteed Delivery.*

     (a)(1)(iv)     Form of Letter to Brokers, Dealers, Commercial Banks, Trust
                    Companies and Other Nominees.*

     (a)(1)(v)      Form of Letter to Clients for use by Brokers, Dealers,
                    Commercial Banks, Trust Companies and Other Nominees.*

     (a)(1)(vi)     Guidelines for Certification of Taxpayer Identification
                    Number on Substitute Form W-9.*

     (a)(1)(vii)    Form of summary advertisement, dated June 22, 2006.*

     (a)(5)(i)      Text of press release issued by Parent, dated June 15,
                    2006.*

     (a)(5)(ii)     Text of press release issued by Parent, dated June 22,
                    2006.*

     (a)(5)(iii)    Text of press release issued by Parent, dated June 26,
                    2006.*

     (a)(5)(iv)     Text of press  release  issued  by  Parent,  dated  July 21,
                    2006.*

     (a)(5)(v)      Text of press  release  issued by Parent,  dated  August 10,
                    2006.

     (b)            Not applicable.

     (c)            Not applicable.

     (d)            Joint Filing Agreement by and among Steel Partners II, L.P.,
                    Steel Partners, L.L.C. and Warren G. Lichtenstein dated
                    September 8, 2004.*

     (e)            Not applicable.

     (f)            Not applicable.

     (g)            Not applicable.

     (h)            Not applicable.

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* Previously filed