<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
SCHEDULE 14D-1
TENDER OFFER STATEMENT PURSUANT TO SECTION 14(D)(1) OF THE SECURITIES EXCHANGE
ACT OF 1934
(AMENDMENT NO. 6)
ARAN ENERGY PLC
(NAME OF SUBJECT COMPANY)
ARCO IRISH HOLDINGS INC.
ATLANTIC RICHFIELD COMPANY
(BIDDER)
ORDINARY SHARES OF IR20P EACH AND
AMERICAN DEPOSITARY SHARES, EACH REPRESENTING 30 ORDINARY SHARES
(TITLE OF CLASS OF SECURITIES)
038-528-105
(CUSIP NUMBER OF CLASS OF SECURITIES)
DIANE A. WARD
ATLANTIC RICHFIELD COMPANY
515 SOUTH FLOWER STREET
LOS ANGELES, CALIFORNIA 90071
(213) 486-2808
(NAME, ADDRESS, AND TELEPHONE NUMBER OF PERSON AUTHORIZED TO RECEIVE NOTICES
AND COMMUNICATIONS ON BEHALF OF BIDDER)
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
This amends and supplements the Tender Offer Statement on Schedule 14D-1 of
ARCO Irish Holdings Inc. ("ARCO Irish Holdings") and Atlantic Richfield
Company ("ARCO"), both corporations incorporated under the laws of Delaware,
initially filed with the Securities and Exchange Commission (the "Commission")
on August 25, 1995, as amended by Amendment Nos. 1, 2, 3, 4 and 5 thereto
filed on September 8, 1995, September 14, 1995, September 20, 1995, September
25, 1995 and October 2, 1995 (collectively, the "Schedule 14D-1"), with
respect to the Offer by N M Rothschild & Sons Limited on behalf of ARCO Irish
Holdings, a wholly owned subsidiary of ARCO, to acquire the entire share
capital of Aran Energy plc, including all American Depositary Shares.
ITEM 10. ADDITIONAL INFORMATION.
(f) The information set forth in the press release dated October 3, 1995
issued by ARCO Irish Holdings Inc. and Atlantic Richfield Company, a copy of
which is attached hereto as Exhibit (a)(16.7), is incorporated by reference in
its entirety.
ITEM 11. MATERIAL TO BE FILED AS EXHIBIT.
Item 11(a) is amended by adding the following exhibit:
(a)(16.7) Text of press release dated October 3, 1995.
1
<PAGE>
After due inquiry and to the best of its knowledge and belief, each of the
undersigned certifies that the information set forth in this statement is
true, complete and correct.
Date: October 3, 1995 Atlantic Richfield Company
By /s/ Terry G. Dallas
_____________________________________
Vice President & Treasurer
ARCO Irish Holdings Inc.
By /s/ Terry G. Dallas
_____________________________________
Senior Vice President
2
<PAGE>
EXHIBIT INDEX
<TABLE>
<CAPTION>
EXHIBIT
NUMBER DESCRIPTION OF DOCUMENT
------- -----------------------
<C> <S>
(a)(16.7) Text of press release dated October 3, 1995
</TABLE>
<PAGE>
EXHIBIT(a)(16.7)
[LETTERHEAD OF N M ROTHSCHILD & SONS LIMITED]
PRESS RELEASE
NOT FOR RELEASE, PUBLICATION OR DISTRIBUTION
IN OR INTO AUSTRALIA, CANADA OR JAPAN
FOR IMMEDIATE RELEASE 3 October 1995
ARAN'S "INDEPENDENT" VALUATION STRAINS CREDIBILITY
In response to Aran's document published today Mr. Terry Dallas, Director of
ARCO Irish Holdings, commented:
"Aran's "independent" valuation strains credibility and should be
dismissed. It is all too easy to present exploration and development
prospects in a highly creative and attractive manner. While we give Aran
marks for their colourful presentation, the facts remain that exploration
acreage is by its very nature speculative, high risk and subject to
significant costs with no certainty of success.
Their creativity extends to the valuation of Schiehallion. Aran has
attributed to this undeveloped field a value per barrel more than 25%
higher than has been paid on average in 1995 for barrels which are actually
in production in the UK North Sea. Aran continues to refuse to provide hard
facts on Schiehallion instead relying on "information not generally in the
public domain," when making assumptions on its working interest in the
field and the field's estimated reserves and development costs.
ARCO is pleased that the Takeover Panel has ruled that the proposed joint
venture with Statoil on Connemara falls under Rule 21 "Restrictions on
Frustrating Action" and has compelled Aran to hold an EGM on the matter."
- END -
<TABLE>
<S> <C>
PRESS ENQUIRIES:
ARCO
Terry Dallas Telephone: (44) 171 831 3113
N M ROTHSCHILD & SONS LIMITED Telephone: (44) 171 280 5000
Nicholas Wrigley
Tony Allen
PUBLIC RELATIONS:
WHPR Telephone: (353) 1 496 0244
Brian Bell
FINANCIAL DYNAMICS
Nick Miles Telephone: (44) 171 831 3113
Marc Popiolek Telephone: (44) 171 831 3113
</TABLE>
New Court, St. Swithin's Lane, London EC4P 4DU
Telephone 0171-280 5000 Fax 0171-929 1643 Telex 888031
Regulated by SFA
