Perpetual Limited — Major Shareholding Notification 2005

Apr 17, 2005

Form 604

Corporations Law Section 671B

Notice of change of interests of substantial holder

To Company Name/Scheme	OAKTON LIMITED
ACN/ARSN	007 431 827
1.Details of substantial holder (1)
Name	PERPETUAL TRUSTEES AUSTRALIA LIMITED
ACN (if applicable)	000 431 827
There was a change in the interests of theSubstantial holder on	15/04/2005
The previous notice was given to the company on	$-15$ $/$ $-12$ $/$ $-2004$ $-$
The previous notice was dated	14 /12 /2004__

2. Previous and present voting power

The total number of votes attached to all the voting shares in the company or voting interests in the scheme that the substantial holder or an associate (2) had a relevant interest (3) in when last required, and when now required, to give a substantial holding notice to the company or scheme, are as follows:

Class of securities (4)	Previous notice		Present notice
	Person's votes	Voting power (5)	Person's votes	Voting power (5)
Ordinary	9,824,186	12.17%	9,026,686	11.11%

3. Changes in relevant interests

Particulars of each change in, or change in the nature of, a relevant interest of the substantial holder or an associate in voting securities of the company or scheme, since the substantial holder was last required to give substantial holding notice to the company or scheme are as follows:

Date of change	Person whose relevantinterest changed	Nature ofchange (6)	Considerationgiven in relationto change $(7)$	Class andnumber ofsecurities affected	Person's votesaffected
	Refer annexure 3

4. Present relevant interests

Particulars of each relevant interest of the substantial holder in voting securities after the change are as follows:

Holder ofrelevantinterest	Registered holder ofsecurities	Person entitledto be registeredas holder (8)	Nature of relevantinterest $(6)$	Class andnumber ofsecurities	Person's votes
	Refer annexure 1 & 2

5. Changes in association

The persons who have become associates $(2)$ of, ceased to be associates of, or have changed the nature of their association $(9)$ with, the substantial holder in relation to voting interests in the company or scheme are

Name and ACN (if applicable)	Nature of association
Refer to Annexure 1

6. Addresses

The addresses of persons named in this form are as follows:

Name	Address
Refer to Annexure 1

Signature

Print name GLENDA CHARLES Capacity ASST. COMPANY SECRETARY

Perpetual Investments Account Codes & Details

Perpetual Investments Management Limited (PIML) as Responsible Entity for:

INTERNAL CODE	ACCOUNT DETAILS	REGISTRATION DETAILS
ALL 'PC' CODES	RBC Global Services Australia Nominees Pty LimitedACF: PIML (Select Investments). C/- RBC GlobabiServices Australia Nominees Pty Limited GPO Box 5424Sydney NSW 2001	RBC Global Services Australia Nominees Pty LimitedACF: PIML (Select Investments). GPO Box 5424 SydneyNSW 2601
GSF	RBC Global Services Australia Nominees Pty Limited.ACF: Perpetual Australia Share Fund. Account Code:PIGSF GPO Box 5424 Sydney NSW 2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
ICAS	RBC Global Services Australia Nominess Pty Limited.ACF: Perpetual Investor Choice Australian Asset Group.Account Code: PHCAS GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
ICIS	RBC Global Australia Nominees Pty LimitedACF: Perpetual Investor Choice Industrial Asset GroupAccount Code: PISIND GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
ICSC	RBC Global Services Australia Nominees Pty Limited.ACF: Perpetual Investor Choice Smaller Asset GroupAccount Code: PISSCF. GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PCEF	RBC Global Services Australia Nominees Pty Limited,Account Code: PICEF, GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PIWGAF	UBS Nominee Pty Ltd ACF: Perpetual WholesaleGeared Australian Share Fund Account code PIWGAS.RBC Global Services Australia Nominees Pty Ltd GPOBox 5424 Sydney NSW 2001	UBS Nominee Pty Ltd Level 25, 1Farrer Place Govenor Phillip Tower Sydney NSW 2000
PIWCPF	RBC Global Services Australia Nominees Pty Ltd ACF:PI Protected Aust Share Fund A. Account codePIWCPF. GPO Box 5424 Sydney NSW 2001	UBS Nominee Pty Ltd Level 25, 1Farrer Place Govenor Phillip Tower Sydney NSW 2000
PIWJPI	RBC Global Services Australia Nominees Pty Limited,ACF: Perpetual JF Wholesale Prop Income Fund.Account Code: PIWJPI GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PIWSPF	UBS Nominee Pty Ltd ACF: Perpetual Wholesale SharePlus Fund Account code PIWSPF. RBC Global ServicesAustralia Nominees Pty Ltd GPO Box 5424 SydneyNSW 2001	UBS Nominee Pty Ltd Level 26, 1Farrer Place Govenor Phillip Tower Sydney NSW 2000
PMISF1	RBC Global Services Australia Nominees Pty LimitedACF: Perpetual's Industrial Share Fund OneAccount Code: PHSF1 GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001

PMSF2	RBC Global Services Australia Nominees Pty LimitedACF: Perpetual's Industrial Share Fund TwoAccount Code: PHSF2 GPO Box 5424 Sydney NSW2000	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PMISFJ	RBC Global Services Australia Nominees Pty LimitedACF: Perpetual's Industrial Share FundAccountCode: PHSFJ GPO Box 5424 Sydney NSW 2000	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PMSCA	RBC Global Services Australia Nominees Pty LimitedATF: Perpetual's Smaller Companies Analyst FundAccount Code: PISCA. GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PMWSCM	RBC Global Australia Nominees Pty LimitedACF: Perpetual Wholesale Smaller Co FundAccount Code: PIWSCM. GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PMWSCS	RBC Global Australia Nominees Pty LimitedACF: Perpetual Wholesale Smaller Co FundAccount Code: PIWSCS. GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PMWSRF	RBC Global Services Australia Nominess Pty Limited.ACF: Perpetual Wholesael Ethical Fund Account Code:PIWSRF GPO Box 5424 Sydney NSW 2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PPSF	RBC Global Services Australia Nominees Pty LimitedATF: Perpetual Property Securities Fund Account Code:PIPSF. GPO Box 5424 Sydney NSW 2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PWSCF	RBC Global Services Australia Nominess Pty Limited.ACF: Perpetual Wholesale Smaller Co Fund AccountCode: PIWSCF GPO Box 5424 Sydney NSW 2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001

Perpetual Investments Management Limited (PIML) as Trustee for:

ALL 'SS' CODES	RBC Global Services Australia Nominees Pty LimitedACF: PIML (Select Super), GPO Box 5424 Sydney NSW LACF: PIML (Select Super), GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited2001
----------------	--------------------------------------------------------------------------------------------------------------------------------------------------------------------	------------------------------------------------------------

Perpetual Investments Management Limited (PIML) under Investment Management Agreements with:

INTERNAL CODE	ACCOUNT DETAILS	REGISTRATION DETAILS
AMCORP	National Nominees Ltd ACF: IOOF Account, AccountCode: PIAMC RBC Global Services Australia NomineesPty Limited GPO Box 5424 Sydney NSW 2001	National Australia Custodian ServicesA/C ATPFAE 6822 - 16, 5th Floor South 271 CollinsStreet Melbourne VIC 3060
ARF	JP Morgan Chase Nominees Ltd ACF: AustralianRetirement Fund, Account Code: PIARF, RBC GlobalServices Australia Nominees Pty Limited GPO Box 5424Sydney NSW 2001	JP Morgan Chase Nominees A/C 13415 LockedBag 7, Royal Exchange Sydney NSW 2000

CBAISF	Citicorp Nominees Pty Ltd. ACF: Commonwealth AustShares Fund 4, Account Code:PICISF, RBC GlobalServices Australia Pty Ltd GPO Box 5424 Sydney NSW2001	Citicorp Nominees Pty Ltd. A/C EASS04 GPO Box 764G,Melbourne VIC 3001
NSWTC	Cogent Nominees Pty Ltd ACF NSW TreasuryCorporation. Account Code: PINSWTRBC Global Services Australia Nominees Pty LimitedGPO Box 5424 Sydney NSW 2001	Cogent Nominees Pty Limited A/C HGFPTE P.O. BoxR209, Royal Exchange, Sydney NSW 1225
PIACT	JP Morgan Chase Nominees Ltd ACF: Australian CapitalTerritory Treasury, Account Code: PIACT RBC GlobalServices Australia Nominees Pty Limited GPO Box 5424Sydney NSW 2001	JP Morgan Chase Nominees A/C 32512 Locked Bag 7.Royal Exchange Sydney NSW 2000
PIEFM6	Cogent Nominees Pty Ltd ACF EFM Australian ShareFund 6 Account Code: PIEFM6, RBC Global ServicesAustralia Nominees Pty Limited GPO Box 5424 SydneyNSW 2001	Cogent Nominees Pty Limited A/C: WTXME6. P.O. BoxR209, Royal Exchange, Sydney NSW 1225
PIFIJI	National Nominees Limited ACF: Fiji National ProvidentFund Account Code: PIFIJI, RBC Global ServicesAustralia Nominees Pty Ltd GPO Box 5424 SydneyNSW 2001	National Australia Custodian Services A/CFNPEAE/9353-16, 5th Floor South 271 Collins StreetMelbourne VIC 3000
PHEST	RBC Global Services Australia Nominees Pty LimitedACF: HEST Australia Limited Account Code: PIHEST.GPO Box 5424 Sydney NSW 2001	JP Morgan Chase Nominees A/C 33112 Locked Bag 7.Royal Exchange Sydney NSW 2000
PIJUTD	BNP Paribas Securities Services ACF: PI United SectorLeaders Property Fund. Account Code: PIJUTD. C/-RBC Global Services Australia Pty Limited GPO Box5424 Sydney NSW 2001	Cogent Nominees Pty Limited A/C: USLJFP, GPO Box4270, Sydney NSW 2000
PIMIT	Guardian TrustAustralia Ltd ACF: Perpetual JamesFielding Meridian Investment Trust Account code PIMIT.RBC Global Services Australia Nominees Pty Ltd GPOBox 5424 Sydney NSW 2001	Guardian Trust Australia Ltd GPO Box469 Sydney NSW 2001
PISTCF	RBC Global Services Australia Nominees Pty LimitedACF: SAS Trustee Corporation. Account Code: PISTCF.GPO Box 5424 Sydney NSW 2001	JP Morgan Chase Nominees A/C 34893 Locked Bag 7.Royal Exchange Sydney NSW 2000
PMCBUS	National Nominees Ltd ACF: Construction & BuildingUnion Superannuation Fund Account Code: PICBUS.RBC Global Services Australia Nominees Pty Limited.GPO Box 5424 Sydney NSW 2001	National Australia Custodian Services A/CCBPFAE/5267-15, 5th Floor South, 271 Collins StreetMelbourne VIC 3000
PMCGSF	Citicorp Nominees Pty Ltd ACF: Commonwealth AustShares Fund 11 Account Code: PICGSF RBC GlobalServices Australia Pty Ltd GPO Box 5424 Sydney NSW2001	Citicorp Nominees Pty Ltd A/C EPSS03 GPO Box 764G.Melbourne VIC 3001
PMCPSF	Citicorp Nominees Pty Ltd ACF:Commonwealth PropertyFund 3 Account Code: PICPSF. RBC Global ServicesAustralia Pty Ltd, GPO Box 5424 Sydney NSW 2001	Citicorp Nominees Pty Ltd A/C EPSS03 GPO Box 764GMelbourne VIC 3001

PMFR	ACF:Westpac Custodian NomineesFrank Russell Investment Management Account Code:PIMFR RBC Global Services Australia Nominees PtyLimited GPO Box 5424 Sydney NSW 2001	Westpac Custodian Nominees State Street Fund BQ8DLevel 9 / 50 Pitt Street Sydney NSW 2000
PMHOST	JP Morgan Chase Nominees LimitedACF: Host - Plus Pty Ltd Account Code: PIHOST, RBCGlobal Services Australia Nominees Pty Limited, GPOBox 5424 Sydney NSW 2001	JP Morgan Chase Nominees A/C 20004 Locked Bag 7.Royal Exchange Sydney NSW 2000
PML	Perpetual Management Limited Account Code: PTPMLRBC Global Services Australia Nominees Pty LimitedGPO Box 5424 Sydney NSW 2001	RBC Giobal Services Australia Nominees Pty Limited GPO Box 5424, Sydney NSW 2001
PMSTA	National Nominees Limited ACF: Super Trust of AustraliaAccount Code: PISTA, RBC Global Services AustraliaNominees Pty Limited GPO Box 5424 Sydney NSW2001	National Australia Custodian Services A/C: 5498-10STPAAE 5th Floor South 271 Collins Street MelbourneVIC 3006
PNOM	Perpetual Nominees Pty LimitedAccount Code: PTPNOM C/- RBC Giobal ServicesAustralia Nominbees Pty LimitedGPO Box 5424 Sydney NSW 2001	RBC Giobal Services Australia Nominees Pty Limited GPO Box 5424, Sydney NSW 2001
PTAL	Perpetual Australia Co Limited Account Code: PTPAL C/-RBC Global Services Australia Nominees Pty LimitedGPO Box 5424, Sydney NSW 2000	RBC Global Services Australia Nominees Pty Limited GPO Box 5430, Sydney NSW 2000
PTAN	Perpetual Nominees Limited Account Code: PTPANRBC Global Services Australia Nominees Pty Limited,GPO Box 5424 Sydney NSW 2001	RBC Giobal Services Australia Nominees Pty Limited GPO Box 5424, Sydney NSW 2001
PTCO	Perpetual Trustee Co. Limited Account Code: PTPCORBC Global Services Australia Nominees Pty LimitedGPO Box 5424 Sydney NSW 2001	RBC Giobal Services Australia Nominees Pty Limited GPO Box 5424, Sydney NSW 2001
PTGEN	Perpetual Trustee Services General A / C Account Code:PTPGEN C/- RBC Global Services Australia NomineesPty Limited GPO Box 5424 Sydney NSW 2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424, Sydney NSW 2001
PTNM	P.T.A. Nominees Limited ATF: Perpetual TrusteesNominees Limited Account Code: PTPNM C/- RBCGlobal Services Australia Nominees Pty LimitedGPO Box 5424 Sydney NSW 2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
PTQLD	Perpetual Trustee Queensland LimitedAccount Code: PTQLD C/-RBC Global ServicesAustralia Nominees Pty Limited GPO Box 5424 SydneyNSW 2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424, Sydney NSW 2001
PTVIC	Perpetual Trustee Victoria LimitedAccount Code: PTNM C/- RBC Global Services AustraliaNominees Pty Limited GPO Box 5424 Sydney NSW2001	RBC Giobal Services Australia Nominees Pty Limited GPO Box 5424, Sydney NSW 2001

PTWA	Perpetual Trustee WA LimitedAccount Code: PTPWA RBC Global Services AustraliaNominees Pty Limited GPO Box 5424 Sydney NSW2001	RBC Global Services Australia Nominees Pty Limited GPO Box 5424, Sydney NSW 2001
QITE2	RBC Global Services Australia Nominees Pty LimitedAFT: Quantitative Investments TE 2 Equity Fund.Account Code: PIQTE2 GPO Box 5424 Sydney NSW2001.	RBC Global Services Australia Nominees Pty Limited GPO Box 5424 Sydney NSW 2001
SMF	BNP Paribas Securities Services ACF: SMF FundsManagement <smf 0013=""> Account Code: PISMF. C/-RBC Global Services Australia Pty Limited GPO Box5424 Sydney NSW 2001	Cogent Nominees Pty Limited A/C USLPEE, GPO BoxR209, Royal Exchange, Sydney NSW 2000
T2	Perpetual Trustee Company Limited(Private)Client Division)	Perpetual Trustee Company Limited39 Hunter Street, Sydney 2000
13	Perpetual Trustees Victoria Limited(Private Client Division)	Perpetual Trustee Company Limited39 Hunter Street, Sydney 2000
14	Perpetual Trustees Queensland Limited(Private Client Division)	Perpetual Trustee Company Limited39 Hunter Street, Sydney 2000
16	Perpetual Trustees WA Limited(Private Client Division)	Perpetual Trustee Company Limited39 Hunter Street, Sydney 2000
Ŧ7	Perpetual Trustee Company Canberra Limited(Private Client Division)	Perpetual Trustee Company Limited39 Hunter Street, Sydney 2000
TEL.	National Nominees Limited ACF: Telstra SuperannuationPty Limited Account Code: PITEL RBC GlobalServices Australia Nominees Pty Limited GPO Box 5424Sydney NSW 2001	National Australia Custodían ServicesA/C 3093-15 TSPPAF 5th Floor South271 Collins Street Melbourne VIC 3000

PRESENT RELEVENT INTERESTS

FI.	Sunnary (Rajostra 111 8333)		$\blacksquare$ $\blacksquare$ $\times$ $\blacksquare$
OKN (OAKTON COMPUTING LTD)		Portfolios
Porfolio	hini	Holdings
v iese	PM	4,012,870
MSCA	РM	100,865
PMWSRF	PM	538,054
PMWSCM	PМ	2,308,668
⊮ PMWSCS	PM	2,066,229

CHANGES IN RELEVANT INTERESTS

Account	Security		Volume		Value	Price	AsAtDate
ICSC	OKN		150,000		243,000	$1.62	04/03/2005
ICSC	OKN		52.788	$\blacksquare$	85,781	$1.63	13/04/2005
ICSC	OKN		92,380	$\overline{a}$	150.312	$1.63	13/04/2005
PMWSCM	OKN		150,000	$\overline{a}$	243,000	$1.62	04/03/2005
PMWSCM	OKN		82,620	$\overline{a}$	134.431	$1.63	13/04/2005
PMWSCM	OKN	m	47,212	$\overline{a}$	76,720	$1.63	13/04/2005
PMSCA	OKN		3,299		4,619	$1.40	16/12/2004
PMSCA	OKN		2,701		3,781	$1.40	17/12/2004
PMSCA	OKN		2,000		2,780	$1.39	20/12/2004
PMSCA	OKN		1,000		1.400	$1.40	21/12/2004
PMSCA	OKN		1,000		1,390	$1.39	23/12/2004
PMSCA	OKN		1,000		1,400	$1.40	04/01/2005
PMSCA	OKN		1,000		1,370	$1.37	05/01/2005
PMSCA	OKN		2,900	$\overline{a}$	4,437	$1.53	19/01/2005
PMSCA	OKN		3,600		5.508	$1.53	21/01/2005
PMSCA	OKN	m	2,000	$\blacksquare$	3,340	$1.67	31/01/2005
PMSCA	OKN	m	1,000	$\overline{a}$	1.630	$1.63	01/02/2005
PMWSCS	OKN	m	70,000	$\overline{a}$	112,000	$1.60	04/02/2005
PMWSCS	OKN		98,561	$\overline{a}$	160,369	$1.63	13/04/2005
PMWSCS	OKN		56,320		91,520	$1.63	13/04/2005
PMWSCS	OKN	-	128,442	$\overline{a}$	209.360	$1.63	15/04/2005
ICSC	OKN		70.000		112,000	$1.60	04/02/2005
ICSC	OKN	m	43,680	$\overline{a}$	70,980	$1.63	13/04/2005
ICSC	OKN		76,439	$\overline{a}$	124.374	$1.63	13/04/2005
ICSC	OKN	m	121,558	÷	198,140	$1.63	15/04/2005