FORM 6-K

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16 of

the Securities Exchange Act of 1934

For March 23, 2012

Commission File Number: 000-29644

ARM HOLDINGS PLC

(Translation of registrant’s name into English)

110 Fulbourn Road

Cambridge CB1 4NJ

England

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.

Form 20-F X Form 40-F _____

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Indicate by check mark whether the registrant by furnishing the information contained in this Form is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes No X

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b): 82- _____

ARM HOLDINGS PLC

INDEX TO EXHIBITS

Item
1.	Press release dated March 23, 2012 – Holding(s) in Company

Signatures

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: March 23, 2012

	ARM HOLDINGS PLC.


	By:	/s/ Tim Score
		Name: Tim Score
		Title: Chief Financial Officer

Item 1

For filings with the FSA include the annex

For filings with issuer exclude the annex

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:

ARM Holdings plc

2 Reason for the notification (please tick the appropriate box or boxes):
An acquisition or disposal of voting rights		X
An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments
An event changing the breakdown of voting rights
Other (please specify):

3. Full name of person(s) subject to the notification obligation:	FMR LLC
4. Full name of shareholder(s) (if different from 3.):
5. Date of the transaction and date on which the threshold is crossed or reached:	31 December 2011
6. Date on which issuer notified:	14 February 2012
7. Threshold(s) that is/are crossed or reached:	6.140%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares if possible using the ISIN CODE	Situation previous to the triggering transaction		Resulting situation after the triggering transaction
	Number of shares	Number of voting rights	Number of shares	Number of voting rights		% of voting rights
			Direct	Direct	Indirect	Direct	Indirect
Ordinary (GB0000595859)	66,018,481	66,018,481	82,969,153		82,969,153		6.140%

B: Qualifying Financial Instruments
Resulting situation after the triggering transaction
Type of financial instrument	Expiration date	Exercise/ Conversion Period	Number of voting rights that may be acquired if the instrument is exercised/ converted.	% of voting rights
N/A

Total (A+B+C)
Number of voting rights	Percentage of voting rights
82,969,153	6.140%

9. Chain of controlled undertakings through which the voting rights and/or the

financial instruments are effectively held, if applicable:

Proxy Voting:
10. Name of the proxy holder:
11. Number of voting rights proxy holder will cease to hold:
12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:
14. Contact name:	Elizabeth Crutchley
15. Contact telephone number:	+44 1223 400573

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial

instrument

Exercise

price

Expiration

date

Exercise/

Conversion

period

Number of voting

rights instrument

refers to

% of voting rights