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 the month of March 2007

                               HSBC Holdings plc

                              42nd Floor, 8 Canada
                        Square, London E14 5HQ, England


(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 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- ..............)






     NOTIFICATION OF INTERESTS OF DIRECTORS/PERSONS DISCHARGING MANAGERIAL
                    RESPONSIBILITY AND/OR CONNECTED PERSONS

1. Name of the issuer

HSBC Holdings plc

2. State whether the notification relates to a:

(i) transaction notified in accordance with DTR 3.1.4R(1)(a); or

(ii) DTR 3.1.4(R)(1)(b) a disclosure made in accordance with section 324 (as
extended by section 328)of the Companies Act 1985; or

(iii) Both (i) and (ii).

In respect of (iii)

3. Name of person discharging managerial responsibilities/director

M F Geoghegan

4. State whether notification relates to a person connected with a person
discharging managerial responsibilities/director named in 3 and identify the
connected person

The Michael Geoghegan Transfer Trust

5. Indicate whether the notification is in respect of a holding of the person
referred to in 3 or 4 above or in respect of a non-beneficial interest

In respect of M F Geoghegan, a Director

6. Description of shares (including class), debentures or derivatives or
financial instruments relating to shares

HSBC Holdings plc Ordinary shares of US$0.50 each

7. Name of registered shareholder(s) and, if more than one, the number of shares
held by each of them

Abacus Corporate Trustees Limited 1,184,151

James Capel (Nominees) Limited 158,440

M F Geoghegan 533

HSBC Global Custody Nominees (UK) Limited 222,000

8. State the nature of the transaction

Acquisition / purchase

9. Number of shares, debentures or financial instruments relating to shares
acquired

222,000

10. Percentage of issued class acquired

De minimis

11. Number of shares, debentures or financial instruments relating to shares
disposed

12. Percentage of issued class disposed

13. Price per share or value of transaction

HK$136.50

14. Date and place of transaction

28 March 2007, Hong Kong

15. Total holding of HSBC Holdings plc ordinary shares of US$0.50 each following
notification and total percentage holding following notification

1,565,124 shares (0.01%)

16. Date issuer informed of transaction

29 March 2007

If a person discharging managerial responsibilities has been granted options by
the issuer complete the following boxes

17. Date of grant

18. Period during which or date on which exercise can be exercised

19. Total amount paid (if any) for grant of the option

20. Description of shares or debentures involved (class and number)

21. Exercise price (if fixed at time of grant) or indication that price is to be
fixed at the time of exercise

22. Total number of shares or debentures over which options held following
notification

23. Any additional information

Name of contact and telephone number for queries

Nicola Black, Assistant Secretary, 020 7991 2652

Name of duly authorised officer/official of issuer responsible for making
notification

As above

Date of notification

29 March 2007


                                    SIGNATURE

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.

                               HSBC Holdings plc

                                                By:
                                                Name:  P A Stafford
                                                Title: Assistant Group Secretary
                                                Date:  29 March 2007