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 September, 2006 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 DR 3.1.4R(1)(a); or ii. DR 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) (iii) 3. Name of person discharging managerial responsibilities/director S K Green 4. State whether notification relates to a person connected with a person discharging managerial responsibilities/director named in 3 and identify the connected person In respect of Director 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 the person named in (3) above, S K Green 6. Description of shares (including class), debentures or derivatives or financial instruments relating to shares US$0.50 ordinary shares 7. Name of registered shareholder(s) and, if more than one, the number of shares held by each of them HSBC Trinkaus & Burkhardt (International) SA 16,947 Abacus Corporate Trustee Limited 992,830 Computershare Trustees Limited Account SIP 970 James Capel (Nominees) Limited 335,538 Stephen Keith Green & Janian Green (SGS) 45,355 8. State the nature of the transaction Acquisition / monthly contribution to HSBC Holdings UK Share Ownership Plan holdings 9. Number of shares, debentures or financial instruments relating to shares acquired 13 shares 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 GBP9.67 14. Date and place of transaction 27 September 2006, London 15. Total holding following notification and total percentage holding following notification 1,391,640 (0.01 per cent) 16. Date issuer informed of transaction 27 September 2006 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 Date of notification 28 September 2006 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: 28 September 2006