| 29 Apr, 05:37 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Format of the Initial Disclosure to be made by an entity identified as a Large Corporate : Annexure A | bse |
| 29 Apr, 11:53 am | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange regarding 'Declaration with regard to SEBI Circular No. SEBI/HO/DDHS/DDHS-RACPOD1/P/CIR/2023/172 dated October 19, 2023 on Large Corporate'. | nse |
| 27 Apr, 08:12 am | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Press Release / Media Release | bse |
| 27 Apr, 08:04 am | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange regarding a press release dated April 27, 2026, titled "Sigma Advanced Systems secures £300 million long-term agreement with Rolls-Royce to manufacture and supply aerospace systems". | nse |
| 21 Apr, 06:10 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange about General Updates-Disclosure Under Regulation 30 of SEBI (LODR) Regulations, 2015- Ref: Our Earlier Disclosure dated Feb 10, 2026 | nse |
| 21 Apr, 06:06 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Updates on Acquisition | bse |
| 10 Apr, 11:18 am | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange regarding 'Action Taken Report under the Special Window for Transfer and Dematerialisation of Physical Securities'. | nse |
| 16 Mar, 01:24 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange regarding a press Note dated March 16, 2026, titled " Sigma Advanced Systems Reconstitutes Board to Support Next Phase of Global Growth- Inducts Lt. Gen. B. S. Raju, Ambassador Nagendra Prasad and Kartheek Raju. ". | nse |
| 16 Mar, 01:21 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Press Release / Media Release | bse |
| 16 Mar, 01:15 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange regarding Appointment of Mr Kartheek Raju Chintalapati as Non- Executive Director of the company w.e.f. March 16, 2026. | nse |
| 16 Mar, 01:15 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange regarding Appointment of Mr Amb. Dr. Venkata Nagendra Prasad Thatipamula as Non- Executive Independent Director of the company w.e.f. March 16, 2026. | nse |
| 16 Mar, 01:10 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Change in Management | bse |
| 16 Mar, 01:07 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange about General Updates- Intimation Relating To Appointment Of Directors Under Regulation 30 Of SEBI (LODR) Regulations, 2015 | nse |
| 12 Mar, 04:31 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange regarding a press release dated March 12, 2026, titled "Press Note-Sigma Advanced Systems completes $15 million Extrovis divestment as it sharpens aerospace and defence focus." | nse |
| 12 Mar, 04:27 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Press Release / Media Release | bse |
| 12 Mar, 04:12 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange about General Updates- Update On Sale of Investment in Extrovis AG, Switzerland | nse |
| 28 Feb, 01:36 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange about Action(s) taken or orders passed- Intimation under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 ("SEBI Listing Regulations") - Intimation in relation to imposition of fine on Sigma Advanced Systems Limited (Formerly Megasoft Limited). | nse |
| 23 Feb, 09:03 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Press Release / Media Release | bse |
| 23 Feb, 08:59 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange regarding a press Note dated February 23, 2026, titled "Sigma Advanced Systems Wins ₹100 Crore Order From Ministry of Defence ". | nse |
| 14 Feb, 08:16 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Outcome Of The Board Meeting Held On February 14, 2026 | bse |
| 14 Feb, 08:11 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has submitted to the Exchange, the financial results for the period ended December 31, 2025.-Outcome of the Board Meeting held on February 14, 2026 | nse |
| 10 Feb, 11:02 pm | — | … | SIGMA ADVANCED SYSTEMS LIMITED has informed the Exchange about Agreements-The Company has signed a Share Purchase Agreement for Acquisition of 51% Stake (Shareholding) in AS Strategic Private Limited- Disclosure under Regulation 30 of SEBI (LODR) Regulations, 2015. | nse |
| 10 Feb, 03:05 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Board Meeting Intimation for Prior Intimation Of Board Meeting Pursuant To Regulation 29 (1) Of The Securities And Exchange Board Of India (Listing Obligations And Disclosure Requirements) Regulations, 2015 | bse |
| 04 Feb, 03:51 pm | — | … | Megasoft Limited has informed the Exchange that Change in Name of the Company- From Megasoft Limited to Sigma Advanced Systems Limited and Approval Letters from the BSE Limited and the National Stock Exchange of India Limited | nse |
| 04 Feb, 03:47 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Change of Company Name | bse |
| 03 Feb, 10:05 pm | — | … | Megasoft Limited has informed the Exchange regarding a Press Note dated February 03, 2026, titled " Sigma Advanced Systems and Indrajaal enter ₹250 crore strategic partnership for counter-drone systems, anchored in indigenous Radar and Electronic Warfare Technology. | nse |
| 03 Feb, 10:02 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Press Release / Media Release | bse |
| 03 Feb, 06:35 pm | — | … | MEGASOFT: Members of the Exchange are hereby informed that the name of Megasoft Limited shall be changed to SIGMA ADVANCED SYSTEMS LIMITED and symbol be changed to SIGMAADV w.e.f. February 09, 2026. | nse |
| 24 Jan, 02:46 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Updates on Disclosures under Reg. 10(6) of SEBI (SAST) Regulations, 2011 | bse |
| 23 Jan, 01:51 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Disclosures under Reg. 10(6) of SEBI (SAST) Regulations, 2011 | bse |
| 23 Jan, 11:15 am | — | … | Yash Dubey has submitted to the Exchange a copy of Disclosures under Regulation 10(6)-Report to stock Exchange in respect of any acquisition made in reliance upon exemption provided for in regulation 10 of SEBI (SAST) Regulations, 2011. | nse |
| 22 Jan, 07:37 pm | — | … | Megasoft Limited has submitted to the Exchange a copy of Disclosures under Regulation 10(6)-Report to stock Exchange in respect of any acquisition made in reliance upon exemption provided for in regulation 10 of SEBI (SAST) Regulations, 2011. | nse |
| 22 Jan, 02:37 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Disclosures under Reg. 29(1) of SEBI (SAST) Regulations, 2011 | bse |
| 16 Jan, 04:24 pm | — | … | Megasoft Limited has informed the Exchange regarding Appointment of Mr. Raju Somashekar Baggavalli as Non- Executive Independent Director of the company w.e.f. January 16, 2026. | nse |
| 16 Jan, 04:20 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Change in Directorate | bse |
| 16 Jan, 04:14 pm | — | … | Megasoft Limited has informed the Exchange regarding Outcome of Board Meeting held on January 16, 2026.-Outcome of the Board Meeting held on January 16, 2026. | nse |
| 13 Jan, 03:22 pm | — | … | Megasoft Limited has informed the Exchange that the name has been changed from Megasoft Limited to Sigma Advanced Systems Limited. | nse |
| 13 Jan, 03:19 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Change of Company Name | bse |
| 09 Jan, 03:09 pm | — | … | Megasoft Limited has informed the Exchange regarding 'Intimation Regarding Special Window for Re-Lodgement of Transfer Requests of Physical Shares and action taken report under the special window'. | nse |
| 02 Jan, 06:58 pm | — | … | Megasoft Limited has informed the Exchange regarding 'Board comments on fine levied by the Exchange . | nse |
| 02 Jan, 05:50 pm | — | … | Megasoft Limited has informed the Exchange that Record date for the purpose of for determining the eligible shareholders of the Transferor Company to whom the shares in Transferee is 14-Jan-2026. | nse |
| 02 Jan, 05:46 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Outcome Of The Board Meeting Held On January 2, 2026. | bse |
| 02 Jan, 05:44 pm | — | … | Sigma Advanced Systems Ltd - 532408 - Outcome Of The Board Meeting Held On January 2, 2026 And Record Date. | bse |
| 02 Jan, 05:37 pm | — | … | Megasoft Limited has informed the Exchange regarding Board meeting held on January 02, 2026.- Outcome of the Board Meeting held on January 2, 2026. | nse |
| 24 Dec, 06:36 pm | — | … | Megasoft Limited has informed the Exchange about General Updates- Certified True Copy ( CTC ) of the Final order dated December 16, 2025, ( Order ) passed by Hon ble National Company Law Tribunal, Chennai Bench for sanctioning the Scheme of Amalgamation amongst Sigma Advanced Systems Private Limited ( Transferor Company ) and Megasoft Limited ( Transferee Company ) and their respective shareholders and creditors under Section 230- 232 and other applicable provisions of the Companies Act, 2013 ( | nse |
| 23 Dec, 10:06 am | — | … | Sigma Advanced Systems Ltd - 532408 - Announcement under Regulation 30 (LODR)-Change in Management | bse |
| 23 Dec, 10:01 am | — | … | Megasoft Limited has informed the Exchange regarding Appointment of Mr Mr. Cheemarla Damodar Reddy as Non- Executive Director of the company w.e.f. December 22, 2025. | nse |
| 23 Dec, 09:56 am | — | … | Sigma Advanced Systems Ltd - 532408 - Intimation For Appointment Of Additional Director (Non-Executive, Non-Independent) Under Regulation 30 Of The Securities And Exchange Board Of India (Listing Obligations And Disclosure Requirements) Regulations, 2015. | bse |
| 19 Dec, 06:15 pm | — | … | Megasoft Limited has informed the Exchange about General Updates.Sub: Intimation under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 ( SEBI Listing Regulations ).Ref: Final order dated December 16, 2025, ( Order ) passed by Hon ble National Company Law Tribunal, Chennai Bench for sanctioning the Scheme of Amalgamation amongst Sigma Advanced Systems Private Limited ( Transferor Company ) and Megasoft Limited ( Transferee Company ) and their respective s | nse |
| 03 Dec, 02:59 pm | — | … | Megasoft Limited has informed the Exchange regarding 'Intimation Regarding Special Window for Re-Lodgement of Transfer Requests of Physical Shares and action taken report under the special window.'. | nse |