SIGMAADVSigma Advanced Systems Ltd.
Sigma Advanced Systems: non-executive director Leona Ambuja resigns from Board
- Management change
- Aerospace and defence
Reviewed byKeshav SehgalBlacklitt Research
Sigma Advanced Systems (NSE: SIGMAADV) said in a filing on 6 Nov 2026 that its Board noted the resignation of Ms Leona Ambuja as Non-Executive Non-Independent Director, effective from the conclusion of the Board meeting held that day. The Board meeting also approved several board appointments and designations.
The resignation and the reason given
Ms Leona Ambuja (DIN: 07138817) resigned as Non-Executive Non-Independent Director with effect from the conclusion of the Board meeting held on 6 Nov 2026. The Board considered and noted the resignation at that meeting.
The disclosure gives the reason as other pre-occupations.
Other changes at the same meeting
The same meeting approved the appointment of Mr Galla Jayadev as Independent Director and of Ms Urkavalan Jeya Santhi as Independent Woman Director, both effective 6 Nov 2026. It designated Lt. Gen. Retd. Raju Somashekar Baggavalli as Chairman of the Board.
The Board also noted the resignations of Mr Suryanarayana Raju Nandyala and Ms Uma Garimella, both as Independent Directors, so Ms Ambuja's departure is one of several board changes disclosed that day.
What the resignation means for Sigma Advanced Systems' shareholders
The filing records one non-executive director leaving the Board and several other board changes on the same day. Ms Ambuja's exit does not, on the filing's account, follow from any disagreement with the Board or management.
The filing does not say whether a replacement for Ms Ambuja will be appointed, or when. It also does not say whether her resignation affects committee seats or any other matter, and gives no further detail on the other pre-occupations she cites.
At a glance
| Item | Detail |
|---|---|
| Director | Ms Leona Ambuja (DIN: 07138817) |
| Position | Non-Executive Non-Independent Director |
| Effective | Conclusion of the Board meeting on 6 Nov 2026 |
| Reason given | Other pre-occupations |
| Filed on | 6 Nov 2026 |
Filed with NSE on . Reference: Original filing (PDF)
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