Sachin Ahir formally resigned from the Shiv Sena (Uddhav Balasaheb Thackeray) on 30 June, sending his official resignation letter to Uddhav Thackeray immediately after filing his nomination papers for the post of Maharashtra Legislative Council Deputy Chairperson. Ahir stepped down from all key responsibilities within the party, including his roles as General Secretary of the Bharatiya Kamgar Sena and President of the Brihanmumbai BEST Kamgar Sena, citing 'unavoidable circumstances' for his departure.

What Ahir Said in His Resignation

In his letter addressed to Thackeray, Ahir acknowledged the trust placed in him by the party while offering no further elaboration on the circumstances behind his exit. 'I am deeply grateful to you and the party for the trust you reposed in me and for providing me the opportunity to work in these capacities. However, due to certain unavoidable circumstances, I am resigning from my posts in the Bharatiya Kamgar Sena and the Shiv Sena (Uddhav Balasaheb Thackeray) party,' he wrote.

He also requested that Thackeray's 'trust and affection' toward him remain unchanged, adding that his 'best wishes will always be there for the bright future of the party.'

High-Profile Nomination Filing

The political shift became public when visuals emerged of Ahir filing his nomination form for the Deputy Chairperson post. The filing took place in the presence of Chief Minister Devendra Fadnavis, Deputy Chief Minister Eknath Shinde, former Deputy Chairperson Neelam Gorhe, and State Minister Chandrakant Patil. Shiv Sena minister and spokesperson Sanjay Shirsat confirmed this was a formal induction, not merely a tactical realignment for an election. 'Sachin Ahir has not just changed sides; he has officially entered the Shiv Sena,' Shirsat announced.

What the UBT Camp Said

Shiv Sena (UBT) MLC Ambadas Danve told reporters that Ahir had messaged him in English at 11:30 am on the same day, stating he was 'making some decisions to protect his political existence.' Danve sought to minimise the impact, noting that Worli — Ahir's political base — had already seen a Shiv Sena (UBT) setback when Sunil Shinde defeated Ahir there. 'Under such circumstances, his departure won't make any difference. UBT has filed the nomination of J.M. Abhyankar for the post of Deputy Chairperson,' Danve stated. Ahir had also contacted Aaditya Thackeray early that morning to explain his decision.

BJP Weighs In, Distances Itself from 'Operation'

Senior Bharatiya Janata Party (BJP) leader and State Revenue Minister Chandrashekhar Bawankule attributed the Thackeray faction's erosion to what he described as internal arrogance. 'Uddhav Thackeray's party has decayed solely because of his arrogant language. He and his people need to shed this ego,' Bawankule told reporters. He also explicitly distanced the BJP from any coordinated poaching strategy. 'The Bharatiya Janata Party has absolutely nothing to do with this operation. Eknath Shinde is expanding his own party,' he said, while also targeting Thackeray's spokesperson Sanjay Raut, accusing the camp of prioritising media appearances over party management.

Blow to UBT's Mumbai Base

Political analysts view Ahir's exit as the second phase of Deputy Chief Minister Shinde's broader strategy to dismantle the Thackeray faction's organisational base. This follows Shinde's earlier success in drawing six Lok Sabha MPs from the UBT camp — an offensive that insiders dubbed 'Operation Tiger.' Notably, Ahir was regarded as a close confidant of Aaditya Thackeray, making the defection particularly damaging to the Thackeray family's political standing in Mumbai. Insiders suggest that shifting ground realities within the Maha Vikas Aghadi (MVA) coalition made Ahir's prospects under the UBT banner look uncertain, reportedly prompting his switch to the ruling Mahayuti alliance. As Uddhav Thackeray continues his statewide tour to consolidate support, Shinde's counter-move inside the Thackeray stronghold of Worli has significantly altered the political equation ahead of the upcoming assembly elections.