Indian billionaire Gautam Adani’s $2.5 billion share sale inched closer to full subscription on Tuesday as investors pumped in funds after a tumultuous week for his group in which its stocks were pummeled by a scathing short-seller report.

The secondary share sale of flagship Adani Enterprises (ADEL.NS) was subscribed 93% on Tuesday, including the anchor investor portion, Indian stock exchange data showed. The share sale needed at least 90% subscription to go through.

By Monday, the book building process of the country’s largest share sale had received only 3% in bids, amid swirling concerns that the share sale could struggle due to a market rout in Adani’s stocks in recent days.

The share sale is critical for Adani, not just because it is India’s largest follow-on offering and will help cut debt, but also because its success will be seen as a stamp of confidence by investors at a time the tycoon faces one of his biggest business and reputational challenges of recent times.

The offer closes days after Adani’s public faceoff with Hindenburg Research, which on Jan. 24 flagged concerns about the use of tax havens and “substantial debt” at the group. It added that shares in seven Adani listed companies have an 85% downside due to what it called “sky-high valuations”.

That has since sparked $65 billion in cumulative losses for stocks of the Adani group, which called the report baseless.

The support for Adani’s share sale came even as the flagship’s shares were trading at 2,967 rupees, up nearly 2.5% but below the lower end of the share sale price band of 3,112 rupees.

“It looks down to the wire with just a few hours remaining on the last day, but the offering should go through. Institutions seem to be subscribing to capitalise on opportunity to buy in bulk quantities outside the open market,” said Dipan Mehta, founder director of Elixir Equities.

Adani Group’s total gross debt in the financial year ended March 31, 2022, rose 40% to 2.2 trillion rupees ($26.83 billion). Adani said on Sunday – while responding to Hindenburg’s allegations – that over the past decade the group has “consistently de-levered”. Hindenburg later said Adani’s “response largely confirmed our findings and ignored our key questions.”

The group had in recent days repeatedly said investors were standing by its side and the share offering would go through, amid rising concerns that may not happen. Bankers at one point had considered tweaking the pricing of the issue, or extending the sale, Reuters had reported.

Adani even said the Hindenburg report was a “calculated attack” on the country and its institutions while its CFO compared the market rout of its stocks to a colonial-era massacre.

Demand from retail investors remained muted, garnering bids only worth around 10% of the shares on offer for that segment. On Tuesday, demand mostly came from foreign institutional investors, as well as corporates who bid in excess of 1 million rupees each, data showed.

Over the weekend and through Monday, Adani’s firm held extensive discussions with investment bankers and institutional investors to attract subscriptions, according to two sources with direct knowledge of the talks.

Abu Dhabi conglomerate International Holding Company (IHC.AD) said it will invest $400 million in the issue.

“The follow-on public offering has to go through to restore investor confidence,” said V. K. Vijayakumar, Chief Investment Strategist at Geojit Financial Services.

The Hindenburg report and its fallout have drawn global attention. Adani is now the world’s eighth richest person, down from third ranking on Forbes’ rich list last week.

Adani Transmission (ADAI.NS) rose 1.6% on Tuesday, after losing 38% since the Hindenburg report, while Adani Ports and Special Economic Zone (APSE.NS) climbed 3.2%.

Adani Total Gas (ADAG.NS) languished at its 10% lower price limit, while Adani Power (ADAN.NS) and Adani Wilmar (ADAW.NS) were down 5% each.

Global index publisher FTSE Russell said on Tuesday it continues to monitor publicly available information on the group, in particular from the Indian regulatory authorities.

Hindenburg said in its report it had shorted U.S.-bonds and non-India traded derivatives of the Adani Group. On Tuesday, U.S. dollar-denominated bonds issued by Adani Ports and Special Economic Zone continued their fall into a second week.

($1 = 82.0025 Indian rupees)