Weighted Average Cost of Acquisition in an IPO: What Insiders Paid Before You

Every IPO price band comes with a quiet comparison buried inside it: what did the insiders pay? The weighted average cost of acquisition in an IPO, usually shortened to WACA, answers exactly that. It tells you the average price at which the company issued fresh shares, and at which promoters, big shareholders and selling shareholders bought or sold, in the months before the offer. Put that number next to the price band and you can see, in one glance, how much richer the company has become on paper by the time it reaches you.

We think it is one of the most useful numbers in an offer document, and one of the least read. This guide covers what SEBI requires, how the calculation works, a full worked example in rupees, and how to read the multiple without jumping to the wrong conclusion.

Where the WACA disclosure came from

Before late 2022, the “Basis for Issue Price” section of most offer documents leaned mostly on familiar ratios such as EPS, P/E, return on net worth and net asset value, plus a peer table. Retail investors had no easy way to know that a private equity fund had bought in eighteen months earlier at a fraction of the IPO price.

SEBI changed that through the SEBI (Issue of Capital and Disclosure Requirements) (Fourth Amendment) Regulations, 2022, dated November 21, 2022. The amendment added new paragraphs to Part A of Schedule VI of the ICDR Regulations, under the heading “Basis for Issue Price”. The full amended text is reproduced on TaxGuru.

The same amendment also tightened rules on key performance indicators (KPIs). That matters here, because SEBI wants the company to justify the gap between the WACA and the IPO price using those KPIs.

What exactly has to be disclosed

The amended Schedule VI asks the company and its lead managers to disclose the price per share for two kinds of deals done in the 18 months before the draft red herring prospectus (DRHP) or red herring prospectus (RHP) is filed.

1. Primary issuances

These are fresh shares, or convertible securities, issued by the company itself. Shares issued under ESOP or ESOS schemes and bonus shares are left out. A deal counts only if it is equal to or more than 5 per cent of the fully diluted paid-up share capital, calculated on the pre-issue capital before the transaction and excluding employee stock options granted but not vested.

2. Secondary transactions

These are sales or purchases of existing shares where at least one party is a promoter or promoter group entity, a shareholder selling through the IPO’s offer for sale, or a shareholder with the right to nominate a director to the board. Gifts are excluded. The same 5 per cent test applies.

Two details stop companies from slicing deals to slip under the bar. First, the 5 per cent threshold can be met by a single transaction or by multiple transactions combined over a rolling 30-day window. Second, if there are no qualifying deals at all, the company must instead disclose the price per share of its last five primary or secondary transactions, as long as they are not older than three years before filing, whatever their size. And every price has to be adjusted for corporate actions such as splits and bonus issues, so you are comparing like with like.

The IPO price band is the company’s opinion of its worth. The WACA is what people with far better information actually paid. The distance between the two is where the questions start.

The table you will find in the price band ad

Once the qualifying deals are identified, the company works out a weighted average cost for each bucket and expresses the floor price and cap price as multiples of it. The rule prescribes the layout, which looks like this:

Three more requirements sit around it. The company must give a detailed explanation of why the offer or cap price is that many times the WACA, comparing its KPIs and financial ratios for the last three full financial years and any stub period. It must explain any external factors that may have influenced pricing. And the same table must be printed in the price band advertisement under the “Risks to Investors” section, along with a recommendation from a committee of independent directors stating that the price band is justified on the basis of quantitative factors or KPIs, compared with the WACA.

So you don’t need to wade through a long RHP to find it. It is in the newspaper ad.

How the weighted average cost of acquisition in an IPO is calculated

“Weighted” simply means each deal counts in proportion to the number of shares in it. A big round at a low price pulls the average down more than a small round at a high price pulls it up. The formula is the one you used for averaging a stock purchase in school:

WACA = (Shares in deal 1 × Price 1 + Shares in deal 2 × Price 2 + …) ÷ Total shares across the qualifying deals

Primary and secondary deals are averaged separately. That is deliberate. A primary round tells you what investors paid the company for new shares. A secondary deal tells you what existing holders, often the very people now selling in the OFS, paid or accepted among themselves.

A worked example: the WACA of a hypothetical IPO

Let’s build one from scratch. Company Y is a made-up consumer brand preparing to file its RHP. Every number below is invented for illustration.

Step 1: Find the qualifying primary deals

Fifteen months before filing, Company Y had 5 crore fully diluted shares. It raised a growth round by issuing 40 lakh shares at ₹250. That is 40 lakh ÷ 5 crore = 8 per cent of pre-issue capital, comfortably above 5 per cent. It qualifies.

Capital is now 5.4 crore shares. Seven months before filing, the company issued 20 lakh shares at ₹300 to one investor and, 25 days later, 10 lakh shares at ₹310 to another. Separately, each is below 5 per cent of 5.4 crore. But they fall within a rolling 30-day window, so they are combined: 30 lakh ÷ 5.4 crore = about 5.56 per cent. Both deals qualify.

Primary WACA = (40 lakh × ₹250 + 20 lakh × ₹300 + 10 lakh × ₹310) ÷ 70 lakh

= (₹100 crore + ₹60 crore + ₹31 crore) ÷ 70 lakh = ₹191 crore ÷ 70 lakh = about ₹272.86 per share

Step 2: Find the qualifying secondary deals

Capital is now 5.7 crore shares, so the 5 per cent bar is 28.5 lakh shares. Two secondary deals happened in the window:

• The promoter sold 30 lakh shares at ₹280 to a private equity fund. That is about 5.26 per cent. Qualifies, because a promoter is a party.
• The same PE fund later bought another 35 lakh shares at ₹350 from an early angel investor. That is about 6.14 per cent. The fund is now selling some shares in the OFS, so it counts as a selling shareholder. Qualifies.

Secondary WACA = (30 lakh × ₹280 + 35 lakh × ₹350) ÷ 65 lakh = (₹84 crore + ₹122.5 crore) ÷ 65 lakh = ₹206.5 crore ÷ 65 lakh = about ₹317.69 per share

Step 3: Compare with the price band

Company Y sets its price band at ₹540–570. Divide each end by each WACA:

Read that plainly. At the top of the band, you would pay a bit more than double what investors paid the company for new shares over the last 15 months, and about 1.8 times what insiders paid each other. The PE fund that bought its first block at ₹280 would be selling at about 2.04 times its entry price if the issue is priced at ₹570.

Step 4: Adjust for corporate actions

Suppose the ₹250 round had actually been done at ₹500 per share before a 1:1 bonus issue. The rule requires the price to be adjusted, so ₹500 on one share becomes ₹250 on two. If you ever see a WACA that looks oddly high against the band, check the notes to see whether a split or bonus has been accounted for.

A 2x multiple over 15 months is not automatically a red flag. A 2x multiple with flat revenue and thinner margins is a very different story.

How to read the multiple without overreacting

The temptation is to see “2.09 times” and conclude the IPO is a rip-off. That is too quick. Here is how we look at it.

Ask what changed in between. If Company Y’s revenue, profit and margins grew sharply between the funding round and the IPO, a higher price can be justified. This is why SEBI wants the KPI comparison alongside the table. Go to the “Basis for Issue Price” section and check whether the numbers actually moved.

Mind the time gap. A 2x jump over three years is a very different thing from a 2x jump over five months. The table won’t tell you this on its own. The detailed list of transactions, with dates, sits in the RHP.

Compare with listed peers, not just with the past. The WACA tells you how the price moved. The peer comparison in the Basis for Issue Price section tells you whether the destination makes sense. A company can be priced at 1.2 times its WACA and still be expensive if the last round itself was frothy.

Notice who is selling. If the secondary deals were done by investors who are now cashing out in the OFS at a big premium, the IPO is partly an exit. That isn’t wrong, but you should know that a chunk of the money goes to them, not into the business. The RHP spells out how much of the issue is fresh shares and how much is OFS.

Watch for a pre-IPO round close to filing. Sometimes a pre-IPO placement is done at or near the IPO band. That can pull the primary WACA up and make the multiple look modest. It is worth checking the dates and size of the latest round before taking comfort from a low multiple.

Read the independent directors’ recommendation critically. It is a required statement, so every issue will have one. What matters is whether the KPIs it points to actually support the gap.

What WACA does not tell you

It is a backward-looking number. It says nothing about the business’s prospects, the quality of earnings or how the stock will trade after listing. Private rounds also carry terms that public investors don’t get, such as liquidation preferences or anti-dilution protection, so a private price is not perfectly comparable with an IPO price. And because only deals at or above 5 per cent count (unless there were none), smaller transactions at very different prices can sit outside the calculation.

Treat it as one input. A useful one, because it puts the insiders’ price on the same page as yours.

A quick checklist before you apply

1. Find the WACA table in the price band ad, under “Risks to Investors”.
2. Note both multiples: primary and secondary, at the floor and the cap.
3. Open the RHP’s “Basis for Issue Price” section and check the dates of the underlying deals.
4. See whether KPIs and financial ratios improved enough over that period to explain the gap.
5. Check how much of the issue is OFS and who the sellers are.
6. Compare valuation with listed peers before deciding.

For the bigger picture on reading an offer from start to finish, see our pillar guide on IPO investing in India.

The short version

Since SEBI’s November 2022 amendment, an IPO filed under the amended ICDR rules has to show the weighted average price paid in qualifying primary and secondary deals over the 18 months before filing, and express the price band as a multiple of it. The table appears in the price band ad. A high multiple is a prompt to dig, not a verdict. Check what changed in the business, how long the gap was, and who is selling. If the KPIs back the jump, fine. If they don’t, the WACA has done its job by making you ask.

Disclaimer: This article is for educational purposes only and is not investment advice. Company Y and all figures in the worked example are hypothetical. Investing involves risk of loss; consult a SEBI-registered investment adviser before making investment decisions.