Company X has EBITDA of $500mm and was acquired 6/30/15 by Toshiba. How would you adjust EV/EBITDA given that EV is a full year value? What other adjustments would you consider?

First, clarify what period the $500mm EBITDA covers. If it is only the 1/1/15–6/30/15 stub period, you should not pair that directly with EV at 6/30/15 because the denominator is only six months of earnings. The best adjustment is to use LTM EBITDA as of the close date (i.e., EBITDA for the 12 months ended 6/30/15). If only the six-month stub is available and the business is not seasonal, a shortcut is to annualize it: $500 \times \frac{12}{6} = 1{,}000$ mm. Other adjustments to consider include calendarization, seasonality, non-recurring item normalization, pro forma/run-rate adjustments, synergy treatment, and making sure net debt and other EV bridge items are measured as of the close date.

A company has $1bn revenue in YR0 and 10% CAGR with a 10% constant EBITDA margin. It was purchased at 10x EV/EBITDA, with 4x EBITDA of debt and no interest. Assume that the company was sold at $1.3bn at year 3 and that it pays back $100mm of the debt after each year. How much equity does the financial sponsor have at the end of year 3?

The sponsor's equity at exit is $1,200mm, calculated as the $1,300mm exit enterprise value minus the $100mm remaining debt ($400mm initial debt less $300mm cumulative repayment), representing a 2.0x MoM return.

How does debt affect equity in an LBO?

Debt reduces the initial equity investment and is paid down over time, so any enterprise value growth is magnified into a much larger percentage return on equity—though losses are equally amplified on the downside.

A company has $1bn revenue in YR0 and 10% CAGR. Assume the company has a 10% EBITDA margin (constant), it's trading at 10x EV/EBITDA, is able to borrow at 4x EBITDA and has no interest. How much equity must a financial sponsor pay upfront?

The sponsor must pay $600m in equity upfront: $1bn revenue × 10% margin = $100m EBITDA, valued at 10x ($1,000m EV), less 4x leverage ($400m debt), leaving $600m equity (60% of EV).

A company has $1bn revenue in Year 0 and 10% CAGR. Calculate the revenues for years 1, 2, and 3.

Applying a 10% CAGR to $1B in Year 0: Year 1 revenue is $1,100M, Year 2 is $1,210M, and Year 3 is $1,331M, with each year compounding on the prior year's grown base.

LBO multi-step problem: Step 1: A company has $1bn revenue in yr0 and 10% CAGR, calculate its revenue of yr1, yr2 and yr3. Step 2: Assume the company has 10% EBITDA margin, is the target of an LBO transaction at 10x EBITDA, is able to borrow at 4x EBITDA with no interest, cash flow is used to amortize the debt, how much equity investment does a financial sponsor have to pay upfront? How much equity does the financial sponsor have at the end of yr3? Step 3: Assume the company was sold at $1.3bn at yr3, what's the equity value? What's the IRR? What's expected IRR usually? Step 4: If we were to leverage at 7x EBITDA, what would you require of the target company?

Revenue grows from $1bn to $1.1bn, $1.21bn, $1.331bn; the sponsor invests $600m equity upfront, holds ~$1,264m equity at exit ($1.3bn EV less ~$35.9m remaining debt), achieving ~28% IRR; at 7x leverage, the target must have highly predictable, stable cash flows.

If you buy a company and bring in $500mm after the acquisition, how does that affect EV/EBITDA? Assume you add $500mm to EBITDA.

It depends on the purchase price: if you pay a higher multiple than your current EV/EBITDA, the multiple increases; if you pay a lower multiple, it decreases; if the same, it stays unchanged.

Given a DCF analysis, how would you identify and correct common errors?

Systematically audit the WACC inputs, verify FCF excludes interest and has correct NWC signs, ensure the terminal growth rate stays below nominal GDP with a normalized FCF, check the EV-to-equity bridge, and sanity-check implied multiples.

LBO case: $1bn EV, $1bn sales, 10% EBITDA margin (so $100mm EBITDA), debt is 4x EBITDA, 10% growth annually.

This LBO yields approximately 2.0x MOIC and approximately 15% IRR in a standard simplified case assuming a 5-year hold, no multiple expansion, and no debt paydown. Specifically: entry EV is $1,000mm, debt is 4.0x EBITDA = $400mm, so sponsor equity is $600mm; EBITDA grows from $100mm to about $161mm by Year 5; exiting at the same 10.0x multiple gives exit EV of about $1,611mm; subtracting the original $400mm of debt gives exit equity of about $1,211mm; and $1,211mm / $600mm = about 2.0x MOIC, which implies about a 15% IRR. If you want to discuss debt paydown, you need additional assumptions on interest, taxes, capex, and working capital.

What makes a good LBO candidate?

A good LBO candidate has strong, predictable free cash flow, low capex needs, a defensible market position, clear margin improvement opportunities, and growth avenues—traits that maximize returns through debt paydown, EBITDA growth, and multiple expansion.

Given the LBO case with $1bn EV, $1bn sales, 10% EBITDA margin ($100mm EBITDA), debt at 4x EBITDA, and 10% annual growth, what is the IRR?

The IRR is approximately 15%, driven by 10% annual EBITDA growth amplified through leverage (40% debt, 60% equity), with no multiple expansion or debt paydown, yielding a ~2.0x MOIC over five years.

Walk me through the M&A sell-side process.

The sell-side M&A process follows five phases: Preparation (model, CIM, buyer list), Round 1 (teasers, NDAs, IOIs), Round 2 (data room, management presentations, final bids), Negotiation & Signing (definitive agreement), and Closing (regulatory approvals, funds transfer).

Company X has EBITDA of $500mm and was acquired 6/30/15 by Toshiba. How would you adjust EV/EBITDA given that EV is a full year value? What other adjustments would you consider?

First, clarify what period the $500mm EBITDA covers. If it is only the 1/1/15–6/30/15 stub period, you should not pair that directly with EV at 6/30/15 because the denominator is only six months of earnings. The best adjustment is to use LTM EBITDA as of the close date (i.e., EBITDA for the 12 months ended 6/30/15). If only the six-month stub is available and the business is not seasonal, a shortcut is to annualize it: $500 \times \frac{12}{6} = 1{,}000$ mm. Other adjustments to consider include calendarization, seasonality, non-recurring item normalization, pro forma/run-rate adjustments, synergy treatment, and making sure net debt and other EV bridge items are measured as of the close date.

A company has $1bn revenue in YR0 and 10% CAGR with a 10% constant EBITDA margin. It was purchased at 10x EV/EBITDA, with 4x EBITDA of debt and no interest. Assume that the company was sold at $1.3bn at year 3 and that it pays back $100mm of the debt after each year. How much equity does the financial sponsor have at the end of year 3?

The sponsor's equity at exit is $1,200mm, calculated as the $1,300mm exit enterprise value minus the $100mm remaining debt ($400mm initial debt less $300mm cumulative repayment), representing a 2.0x MoM return.

How does debt affect equity in an LBO?

Debt reduces the initial equity investment and is paid down over time, so any enterprise value growth is magnified into a much larger percentage return on equity—though losses are equally amplified on the downside.

A company has $1bn revenue in YR0 and 10% CAGR. Assume the company has a 10% EBITDA margin (constant), it's trading at 10x EV/EBITDA, is able to borrow at 4x EBITDA and has no interest. How much equity must a financial sponsor pay upfront?

The sponsor must pay $600m in equity upfront: $1bn revenue × 10% margin = $100m EBITDA, valued at 10x ($1,000m EV), less 4x leverage ($400m debt), leaving $600m equity (60% of EV).

A company has $1bn revenue in Year 0 and 10% CAGR. Calculate the revenues for years 1, 2, and 3.

Applying a 10% CAGR to $1B in Year 0: Year 1 revenue is $1,100M, Year 2 is $1,210M, and Year 3 is $1,331M, with each year compounding on the prior year's grown base.

LBO multi-step problem: Step 1: A company has $1bn revenue in yr0 and 10% CAGR, calculate its revenue of yr1, yr2 and yr3. Step 2: Assume the company has 10% EBITDA margin, is the target of an LBO transaction at 10x EBITDA, is able to borrow at 4x EBITDA with no interest, cash flow is used to amortize the debt, how much equity investment does a financial sponsor have to pay upfront? How much equity does the financial sponsor have at the end of yr3? Step 3: Assume the company was sold at $1.3bn at yr3, what's the equity value? What's the IRR? What's expected IRR usually? Step 4: If we were to leverage at 7x EBITDA, what would you require of the target company?

Revenue grows from $1bn to $1.1bn, $1.21bn, $1.331bn; the sponsor invests $600m equity upfront, holds ~$1,264m equity at exit ($1.3bn EV less ~$35.9m remaining debt), achieving ~28% IRR; at 7x leverage, the target must have highly predictable, stable cash flows.

If you buy a company and bring in $500mm after the acquisition, how does that affect EV/EBITDA? Assume you add $500mm to EBITDA.

It depends on the purchase price: if you pay a higher multiple than your current EV/EBITDA, the multiple increases; if you pay a lower multiple, it decreases; if the same, it stays unchanged.

Given a DCF analysis, how would you identify and correct common errors?

Systematically audit the WACC inputs, verify FCF excludes interest and has correct NWC signs, ensure the terminal growth rate stays below nominal GDP with a normalized FCF, check the EV-to-equity bridge, and sanity-check implied multiples.

LBO case: $1bn EV, $1bn sales, 10% EBITDA margin (so $100mm EBITDA), debt is 4x EBITDA, 10% growth annually.

This LBO yields approximately 2.0x MOIC and approximately 15% IRR in a standard simplified case assuming a 5-year hold, no multiple expansion, and no debt paydown. Specifically: entry EV is $1,000mm, debt is 4.0x EBITDA = $400mm, so sponsor equity is $600mm; EBITDA grows from $100mm to about $161mm by Year 5; exiting at the same 10.0x multiple gives exit EV of about $1,611mm; subtracting the original $400mm of debt gives exit equity of about $1,211mm; and $1,211mm / $600mm = about 2.0x MOIC, which implies about a 15% IRR. If you want to discuss debt paydown, you need additional assumptions on interest, taxes, capex, and working capital.

What makes a good LBO candidate?

A good LBO candidate has strong, predictable free cash flow, low capex needs, a defensible market position, clear margin improvement opportunities, and growth avenues—traits that maximize returns through debt paydown, EBITDA growth, and multiple expansion.

Given the LBO case with $1bn EV, $1bn sales, 10% EBITDA margin ($100mm EBITDA), debt at 4x EBITDA, and 10% annual growth, what is the IRR?

The IRR is approximately 15%, driven by 10% annual EBITDA growth amplified through leverage (40% debt, 60% equity), with no multiple expansion or debt paydown, yielding a ~2.0x MOIC over five years.

Walk me through the M&A sell-side process.

The sell-side M&A process follows five phases: Preparation (model, CIM, buyer list), Round 1 (teasers, NDAs, IOIs), Round 2 (data room, management presentations, final bids), Negotiation & Signing (definitive agreement), and Closing (regulatory approvals, funds transfer).

Question Bank

William Blair IB Interview Questions

Q: What does the William Blair interview process look like?

Usually a first round of one or two interviews blending technical and behavioral, then a superday with the target group. William Blair places real weight on genuine interest in its sectors alongside technical accuracy. OFFERGOBLIN's Bank & Round mode mirrors the format.

Q: What should I focus on for a William Blair interview?

Get the core technicals down cold — the three statements, valuation, a DCF, and a basic LBO — and be ready to explain why you want William Blair and its groups specifically. OFFERGOBLIN lets you drill the William Blair-tagged subset by round.

William Blair investment banking interview questions from candidate reports. Format, core technicals, and the sector-focused questions William Blair tends to ask.

William Blair rewards candidates who are solid on the fundamentals and show genuine interest in the group and its sectors. William Blair is a middle-market investment bank with a strong growth-company M&A and equity practice. First rounds stay close to the core technicals; later rounds get more sector-specific.

OFFERGOBLIN tags every William Blair-specific question candidates have reported. Use Bank & Round mode in the Accelerated tier to drill the core technicals plus the sector-flavored follow-ups William Blair tends to ask.

Sample William Blair IB Interview Questions

A short sample from the full bank. Tap an answer to reveal it.

William Blair
Company X has EBITDA of $500mm and was acquired 6/30/15 by Toshiba. How would you adjust EV/EBITDA given that EV is a full year value? What other adjustments would you consider?
First, clarify what period the $500mm EBITDA covers. If it is only the 1/1/15–6/30/15 stub period, you should not pair that directly with EV at 6/30/15 because the denominator is only six months of earnings. The best adjustment is to use LTM EBITDA as of the close date (i.e., EBITDA for the 12 months ended 6/30/15). If only the six-month stub is available and the business is not seasonal, a shortcut is to annualize it: $500 \times \frac{12}{6} = 1{,}000$ mm. Other adjustments to consider include calendarization, seasonality, non-recurring item normalization, pro forma/run-rate adjustments, synergy treatment, and making sure net debt and other EV bridge items are measured as of the close date.
Work full answer in app
William Blair
A company has $1bn revenue in YR0 and 10% CAGR with a 10% constant EBITDA margin. It was purchased at 10x EV/EBITDA, with 4x EBITDA of debt and no interest. Assume that the company was sold at $1.3bn at year 3 and that it pays back $100mm of the debt after each year. How much equity does the financial sponsor have at the end of year 3?
The sponsor's equity at exit is $1,200mm, calculated as the $1,300mm exit enterprise value minus the $100mm remaining debt ($400mm initial debt less $300mm cumulative repayment), representing a 2.0x MoM return.
Work full answer in app
William Blair
How does debt affect equity in an LBO?
Debt reduces the initial equity investment and is paid down over time, so any enterprise value growth is magnified into a much larger percentage return on equity—though losses are equally amplified on the downside.
Work full answer in app
William Blair
A company has $1bn revenue in YR0 and 10% CAGR. Assume the company has a 10% EBITDA margin (constant), it's trading at 10x EV/EBITDA, is able to borrow at 4x EBITDA and has no interest. How much equity must a financial sponsor pay upfront?
The sponsor must pay $600m in equity upfront: $1bn revenue × 10% margin = $100m EBITDA, valued at 10x ($1,000m EV), less 4x leverage ($400m debt), leaving $600m equity (60% of EV).
Work full answer in app
William Blair
A company has $1bn revenue in Year 0 and 10% CAGR. Calculate the revenues for years 1, 2, and 3.
Applying a 10% CAGR to $1B in Year 0: Year 1 revenue is $1,100M, Year 2 is $1,210M, and Year 3 is $1,331M, with each year compounding on the prior year's grown base.
Work full answer in app
William Blair
LBO multi-step problem: Step 1: A company has $1bn revenue in yr0 and 10% CAGR, calculate its revenue of yr1, yr2 and yr3. Step 2: Assume the company has 10% EBITDA margin, is the target of an LBO transaction at 10x EBITDA, is able to borrow at 4x EBITDA with no interest, cash flow is used to amortize the debt, how much equity investment does a financial sponsor have to pay upfront? How much equity does the financial sponsor have at the end of yr3? Step 3: Assume the company was sold at $1.3bn at yr3, what's the equity value? What's the IRR? What's expected IRR usually? Step 4: If we were to leverage at 7x EBITDA, what would you require of the target company?
Revenue grows from $1bn to $1.1bn, $1.21bn, $1.331bn; the sponsor invests $600m equity upfront, holds ~$1,264m equity at exit ($1.3bn EV less ~$35.9m remaining debt), achieving ~28% IRR; at 7x leverage, the target must have highly predictable, stable cash flows.
Work full answer in app
William Blair
If you buy a company and bring in $500mm after the acquisition, how does that affect EV/EBITDA? Assume you add $500mm to EBITDA.
It depends on the purchase price: if you pay a higher multiple than your current EV/EBITDA, the multiple increases; if you pay a lower multiple, it decreases; if the same, it stays unchanged.
Work full answer in app
William Blair
Given a DCF analysis, how would you identify and correct common errors?
Systematically audit the WACC inputs, verify FCF excludes interest and has correct NWC signs, ensure the terminal growth rate stays below nominal GDP with a normalized FCF, check the EV-to-equity bridge, and sanity-check implied multiples.
Work full answer in app
William Blair
LBO case: $1bn EV, $1bn sales, 10% EBITDA margin (so $100mm EBITDA), debt is 4x EBITDA, 10% growth annually.
This LBO yields approximately 2.0x MOIC and approximately 15% IRR in a standard simplified case assuming a 5-year hold, no multiple expansion, and no debt paydown. Specifically: entry EV is $1,000mm, debt is 4.0x EBITDA = $400mm, so sponsor equity is $600mm; EBITDA grows from $100mm to about $161mm by Year 5; exiting at the same 10.0x multiple gives exit EV of about $1,611mm; subtracting the original $400mm of debt gives exit equity of about $1,211mm; and $1,211mm / $600mm = about 2.0x MOIC, which implies about a 15% IRR. If you want to discuss debt paydown, you need additional assumptions on interest, taxes, capex, and working capital.
Work full answer in app
William Blair
What makes a good LBO candidate?
A good LBO candidate has strong, predictable free cash flow, low capex needs, a defensible market position, clear margin improvement opportunities, and growth avenues—traits that maximize returns through debt paydown, EBITDA growth, and multiple expansion.
Work full answer in app
William Blair
Given the LBO case with $1bn EV, $1bn sales, 10% EBITDA margin ($100mm EBITDA), debt at 4x EBITDA, and 10% annual growth, what is the IRR?
The IRR is approximately 15%, driven by 10% annual EBITDA growth amplified through leverage (40% debt, 60% equity), with no multiple expansion or debt paydown, yielding a ~2.0x MOIC over five years.
Work full answer in app
William Blair
Walk me through the M&A sell-side process.
The sell-side M&A process follows five phases: Preparation (model, CIM, buyer list), Round 1 (teasers, NDAs, IOIs), Round 2 (data room, management presentations, final bids), Negotiation & Signing (definitive agreement), and Closing (regulatory approvals, funds transfer).
Work full answer in app

Frequently Asked Questions

What does the William Blair interview process look like?

What should I focus on for a William Blair interview?

Sample William Blair IB Interview Questions

Frequently Asked Questions

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