Up 61 Percent, Then Sold: What the Mistras Take-Private Pays For

Mistras Group, a New Jersey provider of industrial inspection, non-destructive testing, and asset integrity services, agreed on Thursday to be taken private by H.I.G. Capital for $20.35 a share in cash. The price is an enterprise value of about $866 million including debt, roughly 9.85 times trailing EBITDA, and it arrives after a 61 percent rise in the stock since December 31. For a business owner, the interesting part is the sequence: a company spent two years on an operational turnaround, reported record results, raised guidance in August, and then sold in September at a slim premium to where it already traded. That is the decision every owner running an improvement program eventually faces, and the Mistras terms show how a buyer prices it.

The deal in four numbers

The first number is $20.35, an all-cash price described as an 8 percent premium to the 30-day volume-weighted average share price and 13 percent to the 90-day average. Against the prior day's close, the premium was under 3 percent. The board's statement leans on "immediate and certain cash value," the language a board uses when the stock has already done most of the work.

The second is 61 percent, the appreciation in the share price from December 31, 2025 to the offer. The market had spent nine months repricing Mistras on its Vision2030 program: four consecutive quarters of mid-single-digit revenue growth, record second-quarter adjusted EBITDA of $25.8 million at a 13.3 percent margin, first-half operating cash flow of $17.7 million against an outflow a year earlier, and leverage down to 2.2 times, the lowest since 2018. In August the company raised full-year guidance to $740 million to $755 million of revenue and $92 million to $95 million of adjusted EBITDA.

The third is 9.85 times, the trailing EBITDA multiple implied by the enterprise value, or roughly 9.3 times the midpoint of the raised 2026 guidance. Gross debt was $172 million at June 30, so the equity check is a little under $700 million.

The fourth is 40 days, the go-shop period that runs through October 27, during which the board and its adviser Baird may solicit competing bids. Holders of about 31 percent of the shares have agreed to vote for the H.I.G. deal, and closing is expected in late 2026 or early 2027.

What the buyer paid for

Strip away the public-company mechanics and this is a sponsor buying a services business at the end of a turnaround. That framing explains the premium and the multiple together.

The premium is small because the improvement was already in the price. Every quarter of margin expansion and every debt paydown showed up in the share price before H.I.G. arrived, so the buyer's offer only had to clear the market's current view, not the view from two years ago. A private company has no share price, but it has an equivalent: the trailing twelve months of adjusted EBITDA that a buyer's quality of earnings review (the accounting work that tests whether reported profit is sustainable and repeatable) will validate. Improvement that has flowed through the trailing twelve months gets paid for at the full multiple. Improvement that is still a plan gets paid for, if at all, through an earnout or a rollover, which is to say the seller keeps carrying the risk.

The multiple is a fair reflection of what Mistras is. Listed testing, inspection, and certification companies trade at a median of roughly 12 to 14 times EBITDA, with premium operators higher. Mistras sits below that band because its margins are lower than the sector leaders, a meaningful share of its revenue still comes from oil and gas, where activity fell 8 percent in the second quarter, and it is a labor-intensive field services business rather than an accredited laboratory network. A sponsor paid roughly 9.85 times for a platform with $750 million of revenue, a 13 percent margin, and growing exposure to aerospace, defense, infrastructure, and power. That is a reference point for any owner of an inspection, testing, or industrial services business, adjusted for size: smaller targets in the sector generally trade at seven to eight times, and the gap is what scale, diversification, and a technology layer are worth.

Why sell now rather than finish the plan

The obvious objection is that Mistras sold too early. Guidance was raised five weeks before the announcement, management still talks about capacity constraints in aerospace and defense, and the stated goal was two times leverage by year end. If the plan is working, why not finish it and sell for more?

The board's answer, in its own words, was certainty. Three features of the business explain why that is reasonable rather than timid.

The first is end-market risk. Oil and gas is still a large share of revenue and it is moving the wrong way. A single weak quarter in the legacy business could reset the stock and the multiple.

The second is execution risk. The remaining Vision2030 milestones involve capacity investment, automation, and working capital discipline. Each can slip, and each slip is visible in a quarterly report. Private ownership moves that risk to a buyer who is paid to carry it.

The third is the market. The Federal Reserve raised rates this week for the first time since 2023 and projects no cut before 2028, private equity fundraising is on pace for its weakest year since 2020, and sponsors are more selective. A committed all-cash buyer with $75 billion under management, willing to sign at a full multiple on record earnings, is not an offer to assume will still be there in two quarters.

The private-company version of this decision is the same. An owner who has spent two years improving margins and cleaning up the balance sheet can either sell on delivered results or keep going and sell on better ones. The second path pays more only if the improvement continues, the market holds, and the buyer is still there. The Mistras board took the delivered results and let the go-shop test whether anyone would pay for more.

How the board protected the price

Selling on delivered results does not mean accepting the first number. The Mistras structure shows three ways a seller protects itself after a run.

It signed with a go-shop rather than a no-shop. For 40 days the company can solicit a competing bid, and it can terminate for a superior proposal on payment of a fee. That is the public-company way of asking whether the signed price is the right one. A private seller gets the same answer by running a targeted process before signing a letter of intent, with two or three credible buyers at the table, rather than negotiating with one.

It locked in the buyer. Voting agreements covering 31 percent of the shares, an all-cash price, and a committed sponsor reduce the chance that the deal changes between signing and closing. In a private sale, the equivalent is a buyer with committed fund capital, a signed debt commitment, and a purchase agreement with a narrow set of closing conditions.

It sold on numbers a buyer could verify. Record EBITDA, improving cash conversion, and falling leverage were all in reviewed filings before the buyer arrived. A private owner gets there with a sell-side quality of earnings report that presents adjusted EBITDA and net working capital on the buyer's terms, so the improvement survives diligence instead of being renegotiated during it.

What to watch

The go-shop closes on October 27. A topping bid would show that a sponsor was willing to pay more for the unfinished plan; a quiet expiry would confirm the board's read that $20.35 was the market price for delivered results. The merger proxy will lay out the sale process, how many parties were contacted, and the financial analyses Baird used, a detailed record of how a services business at the end of a turnaround was valued in September 2026. And watch what H.I.G. does after closing. If it begins adding smaller inspection and testing companies to the Mistras platform, owners of those companies will find a new buyer in their market, one that has just set its own price for scale.