What must happen before Grant Thornton-CBIZ can close?

As of August 4, 2026, the Grant Thornton Advisors-CBIZ transaction is signed, public, and still in its go-shop period. The controlling public record is CBIZ’s Form 8-K dated July 28, 2026, with exhibits; under that record, the go-shop remains open until 11:59 p.m. ET on August 27, 2026, and the merger cannot close unless the stockholder, antitrust, legal-order, and adverse-effect conditions are cleared or, where the agreement permits it, waived. That is the practical center of the legal implications: not whether the transaction has a large headline value, but which dated obligations still stand between signing and closing. [1]

The agreement was entered into among CBIZ, Viking ParentCo, Inc., a Delaware corporation, and Viking MergerCo, Inc.; CBIZ would survive the merger as a wholly owned subsidiary of Parent. The consideration is $55.00 per share in cash, and CBIZ’s filing describes the transaction as representing an approximately $5 billion enterprise value and an approximately 54% premium to CBIZ’s 30-day volume-weighted average share price. The same filing also describes $5.2 billion of committed financing from New Mountain Partners VII, L.P., New Mountain Partners VII Luxembourg, SCSp, and third-party sources. [1]

Current closing checklist, last verified August 4, 2026

The table is not a status announcement that the deal is “on track.” It is a set of gates. Some are controlled by CBIZ stockholders, some by government timing, some by conduct between signing and closing, and some by whether any legally operative restraint appears before the transaction can be consummated.

The deal is still in the part of the agreement where CBIZ can test the market

The go-shop is the first dated right that matters. Until 11:59 p.m. ET on August 27, 2026, CBIZ has the contractual room described in the filing to solicit and engage with alternative acquisition proposals. After that point, the agreement shifts into the no-shop framework, with the important caveat that qualifying Excluded Parties can continue under the 15-day tail. [1]

That tail is not decorative. It means the August 27 deadline is not necessarily the last day on which an alternative path can remain alive. If a party qualifies as an Excluded Party under the agreement, CBIZ may still have a defined post-go-shop runway for that party. For a closing checklist, the right question after August 27 is therefore not simply “did the go-shop end?” It is whether any Excluded Party survived the end of the go-shop and, if so, when that party’s 15-day period expires. [1]

Only after that does the transaction move into the cleaner no-shop posture that deal summaries tend to assume from the start. Until the go-shop and any Excluded Party tail have been resolved, a public-company stockholder vote is not the only route by which the signed deal can be challenged.

Stockholder approval is a majority-of-outstanding-shares condition

CBIZ stockholders still have to adopt the merger agreement. The filing states the approval condition as approval by holders of a majority of CBIZ’s outstanding shares, which is more demanding than a majority of shares merely present and voting at a meeting. [1]

That distinction is not a drafting footnote. In a majority-of-outstanding-shares vote, non-votes and abstentions can matter because the denominator is the outstanding share count. For the in-house team maintaining the closing tracker, the relevant work is not finished when proxy materials are prepared; it continues through record-date mechanics, solicitation, vote tabulation, and any adjournment decision if the required majority is not yet in hand.

HSR expiration is a condition, not a prediction

The antitrust condition is framed around the expiration or termination of the applicable waiting period under the Hart-Scott-Rodino Act. That language should be read literally. It does not say that antitrust clearance has already occurred; it says the waiting-period condition must be satisfied before closing. [1]

For a transaction of this scale in professional services, the waiting-period item is one of the simplest items to describe and one of the least useful to wave away. Until the HSR condition is satisfied, closing is not legally available even if the business narrative is settled and the stockholder vote is favorable. The closing file needs the date and evidence of expiration or termination, not an expectation that the parties intend to close.

The no-prohibitory-law and no-MAE conditions are separate gates

The merger is conditioned on the absence of any law or governmental order prohibiting the transaction. It is also conditioned on the absence of a Company Material Adverse Effect since signing. Those are different conditions and should not be blended into a general “regulatory approval” line. [1]

A prohibitory-law condition asks whether a legal restraint prevents the parties from closing. A Company Material Adverse Effect condition asks whether the agreed risk allocation has been crossed by events affecting the company. The first can arise from an external legal order; the second turns on the agreement’s definition and the facts between signing and closing. Both are completion risks, but they are tested differently.

The agreement also includes marketing-period mechanics, so even after key approvals are obtained, the closing date may still be shaped by the agreement’s financing-related timing structure rather than by the first day on which the parties announce that conditions are generally progressing. [1]

The termination structure prices different failures differently

The agreement does not treat all broken paths as economically equivalent. CBIZ’s filing describes a $107.5 million company termination fee, reduced to $49.6 million in specified go-shop or Excluded Party scenarios. It also describes a $198.4 million parent fee backed by a limited guarantee from Grant Thornton Advisors LLC. [1]

The reduced company fee is the number to watch during the go-shop and Excluded Party period. The larger company fee is the background number for other specified company-side terminations. The parent fee and limited guarantee sit on the other side of the risk allocation, where the agreement prices specified parent-side failure. Treating the transaction as simply “subject to customary closing conditions” misses the fee architecture that gives those conditions practical force.

The outside date supplies the long stop. July 28, 2027 is the agreement’s drop-dead date, but it should not be read as a forecast that the parties expect to use the full period. It is a termination reference point. If the transaction has not closed by then, the parties’ rights turn on the agreement’s conditions, exceptions, and any party-specific responsibility for the failure to close. [1]

Appraisal rights give dissenting stockholders a separate statutory route

CBIZ’s filing flags appraisal rights under Section 262 of the Delaware General Corporation Law. A CBIZ stockholder who properly perfects appraisal rights, does not withdraw the demand, and does not otherwise lose those rights will not receive the merger consideration for the shares subject to appraisal; that stockholder instead proceeds under the statutory appraisal process. [1]

This matters because stockholder approval and stockholder payout are not the same event. The vote determines whether the agreement is adopted by the required majority. Appraisal determines what happens to a stockholder who follows the statutory dissent route for eligible shares. For closing purposes, appraisal rights usually do not read like a separate approval condition unless the agreement says so; for stockholder communications and litigation monitoring, they are still part of the legal surface.

The valuation lines use different baselines

The safest valuation shorthand is the one in CBIZ’s filing: $55.00 per share in cash, approximately $5 billion in enterprise value, and an approximately 54% premium to the 30-day VWAP. [1]

Other coverage uses different premium baselines. Reuters described the cash price as a 17.8% premium to CBIZ’s last closing price before the announcement. That is not inconsistent with a 54% premium to the 30-day VWAP; it is a different denominator. [2]

This distinction matters in a legal tracker because valuation language can creep into fairness, disclosure, and stockholder-litigation arguments. “$5 billion deal” is an enterprise-value frame in the filing. “Premium” is not a single number unless the baseline is stated.

Industry significance is real, but it is not a closing condition

The transaction is large enough to move the professional-services rankings conversation. The Journal of Accountancy framed the combination as potentially creating a new top-five firm, and Reuters treated the announcement as a major professional-services acquisition. [2][3]

That context explains why the agreement will attract scrutiny, but it does not replace the filed conditions. Professional-services combinations carry additional execution surfaces because ownership structures, attest independence, non-CPA ownership restrictions, and alternative practice structures can affect how accounting-related businesses are organized and governed. Hunton Andrews Kurth’s discussion of accounting-firm alternative practice structures is useful background for why these transactions are not ordinary operating-company mergers from a regulatory-design perspective. [4]

Insurance Business also treated the related insurance and benefits business separation as a notable part of the transaction setting. That kind of business-line movement is relevant to timing and integration planning, but the filing’s closing checklist remains the document to test before saying the merger can close. [5]

The litigation and retention flags are timing risks, not failure predictions

CBIZ’s own filing lists forward-looking risk factors that include shareholder litigation in connection with the transaction, the ability to obtain financing, and retention of key personnel. Those are not conclusions that the transaction will fail. They are disclosed surfaces that can affect timing, cost, disclosure obligations, or closing certainty. [1]

At least one shareholder investigation notice had already appeared publicly after the announcement. The Kuznicki Law notice is evidence of a litigation surface, not evidence that a claim has merit or that an injunction will issue. [6]

Financing belongs in the same measured category. The filing describes $5.2 billion of committed financing, which is an important support fact, but committed financing and funded closing are not the same event. The agreement’s parent-fee and limited-guarantee structure exists because the documents price specified failure scenarios rather than assuming financing risk disappears upon signing. [1]

What must be rechecked next

The next hard verification point is the go-shop expiration at 11:59 p.m. ET on August 27, 2026. The immediate follow-up question is whether any Excluded Party survived into the 15-day tail. [1]

• After the go-shop deadline: confirm whether CBIZ disclosed any qualifying Excluded Party or superior-proposal process update. [1]
• Before any closing statement: confirm adoption by holders of a majority of outstanding CBIZ shares. [1]
• Before treating regulatory timing as cleared: confirm expiration or termination of the applicable HSR waiting period. [1]
• Before assuming conditions are satisfied: check for any law or governmental order prohibiting the merger and for any asserted Company Material Adverse Effect. [1]
• Before treating stockholder remedies as settled: check appraisal-rights disclosures and any transaction-related litigation filings. [1][6]
• If the deal remains open deep into 2027: recheck the July 28, 2027 outside date and any extension, waiver, or termination filing. [1]

As of August 4, 2026, the Grant Thornton Advisors-CBIZ merger is not a closed transaction. It is a signed agreement with an open go-shop, a majority-stockholder vote still ahead, an HSR waiting-period condition, legal-restraint and Company Material Adverse Effect conditions, appraisal consequences, and fee-backed exits. The record should be rechecked after the go-shop expires, after any stockholder-action filing, after any HSR development, after any litigation update, and after any SEC filing that changes the closing-condition picture.

References

1. Form 8-K, U.S. Securities and Exchange Commission, July 28, 2026
2. Grant Thornton to buy professional services firm CBIZ in $5 billion cash deal, Reuters, July 29, 2026
3. A new top 5 firm? Grant Thornton acquiring fellow top 10 firm CBIZ, Journal of Accountancy, July 2026
4. Forming an Accounting Firm Alternative Practice Structure: Key Considerations, Hunton Andrews Kurth
5. A $400 million insurance and benefits business is about to become its own company, Insurance Business
6. CBIZ, Inc., Kuznicki Law PLLC