What SEC Form 425 Is and Why It Shows Up the Day a Merger Is Announced

SEC Form 425 is the EDGAR form type for written communications about a business combination, filed under Securities Act Rule 425. It appears on announcement day because the rule requires filing on the date of first use. In 2026, Weatherford filed its 1 June press release for the NCS Multistage deal this way, and Digital Asset Acquisition Corp. filed its $250 million merger with Titan Strategics in October. (Status as of 15 October 2026.)

This explainer covers what the form is, why the timing is so tight, what two 2026 filings contained, and what to read once you find one.

What is SEC Form 425?

Form 425 is the form type companies use on EDGAR to file business combination communications under Rule 425 of the Securities Act of 1933. The rule says that all written communications made in reliance on Rule 165 are prospectuses that must be filed on the date of first use.

The filing is not a standalone report with its own template. It is a wrapper. The company attaches or reproduces the communication, such as a press release, and adds the required cover-page details. Under Rule 425(c), the upper right corner of the cover page must identify the filer, the subject company and the Commission file number.

Why does Form 425 appear the day a merger is announced?

The timing comes from two rules working together. Rule 165(a) lets the offeror of securities in a business combination to be registered communicate from the first public announcement until the registration statement is filed. The condition is that any written communication is filed under Rule 425.

Rule 425 then sets the clock. Communications made in reliance on Rule 165 are filed on the date of first use. Communications limited to the information in Rule 135 are filed on or before the date of first use. The announcement press release is the first written communication, so it is filed that day.

Rule 165 also attaches conditions. Each communication must carry a prominent legend urging investors to read the relevant documents filed or to be filed with the SEC, explaining that they are free on the SEC website. That is why both examples below carry a "Where to Find It" legend.

The rule has some slack. Under Rule 165(e), an immaterial or unintentional failure to file, or a delay, does not violate Section 5 if the company made a good faith and reasonable effort and files as soon as practicable after discovering the miss.

What did two 2026 Form 425 filings look like?

Both examples below are stock-funded deals, and both were filed with the Rule 425 box or header visible on the first page. They differ in shape: one is a bare press release, the other is a full 8-K with the merger agreement attached.

Source for the table: the Weatherford filing and the DAAQ filing.

What was in the Weatherford and NCS Multistage filing?

The filing is the joint press release of 1 June 2026. Its header states it was filed by Weatherford International plc pursuant to Rule 425, with NCS Multistage Holdings, Inc. as subject company. That is the Rule 425(c) cover information in practice.

The release carries the deal terms the companies chose to announce. The companies say NCS stockholders can elect either 0.554 Weatherford shares, or 0.239 shares plus cash equal to 0.137 shares, subject to proration. On a blended basis, the companies say, that equals 0.463 shares per NCS share, with up to 19.99% of the equity consideration payable in cash.

The release also contains company claims about value. Weatherford says annual cost synergies should be at least $15 million within 18 months of closing. These are projections from the companies, not audited results. The release says both boards and an NCS controlling stockholder holding more than 50% approved the deal, and that closing is expected in the second half of 2026.

The NCS side filed too. NCS Multistage's Form 8-K, with a date of report of 31 May 2026, reports the merger agreement under Item 1.01 and has the Rule 425 box ticked on its cover page.

What was in the Digital Asset Acquisition Corp. filing?

Digital Asset Acquisition Corp., a Cayman Islands special purpose acquisition company based in Princeton, New Jersey, filed an 8-K reporting a merger agreement dated 7 October 2026 with Titan Strategics Holdings Ltd. EDGAR lists the filing as a Form 425, and its cover page has the Rule 425 box ticked.

The 8-K states that DAAQ agreed to acquire all of Titan's equity for a Base Purchase Price of $250,000,000, made up of 25,000,000 shares valued at $10.00 each. DAAQ is to domesticate from the Cayman Islands to Delaware and change its name to Renaissance Nuclear, Inc.

The press release of 8 October 2026 adds company-stated figures. DAAQ says the pro-forma combined enterprise value is $318 million and that it has a signed $15 million PIPE commitment from an accredited investor. It describes Titan as the exploration license holder over the former Ranstad uranium mine in Sweden.

This filing shows a point that is easy to miss: a 425 can carry the full contract. The merger agreement, dated 7 October 2026, is Exhibit 2.1 to the 425 filing. EDGAR also lists a Form 8-K (accession 0001213900-26-108077) with the same document name, so the same text was submitted under two form types.

Does Form 425 come before the 8-K?

Not necessarily. Both NCS Multistage and DAAQ ticked the 8-K cover-page box that lets one filing simultaneously satisfy the Rule 425 obligation, and DAAQ's document appears under both form types. The rule requires filing by the date of first use, which in practice means announcement day.

The practical advice is to open both the 425 and the 8-K. An 8-K Item 1.01 gives the contract summary. The 425 may carry the press release and other written deal material. If you are checking who is running a company after a deal, the related walkthrough on reading an 8-K Item 5.02 covers that side of the filing.

Per Rule 425's notes, communications filed under the rule are also deemed filed under the other applicable sections, including Rules 14a-12(b), 14d-2(b), 14d-9(a) and 13e-4(c). One filing can therefore do several jobs.

How do you find the terms faster using Form 425?

Search the acquirer or target on EDGAR and filter by form type "425". Open the earliest filing and check the cover for the filer, subject company and file number. Then read in this order:

1. The header block. It tells you who filed and who the subject company is, so you know which side's stock is being issued.
2. The first paragraph of the release. It usually states the consideration and the exchange ratio or price. Treat every figure as company-stated.
3. The "Additional Information" legend. It names the follow-on filing: Form S-4, proxy statement/prospectus or Schedule 14C, as in the two examples above.
4. Any exhibits. DAAQ attached the full merger agreement. Weatherford's filing was the release alone.
5. The 8-K for the same date. Item 1.01 summarizes the agreement, and Item 5.02 would cover executive changes.

For a comparison from the funding side, the post on reading a Form D before the press release shows the same habit applied to private rounds. For another deal told through its filings, see the write-up on Cirrus Logic's INVENTVM acquisition or Mistras and H.I.G. Capital.

What's still unclear?

Several limits apply to what a Form 425 can tell you.

• Order of filing. A 425 does not always come before the 8-K. In the NCS Multistage and DAAQ examples, the 8-K cover page itself has the Rule 425 box ticked.
• Press release versus contract. A 425 press release is the company's summary. Synergy targets, enterprise values and PIPE commitments are the companies' own statements. The binding terms are in the merger agreement and the later registration statement.
• Which deals need one. Rule 165 is written for offerors of securities in a business combination to be registered under the Securities Act. That fits stock deals. For purely cash deals, check the 8-K.
• Scope of "written communications." The rule text covers written communications made in connection with the transaction, apart from non-public communications among participants. Companies file many types of documents under it, beyond the two examples here.
• Duplicate filings. DAAQ's document appears under two accession numbers and two form types. Expect repeat or near-identical entries when searching EDGAR.

Last checked: 15 October 2026. This article is an explainer of public filings, not legal advice.