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Thermon (THR) director exchanges shares in CECO cash-stock merger

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Thermon Group Holdings director George J. Marcus reported the disposition of 52,689 shares of Thermon common stock in connection with a completed merger with CECO Environmental Corp. The shares included 50 held indirectly for minor children and 52,639 held directly, with post‑transaction holdings shown as zero for both positions.

Under the Merger Agreement, each Thermon share was converted into the right to receive one of three forms of consideration, subject to proration: a default mixed package of 0.6840 CECO common shares plus $10.00 in cash per share, an all‑cash payment of $63.89 per share, or 0.8110 CECO shares per share. Marcus elected the mixed consideration and disclaims beneficial ownership of the securities except to the extent of any pecuniary interest.

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Insider GEORGE MARCUS J
Role null
Type Security Shares Price Value
Disposition Common Stock 52,639 $0.00 --
Disposition Common Stock 50 $0.00 --
Holdings After Transaction: Common Stock — 0 shares (Direct, null); Common Stock — 0 shares (Indirect, Shares held by minor children living in the same household as reporting person.)
Footnotes (1)
  1. Pursuant to the terms of the Agreement and Plan of Merger dated February 23, 2026 (the "Merger Agreement") by and among the Issuer, CECO Environmental Corp ("CECO"), and two wholly-owned merger subsidiaries of CECO (the "Merger Subs"), the Issuer merged with the two Merger Subs to become a wholly-owned subsidiary of CECO (the "Merger"). Pursuant to the terms of the Merger Agreement, each share of Issuer common stock (other than excluded and dissenting shares) was converted into the right to receive, at the election of the holder, one of the following forms of merger consideration, subject to proration as described in the Merger Agreement: (i) 0.6840 shares of CECO common stock and $10.00 in cash, without interest (the "mixed consideration"), which is the default election; (ii) $63.89 in cash, without interest (the "cash consideration"); or (iii) 0.8110 shares of CECO common stock (the "stock consideration"). The reporting person elected the mixed consideration for their shares of Issuer common stock. Reporting person disclaims beneficial ownership of the securities, except to the extent of a pecuniary interest therein.
Total shares disposed 52,689 shares Thermon common stock surrendered in merger-related disposition
Indirect shares disposed 50 shares Held for minor children in same household
Direct shares disposed 52,639 shares Director’s directly held Thermon common stock
Mixed consideration terms 0.6840 CECO shares + $10.00 cash Default merger consideration per Thermon share
All-cash consideration $63.89 per share Optional cash-only merger consideration per Thermon share
Stock-only consideration 0.8110 CECO shares Optional stock-only merger consideration per Thermon share
Agreement and Plan of Merger financial
"Pursuant to the terms of the Agreement and Plan of Merger dated February 23, 2026..."
An Agreement and Plan of Merger is a formal document where two companies agree to combine into one, outlining how the process will happen. It’s like a step-by-step plan for merging, and it matters because it shows both sides have agreed on the details before the official transition takes place.
Merger Agreement financial
"Pursuant to the terms of the Merger Agreement, each share of Issuer common stock..."
A merger agreement is a binding contract that lays out the exact terms for two companies to combine, including the price, what each side will deliver, and the conditions that must be met before the deal is completed. Investors care because it sets the timetable, payouts and risks — like a blueprint or prenup that shows whether the deal is likely to close, how ownership will change, and what could cancel or alter the payout they expect.
mixed consideration financial
"0.6840 shares of CECO common stock and $10.00 in cash... (the "mixed consideration")"
Mixed consideration is a deal payment made with a combination of cash and other assets, most commonly shares or securities, rather than all cash. Investors care because receiving or issuing part-stock can change a company’s cash reserves and ownership structure—like paying partly in money and partly in gift cards—affecting shareholder dilution, short-term liquidity and the future value of the deal.
cash consideration financial
"ii) $63.89 in cash, without interest (the "cash consideration");"
Cash consideration is the actual money paid to buy a company, asset, or stake rather than payment in shares or other forms. For investors it matters because cash payments deliver immediate, certain value and affect the buyer’s and seller’s cash reserves and balance sheets—like selling a car for cash versus taking a trade-in, one side gets instant spending power while the other changes its liquidity and risk profile.
stock consideration financial
"iii) 0.8110 shares of CECO common stock (the "stock consideration")."
Stock consideration is when a company pays for an acquisition, merger, or other corporate deal by issuing its own shares instead of using cash. It matters to investors because receiving or issuing stock changes who owns what: sellers get a stake in the combined business and existing shareholders see their piece of the company shrink, similar to adding more slices to a pie. That shift affects potential returns, voting control, and future share value.
disclaims beneficial ownership financial
"Reporting person disclaims beneficial ownership of the securities, except to the extent of a pecuniary interest therein."
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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
X
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
GEORGE MARCUS J

(Last)(First)(Middle)
7171 SOUTHWEST PARKWAY
BUILDING 300, SUITE 200

(Street)
AUSTIN TEXAS 78735

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Thermon Group Holdings, Inc. [ THR ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
Officer (give title below)Other (specify below)
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock06/01/2026D52,639(1)(2)D(1)(2)0D
Common Stock06/01/2026D50(1)(2)D(1)(2)0IShares held by minor children living in the same household as reporting person.(3)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Explanation of Responses:
1. Pursuant to the terms of the Agreement and Plan of Merger dated February 23, 2026 (the "Merger Agreement") by and among the Issuer, CECO Environmental Corp ("CECO"), and two wholly-owned merger subsidiaries of CECO (the "Merger Subs"), the Issuer merged with the two Merger Subs to become a wholly-owned subsidiary of CECO (the "Merger").
2. Pursuant to the terms of the Merger Agreement, each share of Issuer common stock (other than excluded and dissenting shares) was converted into the right to receive, at the election of the holder, one of the following forms of merger consideration, subject to proration as described in the Merger Agreement: (i) 0.6840 shares of CECO common stock and $10.00 in cash, without interest (the "mixed consideration"), which is the default election; (ii) $63.89 in cash, without interest (the "cash consideration"); or (iii) 0.8110 shares of CECO common stock (the "stock consideration"). The reporting person elected the mixed consideration for their shares of Issuer common stock.
3. Reporting person disclaims beneficial ownership of the securities, except to the extent of a pecuniary interest therein.
/s/ Ryan Tarkington, Attorney-in-Fact06/03/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did Thermon Group (THR) report in this Form 4?

Thermon Group director George J. Marcus reported a disposition of Thermon common stock tied to a merger with CECO Environmental. A total of 52,689 shares were surrendered to the issuer as Thermon became a wholly owned CECO subsidiary.

How many Thermon (THR) shares did George J. Marcus dispose of in the merger?

George J. Marcus disposed of 52,689 Thermon common shares in total. This included 50 shares held indirectly for minor children and 52,639 shares held directly, with both positions reported as zero shares following the merger transaction.

What consideration could Thermon (THR) shareholders elect in the CECO merger?

Each Thermon share converted into a right to choose among three merger packages, subject to proration: a mixed consideration of 0.6840 CECO shares plus $10.00 cash, an all‑cash $63.89 payment, or 0.8110 CECO shares per Thermon share.

Which merger consideration did George J. Marcus choose for his Thermon (THR) shares?

George J. Marcus elected the mixed consideration for his Thermon shares. That package provides 0.6840 shares of CECO common stock plus $10.00 in cash per Thermon share, subject to proration as described in the Merger Agreement.

Was the Thermon (THR) insider transaction an open‑market sale?

No, the transaction was not an open‑market sale. It was reported as a disposition to the issuer in connection with Thermon’s merger into CECO’s subsidiaries, reflecting conversion of Thermon shares into merger consideration rather than trading on the market.

Does George J. Marcus claim full beneficial ownership of the Thermon (THR) shares?

No, he does not claim full beneficial ownership. The filing states that the reporting person disclaims beneficial ownership of the securities, except to the extent of a pecuniary interest in those shares or related merger consideration.