Westchester Capital Management, LLC filed an amendment reporting beneficial ownership of 767,556 Class A ordinary shares of SIM Acquisition Corp. I, representing 3.34% of the class. The filing cites March 27, 2026 for a 23,000,000 share outstanding base, as reported in the issuer's Form 10-K.
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Insights
Westchester reports a modest 3.34% stake in SIMA
Westchester Capital Management, acting as sub-advisor to multiple funds, reports beneficial ownership of 767,556 shares. The filing breaks down voting and dispositive power into 57,845 sole and 709,711 shared positions, which indicates much of the position is held via collective fund arrangements.
Position size is explicitly tied to an outstanding share base of 23,000,000 shares as of March 27, 2026. Subsequent filings would show any material changes to these holdings.
Amendment confirms reporting and attribution details
The Schedule 13G/A lists Westchester as a Delaware-organized registered adviser and discloses its role as sub-advisor to four named funds. The signature by the Chief Compliance Officer formalizes the amendment.
Owners and investors can rely on the filing for an explicit vote/disposition split; any legal or regulatory implications will depend on future disclosures or changes in percent ownership.
Key Figures
Beneficial ownership:767,556 sharesPercent of class:3.34%Shares outstanding:23,000,000 shares+2 more
5 metrics
Beneficial ownership767,556 sharesAmount beneficially owned as reported in the Schedule 13G/A
Percent of class3.34%Percent of Class A ordinary shares reported in Item 4
Shares outstanding23,000,000 sharesShares outstanding as of <date>March 27, 2026</date>, cited from issuer's Form 10-K
Sole voting power57,845 sharesSole power to vote as reported in Item 4
Shared voting power709,711 sharesShared power to vote as reported in Item 4
Key Terms
Schedule 13G/A, beneficial ownership, CUSIP
3 terms
Schedule 13G/Aregulatory
"Amendment No. 1 and header identifying the filing type"
A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
CUSIPfinancial
"CUSIP No.: G8431T101"
A CUSIP is a nine-character alphanumeric code that uniquely identifies a U.S. or Canadian financial security—such as a stock, bond, or fund share—like a Social Security number for an investment. It matters to investors because brokers, exchanges and record-keepers use the CUSIP to match trades, track ownership, settle transactions and pull accurate records, reducing errors and ensuring money and securities go to the right place.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
(Amendment No. 1)
SIM Acquisition Corp. I
(Name of Issuer)
Class A ordinary shares, $0.0001 par value per share
(Title of Class of Securities)
G8431T101
(CUSIP Number)
03/31/2026
(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
Rule 13d-1(b)
Rule 13d-1(c)
Rule 13d-1(d)
schemaVersion:
SCHEDULE 13G
CUSIP Number(s):
G8431T101
1
Names of Reporting Persons
WESTCHESTER CAPITAL MANAGEMENT, LLC
2
Check the appropriate box if a member of a Group (see instructions)
(a)
(b)
3
Sec Use Only
4
Citizenship or Place of Organization
DELAWARE
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
57,845.00
6
Shared Voting Power
709,711.00
7
Sole Dispositive Power
57,845.00
8
Shared Dispositive Power
709,711.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
767,556.00
10
Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)
11
Percent of class represented by amount in row (9)
3.34 %
12
Type of Reporting Person (See Instructions)
IA
Comment for Type of Reporting Person: * Based on 23,000,000 Shares outstanding as of March 27, 2026, as reported in the Issuer's Annual Report on Form 10-K filed with the Securities and Exchange Commission on March 27, 2026.
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
SIM Acquisition Corp. I
(b)
Address of issuer's principal executive offices:
725 Fifth Avenue, 22nd Floor, New York, NY 10022
Item 2.
(a)
Name of person filing:
Westchester Capital Management, LLC ("Westchester"), a Delaware limited liability company.
Westchester, a registered investment adviser, serves as sub-advisor to each of The Merger Fund ("MF"), The Merger Fund VL ("MF VL"), Virtus Westchester Credit Event Fund ("CEF") and JNL Multi-Manager Alternative Fund ("JARB", together with MF, MF VL and CEF, the "Funds"). The Funds directly hold Ordinary Shares of the Company for the benefit of the investors in those Funds. Mr. Roy Behren and Mr. Michael T. Shannon each serve as Co-Presidents of Westchester.
(b)
Address or principal business office or, if none, residence:
Westchester Capital Management, LLC
100 Summit Lake Drive, Valhalla, NY 10595
(c)
Citizenship:
Westchester is organized under the laws of the State of Delaware.
(d)
Title of class of securities:
Class A ordinary shares, $0.0001 par value per share
(e)
CUSIP No.:
G8431T101
Item 3.
If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)
Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)
Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)
Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)
Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)
An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)
An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)
A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)
A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)
A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)
A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J),
please specify the type of institution:
(k)
Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.
Ownership
(a)
Amount beneficially owned:
767,556
(b)
Percent of class:
3.34%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
57,845
(ii) Shared power to vote or to direct the vote:
709,711
(iii) Sole power to dispose or to direct the disposition of:
57,845
(iv) Shared power to dispose or to direct the disposition of:
709,711
Item 5.
Ownership of 5 Percent or Less of a Class.
Ownership of 5 percent or less of a class
Item 6.
Ownership of more than 5 Percent on Behalf of Another Person.
Not Applicable
Item 7.
Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
Not Applicable
Item 8.
Identification and Classification of Members of the Group.
Not Applicable
Item 9.
Notice of Dissolution of Group.
Not Applicable
Item 10.
Certifications:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.
SIGNATURE
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.
What stake does Westchester Capital report in SIMA?
Westchester reports beneficial ownership of 767,556 shares of SIM Acquisition Corp. I, equal to 3.34% of the Class A ordinary shares, as stated in the amendment.
What voting and dispositive powers are disclosed by Westchester for SIMA?
The filing shows 57,845 shares with sole voting and dispositive power and 709,711 shares with shared voting and dispositive power, totaling 767,556 shares.
What outstanding share base does the amendment reference for SIMA?
The amendment references an outstanding share base of 23,000,000 shares as of March 27, 2026, cited from the issuer's Annual Report on Form 10-K filed the same date.
Which funds hold the SIMA shares on behalf of Westchester?
Westchester states it serves as sub-advisor to The Merger Fund (MF), The Merger Fund VL (MF VL), Virtus Westchester Credit Event Fund (CEF), and JNL Multi-Manager Alternative Fund (JARB), which directly hold the disclosed shares.
