Pioneer Acquisition I Corp ownership disclosure: D. E. Shaw reporting persons state beneficial ownership of 1,252,350 Class A ordinary shares of Pioneer Acquisition I Corp, representing 5.7% of the outstanding Class A shares as of 03/31/2026.
The filing lists the holdings under D. E. Shaw & Co., L.P., D. E. Shaw & Co., L.L.C., D. E. Shaw Valence Portfolios, L.L.C., and David E. Shaw, each reported as having shared voting and shared dispositive power over the same 1,252,350 shares. Signatures and powers of attorney dated 08/01/2024 and a joint filing agreement dated 05/15/2026 are included.
Positive
None.
Negative
None.
Insights
Large passive stake reported: D.E. Shaw entities hold 1,252,350 shares (5.7%).
The filing shows a consolidated beneficial position of 1,252,350 shares held through D. E. Shaw Valence Portfolios, L.L.C., with shared voting and dispositive power. The position is reported under a Schedule 13G-style ownership disclosure, indicating passive investment reporting conventions.
Implications depend on filing status and intent; subsequent filings may show changes in voting intent or form. Cash‑flow treatment and sale/transaction plans are not provided in the excerpt.
Shared control and POAs underpin the reported beneficial ownership.
Signatures reference powers of attorney dated 08/01/2024, which the filing cites to explain delegated authority. The report attributes shared voting and dispositive power to multiple related entities and to David E. Shaw via organizational relationships.
Investors looking for governance signals should watch for any Form 13D/13G amendments or Form 4/Form 5 filings that would change the classification or disclose active intent.
Key Figures
Beneficial ownership:1,252,350 sharesPercent of class:5.7%CUSIP:G7117W107+2 more
5 metrics
Beneficial ownership1,252,350 sharesClass A ordinary shares as of 03/31/2026
Percent of class5.7%Percentage of outstanding Class A shares
CUSIPG7117W107Class A ordinary shares identifier
Power of Attorney dates08/01/2024Exhibits cited for delegated authority
Joint Filing Agreement date05/15/2026Date of Joint Filing Agreement among reporting persons
"Amount beneficially owned: D. E. Shaw & Co., L.P.: 1,252,350 shares"
Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.
shared dispositive powerregulatory
"Shared Dispositive Power 1,252,350.00"
Schedule 13Gregulatory
"form_type: SCHEDULE 13G"
A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.
What stake does D.E. Shaw report in Pioneer Acquisition I Corp (PACH)?
D.E. Shaw reporting persons state beneficial ownership of 1,252,350 shares, equal to 5.7% of Class A shares as of 03/31/2026. The position is held via D.E. Shaw Valence Portfolios, L.L.C., and reported jointly.
Which entities are listed as reporting persons for the PACH filing?
The filing lists D. E. Shaw & Co., L.P., D. E. Shaw & Co., L.L.C., D. E. Shaw Valence Portfolios, L.L.C., and David E. Shaw as joint reporting persons with a shared beneficial position.
Does David E. Shaw directly own the reported PACH shares?
The filing states David E. Shaw does not own shares directly but may be deemed to beneficially own the 1,252,350 shares through organizational relationships; the filing also includes a disclaimer of direct beneficial ownership by Mr. Shaw.
What voting and dispositive powers are reported over the PACH shares?
Each reporting person is shown with 0 sole voting and 1,252,350 shared voting powers, and 0 sole dispositive and 1,252,350 shared dispositive powers over the Class A shares.
What identifiers and exhibits accompany the ownership disclosure?
The CUSIP for the Class A ordinary shares is G7117W107. Exhibits include powers of attorney dated 08/01/2024 and a joint filing agreement dated 05/15/2026 signed by the reporting persons.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Pioneer Acquisition I Corp
(Name of Issuer)
Class A ordinary shares, par value $0.0001 per share
(Title of Class of Securities)
G7117W107
(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):
G7117W107
1
Names of Reporting Persons
D. E. Shaw & Co., L.P.
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
0.00
6
Shared Voting Power
1,252,350.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,252,350.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,252,350.00
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)
5.7 %
12
Type of Reporting Person (See Instructions)
IA, PN
SCHEDULE 13G
CUSIP Number(s):
G7117W107
1
Names of Reporting Persons
D. E. Shaw & Co., L.L.C.
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
0.00
6
Shared Voting Power
1,252,350.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,252,350.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,252,350.00
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)
5.7 %
12
Type of Reporting Person (See Instructions)
OO
SCHEDULE 13G
CUSIP Number(s):
G7117W107
1
Names of Reporting Persons
D. E. Shaw Valence Portfolios, L.L.C.
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
0.00
6
Shared Voting Power
1,252,350.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,252,350.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,252,350.00
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)
5.7 %
12
Type of Reporting Person (See Instructions)
OO
SCHEDULE 13G
CUSIP Number(s):
G7117W107
1
Names of Reporting Persons
David E. Shaw
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
UNITED STATES
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
1,252,350.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
1,252,350.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
1,252,350.00
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)
5.7 %
12
Type of Reporting Person (See Instructions)
IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Pioneer Acquisition I Corp
(b)
Address of issuer's principal executive offices:
131 Concord Street, Brooklyn, NY 11201
Item 2.
(a)
Name of person filing:
D. E. Shaw & Co., L.P.
D. E. Shaw & Co., L.L.C.
D. E. Shaw Valence Portfolios, L.L.C.
David E. Shaw
(b)
Address or principal business office or, if none, residence:
The business address for each reporting person is:
Two Manhattan West
375 Ninth Avenue, 52nd Floor
New York, NY 10001
(c)
Citizenship:
D. E. Shaw & Co., L.P. is a limited partnership organized under the laws of the state of Delaware.
D. E. Shaw & Co., L.L.C. is a limited liability company organized under the laws of the state of Delaware.
D. E. Shaw Valence Portfolios, L.L.C. is a limited liability company organized under the laws of the state of Delaware.
David E. Shaw is a citizen of the United States of America.
(d)
Title of class of securities:
Class A ordinary shares, par value $0.0001 per share
(e)
CUSIP Number(s):
G7117W107
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:
D. E. Shaw & Co., L.P.: 1,252,350 shares
This is composed of 1,252,350 shares in the name of D. E. Shaw Valence Portfolios, L.L.C.
D. E. Shaw & Co., L.L.C.: 1,252,350 shares
This is composed of 1,252,350 shares in the name of D. E. Shaw Valence Portfolios, L.L.C.
D. E. Shaw Valence Portfolios, L.L.C.: 1,252,350 shares
David E. Shaw: 1,252,350 shares
This is composed of 1,252,350 shares in the name of D. E. Shaw Valence Portfolios, L.L.C.
David E. Shaw does not own any shares directly. By virtue of David E. Shaw's position as President and sole shareholder of D. E. Shaw & Co., Inc., which is the general partner of D. E. Shaw & Co., L.P., which in turn is the investment adviser of D. E. Shaw Valence Portfolios, L.L.C., and by virtue of David E. Shaw's position as President and sole shareholder of D. E. Shaw & Co. II, Inc., which is the managing member of D. E. Shaw & Co., L.L.C., which in turn is the manager of D. E. Shaw Valence Portfolios, L.L.C., David E. Shaw may be deemed to have the shared power to vote or direct the vote of, and the shared power to dispose or direct the disposition of, the 1,252,350 shares as described above constituting 5.7% of the outstanding shares, and, therefore, David E. Shaw may be deemed to be the beneficial owner of such shares. David E. Shaw disclaims beneficial ownership of such 1,252,350 shares.
(b)
Percent of class:
D. E. Shaw & Co., L.P.: 5.7%
D. E. Shaw & Co., L.L.C.: 5.7%
D. E. Shaw Valence Portfolios, L.L.C.: 5.7%
David E. Shaw: 5.7%
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
D. E. Shaw & Co., L.P.: 0 shares
D. E. Shaw & Co., L.L.C.: 0 shares
D. E. Shaw Valence Portfolios, L.L.C.: 0 shares
David E. Shaw: 0 shares
(ii) Shared power to vote or to direct the vote:
D. E. Shaw & Co., L.P.: 1,252,350 shares
D. E. Shaw & Co., L.L.C.: 1,252,350 shares
D. E. Shaw Valence Portfolios, L.L.C.: 1,252,350 shares
David E. Shaw: 1,252,350 shares
(iii) Sole power to dispose or to direct the disposition of:
D. E. Shaw & Co., L.P.: 0 shares
D. E. Shaw & Co., L.L.C.: 0 shares
D. E. Shaw Valence Portfolios, L.L.C.: 0 shares
David E. Shaw: 0 shares
(iv) Shared power to dispose or to direct the disposition of:
D. E. Shaw & Co., L.P.: 1,252,350 shares
D. E. Shaw & Co., L.L.C.: 1,252,350 shares
D. E. Shaw Valence Portfolios, L.L.C.: 1,252,350 shares
David E. Shaw: 1,252,350 shares
Item 5.
Ownership of 5 Percent or Less of a Class.
Not Applicable
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:
Not Applicable
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.
D. E. Shaw & Co., L.P.
Signature:
/s/ Daniel R. Marcus
Name/Title:
Daniel R. Marcus / Chief Compliance Officer
Date:
05/15/2026
D. E. Shaw & Co., L.L.C.
Signature:
/s/ Daniel R. Marcus
Name/Title:
Daniel R. Marcus / Authorized Signatory
Date:
05/15/2026
D. E. Shaw Valence Portfolios, L.L.C.
Signature:
/s/ Daniel R. Marcus
Name/Title:
Daniel R. Marcus / Authorized Signatory
Date:
05/15/2026
David E. Shaw
Signature:
/s/ Daniel R. Marcus
Name/Title:
Daniel R. Marcus / Attorney-in-Fact for David E. Shaw
Date:
05/15/2026
Comments accompanying signature: Exhibit 1: Power of Attorney, granted by David E. Shaw relating to D. E. Shaw & Co., Inc., in favor of the signatories hereto, among others, dated August 1, 2024.
Exhibit 2: Power of Attorney, granted by David E. Shaw relating to D. E. Shaw & Co. II, Inc., in favor of the signatories hereto, among others, dated August 1, 2024.
Exhibit Information
Exhibit 3: Joint Filing Agreement, by and among the Reporting Persons, dated May 15, 2026.
