[SCHEDULE 13G] Retension Pharmaceuticals, Inc. Passive Investment Disclosure (>5%)
Retension Pharmaceuticals: B Group reports 10% stake
The reported stake is held by B Group Capital LLC, while shared voting and disposition authority is also attributed to its adviser and the entities’ manager.
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Retension Pharmaceuticals, Inc. common stock: B Group Capital LLC holds 833,333 shares, equal to 10.00% of the class. The B Group, Inc., the LLC’s investment adviser, and Branden B. Muhl, identified as the controlling person and manager of the two entities, may each be deemed beneficial owners of those shares. Each reports shared voting and shared dispositive power over 833,333 shares. The percentage is based on 8,331,599 shares outstanding immediately after completion of the issuer’s initial public offering, as reported in a prospectus supplement filed October 9, 2026. The reporting persons expressly disclaim status as a group.
Shares beneficially owned833,333 sharesShares held by B Group Capital LLC; shared voting and dispositive power reported by each reporting person
Reported ownership10.00%Percentage of the issuer’s common stock reported for each reporting person
Shares outstanding8,331,599 sharesImmediately after completion of the initial public offering; basis for the reported ownership percentage
Key Terms
beneficially own, shared power to vote or to direct the vote, shared power to dispose or to direct the disposition, investment adviser
4 terms
beneficially ownregulatory
"may each be deemed to beneficially own the shares"
Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.
shared power to vote or to direct the voteregulatory
"shared power to vote or to direct the vote"
shared power to dispose or to direct the dispositionregulatory
"shared power to dispose or to direct the disposition"
investment adviserfinancial
"serves as investment adviser to B Group Capital LLC"
An investment adviser is a person or firm that professionally manages money and gives recommendations about buying, selling, or holding investments. Like a financial coach or guide, they have a legal duty to act in a client's best financial interest, so their advice, fees and potential conflicts can directly affect returns and risk — making their role important for investors who want informed, accountable help with portfolios.
FAQ
AI-generated questions and answers. How Rhea-AI works. Not financial advice.
How many RTSN shares does B Group Capital LLC own?
B Group Capital LLC holds 833,333 shares of Retension Pharmaceuticals common stock. The B Group, Inc. and Branden B. Muhl may each also be deemed beneficial owners of those same shares through their stated roles.
What percentage of RTSN does the reported ownership represent?
The reported ownership is 10.00% of the class. The percentage is based on 8,331,599 shares outstanding immediately after giving effect to completion of the initial public offering.
Who has voting and disposition power over the RTSN shares?
The three reporting persons each report shared voting power and shared dispositive power over 833,333 shares, with sole voting power and sole dispositive power reported as zero.
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
UNDER THE SECURITIES EXCHANGE ACT OF 1934
Retension Pharmaceuticals, Inc.
(Name of Issuer)
Common Stock, $0.0001 par value
(Title of Class of Securities)
76135H100
(CUSIP Number)
10/13/2026
(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):
76135H100
1
Names of Reporting Persons
The B Group, Inc.
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
KANSAS
Number of Shares Beneficially Owned by Each Reporting Person With:
5
Sole Voting Power
0.00
6
Shared Voting Power
833,333.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
833,333.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
833,333.00
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)
10.00 %
12
Type of Reporting Person (See Instructions)
IA, HC
SCHEDULE 13G
CUSIP Number(s):
76135H100
1
Names of Reporting Persons
B Group Capital 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
0.00
6
Shared Voting Power
833,333.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
833,333.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
833,333.00
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)
10.00 %
12
Type of Reporting Person (See Instructions)
OO
SCHEDULE 13G
CUSIP Number(s):
76135H100
1
Names of Reporting Persons
Branden B. Muhl
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
833,333.00
7
Sole Dispositive Power
0.00
8
Shared Dispositive Power
833,333.00
9
Aggregate Amount Beneficially Owned by Each Reporting Person
833,333.00
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)
10.00 %
12
Type of Reporting Person (See Instructions)
HC, IN
SCHEDULE 13G
Item 1.
(a)
Name of issuer:
Retension Pharmaceuticals, Inc.
(b)
Address of issuer's principal executive offices:
1104 West Broad Street #1029, Falls Church, Virginia 22046
Item 2.
(a)
Name of person filing:
Each of the following is hereinafter individually referred to as a "Reporting Person" and collectively as the "Reporting Persons." This statement is filed on behalf of:
The B Group, Inc.
B Group Capital LLC
Branden B. Muhl
The Reporting Persons expressly disclaim status as a "group" for purposes of this Schedule 13G.
(b)
Address or principal business office or, if none, residence:
The principal business address of The B Group, Inc. is 2900 McKinnon Street, Suite 1101, Dallas, Texas 75201.
The principal business address of each of B Group Capital LLC and Mr. Muhl is c/o The B Group, Inc., 2900 McKinnon Street, Suite 1101, Dallas, Texas 75201.
(c)
Citizenship:
The B Group, Inc. is organized under the laws of the State of Kansas.
B Group Capital LLC is organized under the laws of the State of Delaware.
Branden B. Muhl is a citizen of the United States.
(d)
Title of class of securities:
Common Stock, $0.0001 par value
(e)
CUSIP Number(s):
76135H100
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:
The information required by Item 4(a) is set forth in Row 9 of the cover page for each Reporting Person and is incorporated herein by reference.
This Schedule 13G relates to 833,333 shares of Common Stock held by B Group Capital LLC. The B Group, Inc. serves as investment adviser to B Group Capital LLC. Mr. Muhl is the controlling person and manager of The B Group, Inc. and B Group Capital LLC, respectively. In such capacities, The B Group, Inc. and Mr. Muhl may each be deemed to beneficially own the shares of Common Stock held by B Group Capital LLC.
(b)
Percent of class:
The information required by Item 4(b) is set forth in Row 11 of the cover page for each Reporting Person and is incorporated herein by reference.
Ownership percentages are based on 8,331,599 shares of the Issuer's Common Stock outstanding immediately after giving effect to the completion of the Issuer's initial public offering, as reported in the Prospectus Supplement filed pursuant to Rule 424(b)(4) by the Issuer with the Securities and Exchange Commission on October 9, 2026.
(c)
Number of shares as to which the person has:
(i) Sole power to vote or to direct the vote:
The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each Reporting Person and is incorporated herein by reference.
(ii) Shared power to vote or to direct the vote:
The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each Reporting Person and is incorporated herein by reference.
(iii) Sole power to dispose or to direct the disposition of:
The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each Reporting Person and is incorporated herein by reference.
(iv) Shared power to dispose or to direct the disposition of:
The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each Reporting Person and is incorporated herein by reference.
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:
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 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.
