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  4. [Form 3] Standard Nuclear, Inc. Initial Statement of Beneficial Ownership

Standard Nuclear (STDN) backers detail Series Seed and Series A preferred stakes

Filing Impact
(Neutral)
Filing Sentiment
(Neutral)
Form Type
3

Rhea-AI Filing Summary

Fundomo SN-001, LP and Fundomo SN-002, LP, each a 10% owner of Standard Nuclear, report holdings of preferred stock that will convert into Class A common stock in connection with the initial public offering. Indirect positions include Series Seed-1 Preferred Stock (14000000 underlying Class A shares, held by ST-1014 Fund I) and Series A-2 Preferred Stock (2027576 underlying shares), and a direct Series A Preferred Stock stake (3849782 underlying shares). The preferred shares convert automatically at a 1-for-1 ratio and have no expiration date. The reporting persons disclaim beneficial ownership except to the extent of any pecuniary interest, and voting and dispositive power over ST-1014 Fund I’s shares is delegated irrevocably to an unaffiliated investment adviser.

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Insider Fundomo SN-001, LP, Fundomo SN-002, LP
Role 10% Owner | 10% Owner
Type Security Shares Price Value
holding Series A Preferred Stock F1, F2, F3, F4 -- -- --
holding Series A-2 Preferred Stock F1 -- -- --
holding Series Seed-1 Preferred Stock F1 -- -- --
Holdings After Transaction: Series A Preferred Stock — 3,849,782 shares (Direct); Series A-2 Preferred Stock — 2,027,576 shares (Indirect, By Fundomo SN-002, LP.); Series Seed-1 Preferred Stock — 14,000,000 shares (Indirect, By ST-1014 Fund I, a series of Fundomo Syndicates, LP)
Footnotes (4)
  1. F1. In connection with the completion of the Issuer's initial public offering of its Class A Common Stock, each share of Series Seed-1 Preferred Stock, Series A Preferred Stock, and Series A-2 Preferred Stock will automatically convert into shares of Class A Common Stock of the Issuer at a ratio of 1-for-1. The securities have no expiration date.
  2. F2. Fundomo SN-001 GP, LLC ("SN-001 GP") is the sole general partner of Fundomo SN-001, LP ("SN-001"). Fundomo SN-002 GP, LLC ("SN-002 GP") is the sole general partner of Fundomo SN-002, LP ("SN-002"). Corey Nobile is the sole member of SN-001 GP and SN-002 GP. Each of SN-001 GP, SN-002 GP, and Corey Nobile may be deemed to share voting and dispositive power with respect to the shares held directly by SN-001 (in the case of SN-001 GP) and SN-002 (in the case of SN-002 GP), respectively.
  3. F3. ST-1014 Fund I, a series of Fundomo Syndicates, LP ("ST-1014 Fund I") may be considered an affiliate of SN-001, SN-002, SN-001 GP and SN-002 GP, but voting and dispositive power over the shares held directly by ST-1014 Fund I has been delegated on an irrevocable basis to an unaffiliated third-party investment adviser pursuant to the terms of ST-1014 Fund I's limited partnership agreement, and none of the reporting persons named herein has voting or dispositive power over such shares.
  4. F4. Each of the reporting persons and entities disclaims beneficial ownership of the reported securities (except to the extent of such person's or entity's pecuniary interest in such securities). The filing of this statement by the reporting persons shall not be deemed an admission that such persons are, for purposes of Section 16 of the Securities and Exchange Act of 1934 or otherwise, the beneficial owner of any equity securities covered by this statement.
Series Seed-1 underlying Class A shares 14000000.0000 shares Underlying Class A common stock from Series Seed-1 Preferred Stock held indirectly
Series A underlying Class A shares 3849782.0000 shares Underlying Class A common stock from Series A Preferred Stock held directly
Series A-2 underlying Class A shares 2027576.0000 shares Underlying Class A common stock from Series A-2 Preferred Stock held indirectly
Conversion ratio to Class A common 1-for-1 Automatic conversion of each preferred share into one Class A share at IPO completion
initial public offering financial
"In connection with the completion of the Issuer's initial public offering"
An initial public offering (IPO) is when a private company first sells its shares to the public and becomes a stock-listed company. It matters because it allows the company to raise money from a wide range of investors, helping it grow, while giving early shareholders a way to sell some of their ownership.
voting and dispositive power regulatory
"may be deemed to share voting and dispositive power with respect to the shares"
pecuniary interest regulatory
"disclaims beneficial ownership of the reported securities (except to the extent of such person's or entity's pecuniary interest"
beneficial ownership regulatory
"disclaims beneficial ownership of the reported securities (except to the extent"
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.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What insider holdings does the Form 3 for STDN disclose?
The Form 3 reports Fundomo-affiliated entities holding Series Seed-1, Series A, and Series A-2 Preferred Stock in Standard Nuclear, which together are convertible into millions of Class A common shares in connection with the company’s initial public offering.

How many Standard Nuclear (STDN) Class A shares are underlying the reported preferred stock?
The filing lists 14000000 underlying Class A shares from Series Seed-1, 3849782 from Series A, and 2027576 from Series A-2 Preferred Stock, all referenced as convertible into Class A common on a 1-for-1 basis.

When and how will the preferred shares in Standard Nuclear (STDN) convert?
Each share of Series Seed-1, Series A, and Series A-2 Preferred Stock will automatically convert 1-for-1 into Class A common stock in connection with completion of Standard Nuclear’s initial public offering, and the securities are described as having no expiration date.

Who has voting and dispositive power over ST-1014 Fund I’s Standard Nuclear (STDN) shares?
Voting and dispositive power over shares held directly by ST-1014 Fund I has been delegated on an irrevocable basis to an unaffiliated third-party investment adviser, and the reporting persons state they do not have voting or dispositive power over those shares.

Do the reporting persons in the STDN Form 3 claim full beneficial ownership of the reported securities?
No. The reporting persons and related entities disclaim beneficial ownership of the reported securities, except to the extent of any person’s or entity’s pecuniary interest, and state that the filing should not be deemed an admission of beneficial ownership under Section 16.

What role do Fundomo SN-001, LP and Fundomo SN-002, LP play in relation to Standard Nuclear (STDN)?
Fundomo SN-001, LP and Fundomo SN-002, LP are each identified as a 10% owner of Standard Nuclear. General partner entities and an individual, Corey Nobile, may be deemed to share voting and dispositive power over shares held directly by these partnerships, subject to stated disclaimers.
SEC Form 3
FORM 3UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

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:3235-0104
Estimated average burden
hours per response:0.5
1. Name and Address of Reporting Person*
Fundomo SN-001, LP
(Last)(First)(Middle)
401 PARK AVE. S.
10TH FLOOR
(Street)
NEW YORK NEW YORK 10010
(City)(State)(Zip)
UNITED STATES
(Country)		2. Date of Event Requiring Statement (Month/Day/Year)
07/15/2026		3. Issuer Name and Ticker or Trading Symbol
Standard Nuclear, Inc. [ STDN ]
3a. Foreign Trading Symbol
5. If Amendment, Date of Original Filed (Month/Day/Year)
4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
DirectorX10% Owner
Officer (give title below)Other (specify below)
6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
XForm filed by More than One Reporting Person
Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4) 2. Amount of Securities Beneficially Owned (Instr. 4) 3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 4. Nature of Indirect Beneficial Ownership (Instr. 5)
Table II - Derivative Securities Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4) 2. Date Exercisable and Expiration Date (Month/Day/Year)3. Title and Amount of Securities Underlying Derivative Security (Instr. 4) 4. Conversion or Exercise Price of Derivative Security 5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5) 6. Nature of Indirect Beneficial Ownership (Instr. 5)
Date ExercisableExpiration DateTitleAmount or Number of Shares
Series A Preferred Stock (1) (1)Class A Common Stock3,849,782(1)D(2)(3)(4)
Series A-2 Preferred Stock (1) (1)Class A Common Stock2,027,576(1)IBy Fundomo SN-002, LP.
Series Seed-1 Preferred Stock (1) (1)Class A Common Stock14,000,000(1)IBy ST-1014 Fund I, a series of Fundomo Syndicates, LP
1. Name and Address of Reporting Person*
Fundomo SN-001, LP
(Last)(First)(Middle)
401 PARK AVE. S.
10TH FLOOR
(Street)
NEW YORK NEW YORK 10010
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
1. Name and Address of Reporting Person*
Fundomo SN-002, LP
(Last)(First)(Middle)
401 PARK AVE. S.
10TH FLOOR
(Street)
NEW YORK NEW YORK 10016
(City)(State)(Zip)
UNITED STATES
(Country)
Relationship of Reporting Person(s) to Issuer
DirectorX10% Owner
Officer (give title below)Other (specify below)
Explanation of Responses:
1. In connection with the completion of the Issuer's initial public offering of its Class A Common Stock, each share of Series Seed-1 Preferred Stock, Series A Preferred Stock, and Series A-2 Preferred Stock will automatically convert into shares of Class A Common Stock of the Issuer at a ratio of 1-for-1. The securities have no expiration date.
2. Fundomo SN-001 GP, LLC ("SN-001 GP") is the sole general partner of Fundomo SN-001, LP ("SN-001"). Fundomo SN-002 GP, LLC ("SN-002 GP") is the sole general partner of Fundomo SN-002, LP ("SN-002"). Corey Nobile is the sole member of SN-001 GP and SN-002 GP. Each of SN-001 GP, SN-002 GP, and Corey Nobile may be deemed to share voting and dispositive power with respect to the shares held directly by SN-001 (in the case of SN-001 GP) and SN-002 (in the case of SN-002 GP), respectively.
3. ST-1014 Fund I, a series of Fundomo Syndicates, LP ("ST-1014 Fund I") may be considered an affiliate of SN-001, SN-002, SN-001 GP and SN-002 GP, but voting and dispositive power over the shares held directly by ST-1014 Fund I has been delegated on an irrevocable basis to an unaffiliated third-party investment adviser pursuant to the terms of ST-1014 Fund I's limited partnership agreement, and none of the reporting persons named herein has voting or dispositive power over such shares.
4. Each of the reporting persons and entities disclaims beneficial ownership of the reported securities (except to the extent of such person's or entity's pecuniary interest in such securities). The filing of this statement by the reporting persons shall not be deemed an admission that such persons are, for purposes of Section 16 of the Securities and Exchange Act of 1934 or otherwise, the beneficial owner of any equity securities covered by this statement.
Remarks:
SN-001 GP, SN-002 GP, and Corey Nobile will be reported as Reporting Persons on a subsequent or separate Form 3, if applicable, once CIK codes are received. Any information required to be reported on behalf of ST-1014 Fund I and its related beneficial owners will be filed separately, as applicable.
Fundomo SN-001, LP. By: Fundomo SN-001 GP, LLC, its general partner, By: /s/ Corey Nobile, Sole Member07/16/2026
Fundomo SN-002, LP. By: Fundomo SN-002 GP, LLC, its general partner, By: /s/ Corey Nobile, Sole Member07/16/2026
** 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 5 (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 3: SEC 1473 (03-26)

Source: View Original Filing on SEC EDGAR