Driehaus discloses 10.49% stake in Andersen Group

Driehaus Capital Management LLC reports beneficial ownership of Andersen Group Inc. Class A common stock on a Schedule 13G. Driehaus has beneficial ownership of 1,412,934 shares of Class A common stock, representing 10.49% of the outstanding class.

Rhea-AI Filing Summary

Driehaus Capital Management LLC reports beneficial ownership of Andersen Group Inc. Class A common stock on a Schedule 13G. Driehaus has beneficial ownership of 1,412,934 shares of Class A common stock, representing 10.49% of the outstanding class.

Driehaus reports no sole voting or dispositive power over these shares, but shared voting and shared dispositive power over all 1,412,934 shares. The shares are held in numerous client accounts managed by Driehaus on a fully discretionary basis. Driehaus states that, to its knowledge, none of these clients has rights to dividends or sale proceeds relating to more than 5% of the class.

Key Figures

Shares beneficially owned: 1,412,934 shares Percent of class owned: 10.49% Sole voting power: 0 shares +3 more

6 metrics

Shares beneficially owned 1,412,934 shares Class A Common Stock beneficially owned by Driehaus Capital Management LLC

Percent of class owned 10.49% Percentage of Andersen Group Inc. Class A common stock class

Sole voting power 0 shares Shares with sole power to vote or direct the vote

Shared voting power 1,412,934 shares Shares with shared power to vote or direct the vote

Sole dispositive power 0 shares Shares with sole power to dispose or direct the disposition

Shared dispositive power 1,412,934 shares Shares with shared power to dispose or direct the disposition

Key Terms

beneficially owned, dispositive power, shared voting power, fully discretionary basis, +1 more

5 terms

beneficially owned financial

"Item 4. | Ownership (a) | Amount beneficially owned: 1412934"

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.

dispositive power financial

"Sole Dispositive Power 0.00 6 | Shared Dispositive Power 1,412,934.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

shared voting power financial

"Shared Voting Power 1,412,934.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

fully discretionary basis financial

"held by numerous clients on a fully discretionary basis in accounts managed by DCM"

Schedule 13G regulatory

"Ownership of more than 5 Percent on Behalf of Another Person."

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.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What percentage of Andersen Group Inc. (ANDG) does Driehaus Capital Management LLC own?

Driehaus Capital Management LLC reports beneficial ownership of 10.49% of Andersen Group Inc. Class A common stock. This corresponds to 1,412,934 shares held across numerous discretionary client accounts it manages.

How many Andersen Group Inc. (ANDG) shares does Driehaus Capital Management LLC report on its Schedule 13G?

Driehaus Capital Management LLC reports beneficial ownership of 1,412,934 Andersen Group Inc. Class A common shares. These shares are held in multiple client accounts over which Driehaus has investment discretion and certain voting and dispositive powers.

Does Driehaus Capital Management LLC have sole or shared voting power over its ANDG shares?

Driehaus reports 0 shares with sole voting power and 1,412,934 shares with shared voting power in Andersen Group Inc. Class A stock. It similarly has shared, but not sole, dispositive power over these shares.

What dispositive power does Driehaus Capital Management LLC report over Andersen Group Inc. (ANDG) shares?

Driehaus reports no sole dispositive power and shared dispositive power over 1,412,934 shares of Andersen Group Inc. Class A stock, reflecting its discretionary authority in managed client accounts.

Who ultimately benefits from the Andersen Group Inc. (ANDG) shares managed by Driehaus Capital Management LLC?

The 1,412,934 Andersen Group Inc. shares are held for numerous clients of Driehaus on a fully discretionary basis. Driehaus states that, to its knowledge, no single client benefits from more than 5% of the class.

What is the CUSIP and class of securities reported by Driehaus for Andersen Group Inc. (ANDG)?

Driehaus reports holdings in Class A Common Stock of Andersen Group Inc. with CUSIP 033853102. The filing covers beneficial ownership and related voting and dispositive powers for this security class.

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

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Available on EDGAR 08/05/2026 - 11:09 AM Accepted by SEC EDGAR 08/05/2026 - 11:08 AM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Andersen Group Inc.

(Name of Issuer)

Class A Common Stock

(Title of Class of Securities)

033853102

(CUSIP Number)

07/31/2026

(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): 033853102

1

Names of Reporting Persons

DRIEHAUS 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 0.00
6	Shared Voting Power 1,412,934.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 1,412,934.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,412,934.00

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)

10.49 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Andersen Group Inc.
(b)	Address of issuer's principal executive offices: 333 Bush Street, Suite 1700, San Francisco, California, 94104
Item 2.
(a)	Name of person filing: Driehaus Capital Management LLC
(b)	Address or principal business office or, if none, residence: 25 East Erie Street, Chicago, Illinois 60611
(c)	Citizenship: USA
(d)	Title of class of securities: Class A Common Stock
(e)	CUSIP Number(s): 033853102
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: 1412934
(b)	Percent of class: 10.49 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 0
	(ii) Shared power to vote or to direct the vote: 1412934
	(iii) Sole power to dispose or to direct the disposition of: 0
	(iv) Shared power to dispose or to direct the disposition of: 1412934
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.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The shares reported by Driehaus Capital Management LLC (DCM) are held by numerous clients on a fully discretionary basis in accounts managed by DCM. Securities held in these clients' accounts are included in this report to reflect that DCM may have voting power and has dispositive power. To the best of DCM's knowledge, none of the referenced clients have the right to receive dividends or direct proceeds from the sale of interests relating to more than 5% of the class.
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.

DRIEHAUS CAPITAL MANAGEMENT LLC

Signature:	Janet McWilliams
Name/Title:	General Counsel
Date:	08/05/2026