Mainline Investment Advisers, LLC

• A percentage of assets under your management
• Fixed fees (other than subscription fees)
• Performance-based fees
• Other

Item 5.E lists how the firm is compensated for its advice; Items 5.B, 6.A, and 7.A show whether its people or related companies can also earn commissions. Percentage of assets, fixed, hourly, subscription, and performance-based fees come from clients (a performance-based fee depends on investment results); commissions come with a sale or a trade, often from the company behind the product. How fees, commissions, and other arrangements differ

Asset-based fee: 0.25% to 2% a year (a range, as the brochure states it)

As stated in the firm's Form ADV Part 2A brochure dated March 30, 2026. Fees can differ by service and may be negotiable; the brochure is the complete statement. Read the brochure on the SEC's IAPD site

$109,927,979 as of October 2026, filing dated September 1, 2026.

A measure of scale, not skill or returns. Discretionary means the firm decides trades; non-discretionary means clients approve each one. What assets under management means

A firm with no individual clients is an institutional manager even if it manages billions; the mix tells you whom the practice is built around.

• Portfolio management for individuals and/or small businesses
• Portfolio management for pooled investment vehicles (other than investment companies)

Also doing business as

MAINLINE COMPANIES, MAINLINE INVESTMENTS

Registration

SEC-registered investment adviser. Status as filed: Approved.

Registered since

2011 (14 years)

Employees

Total: 4. Performing investment advisory functions: 3.

Wrap fee program participation

No.

States registered or notice-filed

3 states or jurisdictions

DEFLPA

SEC-registered investment advisers are examined by the SEC. SEC, state, and exempt registration

None Reports no disclosure items on Form ADV Item 11. View on IAPD.

Item 11 asks about criminal, regulatory, and civil events involving the firm and its advisory personnel. The detail of each yes answer is on the IAPD record. Reading a firm's disclosures

Regulatory assets under management: $404,993,715 in the October 2021 data and $109,927,979 in the October 2026 data, down 73%.

Total employees: 5 in October 2021 and 4 in October 2026.

As filed in each year's data for the same month. Assets under management move with markets as well as with clients coming and going; they measure scale, not skill or returns. Most firms update these figures once a year.

1. April 2026
   • Employees performing advisory functions went from 4 to 3.
   • Regulatory assets under management went from $200,838,563 to $109,796,880 (-45%).
2. December 2025
   • Updated its list of owners and control persons (Schedule A).

Compared month to month from the SEC's monthly adviser data and the state compilation feed. Owners and control persons are summarized, never named.