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| Mainline Investment Advisers LLC
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| CRD # | 159045 |
| SEC # | 801-72761 |
| CIK # | |
| AUM | 109.9 M (2026-04-28) |
| Employees | 4 (75% Investors, 25% Brokers) |
| Fees | |
| Minimum | |
| Phone | 610-896-3000 |
| Address | 308 E Lancaster Avenue Wynnewood, PA 19096-2145 |
| Source | [IAPD] [Website] [LinkedIn] |
| Total AUM ($M) |
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| Fees and Compensation — Form ADV Part 2A (3/30/2026) [Brochure] |
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Item 5 – Fees and Compensation
ADVISORY FEES
The Firm charges its clients annual advisory fees that generally range from 0.25% to
2.0% of an asset fee base. The asset fee base for an initial period of years (usually 3 to 5)
is equal to the client’s full committed capital regardless of how much has been
contributed by investors. After the initial period of years (usually 3 to 5), the asset fee
base will generally decrease over time with asset sales, write-offs or capital commitment
waivers, subject to certain caveats. The Firm may be granted a direct or indirect interest
in capital accounts (at no charge) in client funds as an indirect payment of advisory
services, or may negotiate a different type or amount of fee directly with its client. The
Firm sometimes receives fixed annual advisory fees. The specific fee charged depends
upon the type and complexity of services to be provided. In most cases, there is no
independent person who negotiates the Firm’s advisory fees. However, the specific fee
arrangements, exact fee start date, exact calculation of the asset fee base, and other types
of fees and expenses paid by each client are described in the client’s offering
memorandum or joint venture or other agreement negotiated directly with an investor or
client. Therefore, each investor typically knows what the fees are prior to deciding to
make an investment in that client or engage the Firm for providing investment
management services.
Sometimes the Firm’s clients may be funds of funds that invest in other clients of the
Firm or an advisory affiliate. The specifics of the Firm’s advisory fees may not be fully
known or disclosed to investors at the time of the offering of interests in a client that is a
fund of funds. The unknown specifics may include the fee percentage, the asset fee base
and the fee start date. We always attempt to charge fees that are fair and reasonable in
amount based on the type and complexity of the services provided. We generally expect
to select a fee start date that coincides with (i) when we started performing advisory
services, (ii) the date of the initial investor closing, (iii) when the client’s first investment
was made, or (iv) when subadvisory or other consulting fees are due.
Separately managed account fees are negotiable and memorialized in the advisory
agreement for each client. Please refer to Item 6 (Performance Based Fees and Side-by-
Side Management).
OTHER COMPENSATION, FEES AND EXPENSES
If other types of fees and expenses are paid by a client, they will be described in the
client’s offering memorandum or joint venture or other agreement negotiated directly
with an investor or client, if known.
Some of the other types of fees and expenses that usually will be paid by a private fund
client are: auditing fees and costs; custodial fees and costs; banking fees and costs;
franchise taxes and entity formation and maintenance fees; legal expenses; third party due
diligence expenses; securities and “blue sky” filing fees; an allocable portion of the costs
MainLine
Investment Advisers LLC
Part 2A of Form ADV: Firm Brochure Page 7
(including third party service fees) related to recording, managing and reporting of
accounting, tax and financial information, investor subscription processing, cash calls and
distributions; fees and costs related to asset management information technology and
software; fees and costs related to anti-money laundering and other regulatory
compliance; expenses related to roadshows and offering related activities; certain
placement fees; postage and travel expenses.
The private fund client also will reimburse the Firm or an affiliate for the services
performed by the Firm’s attorneys and accounting professionals directly to or for the
benefit of the client (whether the services relate to general administrative matters or the
business operations of the client). These will be paid only if the client would otherwise
have engaged outside professionals to perform the services. The fees that are charged do
not exceed rates customarily charged by outside attorneys or accounting professionals.
BILLING PROCEDURES
We charge advisory fees monthly in advance, but sometimes we charge fees quarterly or
semi-annually in advance. If the fee start date is not the first of a month, the first billing
period may include a partial month. If an advisory contract with a client is terminated
before the end of a billing period, the Firm will refund any overpayment of fees to the
client. The overpayment of fees will be calculated based on the number of full months
remaining in a billing period after the contract was terminated. No refund will be given
for a partial month.
Under most advisory contracts with Firm clients, after an initial period of years (usually 3
to 5), we can collect advisory fees only out of cash available for distribution and not out
of capital contributions made by investors to the client. If cash is not available to pay
advisory fees in the period earned, the fees may be accrued and their payment deferred.
We collect deferred fees when cash becomes available before cash distributions are made
to investors, unless we waive payment of those fees at the sole discretion of the Firm. If
a client does not deploy all of the capital originally committed by investors, and as a
result elects to reduce the amount of such uncalled capital commitment, advisory fees that
have already been paid or accrued on such uncalled capital will not be refunded.
... |
| Account Minimums and Types of Clients — Form ADV Part 2A (3/30/2026) [Brochure] |
|---|
Item 7 – Types of Clients
Please refer to Item 4 above.
Some of the Firm’s clients are individuals or entities that have engaged us to provide
non-discretionary investment management services under a separately managed account
agreement. The Firm’s advisory clients, however, are usually private equity, real estate,
or venture capital investment funds. Some of our clients are limited partnerships or
limited liability companies that are related to us because there is some common
ownership and/or control between the Firm’s owner or an advisory affiliate and the
general partners or managers of those clients. Some of our clients are funds of funds,
meaning that they invest in other investment funds that may or may not be related to us.
These clients are expected to be closed end (meaning they do not accept additional
subscribers after a stated offering period) investment funds with capital committed by
investors that is usually drawn down and contributed over time to purchase investment
securities or assets that are not securities and pay expenses. Sometimes capital is all due
upon initial subscription, and sometimes fund expenses are paid under an expense
MainLine
Investment Advisers LLC
Part 2A of Form ADV: Firm Brochure Page 9
reimbursement program with investors. Most of our clients do not offer redemption
rights or liquidity to their investors. Our fund clients’ investors are typically (but not
exclusively) high net worth individuals and trusts and other family investment entities
created by those individuals and in some cases may be considered institutional accounts.
Some investors may be institutions. Investors often invest in more than one fund or other
related investment opportunity.
We also manage separate advisory accounts for individual or institutional investors
investing in private companies, or an institutional investor may be the only investor or
one of only a few investors in an advised private fund or venture capital fund.
Item 8 – Method of Analysis, Investment Strategies and Risk of Loss
METHOD OF ANALYSIS AND INVESTMENT STRATEGY
The Firm advises its clients primarily about making investments in private companies.
Each client will have a specific strategy and investment focus that is described in the
client’s offering memorandum or joint venture or other agreement negotiated directly
with an investor or client. Some clients may have strategies similar to other clients. The
client’s offering memorandum and/or limited partnership or operating agreement, joint
venture or other agreement negotiated directly with an investor may include specific
guidelines or restrictions on investments. The Firm’s role is to (i) find investment
opportunities that fit the client’s specific strategy, (ii) diligently investigate each
investment’s benefits and risks (called due diligence), (iii) make recommendations to
each client whether to buy, hold or sell an investment, and (iv) monitor the performance
of investments made. The Firm will review its recommendations against any specific
guidelines or restrictions on the client’s investments.
The Firm does not make the final investment decisions. The final investment decisions
are made by the general partners or managers of the various investment funds that are our
clients. As stated elsewhere in this brochure, there typically is common ownership or
control between the Firm or an advisory affiliate and some of those general partners or
managers. In cases of separately managed accounts, clients make the final investment
decisions.
DUE DILIGENCE
MLIA’s Investment Professionals or its consultants perform due diligence on each
investment opportunity. Due diligence will vary depending on the type of investment but
will usually include some or all of the following:
• Review, preparation and/or analysis of business plan
• Review and negotiation of legal documents relevant to the security
• Review of insurance coverage
• Review of historical financial information
• Research and analysis of market information
MainLine
Investment Advisers LLC
Part 2A of Form ADV: Firm Brochure Page 10
• Research and review of competition
• Review, preparation and/or analysis of financial projections
• Interviews and/or background checks of key company management and
joint venture partners
• Lien searches of company assets and real estate
• Review of material contracts and other company data
The above is not an exhaustive list, nor does every item on the list apply to all investment
opportunities. Moreover, due diligence performed on funds of funds tends to cover the
manager(s) of funds versus the underlying assets. MLIA’s Investment Professionals use
their experience and expertise to review each investment opportunity in a diligent way.
For certain items on the list that require special expertise, consultants may be engaged on
behalf of the client to perform research and prepare reports. Our employees then review
and analyze those third-party reports. In addition, legal counsel is engaged on behalf of
each client to prepare or review and negotiate legal documents with reasonable and
customary provisions to protect the interests of the client. The client pays the fees and
costs of consultants and legal counsel. To the extent affiliated consultants or legal
counsel are engaged to provide services, the fees that are charged do not exceed rates
... |
| Type | Form D Funds | Date | Sold | AUM |
|---|---|---|---|---|
| PE | Cape US Artestar LLC | 2025-03-31 | 18.2 M | |
| PE | K Diamond LLC | 2025-03-31 | 5.2 M | |
| VC | Mainline TU-K Industries LLC | [2023-03-30] | 6.9 M | 5.1 M |
| Offered $6,948,235 · Filed 2022-12-08 (D/A) · Exemption 506(b), 3(c), 3(c)(1), 3(c)(7) · Duration One year or less · Commission $32,375 · Revenue Decline to Disclose | ||||
| PE | MLH Altmed LLC | 2018-03-29 | 10.8 M | |
| PE | MLH Holdings LLC | 2018-03-29 | 55.8 M | |
| PE | MLIP MLH Investments LLC | [2018-03-29] | 10.3 M | 17.8 M |
| Offered $10,276,667 · Filed 2018-04-05 (D) · Exemption 506(b) · Duration One year or less · Commission $50,000 · Revenue Decline to Disclose | ||||
| RE | Mainline CALA del Sol Partners LP | 2016-03-28 | 5.7 M | |
| PE | Mainline So/Unequal Partners LP | 2014-03-28 | 0.0 M | |
| PE | Mainline Special Opportunities Fund LP | 2014-03-28 | 0.0 M | |
| PE | CMS/CGF IV LP | 2012-01-24 | ||
| View All | ||||
| AUM Breakdown | Accounts | AUM ($M) |
|---|---|---|
| By Client Type | ||
| (a) Individuals (other than high net worth individuals) | 0 | 0.0 |
| (b) Individuals (high net worth individuals) | 7 | 2.0 |
| (c) Banking or thrift institutions | 0 | 0.0 |
| (d) Investment companies | 0 | 0.0 |
| (e) Business development companies | 0 | 0.0 |
| (f) Pooled investment vehicles | 9 | 107.9 |
| (g) Pension and profit sharing plans | 0 | 0.0 |
| (h) Charitable organizations | 0 | 0.0 |
| (i) State or municipal government entities | 0 | 0.0 |
| (j) Other investment advisers | 0 | 0.0 |
| (k) Insurance companies | 0 | 0.0 |
| (l) Sovereign wealth funds and foreign official institutions | 0 | 0.0 |
| (m) Corporations or other businesses not listed above | 0 | 0.0 |
| (n) Other | 0 | 0.0 |
| Total | 15 | 109.9 |
| By Discretionary | ||
| Discretionary | 6 | 84.4 |
| Non-Discretionary | 9 | 25.5 |
| Total | 15 | 109.9 |
| By Non-United States Persons | ||
| Non-United States Persons | 0.0 | |
| United States Persons | 109.9 | |
| Total | 15 | 109.9 |
| Form D Directors | Role | # Filings | # Firms | 2011 - 2026 |
|---|---|---|---|---|
| William Landman | Executive Officer | 64 | 5 | |
| Mark Solomon | Executive Officer | 46 | 4 | |
| Richard Mitchell | Executive Officer | 31 | 4 | |
| Ingrid Welch | Executive Officer | 7 | 4 | |
| Paul Silberberg | Executive Officer | 7 | 4 | |
| Morey Goldberg | Executive Officer | 7 | 4 | |
| John Adams | Executive Officer | 54 | 3 | |
| David Clapper | Executive Officer | 45 | 3 | |
| William Romanelli | Executive Officer | 2 | 2 | |
| Mainline Investment Partners LLC | Executive Officer | 1 | 1 | |
| View All | ||||
| Firm Profile (Form ADV) | |
|---|---|
| Clients | 1 |
| Serves | Institutional, Retail |
| Fund Types | Private Equity, Real Estate |
| Related Firms | State | AUM |
|---|---|---|
|
Mainline Investment Advisers LLC
✚
|
PA | 109.9 M |
|
Merion Realty Advisers LLC
✚
|
PA | 99.3 M |
|
CMS Fund Advisers LLC
✚
|
PA |
| Comparable Firms | State | AUM |
|---|---|---|
|
Pactolus Private Wealth Management LLC
✚
|
VA | 187.8 M |
|
Cain Capital LLC
✚
|
TX | 171.2 M |
|
Matrix Planning Inc
✚
|
CA | 121.4 M |
|
Optimal Capital Advisors LLC
✚
|
MI | 119.9 M |
|
Alpha Fiduciary Inc
✚
|
AZ | 114.0 M |
|
Birnam Wood Capital LLC
✚
|
TX | 106.1 M |
|
Hudson Valley Wealth Management Inc
✚
|
NY | 48.8 M |
|
B C Ziegler and Company
✚
|
IL | |
|
NMS Capital Asset Management Inc
✚
|
CA | |
|
Seavest Family Office LLC
✚
|
NY |