Investment adviser · CRD 159045

MAINLINE INVESTMENT ADVISERS, LLC

Investment adviser filing (IA)

WYNNEWOOD, PA, United States · Form ADV filed Sep 1, 2026

Regulatory AUM: $110M
Client accounts: 15
Employees: 4
Advisory professionals: 3

Who they report serving

Form ADV · Item 5.D

Client types and their share of reported regulatory assets.

Client type	Clients	Regulatory assets	Share of AUM
Pooled investment vehicles	9	$107,927,979	98.2%
High-net-worth individuals	7	$2,000,000	1.8%

Filing source

Form ADV 2114409 · Sep 1, 2026 · Item 5.D

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

Private funds & service providers

31 Private funds

The count excludes feeder funds. Funds in the latest filing appear first, ordered by reported gross assets. Earlier funds retain their last reported values.

MLH HOLDINGS, LLCPrivate Equity Fund · Last reported Sep 1, 2026$55.8MGross asset value

Auditor CBIZ CPAS P.C. DEERFIELD, Illinois, United States

Custodian MIDLAND TRUST COMPANY (ACQUIRED BY EQUITY TRUST COMPANY) FT. MYERS, Florida, United States Related to adviser: No

Marketer 3ICO SECURITIES LLC WYNNEWOOD, Pennsylvania, United States Related to adviser: Yes

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: No
External marketing: Yes

CBIZ CPAS P.C.
PCAOB 199

3ICO SECURITIES LLC
CRD 173648 · SEC 8-69544

Fund details & source

Fund ID: 805-1200686018
Reported beneficial owners: 3
Minimum commitment: $2M

Form ADV 2114409 · Sep 1, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

CAPE US ARTESTAR, LLCPrivate Equity Fund · Last reported Sep 1, 2026$18.3MGross asset value

Fund administrator IQ-EQ FUND SERVICES (JERSEY) LIMITED ST. HELIER (CHANNEL ISLANDS), Jersey Investor statements: Yes (provided to all investors) Related to adviser: No

Auditor BDO USA, P.C. PHILADELPHIA, Pennsylvania, United States

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: No
Administrator other than the adviser: Yes
External marketing: No

BDO USA, P.C.
PCAOB 243

Fund details & source

Fund ID: 805-8762343990
Reported beneficial owners: 28
Minimum commitment: $0

Form ADV 2114409 · Sep 1, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

MLIP MLH INVESTMENTS, LLCPrivate Equity Fund · Last reported Sep 1, 2026$17.8MGross asset value

Form D fundraising filings

MLIP MLH Investments, LLC

Auditor CBIZ CPAS P.C. DEERFIELD, Illinois, United States

Custodian MIDLAND TRUST COMPANY (ACQUIRED BY EQUITY TRUST COMPANY) FT. MYERS, Florida, United States Related to adviser: No

Marketer 3ICO SECURITIES LLC WYNNEWOOD, Pennsylvania, United States Related to adviser: Yes

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: No
External marketing: Yes

CBIZ CPAS P.C.
PCAOB 199

3ICO SECURITIES LLC
CRD 173648 · SEC 8-69544

Fund details & source

Fund ID: 805-6384835300
Reported beneficial owners: 3
Minimum commitment: $1M
Form D file number: 021-309450

Form ADV 2114409 · Sep 1, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

MAINLINE CALA DEL SOL PARTNERS, L.P.Real Estate Fund · Last reported Sep 1, 2026$5.65MGross asset value

Custodian PRINCIPAL BANK MINNEAPOLIS, Minnesota, United States Related to adviser: No

Marketer M HOLDINGS SECURITIES, INC. PORTLAND, Oregon, United States Related to adviser: No

Provider details

Annual audit: No
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: No
External marketing: Yes

M HOLDINGS SECURITIES, INC.
CRD 43285 · SEC 801-57304

Fund details & source

Fund ID: 805-4185388981
Reported beneficial owners: 5
Minimum commitment: $400K
Form D file number: 021-1651269

Form ADV 2114409 · Sep 1, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

K DIAMOND LLCPrivate Equity Fund · Last reported Sep 1, 2026$5.24MGross asset value

Feeder funds

K DIAMOND BLOCKER LLC

Fund administrator IQ-EQ FUND SERVICES (JERSEY) LIMITED ST. HELIER (CHANNEL ISLANDS), Jersey Investor statements: Yes (provided to all investors) Related to adviser: No

Provider details

Annual audit: No
Prime brokers: No
Custodians: No
Administrator other than the adviser: Yes
External marketing: No

Fund details & source

Fund ID: 805-9603269098
Reported beneficial owners: 27
Minimum commitment: $0

Form ADV 2114409 · Sep 1, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

MAINLINE TU-K INDUSTRIES, LLCVenture Capital Fund · Last reported Sep 1, 2026$5.08MGross asset value

Form D fundraising filings

MainLine Tu-K Industries, LLC

Auditor CBIZ CPAS P.C. DEERFIELD, Illinois, United States

Custodian PRINCIPAL BANK MINNEAPOLIS, Minnesota, United States Related to adviser: No

Marketer 3ICO SECURITIES LLC WYNNEWOOD, Pennsylvania, United States Related to adviser: No

Provider details

Annual audit: Yes
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: No
External marketing: Yes

CBIZ CPAS P.C.
PCAOB 199

3ICO SECURITIES LLC
CRD 173648 · SEC 8-69544

Fund details & source

Fund ID: 805-1369997640
Reported beneficial owners: 10
Minimum commitment: $200K
Form D file number: 021-465957

Form ADV 2114409 · Sep 1, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

MAINLINE SO/UNEQUAL PARTNERS, L.P.Private Equity Fund · Last reported Sep 1, 2026$41.6KGross asset value

Custodian PRINCIPAL BANK MINNEAPOLIS, Minnesota, United States Related to adviser: No

Marketer GRANT WILLIAMS L.P. PHILADELPHIA, Pennsylvania, United States Related to adviser: Yes

Marketer M HOLDINGS SECURITIES, INC. PORTLAND, Oregon, United States Related to adviser: No

Provider details

Annual audit: No
Prime brokers: No
Custodians: Yes
Administrator other than the adviser: No
External marketing: Yes

GRANT WILLIAMS L.P.
CRD 45961

M HOLDINGS SECURITIES, INC.
CRD 43285 · SEC 801-57304

Fund details & source

Fund ID: 805-8133240760
Reported beneficial owners: 23
Minimum commitment: $100K
Form D file number: 021-1589874

Form ADV 2114409 · Sep 1, 2026 · Schedule D 7.B.(1)

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.

Services & filing details

Most recent filing: Sep 1, 2026. View historical filings

Reported services

Individual portfolio management · Pooled investment vehicle management

Compensation

Percentage of assets · Fixed · Performance-based

Principal office

308 E. LANCASTER AVENUE, SUITE 300
WYNNEWOOD, PA, 19096-2145, United States

CRD 159045

Filing source

Form ADV 2114409 · Sep 1, 2026 · Items 1 & 5

Official IAPD profile (latest public filing). Values are the most recently reported in our imported data; the public profile may show a newer filing.