Mainline Investment Advisers

Private Equity SEC-registered adviser

Legal name: Mainline Investment Advisers, LLC

Wynnewood, PA Website

AUM

$109.9M
Regulatory AUM

Private funds

8
Private Equity 6 · Real Estate 1 · Venture Capital 1

Private fund assets

$107.9M
Gross asset value

Employees

4

Last Form D raise

Apr 2018
Most recent fund filing

From SEC Form ADV filing (filed Sep 1, 2026). View on SEC

People(2)

Owners and executive officers named on the firm's SEC Form ADV.

D
David Clapper
Vice President, Secretary, Chief Operations Officer
Source: SEC Form ADV
W
William Landman
President, Chief Executive Officer
Source: SEC Form ADV

Funds(6)

Private funds reported on Form ADV, with amounts raised from the funds' SEC Form D filings.

FundTypeGross assetsRaised (Form D)InvestorsLast Form DRecency
Mlip Mlh Investments, LLCPrivate Equity$17.8M$10.3M2Apr 2018Cold
Mlh Holdings, LLCPrivate Equity$55.8M———
Mainline Cala Del Sol Partners, L.P.Real Estate$5.7M———
Mainline Tu-K Industries, LLCVenture Capital$5.1M———
Mainline So/Unequal Partners, L.P.Private Equity$42K———
Mainline Special Opportunities Fund, L.P.Private Equity$1K———

Board seats

Companies whose SEC Form D filings name one of this firm's people as a director, matched by name and office ZIP code.

No board seats matched from SEC filings yet.

Regulatory identifiers

CRD number
159045
SEC file number
801-72761

Sources