Private fund adviser · Denver, CO
Mainline West Fund Manager LLC
SEC-registered investment adviser · CRD 147532 · SEC 801-69444
At a glance
Mainline West Fund Manager LLC is an SEC-registered investment adviser based in Denver, Colorado, with $1.8 billion in regulatory assets under management as of its Form ADV filed March 14, 2026. Its largest client group by assets is pooled investment vehicles, and it reports 109 individual clients. By Form ADV it is a private fund adviser, ranked 1,769th of 4,686 private fund advisers and 3,890th of 17,210 SEC-registered advisers by assets.
Main office 720-536-3380mainlinewest.netAs filed on Form ADV
- Regulatory AUM
- $1.8B
- Rank among private fund advisers
- #1,769 of 4,686
- Rank among all SEC RIAs
- #3,890 of 17,210
- Rank in Colorado
- #52 of 359
- Individual clients
- 109
- High-net-worth clients
- 109
- Accounts
- 116
- Discretionary
- 100% of AUM
- Employees
- 5
- Advisory staff
- 4
- Offices
- 1
Owners and executives on its Form ADV
- Bradley J. KreidleOwner, President
- Michael C. MaciolekOwner, Senior Vice President
- Anthony S. CaselliOwner, Chief Financial Officer, Chief Compliance Officer
- Paul W. DannenhauerOwner, Senior Vice President
Custody and brokerage
2 custodians
- Wilmington Trust$1.0B91%
- Hilltop Securities$102M9%
Broker-dealer
Hybrid RIA
Mainline West Fund Manager LLC is a hybrid RIA: 4 of its employees are also registered representatives of a broker-dealer. It names an affiliated broker-dealer: Mainline West Municipal Securities LLC.
- Mainline West Municipal Securities LLC ↗CRD 148020
An introducing broker-dealer: its trades clear through another firm, which holds the brokerage accounts. Its annual audited report filed with the SEC, March 2026
Its Form ADV brochure (filed March 2026) names Mainline West Municipal Securities as the broker-dealer its advisers are registered with.
Dannenhauer is also a registered representative of MainLine West Municipal Securities, LLC, an affiliated broker -dealer.
Who it serves
| Client type | Clients | Regulatory AUM | Share |
|---|---|---|---|
| Pooled investment vehicles | 7 | $1.3B | 76% |
| High-net-worth individuals | 109 | $422M | 24% |
Private funds
Mainline West Fund Manager LLC reports 7 private funds with $1.3B in gross assets: other private funds (Form ADV Item 7.B).
Disciplinary disclosures
Mainline West Fund Manager LLC reports no disciplinary disclosures in Item 11 of Form ADV. Read the details on the SEC’s adviser search ↗
Services
- Portfolio management for individuals and small businesses
- Portfolio management for pooled investment vehicles
How it’s paid
- A percentage of assets under management
- Performance-based fees
Form ADV and brochures on the SEC’s adviser search ↗mainlinewest.net ↗
AtlasMembers
The full record on Mainline West Fund Manager LLC
Ten years of SEC filings, its owners and contacts, and how it stacks up against its peers. Atlas members see all of it.
- Assets, accounts, clients and staff, ten years of filings
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- Growth over one, three and five years
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- Rank against 1,896 peers of its type and size
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- Owners and executives, with titles and stakes
- 4 namedLocked
- Main office, fax and compliance officer
- Locked
- Filing changes this year, with alerts
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Free while Atlas launches: create a free account and confirm your email. Every figure comes from SEC filings.
Background
Questions
How much does Mainline West Fund Manager LLC manage?
Mainline West Fund Manager LLC reports $1.8 billion in regulatory assets under management across 116 accounts, 100% of it on a discretionary basis, on its Form ADV filed March 14, 2026.
What kind of firm is Mainline West Fund Manager LLC?
Mainline West Fund Manager LLC is a private fund adviser by its Form ADV answers. Private funds are at least half of its business by assets.
Who are Mainline West Fund Manager LLC’s clients?
By assets, its largest client types are pooled investment vehicles ($1.3 billion, 7 clients); high-net-worth individuals ($422 million, 109 clients).
Does Mainline West Fund Manager LLC manage private funds?
Yes. It reports 7 private funds with $1.3 billion in gross assets, including other private funds.
Does Mainline West Fund Manager LLC have any disciplinary history?
Mainline West Fund Manager LLC reports no disciplinary disclosures in Item 11 of its Form ADV. Check the SEC’s adviser search for the latest record.
Where these numbers come from
Every figure is Mainline West Fund Manager LLC’s own answer on its latest Form ADV, from the SEC’s registered-adviser list as of October 1, 2026: regulatory assets and accounts (Item 5.F), clients by type (5.D), employees (5.A and 5.B), compensation (5.E) and services (5.G). Custodians come from Schedule D 5.K(3) of its latest filing (2026-03-14), which lists those holding 10% or more of separately managed account assets and the amount at each. “Hybrid” means some employees are also registered representatives of a broker-dealer (Item 5.B(2)); affiliated broker-dealers are the related persons it lists in Item 7.A and Schedule D. Firm type comes from its own answers: broker-dealer firms are registered broker-dealers themselves (Item 6.A); private fund advisers manage mostly private funds (Item 7.B, 5.D); wealth managers manage at least half their assets for individuals (5.D). Ranks compare it by regulatory assets with every SEC-registered adviser and with firms of its type. Figures are as of the firm’s last annual update, so they can lag recent deals and market moves. Regulatory AUM counts assets the firm continuously supervises and can differ from what a firm markets.
Not an endorsement or a recommendation. Before hiring any adviser, read its Form ADV Part 2A brochure and check its record on the SEC’s adviser search. How to check a financial advisor →