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CASTLEARK MANAGEMENT LLC
CRD 109587File 801-56239
APPROVED
Retail clients
Filing as of Apr 1, 2026
Feed vintage Oct 1, 2026
Regulatory AUM
$4.59B
Top 25% of cohort (national)
Discretionary AUM
$4.59B
Clients
66
66 accounts
Employees
28
Top 25% of cohort in IL
Identity & registration
ADV Item 1- Organization form
- Limited Liability Company
- Firm type
- Registered
- SEC region
- CHRO
- Registration date
- Feb 4, 1999
- Principal office
- 1 N. WACKER DRIVE, SUITE 3950, CHICAGO, IL, 60606
- Phone
- 312-456-9682
- Website
- HTTP://WWW.CASTLEARK.COM
Assets & accounts
ADV Item 5F- Total regulatory AUM
- $4.59B
- Discretionary AUM
- $4.59B
- Non-discretionary AUM
- $0
- Discretionary accounts
- 66
- Non-discretionary accounts
- 0
- Total accounts
- 66
- AUM per client
- $69.5M
Clients by type
ADV Item 5D| Client type | Clients | AUM |
|---|---|---|
| Investment companies | 1 | $311.7M |
| High net worth individuals | 46 | $76.8M |
| Pooled investment vehicles | 5 | $362.4M |
| Pension and profit sharing plans | Fewer than 5 | $1.14B |
| State or municipal government entities | 11 | $2.70B |
Compensation & activities
ADV Items 5E, 5GCompensation
- A percentage of assets under your management
Advisory activities
- Portfolio management for businesses
- Portfolio management for investment companies
- Portfolio management for pooled investment vehicles
- Portfolio management for individuals and/or small businesses
Custody
ADV Item 9- Firm Custody Cash
- No
- Firm Custody Assets
- No
- Firm Custody Clients
- No
- Firm Custody Securities
- No
- Related Person Custody Cash
- No
- Related Person Custody Assets
- No
- Related Person Custody Clients
- No
- Related Person Custody Securities
- No
Disclosure events
ADV Item 11This firm answered no to every Item 11 disclosure question in this filing.
Filed changes
| Date | Field | From | To | Change |
|---|---|---|---|---|
| May 1, 2026 | Clients | 61 | 66 | increased by5 |
| May 1, 2026 | AUM | $3,970,780,800 | $4,585,548,400 | increased by$614,767,600 |
| May 1, 2026 | Accounts | 61 | 66 | increased by5 |
| Dec 1, 2025 vs May 1, 2025 | Clients | 57 | 61 | increased by4 |
| Dec 1, 2025 vs May 1, 2025 | AUM | $3,681,269,800 | $3,970,780,800 | increased by$289,511,000 |
| Dec 1, 2025 vs May 1, 2025 | Accounts | 56 | 61 | increased by5 |
| May 1, 2025 vs Oct 1, 2022 | Employees | 34 | 28 | decreased by6 |
| May 1, 2025 vs Oct 1, 2022 | Clients | 35 | 57 | increased by22 |
| May 1, 2025 vs Oct 1, 2022 | AUM | $3,666,123,000 | $3,681,269,800 | increased by$15,146,800 |
| May 1, 2025 vs Oct 1, 2022 | Accounts | 34 | 56 | increased by22 |
| May 1, 2022 | AUM | $3,516,222,000 | $3,666,123,000 | increased by$149,901,000 |
| Apr 1, 2022 | Employees | 30 | 34 | increased by4 |
| Apr 1, 2022 | Clients | 40 | 35 | decreased by5 |
| Apr 1, 2022 | AUM | $3,456,502,200 | $3,516,222,000 | increased by$59,719,800 |
| Apr 1, 2022 | Accounts | 40 | 34 | decreased by6 |
On Form 5500, an adviser usually appears as a plan service provider (Schedule C), not the plan sponsor.
See plans that list “CASTLEARK MANAGEMENT” as a service provider on 5500mcp →Matched by name only — Form ADV and Form 5500 share no identifier, and names are searched loosely (“CASTLEARK MANAGEMENT” may also match similarly-named firms). Confirm identity against each filing.
Every value above is reproduced from this firm's Form ADV filing. Fields the firm left blank are shown as “Not reported” rather than filled in from other sources.