AdvisorCensus / Financial advisors / Massachusetts / Boston / Castle Rock Advisors LLC
Castle Rock Advisors LLC
Filed as CASTLE ROCK ADVISORS LLC
Castle Rock Advisors LLC is an SEC-registered investment advisory firm in Boston, MA, registered since 2024, reporting $1 billion to $5 billion in regulatory assets under management in its Form ADV filing dated August 6, 2026.
Quick answers
From the filingHow is Castle Rock Advisors LLC compensated?
On its Form ADV (Item 5.E, October 2026), Castle Rock Advisors LLC reports these compensation arrangements: a percentage of assets under its management; other.
Where is Castle Rock Advisors LLC located?
Castle Rock Advisors LLC's principal office is in Boston, MA, according to its Form ADV; the July 2025 filing also lists 1 other office (Schedule D, Section 1.F).
Is Castle Rock Advisors LLC registered with the SEC or a state?
Castle Rock Advisors LLC is an SEC-registered investment advisory firm, registered since 2024. Status as filed: Approved. CRD 331429.
How much does Castle Rock Advisors LLC manage?
Castle Rock Advisors LLC reports $3,858,230,155 in regulatory assets under management in its Form ADV filing dated August 6, 2026 (27% discretionary).
How have Castle Rock Advisors LLC's assets and staff changed since 2024?
In the Form ADV data for Castle Rock Advisors LLC: Regulatory assets under management: $1,594,841,424 in the October 2025 data and $3,858,230,155 in the October 2026 data, up 142%. Total employees: 28 in October 2024 and 33 in October 2026. Assets under management move with markets as well as with clients coming and going.
What types of clients does Castle Rock Advisors LLC serve?
By number of clients on Form ADV Item 5.D: high net worth individuals (37); pooled investment vehicles (other than investment companies and business development companies) (6); charitable organizations (3).
Which custodians does Castle Rock Advisors LLC use?
Castle Rock Advisors LLC's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists Fidelity Brokerage Services LLC as a custodian holding 10% or more of its separately managed account assets.
Does Castle Rock Advisors LLC report any disciplinary disclosures?
Reports no disclosure items on Form ADV Item 11. The detail of any item is on the firm's SEC record: https://adviserinfo.sec.gov/firm/summary/331429
What changed in Castle Rock Advisors LLC's recent Form ADV filings?
In the September 2026 filing data: Regulatory assets under management went from $2,383,765,925 to $3,858,230,155 (+62%).
From the Form ADV filing
Every figure below is as the firm filed it with regulators, as of October 2026.
How the firm is compensated
Item 5.E- A percentage of assets under your management
- Other
Item 5.E lists how the firm is compensated for its advice; Items 5.B, 6.A, and 7.A show whether its people or related companies can also earn commissions. Percentage of assets, fixed, hourly, subscription, and performance-based fees come from clients (a performance-based fee depends on investment results); commissions come with a sale or a trade, often from the company behind the product. How fees, commissions, and other arrangements differ
Fees and minimums
Form ADV Part 2ASee the firm's brochure (dated August 6, 2026) for its fees and any account minimum, on the SEC's IAPD site.
Regulatory assets under management
Item 5.F$3,858,230,155 as of October 2026, filing dated August 6, 2026.
A measure of scale, not skill or returns. Discretionary means the firm decides trades; non-discretionary means clients approve each one. What assets under management means
Who the firm serves
Item 5.DA firm with no individual clients is an institutional manager even if it manages billions; the mix tells you whom the practice is built around.
Advisory services
Item 5.G- Financial planning services
- Portfolio management for individuals and/or small businesses
- Portfolio management for pooled investment vehicles (other than investment companies)
- Selection of other advisers (including private fund managers)
Registration and firm details
Items 1, 2, 5- Registration
- SEC-registered investment adviser. Status as filed: Approved.
- Registered since
- 2024 (2 years)
- Employees
- Total: 33. Performing investment advisory functions: 27.
- Wrap fee program participation
- No.
- Custodians (Schedule D, Section 5.K(3))
-
Custodians holding 10% or more of the firm's separately managed account assets, as filed on Form ADV (Schedule D, Section 5.K(3)). A custodian holds client assets; it does not endorse or supervise the firm. AdvisorCensus has no relationship with any custodian.
- Other offices (Schedule D, Section 1.F)
-
1 other office, as of the July 2025 filing
- States registered or notice-filed
-
2 states or jurisdictions
SEC-registered investment advisers are examined by the SEC. SEC, state, and exempt registration
Disclosures
Item 11None Reports no disclosure items on Form ADV Item 11. View on IAPD.
Item 11 asks about criminal, regulatory, and civil events involving the firm and its advisory personnel. The detail of each yes answer is on the IAPD record. Reading a firm's disclosures
Assets and staff over time
Items 5.A, 5.F| Data period | Assets under management | Employees | Filing dated |
|---|---|---|---|
| October 2026 | $3,858,230,155 | 33 | August 6, 2026 |
| October 2025 | $1,594,841,424 | 33 | June 4, 2025 |
| October 2024 | Not reported | 28 | July 17, 2024 |
Regulatory assets under management: $1,594,841,424 in the October 2025 data and $3,858,230,155 in the October 2026 data, up 142%.
Total employees: 28 in October 2024 and 33 in October 2026.
As filed in each year's data for the same month. Assets under management move with markets as well as with clients coming and going; they measure scale, not skill or returns. Most firms update these figures once a year.
Changes in the filing
Last 12 months- September 2026
- Regulatory assets under management went from $2,383,765,925 to $3,858,230,155 (+62%).
- April 2026
- Regulatory assets under management went from $1,594,841,424 to $2,383,765,925 (+49%).
- No longer lists an office in San Francisco, CA.
- Updated its list of owners and control persons (Schedule A).
Compared month to month from the SEC's monthly adviser data and the state compilation feed. Owners and control persons are summarized, never named.
Websites listed on Form ADV
Item 1.INot reported.
Source: Form ADV, as of October 2026. Values appear as filed; a value the firm did not report is shown as "Not reported."
Cite this page
AdvisorCensus. Castle Rock Advisors LLC (CRD 331429): Form ADV filing data as of October 2026. https://advisorcensus.com/firm/castle-rock-advisors-llc-boston-ma-331429