Rockingstone Advisors provides portfolio management for individuals and small businesses, portfolio management for institutions, and selecting other managers.
Rockingstone Advisors reports 61 clients. They include 54 high-net-worth individuals and 7 individual clients. Of its assets, 100.0% ($280M across 283 accounts) are managed with discretion.
| Client type | Clients | Assets |
|---|---|---|
| Individuals (other than HNW) | 11% | <1% |
| High-net-worth individuals | 89% | 99% |
Client breakdown and activity details
| Client type | Clients | Regulatory AUM | AUM share | Avg. per client |
|---|---|---|---|---|
| Individuals (other than HNW) | 7 | $2.09M | 0.7% | $298K |
| High-net-worth individuals | 54 | $278M | 99.3% | $5.15M |
| Total | 61 | $280M | 100% | $4.59M |
- Clients
- 7
- Regulatory AUM
- $2.09M
- AUM share
- 0.7%
- Avg. per client
- $298K
- Clients
- 54
- Regulatory AUM
- $278M
- AUM share
- 99.3%
- Avg. per client
- $5.15M
Total
- Clients
- 61
- Regulatory AUM
- $280M
- AUM share
- 100%
- Avg. per client
- $4.59M
- Clients outside the U.S.
- 0%
- Clients advised without assets under management last fiscal year
- 0
- Private funds advised
- 0
Rockingstone Advisors charges 0.85%–1.75% a year for its Investment management fee. The fee is billed in arrears and is negotiable. The brochure also prices one other service, listed under fee details.
Fee details and sources
Other fees
- Digital asset advisory fee
- An annual flat fee of 1.00% of digital assets in the digital asset account, calculated daily and assessed monthly in arrears.
Brandt Sakakeeny owns 50% to 75% of Rockingstone Advisors. The leadership team of Rockingstone Advisors includes Chief Investment Officer Eric Katzman and Chief Compliance Officer Brandt Sakakeeny. It has 3 employees, 2 of them in advisory roles.
Leadership
- Brandt SakakeenyChief Compliance Officer
- Eric KatzmanPartner and Co-Chief Investment Officer
- Margaret SakakeenyMember
Investment adviser representatives
2 representatives listed in the SEC register as of 9 October 2026.
- Eric Richard Katzman
- Brandt Augustus Sakakeeny
Staff
- 3 employees
- 2 in advisory functions
- 2 state-registered reps
- Owns 50% to 75% of Rockingstone Advisors LLC
Brandt Sakakeeny
Control person · since January 2009
- Owns 25% to 50% of Rockingstone Advisors LLC
Margaret Sakakeeny
since January 2009
Rockingstone Advisors’ regulatory assets grew from $199M (January 2021) to $280M (March 2026); clients rose from 51 to 61 and employees from 2 to 3.
Figures from each annual filing
| Filed | Regulatory AUM | Clients | Employees | Offices |
|---|---|---|---|---|
| March 2026 | $280M | 61 | 3 | 3 |
| February 2025 | $286M | 63 | 2 | 3 |
| March 2024 | $271M | 62 | 2 | 3 |
| February 2023 | $270M | 59 | 2 | 3 |
| February 2022 | $306M | 59 | 2 | 2 |
| January 2021 | $199M | 51 | 2 | 2 |
Besides its headquarters, Rockingstone Advisors has 2 offices, with 3 listed addresses in Florida, Massachusetts and New York.
Florida · 1 listed address
- 550 Se 6th Avenue, Delray Beach
Massachusetts · 1 listed address
- 292 Main Street, Suite 32, Great BarringtonHQ
New York · 1 listed address
- 600 Mamaroneck Ave., Harrison
Contact and registration details
- Legal name
- Rockingstone Advisors LLC
- Headquarters
- 292 Main Street, Suite 32, Great Barrington, MA 01230
- Website
- rockingstoneadvisors.com
- Phone
- 212-430-2240
- @384524
- SEC file
- 801-77696
- Founded
- 2009
- Structure
- Delaware LLC
- Fiscal year end
- December
Rockingstone Advisors uses Charles Schwab ($127M, 57%) and Fidelity ($94.2M, 43%) as custodians for its separately managed accounts. Rockingstone Advisors does not have custody of client assets.
- Charles SchwabCharles Schwab & Co., Inc. · San Francisco, CA · $127M57%
- FidelityFidelity Brokerage Services LLC · Boston, MA · $94.2M43%
At year end, Rockingstone Advisors’ separately managed accounts were mostly in stocks (78%). Its reported 13F holdings for the quarter ended 30 June 2026 total $249M across 115 positions; the largest are J P Morgan Exchange Traded F (4.6%), Tower Semiconductor Ltd (3.4%) and Select Sector SPDR TR (2.8%).
What the accounts hold
- Stocks78%
- Exchange-traded equities74%
- Non-exchange-traded equities4%
- Funds9%
- Bonds9%
- Investment grade corporate bonds5%
- Sovereign bonds3%
- U.S. government and agency bonds1%
- Cash4%
- Other1%
- Commodities, digital assets1%
Reported 13F holdings
- $249M
- Reported 13F value
- 115
- Positions
- 28.9%
- In the 10 largest
- +14.3%
- Value vs. prior quarter
- J P Morgan Exchange Traded F · Ultra Shrt ETF4.6%
- Tower Semiconductor Ltd · Shs New3.4%
- Select Sector SPDR TR · ST Str Techn ETF2.8%
- Alphabet Inc. · Cap Stk CL A2.8%
- iShares TR · Russell 2000 ETF2.7%
- Nvidia Corporation2.7%
- Vanguard Scottsdale Fds · Short Term Treas2.6%
- Vanguard Index Fds · Total Stk Mkt2.5%
- Crowdstrike Hldgs Inc. · CL A2.5%
- Apple Inc.2.3%
Together, the ten largest are 28.9% of reported value.
How many clients does Rockingstone Advisors have?
Rockingstone Advisors has 61 clients and manages $280 million for them, as of March 2026. They include 54 high-net-worth individuals and 7 individual clients.
Source: Form ADV Part 1A, Items 5.D and 5.F, filed 19 March 2026
What services does Rockingstone Advisors offer?
Rockingstone Advisors provides portfolio management for individuals and small businesses, portfolio management for institutions, and selecting other managers.
Source: Form ADV Part 1A, Item 5.G, from the SEC's 2 October 2026 data file
How much does Rockingstone Advisors charge?
Rockingstone Advisors charges 0.85%–1.75% a year for its Investment management fee. The fee is billed in arrears and is negotiable.
Source: ROCKINGSTONE ADVISORS ADV PART 2A DATED 2026.03.20, filed 19 March 2026
Which custodians does Rockingstone Advisors use?
Rockingstone Advisors’ separately managed account assets are held at Charles Schwab & Co., Inc. (San Francisco, CA), with $127M and Fidelity Brokerage Services LLC (Boston, MA), with $94.2M. Only custodians holding at least a tenth of those assets are named.
Source: Form ADV Part 1A, Schedule D, Section 5.K.(3), filed 19 March 2026
How many financial advisors does Rockingstone Advisors have?
Rockingstone Advisors has 2 investment adviser representatives registered with state securities authorities, out of 3 employees, and 2 perform investment advisory functions. None are registered representatives of a broker-dealer or licensed insurance agents.
Source: Form ADV Part 1A, Items 5.A and 5.B, from the SEC's 2 October 2026 data file
What does Rockingstone Advisors invest in?
At the end of its last fiscal year, Rockingstone Advisors’ separately managed accounts held 74% exchange-traded equities, 9% pooled vehicles (private funds and similar), 5% investment grade corporate bonds, 4% non-exchange-traded equities, 4% cash and equivalents, 3% sovereign bonds, 1% U.S. government and agency bonds and 1% other. The 1% other category is described as: Commodities, Digital Assets.
Source: Form ADV Part 1A, Items 5.K.(1) and 7.B, from the SEC's 2 October 2026 data file
Who owns Rockingstone Advisors?
Rockingstone Advisors’ direct owners are Brandt Sakakeeny (50% to 75%) and Margaret Sakakeeny (25% to 50%).
Source: Form ADV Part 1A, Schedules A and B, filed 19 March 2026
How does Rockingstone Advisors get paid?
Rockingstone Advisors is paid through a percentage of assets under management. Its Form ADV lists no commissions or performance-based fees among how it is paid.
Source: Form ADV Part 1A, Item 5.E, from the SEC's 2 October 2026 data file
How do I contact Rockingstone Advisors?
Rockingstone Advisors’ main office is at 292 Main Street, Suite 32, Great Barrington, MA 01230. Its phone number is 212-430-2240. Its website is rockingstoneadvisors.com.