# Cystein

> Cystein is an SEC-registered investment advisory firm, registered since 2017, reporting under $25 million in regulatory assets under management in its Form ADV filing dated March 30, 2026.

- CRD: 290365
- Filed as: CYSTEIN
- Legal name: Cystein Management LLC
- Registration: SEC-registered investment adviser (status as filed: Approved)
- Filing period: October 2026
- Form ADV filing dated: March 30, 2026
- SEC record (IAPD): https://adviserinfo.sec.gov/firm/summary/290365
- AdvisorCensus page: https://advisorcensus.com/firm/cystein-290365

## Quick answers

**How is Cystein compensated?**
On its Form ADV (Item 5.E, October 2026), Cystein reports these compensation arrangements: a percentage of assets under its management.

**How much does Cystein charge?**
Its Form ADV Part 2A brochure dated March 30, 2026 states: Asset-based fee: 0.45% of assets a year. Fees can differ by service and may be negotiable; the brochure is the complete statement.

**Is Cystein registered with the SEC or a state?**
Cystein is an SEC-registered investment advisory firm, registered since 2017. Status as filed: Approved. CRD 290365.

**How much does Cystein manage?**
Cystein reports $4,460,154 in regulatory assets under management in its Form ADV filing dated March 30, 2026 (100% discretionary).

**How have Cystein's assets and staff changed since 2021?**
In the Form ADV data for Cystein: Regulatory assets under management: $4,395,666 in the October 2021 data and $4,460,154 in the October 2026 data, up 1%. Total employees: 2 in October 2021 and 2 in October 2026. Assets under management move with markets as well as with clients coming and going.

**What types of clients does Cystein serve?**
By number of clients on Form ADV Item 5.D: individuals (other than high net worth individuals) (15); high net worth individuals (7).

**Which custodians does Cystein use?**
Cystein's most recent Form ADV filing (Schedule D, Section 5.K(3)) lists Interactive Brokers LLC as a custodian holding 10% or more of its separately managed account assets.

**Does Cystein 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/290365

**Does Cystein state an account minimum?**
Its Form ADV Part 2A brochure dated March 30, 2026 says: "We do not require minimum income, minimum asset levels or other similar preconditions, but we do reserve the right to decline services to any prospective client for any nondiscriminatory reason."

## From the Form ADV filing

### Compensation (Item 5.E)
- A percentage of assets under your management

### Fees and minimums (Form ADV Part 2A brochure dated March 30, 2026)

- Asset-based fee: 0.45% of assets a year

> Portfolio management services accounts are assessed an annualized asset-based fee of 0.45% (45 basis points) that is paid monthly, in arrears. Advisory fees are not negotiable.

- Account minimum: None

> We do not require minimum income, minimum asset levels or other similar preconditions, but we do reserve the right to decline services to any prospective client for any nondiscriminatory reason.

As stated in the firm's brochure. Fees can differ by service and may be negotiable.

### Custodians (Schedule D, Section 5.K(3))
- Interactive Brokers LLC

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.

### Regulatory assets under management (Item 5.F)
- Total: $4,460,154
- Discretionary: $4,460,154
- Non-discretionary: $0

### Clients (Item 5.D)

| Client type | Clients | Assets |
| --- | --- | --- |
| Individuals (other than high net worth individuals) | 15 | $1,772,425 |
| High net worth individuals | 7 | $2,687,729 |
| Banking or thrift institutions | 0 | $0 |
| Investment companies | 0 | $0 |
| Business development companies | 0 | $0 |
| Pooled investment vehicles (other than investment companies and business development companies) | 0 | $0 |
| Pension and profit sharing plans (but not the plan participants or government pension plans) | 0 | $0 |
| Charitable organizations | Not reported | $0 |
| State or municipal government entities (including government pension plans) | 0 | $0 |
| Other investment advisers | 0 | $0 |
| Insurance companies | 0 | $0 |
| Sovereign wealth funds and foreign official institutions | 0 | $0 |
| Corporations or other businesses not listed above | 0 | Not reported |
| Other | 0 | $0 |

### Advisory services (Item 5.G)
- Portfolio management for individuals and/or small businesses
- Portfolio management for businesses (other than small businesses) or institutional clients
- Educational seminars/workshops

### Firm details
- Registered since: 2017 (8 years)
- Employees: 2 total, 1 performing advisory functions
- Wrap fee program participation: No
- Disclosures (Item 11): Reports no disclosure items on Form ADV Item 11.

### Websites listed on Form ADV (Item 1.I)
- cysteinfunds.com

## Assets and staff over time

| Data period | Regulatory assets under management | Employees | Filing dated |
| --- | --- | --- | --- |
| October 2021 | $4,395,666 | 2 | March 30, 2021 |
| October 2022 | $5,396,245 | 2 | March 24, 2022 |
| October 2023 | $4,142,710 | 2 | March 23, 2023 |
| October 2024 | $4,680,752 | 2 | March 27, 2024 |
| October 2025 | $4,938,295 | 2 | March 31, 2025 |
| October 2026 | $4,460,154 | 2 | March 30, 2026 |

Regulatory assets under management: $4,395,666 in the October 2021 data and $4,460,154 in the October 2026 data, up 1%.
Total employees: 2 in October 2021 and 2 in October 2026.

## Source

Form ADV as filed, October 2026. Values appear as filed. Cite as: AdvisorCensus. Cystein (CRD 290365): Form ADV filing data as of October 2026.