No commissions, no ads, no advice. This Oppenheimer profile draws only on public records, each linked so you can confirm it yourself.

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1. Check the SEC adviser record. Open the SEC's IAPD record for Oppenheimer (CRD #249) and confirm its registration.

2. Read the filings. Review the Form ADV / Form CRS and any disclosure section linked from the IAPD page.

3. Confirm the entity. Match CRD #249 / Oppenheimer so you're reading the right firm.

The short answer: is Oppenheimer a fiduciary?

Yes. Oppenheimer is a fiduciary when it acts as your investment adviser. It files with the SEC as Oppenheimer (CRD #249). According to its latest Form ADV (filed September 30, 2026), the firm reported $36.7 billion in regulatory assets under management (a firm-reported figure). Its Form ADV (Item 5.E) lists how it is paid: a percentage of assets under management, fixed fees, and commissions. Each of those lines traces back to a public filing you can open in a few minutes.

Its Form ADV also reports that the firm itself is registered as a broker-dealer, and brokerage accounts fall under Regulation Best Interest instead. Ask which capacity covers each of your accounts. The firm must tell you.

Our view: that dual registration is the most useful fact on this page. Before you compare Oppenheimer's costs with any other firm's, get it to name, in writing, which of your accounts are advisory and which are brokerage, because the standard of care and the way you pay can differ between them.

What "fiduciary" means: a fiduciary is legally bound to place a client's interests above its own. (More on fiduciary duty)

Oppenheimer at a glance

✅ Verified from public filings, last checked October 5, 2026. Oppenheimer (SEC CRD #249) is a fiduciary when acting as your adviser, on a fee-based basis, with $36.7 billion in regulatory assets under management. Every figure below links to its primary source.

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Oppenheimer fees: what you'll pay

Oppenheimer is fee-based, not fee-only. Alongside advisory fees, its Form ADV (Item 5.E) reports commissions among its compensation. For a client, that means cost can arrive from three directions at once: the advisory fee on managed assets, commissions on products bought through the broker-dealer side, and the fund expense ratios underneath.

Fee-based here means the firm can be paid through any of the channels Item 5.E names: a percentage of assets, fixed fees, and commissions. A fee-only financial advisor is paid by clients alone. Because Oppenheimer runs both an advisory and a brokerage business, the same holding can carry a different cost depending on which kind of account it sits in. Whether the total is fair depends on what you get for it, not just the headline rate (Are you paying too much? Why that might be the wrong question).

Who owns Oppenheimer, and what conflicts does it disclose?

Schedule A of Oppenheimer's Form ADV names Viner Finance Inc. as its owner. (Form ADV Schedule A)

Its Form ADV Part 2A describes the firm's conflicts of interest, including how it and its advisers are paid. Read the two documents together: with a parent company above the adviser, Part 2A is the place to look for any arrangements with affiliates.

Oppenheimer SEC record: disclosures

Oppenheimer's Form ADV answers Yes to one or more disciplinary-history questions. For complaints, the firm's own regulatory filings are the place to start. A disclosure can be a regulatory, civil or criminal matter involving the firm or a related person. Read each item in context on IAPD before drawing conclusions. Any Oppenheimer disclosures sit on the public record, not on anyone's characterization of them.

On the record, it has been registered with the SEC since February 9, 1955, makes notice filings in 53 jurisdictions, and reports 2,806 employees, 1,219 of them (about 43%) in investment advisory roles. Fewer than half the staff sit on the advisory side, which is consistent with a firm that also runs a broker-dealer. Seven decades of registration settle the "is Oppenheimer legit?" search. The disciplinary answers on that same filing are what deserve your reading time.

Reading Oppenheimer reviews against the public record

Star ratings and client comments describe what working with a firm felt like. They usually don't show what the firm reports to regulators. For Oppenheimer, three filed facts matter before any review does. First, pay: it reports both advisory fees and commissions, so it is fee-based. Second, ownership: Viner Finance Inc. sits above it, and Part 2A carries the conflicts. Third, history: its Form ADV answers Yes on disciplinary questions. A five-star review can't tell you which of those apply to your account.

How to verify Oppenheimer yourself

To confirm it firsthand, take three steps:

1. SEC adviser record (IAPD): https://adviserinfo.sec.gov/firm/summary/249.

2. Form ADV / CRS: linked from the IAPD page.

3. Confirm the entity: match Oppenheimer (CRD #249) so you're reading the right firm.

What Oppenheimer does and who it serves

On its Form ADV, Oppenheimer reports providing financial planning, portfolio management for individuals, small businesses and institutions, pension consulting, and selection of other advisers.

It reports providing financial planning to about 5,500 clients in its last fiscal year (Form ADV Item 5.H), a count the form keeps separate from the client totals below.

Its Form ADV (Item 5.D) breaks its clients down by type, 39,036 in all:

By our arithmetic from Item 5.D, individuals are about 92% of Oppenheimer's clients but hold about 46% of its assets. High-net-worth individuals are roughly 3% of clients and about 16% of assets. The "Other" line, 1,214 clients with $11.10 billion (about 30% of assets), is a large block this summary doesn't break down, so ask the firm what it covers.

Separately, Item 5.F reports 39,036 client accounts, 20,471 discretionary (the firm can trade without seeking your approval first) and 18,565 non-discretionary, so about 52% are discretionary. The account total in Item 5.F matches the client total in Item 5.D exactly. We reproduce both as filed; because one client can hold several accounts, ask the firm if the match matters to you. Its main office is in New York, NY.

It reports that it or a related person has custody of certain client assets, which brings extra safeguards such as surprise examinations. The specifics are in its Form ADV. One habit follows from that: compare the statement you get from the custodian with any performance report from your adviser. When custody sits with the firm or an affiliate, that cross-check falls to you.

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Confirming the firm is the easy part. Seeing everything you hold is the valuable one.

Pulling up CRD #249 takes a few minutes. It won't show how your Oppenheimer accounts sit beside a held-away retirement plan, a spouse's portfolio or the costs inside each fund, because those usually live at other firms and arrive scattered and unreconciled. This is where Truthifi comes in.

How Truthifi can help

Truthifi links your accounts read-only and shows what you own, how it's allocated, how it's performing and where the risk sits, including single-stock exposure, returns next to a benchmark, a fee breakdown of the fees on each account, by type, and your Truthifi Score. Per Truthifi platform data, it connects with more than 18,000 financial institutions. You can share the accounts you choose with your advisor at Oppenheimer.

Prefer your own AI? A paid Truthifi plan lets you connect an AI assistant that supports MCP sign-in, such as Claude. (MCP, the Model Context Protocol, is an open standard that lets an assistant read only the data you authorize.) Truthifi Connect is the lighter membership for people who only want to use their own assistant. To ask about your fees, you need a plan that includes fee data: Monitoring or Monitoring Plus+. The pricing page lists each plan's current price and limits. See also How to ask AI about your real investment accounts.

Ask AI about your Oppenheimer accounts

Once your accounts are connected read-only, you can ask in plain English:

• "What do I own across my Oppenheimer accounts and everything else, and how is it allocated?"

• "What am I paying in fees across all of these accounts?"

Try it with Truthifi: start for free at app.truthifi.com and run a Monitoring Checkup (limits apply).

No commissions, no ads, no advice: Truthifi is not an investment adviser and doesn't give investment, tax or legal advice. Its access to your bank and brokerage accounts is read-only. Start free (limits apply). Monitoring Checkup is free. Link up to 10 connections. Plans and limits are on the pricing page → truthifi.com.

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FAQ

Is Oppenheimer a fiduciary? Yes, when acting as your adviser. Its Form ADV reports that it is also a broker-dealer, and brokerage accounts fall under Regulation Best Interest instead. Ask which capacity covers each of your accounts.

Is Oppenheimer fee-only? No, it's fee-based. Its Form ADV (Item 5.E) reports commissions among its compensation, alongside advisory fees. The fee schedule and conflicts are in its Form ADV Part 2A.

Who owns Oppenheimer? Oppenheimer is owned by Viner Finance Inc., as listed in Schedule A of its Form ADV.

Does Oppenheimer have complaints or disclosures? Yes. Its Form ADV answers Yes to one or more disciplinary-history questions. Read each item on IAPD, in context. A disclosure is not by itself proof of current wrongdoing.

Is Oppenheimer legit? Oppenheimer is registered with the SEC (CRD #249) and its filings are public on the SEC's IAPD site, which confirms it is a real, regulated firm. Registration doesn't tell you whether it's the right fit or what you'll pay, so read the fee and conflict sections of its Form ADV.

Can AI help me check whether I'm getting good value? Yes. Start free (limits apply): Monitoring Checkup is free and lets you link up to 10 connections. You can also connect an AI assistant you already use (such as Claude). On Monitoring or Monitoring Plus+ you can ask it, in plain English, about the fees on each of your accounts. Truthifi is not an investment adviser and doesn't give investment, tax or legal advice.

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About this profile

Truthifi built this profile from the firm's own SEC filings (Form ADV and, where filed, Form CRS). Every page is reviewed by the Truthifi Team before publishing. The Truthifi advisor fact packs are an ongoing series checking U.S. investment advisers against their public filings, one firm at a time.

Read next from the Truthifi blog

• What is a fiduciary?

• Fee-only financial advisor: costs and how to find one

• Are you paying too much? Why that might be the wrong question

• How to ask AI about your real investment accounts

• Robo-advisor vs. human financial advisor: which is better?

• All advisor fact packs on Truthifi

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A note on sources. The facts on this page come from publicly available documents, Oppenheimer's SEC and FINRA filings, each linked inline so you can verify it yourself (SEC data current as of October 5, 2026). This is general information, not financial or legal advice, and Truthifi is not affiliated with Oppenheimer. Regulatory records change, so always confirm against the official sources linked above. Spot something that should be corrected? Email us at support@truthifi.com.