One Code, Three Accounts: The Blind Spots Behind an Omnibus Account
Electronic Transaction Clearing, a Los Angeles clearing firm, opened omnibus accounts at a Canadian broker-dealer for some of its customers. It never told the Canadian firm which accounts belonged to customers and which didn't. So the Canadian firm treated all of them as PAIB accounts, the proprietary accounts of broker-dealers, and FINRA found the failure affected ETC's net capital and reserve computations. On two dates FINRA examined in 2013, ETC's reserve computations for that account left hindsight deficiencies of about $7.9 million and $18.7 million. In 2015, at a new omnibus carrying firm, ETC's daily segregation instructions misstated what to lock up, and that firm delivered out customer securities that should have stayed put. FINRA censured ETC and fined it $250,000 in July 2017, a settlement ETC accepted without admitting or denying the findings.
The pattern still turns up. In May 2026, FINRA fined Pictet Overseas $610,000 for anti-money laundering failures and other violations. An omnibus account held by Pictet's foreign affiliate made up more than 70% of the firm's low-priced securities trades, and some of the customers behind it were themselves foreign financial institutions in secrecy jurisdictions. Pictet's procedures said the due diligence rules for those institutions didn't apply, because the firm "does not have, nor does it intend to open accounts for such" institutions.
In both cases, the label on the account decided how it was treated. The rules follow the relationship behind the account, and nobody checked one against the other. On an executing broker's desk, the same mistake shows up in three places: who sends the confirmation, where Regulation T applies, and whether the prime brokerage paperwork exists.
Three Arrangements Share One Label
"Omnibus" usually means one thing: a single account that holds trades for many people the desk doesn't see. Three different arrangements fit that description, and the rules treat them differently.
Omnibus Clearing
A broker-dealer carries its own customers' activity through one account at another firm. FINRA Rule 4311 covers these agreements, whether accounts are carried "on an omnibus or fully disclosed basis," and the agreement needs FINRA's approval. The broker-dealer behind the account keeps its customers' records.
Omnibus Credit Under Regulation T
Regulation T lets a creditor "effect and finance transactions" for a registered broker-dealer that gives it written notice that all securities in the account are for the account of its customers, and that any short sales are made for those customers, not for its partners (12 CFR 220.7(f)). The industry still calls it a special omnibus account. SIFMA's form for it, SIA Form 119, cites section 220.10, its old home, which today covers securities lending. Under the form, trades the broker-dealer makes for its own account go in a separate account, and in the omnibus account the carrying firm acts as broker for the broker-dealer "and not for any other person."
Prime Brokerage
Prime brokerage is a different relationship, though desks sometimes book it like an omnibus account. The executing broker trades for a customer and gives the trade up to the customer's prime broker. Under the SEC staff's January 1994 prime brokerage letter, the two brokers can treat the customer's account as a broker-dealer credit account, but only while the letter's conditions are met. The SIA-150 and the F1SA are how the industry shows they are.
Who Owes the Confirmation
SEC Rule 10b-10 requires a broker-dealer to send a written confirmation to its customer at or before completion of each transaction. Paragraph (d)(1) says "customer" doesn't include a broker or dealer. So when you trade with another broker-dealer's omnibus account, you don't owe that broker-dealer a 10b-10 confirmation. Comparison and settlement duties still apply, and the broker-dealer that holds the account still owes confirmations to its own customers.
That exclusion is where desks overreach. It covers brokers and dealers, and only them. An investment adviser's block account isn't a broker-dealer account, however many client accounts it gets allocated to. Neither is a fund's, or a bank trust department's. If one of those is coded omnibus, the exclusion doesn't apply, and you still owe a 10b-10 confirmation on each trade allocated from it.
On a give-up, the prime broker that settles the trade is a broker-dealer, so the trade can look broker-to-broker on the blotter. But the 1994 letter keeps the confirmation with the executing broker: it confirms each trade to the customer directly, or in care of the prime broker if the customer gave a separate written instruction. A desk that books give-ups as trades with the prime broker can skip confirmations the letter requires.
Carrying agreements don't settle this for you either. FINRA Rule 4311(c)(1) makes an agreement allocate "preparation and transmission of confirmations," but that paragraph applies to agreements where accounts are carried on a fully disclosed basis. In an omnibus arrangement, the carrying firm's customer is the broker-dealer, so confirmations to the people behind the account fall to that broker-dealer. If your plan says "the clearing firm handles confirmations" for an omnibus account, check what the agreement says before an examiner does.
Where Regulation T Sits
Omnibus credit depends on that written notice. The broker-dealer that gives it is a creditor under Regulation T in its own right, so margin and cash-account rules for its customers run on its books. The carrying firm extends credit to the broker-dealer, not to the customers behind it. Without the notice, the omnibus credit provision doesn't apply to the account.
Regulation T also lets a creditor buy from or sell to "another creditor or person regulated by a foreign securities authority" under a good faith agreement to deliver promptly against full payment (220.7(b)). That's the broker-to-broker trade. It doesn't reach an institutional customer that settles delivery versus payment through its custodian at another broker-dealer, unless that customer is itself a broker-dealer or a foreign regulated firm. That customer's account with you is a cash account, and 220.8 applies. When you deliver the purchased security to the other broker-dealer before the customer has paid, the 90-day freeze applies unless an exception does. The one built for DVP covers a security delivered for deposit in a cash account that holds enough funds to pay for it. You can rely on the receiving broker-dealer's written statement that the funds are there, accepted in good faith (220.8(c)(2)(ii)). That statement is the Letter of Free Funds.
Code that customer's account omnibus, and the letter request may never go out. The trade looks broker-to-broker because a broker-dealer is on the other side, and the letter Regulation T expects is missing from the file.
Classify First, Then Pick the Paperwork
The reverse mistake is sending a LOFF because an omnibus account has no F1SA. If the account really is another broker-dealer's omnibus account, the trade is broker-to-broker, and a letter would treat it as a customer cash-account trade. The question to answer first is what the account is.
| What the account really is | What proves it | Who confirms to the customer | LOFF on DVP trades? |
|---|---|---|---|
| Another broker-dealer's omnibus account | The written notice under 220.7(f) and the clearing agreement | That broker-dealer, to its own customers | No; the trade is broker-to-broker |
| A prime brokerage customer | A current SIA-150 between the prime broker and you, and an F1SA for the account | You, directly or in care of the prime broker on the customer's written instruction | Not while the 1994 letter's conditions are met |
| An institutional customer settling DVP at another broker-dealer | Your customer cash account and its settlement instructions | You | Yes, to avoid the 90-day freeze |
The first column describes the relationship, and somebody at your firm has to decide it, account by account, from the documents.
Where PBIN and FVD Fit
Prime Broker Integrated Network (PBIN) keeps the SIA-150 and F1SAs for each relationship in one place, so the middle row of the table has a record you can produce. Freefunds Verified Direct (FVD) sends Letters of Free Funds, tracks each response, and keeps a time-stamped record of every request. The two are connected: once an F1SA is on file in PBIN for an account, FVD adds an exception for that account number and stops sending LOF requests for it.
Neither product decides whether an account is omnibus. That call is yours, on the account record. Once it's made, they keep the record of which accounts have prime brokerage paper and which trades have a letter behind them.
What to Check This Month
- Pull every account coded omnibus. For each one, find the holder's broker-dealer registration and the written notice or clearing agreement behind the code.
- Look for proprietary trades in those accounts. The SIA form puts them in a separate account, margined as the carrying firm requires.
- Find omnibus-coded accounts held by investment advisers, funds, or banks. Those holders aren't broker-dealers, so work out who confirms each trade allocated from them.
- Sample give-ups booked as broker-to-broker, and confirm that a 10b-10 confirmation reached each customer.
- Compare your LOFF traffic with your omnibus list. An account on both lists is being treated two ways at once.
If you'd like to compare your account coding with your PBIN and FVD records, contact Loffa Interactive Group.
This post is for informational purposes only and does not constitute legal advice. For guidance on specific regulatory obligations, consult your counsel or compliance advisor.
Related reading: 2,500 LOFFs a Month: What a Missing F1SA Costs the Executing Broker, Moving to Self-Clearing: The Regulatory Work Your Clearing Firm Used to Do, and Managing SIA-150, SIA-151, and F1SA Documentation.