What Is DTC, ACATS &
In-Kind Transfer?

Three building blocks of the US securities transfer system

Every time securities move between accounts in the United States, at least one of three systems is involved: DTC (Depository Trust Company), ACATS (Automated Customer Account Transfer Service), or an in-kind transfer process. These aren't competing alternatives — they're different layers of the same infrastructure. DTC is the vault. ACATS is the moving truck. In-kind transfer is the legal framework that determines whether moving your stock triggers taxes.

Understanding these three terms is not optional for any investor holding significant assets — particularly concentrated stock positions. The mechanism by which your shares move directly determines whether you face a tax bill, how long the transfer takes, and what structures become available to you afterward.

The vault where US securities live

The Depository Trust Company (DTC) is a central securities depository — essentially the master recordkeeper for nearly all securities in the United States. Founded in 1973 and registered with the SEC as a clearing agency, DTC currently holds approximately $87.1 trillion in securities across 1.4 million+ active issues from the US and 131+ countries.

When you 'own' 1,000 shares of Apple at Fidelity, those shares aren't physically at Fidelity. They're held electronically at DTC in 'street name' — registered under the broker's DTC participant account. Fidelity's internal records show you as the beneficial owner. A DTC transfer simply changes which participant account holds those shares — your Apple stock moves from Fidelity's DTC account to, say, Schwab's DTC account.

DTC has approximately 5,000–6,000 participants, including major broker-dealers and banks. Since May 28, 2024, DTC settles transactions on T+1 (one business day after the trade date) under SEC Rule 15c6-1.

The system that moves entire brokerage accounts

ACATS (Automated Customer Account Transfer Service) is the standardized system for transferring customer accounts between brokerage firms. It is governed by FINRA Rule 11870, which establishes mandatory timelines and procedures that all NSCC-member firms must follow.

The key facts: ACATS is always initiated by the receiving firm, not the delivering firm. The delivering firm must validate the transfer within 1 business day. Once validated, delivery must complete within 3 business days. Total timeline: 4–6 business days in most cases.

ACATS moves stocks, bonds, ETFs, options, mutual funds (with distribution agreements), and cash balances. It cannot move proprietary products, fractional shares, cryptocurrency, certain annuities, or limited partnership interests in retail accounts. Think of ACATS as the moving company for your entire brokerage household — it packs everything that can legally move and delivers it to your new broker.

Moving stock without selling — and why it matters for taxes

An in-kind transfer moves securities from one account or structure to another without converting them to cash. The shares themselves move — not the proceeds from selling them. This distinction is critical because under US tax law, a sale triggers capital gains recognition, but an in-kind transfer does not.

In-kind transfers occur in several contexts, each governed by a specific provision of the Internal Revenue Code. Brokerage-to-brokerage transfers (same owner) are non-events for tax purposes. Spousal transfers are non-taxable under §1041. Contributions to a partnership are non-taxable under §721(a). Contributions to a controlled corporation are non-taxable under §351.

For concentrated stock holders, the most powerful application is §721(a): contributing appreciated stock to a partnership in exchange for a partnership interest. The partnership receives the shares with a carryover basis (§723), the partner's basis in the partnership interest equals their basis in the contributed stock (§722), and the holding period tacks (§1223). No gain. No loss. No tax.

DTC, ACATS, and in-kind transfers working together

These three concepts aren't separate silos — they interact. When you initiate an ACATS transfer, the underlying securities move via DTC's book-entry system. When you contribute stock in-kind to a partnership, the mechanical delivery happens via DTC free delivery or DWAC. The legal framework (in-kind, §721(a)) determines the tax treatment. The delivery mechanism (DTC) handles the actual movement. ACATS coordinates multi-asset account moves.

In-kind contribution is the structural foundation

Unlike traditional wealth management approaches that require selling the stock you believe in just to generate cash, Embark's SPV structure uses §721(a) in-kind contributions as the entry mechanism. The investor contributes appreciated shares without selling. The SPV generates income on the position. The investor receives partnership distributions — all without triggering the capital gains event that makes selling concentrated stock so expensive.

The mechanical delivery uses standard DTC infrastructure — the same system that processes trillions in daily securities movement. The legal framework uses §721(a) — a provision of the IRC that has governed partnership contributions since 1954. The innovation is combining established transfer mechanics with a partnership structure designed specifically for concentrated stock holders.

Frequently Asked Questions

Is DTC the same as a brokerage?

No. DTC is a central securities depository — it holds securities on behalf of brokerages, banks, and other financial institutions. Your brokerage is a DTC participant, meaning it has an account at DTC where your securities are held in 'street name.' When you see shares in your brokerage account, DTC's books show those shares in your broker's participant account. DTC currently holds approximately $87.1 trillion in securities and has 5,000–6,000 participants. Think of DTC as the vault and your brokerage as the bank branch.

Do I need to know about DTC to transfer my brokerage account?

For a standard ACATS transfer, you don't need to interact with DTC directly — your brokerage handles the mechanics. However, if you're transferring individual positions (not an entire account), your brokerage may reference DTC delivery instructions. And if you're contributing stock to a partnership or SPV structure like Embark's, you'll see DTC participant numbers in the delivery instructions. Understanding what DTC is helps you verify that the transfer is using standard, regulated infrastructure.

Can I use ACATS to transfer stock into a partnership?

No. ACATS transfers assets between brokerage accounts held in the same customer's name. Contributing stock to a partnership changes the ownership structure — the partnership becomes the owner of the shares. This requires a DTC free delivery or DWAC transfer from your brokerage account to the partnership's custodian account, documented as a §721(a) contribution. The distinction matters: ACATS is a lateral move (your account at Broker A → your account at Broker B). An in-kind contribution is a structural move (your shares → partnership's shares, in exchange for a partnership interest).

Does an in-kind transfer reset my holding period?

No. Under IRC §1223, when you contribute property to a partnership under §721(a), the holding period of your partnership interest includes the holding period of the contributed property — provided the property was a capital asset or §1231 property in your hands. If you held your stock for three years before contributing it, your partnership interest carries a three-year holding period from day one. This preserves long-term capital gains treatment if and when you eventually dispose of the partnership interest.