# EDGAR Filing Document

**Accession Number:** 0000068136
**File Stem:** 0000950123-25-008527
**Filing Date:** 2025-8
**Character Count:** 67868
**Document Hash:** 4c802f2c83f6984fd106d0f421d932fc
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950123-25-008527.hdr.sgml**: 20250819

**ACCESSION NUMBER**: 0000950123-25-008527

**CONFORMED SUBMISSION TYPE**: ATS-N/UA

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250818

**DATE AS OF CHANGE**: 20250819

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MORGAN STANLEY & CO. LLC
- **CENTRAL INDEX KEY:** 0000068136

**ORGANIZATION NAME:**
- **EIN:** 132655998
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** ATS-N/UA
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 013-00139
- **FILM NUMBER:** 251230026

**BUSINESS ADDRESS:**
- **STREET 1:** 1585 BROADWAY
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10036-8293
- **BUSINESS PHONE:** 667-312-4062

**MAIL ADDRESS:**
- **STREET 1:** 1300 THAMES STREET
- **STREET 2:** C/O SHARED SERVICES COMPLIANCE - REGISTR
- **CITY:** BALTIMORE
- **STATE:** MD
- **ZIP:** 21231

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MORGAN STANLEY & CO. INCORPORATED
- **DATE OF NAME CHANGE:** 20110622

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MORGAN STANLEY & CO. LLC
- **DATE OF NAME CHANGE:** 20110621

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MORGAN STANLEY & CO. INCORPORATED
- **DATE OF NAME CHANGE:** 20110603

### Attached PDF Documents

**Attachment 1:** `50416_ATS-6_EX3.pdf`

_No text found in this document._

## Form ATS-N/UA: NMS Stock Alternative Trading System Report

### Cover Page

**NMS Stock ATS Name:** MS RPOOL ATS-6

**Operates Pursuant to Form ATS?** —

**Statement About Amendment:**
This Updating Amendment revises Part II, Item 1(a).  The change relates to the deletion of a business unit who will no longer trade in the ATS.  The change in Part II, Item 1(a) related to the business unit applies only to the operations of the Broker-Dealer Operator.

### Part I: Basic Information

**1. Is the ATS operated by a registered broker-dealer?:** Yes

**2. Name of the NMS Stock ATS:** MORGAN STANLEY & CO. LLC

**3. Name(s) under which business is conducted:** MS RPOOL ATS-6

**4a. Broker-Dealer SEC File No.:** 008-15869

**4a. Broker-Dealer CRD No.:** 000008209

**5a. Self-Regulatory Organization:** FINRA

**5b. Effective Date of Membership:** 06/30/1970

**5c. MPID:** MSRP

**6u. Website:** http://www.morganstanley.com/disclosures/morgan-stanley-dark-pools

**7. Primary Site Address:** 800 Secaucus Road, Secaucus, US-NJ, 07094

**8. Is Exhibit 1 (list of subscribers) on a public website?:** Yes

**9. Is Exhibit 2 (written standards for access) on a public website?:** Yes

### Part II: Written Safeguards and Procedures

**1a. Are any business units of the Broker-Dealer Operator permitted to enter interest?** Yes

   - **Details:** Any sales or trading business unit in the Institutional Equity Division (IED) or Fixed Income Division (FID) of MS&Co can enter an order (as described in Part III, Item 7(a)) or conditional indication (as described in Part III, Item 9(a)) in ATS-6 either (i) as principal; (ii) on behalf of registered broker-dealers on behalf of retail customers; or (iii) on behalf of eligible institutional customers of MS&Co and its affiliates, including institutional customers who are SEC registered investment advisers, pension funds, endowments, and asset managers.
Please see Part III, Item 2(b) for additional information regarding eligibility.
Business units of the Broker-Dealer Operator can enter orders and/or conditional indications in ATS-6, on an agency, principal and/or riskless principal capacity, subject to the eligibility requirements listed above. All business units of MS&Co use the MSCO MPID. Business units are described below and reflect the desk trading and managing risk for such product.
- Core (Cash) Products (trading and market making related to domestic and international equities)
- ETF (trading of domestic and international exchange traded funds and underlying equities)
- Morgan Stanley Electronic Trading (electronic trading of equities, options, and futures)
- Portfolio Products/Program Trading (trading of customer single orders and program orders; executing guaranteed benchmark trades and blind principal risk transactions)
- Convertible Products (trading of convertible bonds, convertible preferred equities, and equity warrants)
- Corporate Equity Products (handling of corporate repurchases)
- Exotic Products (trading of structured notes, complex OTC equity derivatives products, single name volatility/variance swaps, and dispersion)
- Index Products (trading of listed and OTC broad- and narrow-based index options, ETF options, ETN options, volatility index options, depository receipt options, volatility/variance swaps, equity structured products (OTC), and volatility index futures)
- Single Name Products (trading of listed and OTC equity options, equity sector index options, ETF options, depository receipt options, ETN options, volatility/variance swaps, and dividend swaps)
- Core Prime Brokerage (trading of equities, equity options, and other equity-related instruments to manage stock lending risk)
- Delta One Structured Products (engaging in financing transactions in a variety of equity and equity-related instruments by providing long and short equity linked exposure both with clients and swap market participants; structuring of customized financing, yield enhancement and hedging transactions for clients and Morgan Stanley)
- Macro Products - (1) FXEM (trading of currency products such as spot FX, FX options, forwards, NDFs and related FX derivatives; emerging markets credit securities and related derivatives); and (2) Interest Rate Products (trading of interest rate products such as US Treasury securities, interest rate derivatives and structured notes)
- Credit Products - (1) Credit Corporates (trading of credit corporate products including corporate bonds, CDS, credit indices, corporate loans or other credit derivatives; (2) Municipal Securities (trading of municipal securities and related derivatives); (3) Securitized Products Group (trading of securitized products including ABS, CMBS, RMBS, CLOs, CDOs, CDS, credit indices, agency debt securities, and whole loans)
- Commodities (trading of commodities including but not limited to oil, metals, power and natural gas)

**1b. Are the services offered and provided by the ATS to such business units the same?** —

**1c. Are there any arrangements between the ATS and such business unit?** No

**1d. Can order and trading interest of the business unit be routed out of the ATS?** No

**2a. Are any Affiliates of the Broker-Dealer Operator permitted to enter interest?** Yes

   - **Affiliates:** MS&Co has affiliates, including investment advisers, investment companies, U.S. broker-dealers, foreign broker dealers or equivalent entities; non broker-dealers; and bank regulated entities. Any such affiliate can enter an order (as described in Part III, Item 7(a)) or a conditional indication (as described in Part III, Item 9(a)) in ATS-6 either (i) as principal; (ii) as agent or riskless principal on behalf of retail customers; or (iii) as agent or riskless principal on behalf of eligible institutional customers of MS&Co and its affiliates, including institutional customers who are SEC registered investment advisers, pension funds, endowments, and asset managers. Please see Part III, Item 2(b) for additional information regarding eligibility. Such orders (including any orders resulting from any conditional match with a conditional indication, as described in Part III, Item 9(a)) are classified either as agency or principal on the books and records of the Broker-Dealer Operator, as described in the response to Part III, Item 7(a) and subject to the priority rules described in response to Part III, Items 7(a) and 11(a) and the counter-party selection/opt-out processes described in response to Part II, Item 3.

Since the effective date of the initial Form ATS-N for ATS-6, the following affiliates have executed in ATS-6:
- Morgan Stanley Canada Limited (foreign)
- Morgan Stanley Capital Services LLC (non BD)
- Morgan Stanley & Co. International plc (foreign)
- Morgan Stanley Smith Barney LLC (MPID: MSSB)
- Morgan Stanley Strategic Investments, Inc (non BD)
- Morgan Stanley Latam LLC (non BD)
- Morgan Stanley Fixed Income Ventures Inc. (non BD)
- Morgan Stanley Bank, N.A. (non BD)

With the exception of Morgan Stanley Smith Barney LLC, the affiliates listed above are either non broker-dealers (notated with "non BD") or foreign-broker dealers (notated with "foreign") and as such do not have their own MPID. As indicated, the above is a list of affiliates that have historically executed in ATS-6. The Broker-Dealer Operator will update this list to add any affiliate that subsequently executes in ATS-6 and to remove any entity that ceases to be an affiliate of the Broker-Dealer Operator.

**2b. Are the services offered and provided by the ATS to such Affiliates the same?** —

**2c. Are there any arrangements between the ATS and such Affiliate?** —

**2d. Can order and trading interest of the Affiliate be routed out of the ATS?** No

**3a. Can a Subscriber opt-out from interacting with the order and trading interest of the Broker-Dealer Operator?** Yes

   - **Explanation:** A Subscriber can opt out of interacting with orders or conditional indications (in each case, of either the Broker-Dealer Operator or an affiliate) that are deemed principal by Morgan Stanley, as described in Part III, Items 7(a) and 9(a).  (See Part III, Item 13 and 14 for additional information on the opt-out process).  This opt-out can be configured on a Subscriber basis (for all of the Subscriber's order flow) by communicating the request to account coverage or on an order by order basis or conditional-indication basis (for orders or conditional indications identified by the Subscriber) via FIX tag.

**3b. Can a Subscriber opt-out from interacting with the order and trading interest of an Affiliate?** Yes

   - **Explanation:** As indicated in Part II, Item 3(a) above, a Subscriber can opt out of interacting with orders or trading interest (either of the Broker-Dealer Operator or an affiliate) that are deemed principal by ATS-6, as described in Part III, Item 7(a).  This opt-out can be configured on a Subscriber basis (for all of the Subscriber's order flow) or on an order by order basis (for orders identified by the Subscriber).

**3c. Are the means to opt-out the same for all Subscribers?** —

**4a. Are there any arrangements between the Broker-Dealer Operator and a trading center?** No

**5a. Does the Broker-Dealer Operator offer any products or services to Subscribers?** Yes

   - **Products/Services:** As a full-service broker-dealer, MS&Co provides Subscribers and the Broker-Dealer Operator (Participants) with access to a number of products including algorithmic trading products, smart order routing technology, connectivity with third-party order entry systems via FIX, and Morgan Stanley proprietary order entry systems.  Any of these products can be used to enter orders or conditional indications that can access ATS-6 directly or indirectly (such as via algorithmic trading products or smart order routing technology).  (See Part III, Item 5).  There are no specific terms and conditions for use of these products to access ATS-6.

**5b. Are the terms and conditions of these products/services the same for all Subscribers?** —

**5c. Does an Affiliate of the Broker-Dealer Operator offer any products or services to Subscribers?** —

**5d. Are the terms and conditions of these products/services offered by the Affiliate the same for all Subscribers?** —

**6a. Do any employees of the Broker-Dealer Operator or its Affiliates access confidential trading information?** Yes

   - **Details:** The Broker-Dealer Operator does not run ATS-6 as a separate business, but rather operates it as one trading product or venue within the full service broker-dealer.  There are no employees of MS&Co. or its affiliates that are exclusively dedicated to ATS-6. Certain MS&Co. employees and affiliate employees have responsibilities with respect to MS&Co. and/or an affiliate in addition to responsibilities regarding the operation of ATS-6 and, as such, have the ability to access certain confidential trading information. Such employees' roles are summarized below. Employees who service ATS-6 may be employed by (i) MS&Co.; (ii) an affiliate of MS&Co. that has the ability to trade, including those who have executed trades within ATS-6, and are listed in Part II, Item 2(a); (iii) an affiliates of MS&Co. that has the ability to trade but has not executed in ATS-6 previously and thus is not listed in Part II, Item 2(a); or (iv) an affiliate of MS&Co. that does not transact in securities transactions but provides services to MS&Co. and its affiliates, such as Morgan Stanley Services Group, Inc. (MSSG), an affiliated service entity that provides MS&Co and affiliates with certain inter-company services including, infrastructure group support, information processing, communications and occupancy, and equipment).

MS&Co considers confidential trading information of ATS-6 to be (1) order-related information received by ATS-6; (2) execution-related information in ATS-6 (including identities of contra-parties to an execution); (3) conditional indication related information received by ATS-6; (4) firm-up request related information transmitted by ATS-6; and (5) data and analytics related solely to the activity of ATS-6 (with the exception of information made publicly available pursuant to reporting rules and regulations).

Listed below are the shared employees (which include employees and personnel such as consultants, temporary workers, and contingent workers of MS&Co., its trading affiliates and its non-trading affiliates (described above) that service both ATS-6 and MS&Co or an MS&Co affiliate and have access to confidential trading information of ATS-6, along with the basis for such access.

- Information Technology and Operations employees:  Various technology groups of MSSG and MS&Co are responsible for developing, monitoring, and testing and otherwise supporting various systems within MS&Co's trading infrastructure.  Employees within these groups include developers, systems engineers, or network engineers for MS&Co systems, including ATS-6.  They are responsible for reviewing and testing the coding, systems infrastructure, and network infrastructure that supports the MS&Co trading infrastructure including ATS-6 to ensure stability and continued functionality and are also responsible for developing, testing, and implementing additional functionalities for ATS-6 as needed.  Certain of these technology-related employees have access to the real-time production environment for ATS-6.  As a result and in order to support the operation and infrastructure of ATS-6, these technology-related employees are able to access databases containing order-related, conditional indication-related, firm-up related, and execution-related information and other confidential trading information of ATS-6.  Similarly, certain Operations employees support the clearance and settlement of transactions effected through MS&Co including transactions effected on ATS-6.  Those employees require access to confidential information of the Broker-Dealer Operator including confidential trading information of ATS-6, such as execution-related information and allocation information on order records, to assist in issues relating to clearance and settlement of such transactions.

- Sales and Trading employees:  sales and trading employees handle orders on behalf of themselves and their clients and include the desks described in Part II, Item 1(a), account coverage, electronic product, and strategists. Sales and trading employees could be employees of MS&Co., its trading affiliates or non-trading affiliates (as described above). Sales and trading employees provide trading discretion to determine when and how to handle an order, including routing an order directly or indirectly to ATS-6. Sales and trading employees, including account coverage, handle orders and conditional indications on behalf of clients.  This could involve providing trading discretion to determine when and how to handle an order or conditional indication, including routing an order or conditional indication directly or indirectly to ATS-6 among other market centers.  Account representatives assigned to clients whose orders or conditional indications may be entered in ATS-6 (among other market centers) have access, with respect to each applicable client, (i) to the order or conditional indication information prior to such information being entered into ATS-6, (ii) to the fact that such client's conditional indication or order received a firm-up request if applicable, and, (iii) as a result of servicing such client, to execution-related information, including the fact that such client's order or conditional indication was matched in ATS-6 with an order or conditional indication from another Participant in ATS-6.  Such sales and trading employees have access to their client information prior to entry and after execution in ATS-6.  Account representatives have system entitlements only for the clients they cover and only have visibility into where an order was ultimately routed and/or executed, whether to/in ATS-6 or any other market center. Sales and trading employees in electronic product are responsible for the development and maintenance of the electronic trading infrastructure, including ATS-6 and other electronic products and have access to client order information related to such electronic product maintenance. Strategists are responsible for compiling data and analytics in response to client and/or internal inquiries related to the use and functionality of electronic trading infrastructure, including ATS-6, and/or high touch offerings.  Electronic trading product and strategist employees have access to information about orders routed to and from ATS-6, the execution of those orders, and orders resting in the ATS, as well as any other market center in which orders are routed.

- Risk Management personnel:  MS&Co and its trading affiliates and non-trading affiliates (as described above) have employees that perform business unit risk management functions including market risk, non-market risk, credit risk, and technology risk with respect to the businesses of the Broker-Dealer Operator including ATS-6.  In performing these functions, these employees have access to order, conditional indication, and execution information and other confidential information relating to Morgan Stanley business activities, including confidential trading information of ATS-6, such as order-related information, conditional indication and/or firm-up related information, execution-related information, and client or desk trading activity.

- Supervisory and Oversight employees:  Employees of MS&Co. and its trading affiliates and non-trading affiliates (as descried above) acting in a supervisory or oversight capacity (including employees performing reviews at the direction of such employees) have access to confidential information relating to Morgan Stanley business activities, including confidential trading information of ATS-6.  Certain of these employees, among other responsibilities, have supervisory responsibilities reasonably designed to ensure that ATS-6 operates as intended.  They are also responsible for evaluating and reviewing Participant performance, assessing Participants and prospective Participants in connection with eligibility requirements (See Part III, Item 2(b)), reviewing market developments to adhere to regulatory obligations, and conducting analyses in connection with the foregoing.  In furtherance of these responsibilities, these employees have access to confidential trading information of ATS-6.

- Legal, Compliance and other Guardianship functions:  Employees in the Legal and Compliance Departments and others involved in complying with regulatory requirements support, with respect to such requirements, the businesses of MS&Co, including the business of ATS-6.  These employees provide such support by, among other functions, responding to regulatory inquiries, conducting compliance and other reviews, performing internal audits of the trading infrastructure of the Broker-Dealer Operator (including the trading infrastructure supporting ATS-6), all with respect to activity within ATS-6.  In the course of performing such functions and generally providing support to ATS-6, those employees have access, on an as-needed basis, to confidential trading information of ATS-6, such as order-related information, conditional-indication and/or firm-up related information, and execution-related information in ATS-6.
The Broker-Dealer Operator has written policies and procedures designed to safeguard confidential trading information. Such policies and procedures are global and, as such, apply to the Broker-Dealer Operator and all of its affiliates. The Broker-Dealer Operator and affiliate employees' access to confidential trading information is dependent upon the level of information that is needed to perform their duties and responsibilities related to ATS-6. MS&Co. and its trading affiliate and non-trading affiliate employees (as described above) are strictly prohibited from using such information in an unauthorized manner and from discussing the details of any trades in ATS-6 with persons who do not need such information to carry out their designated duties and responsibilities. Access to such information is granted as needed to perform these duties and responsibilities.

**6b. Does any other entity provide services to the ATS?** Yes

   - **Providers:** As indicated in the response to Item 6(a), there are no employees of MS&Co. or its affiliates that are exclusively dedicated to ATS-6. Certain MS&Co. employees and affiliate employees have responsibilities with respect to MS&Co. and/or an affiliate in addition to responsibilities regarding the operation of ATS-6 and, as such, have the ability to access certain confidential trading information. . As described in Item 6(a), employees who service ATS-6 may be employed by (i) MS&Co.; (ii) one of MS&Co.'s trading affiliates, including those listed in Part II, Item 2(a); (iii) one of MS&Co.'s trading affiliates who are not listed in Part II, Item 2(a); or (iv) a non-securities trading affiliate of MS&Co, such as MSSG. MS&Co has an agreement with an affiliated service entity, MSSG, in which MSSG agrees to provide MS&Co with certain inter-company services including operations, technology, legal, compliance and other infrastructure group support.

In addition, Equinix, Inc. operates the NY5 data center that hosts the servers that operate ATS-6 and provides the connectivity services described in Part III, Item 6 (Connectivity and Co-location).  Equinix is not authorized to access confidential trading information of ATS-6.

**6c. Do any of these service providers also use the services of the ATS?** Yes

   - **Details:** As MSSG is an affiliate of the Broker-Dealer Operator, affiliates of the Broker-Dealer Operator are also affiliates of MSSG.  Thus, affiliates of the Broker-Dealer Operator that can enter orders or conditional indications in ATS-6 identified in response to Part II, Item 2 are also affiliates of the service provider MSSG for purposes of this Item 6(c).

**6d. Are the services of the ATS to such service provider the same as for other similar Subscribers?** —

**7a. Description of Safeguards and Procedures:**
MS&Co maintains restrictions (including permissioned access) and policies and procedures designed to safeguard the confidential trading information of ATS-6.
Access to confidential trading information of ATS-6 is limited to the shared employees described in Part II, Item 6(a) (that is, information technology and operations employees; sales and trading employees; risk management employees; supervisory and oversight employees; and legal, compliance, and other with guardianship functions), to the systems that support ATS-6, and smart order routing technology of MS&Co.  A description of applicable safeguards and oversight procedures is provided below.
-  Systems with Access to Order and Execution-Related Information:  The order and execution management systems used by the sales and trading employees (including account representatives) described in response to Part II, Item 6(a), can route orders and/or conditional indications to ATS-6, among other destinations.  Similarly, smart order routing technology and algorithmic trading products of MS&Co can route orders and/or conditional indications to ATS-6 among other destinations.  These systems receive information regarding where such orders were routed and/or executed, which could be ATS-6 or could be any other market center.  These systems also receive firm-up requests which indicate that there is potential contra-side interest in ATS-6.  In addition, the smart order routing technology of the Broker-Dealer Operator has access on a continuous basis about open orders and conditional indications residing in ATS-6.  (See Part III, Item 9(a)).  MS&Co maintains a database containing trading information of its NMS Stock ATSs.  Authorized employees (generally, authorized information technology and operations employees and certain authorized sales and trading employees, as needed, all as described in Part II, Item 6(a)) have access to the database in order to run queries and generate reports of trading activity within ATS-6.  Examples of such reports are volume reports, reports regarding firm-up rates, and order-to-fill ratio reports.
- Use of System Entitlements:  MS&Co assigns permissioned logins to access ATS-6 and other aspects of MS&Co's trading infrastructure.  These permissioned logins serve as controls to protect confidential trading information, including confidential trading information of ATS-6.  Relevant supervisors must approve all employee access to ATS-6 as well as other MS&Co systems with access to order and execution information.  Access privileges are aligned to business function and designated reviewers evaluate access based upon the employee's current role.  Access is revoked when no longer required or upon an employee's termination.  An employee that previously had access to confidential trading information of ATS-6 will no longer have access to such information upon revocation.  Additionally, pursuant to written supervisory procedures governing access to MS&Co NMS Stock ATSs, a supervisor conducts a quarterly review of access and entitlements relating to ATS-6.  This review is designed to confirm that those with access should continue to have access and also addresses whether any individual has transferred roles such that he or she should no longer require access.
- Application of Global Cyber Security Program:  Morgan Stanley's global cyber security program, including measures designed to detect and prevent unauthorized intrusions to Morgan Stanley systems, apply to MS&Co's trading infrastructure, including ATS-6.
- Use of Information Barriers: MS&Co maintains information barriers to separate employees and systems with access to confidential trading information of its NMS Stock ATSs from those not permitted to access such information.  These information barriers serve as controls to protect confidential trading information, including confidential trading information of ATS-6.  Morgan Stanley maintains a network firewall and customer gateways that surround its trading infrastructure, including ATS-6, for security purposes.  Subscribers (excluding Subscribers affiliated with the Broker-Dealer Operator) connect from outside that firewall and those customer gateways.  The firewall and customer gateways seek to protect access to confidential information of Morgan Stanley, including confidential trading information of ATS-6.
- Personal Trading Policy and Restrictions: MS&Co prohibits all employees, including those with access to confidential trading information of ATS-6, from trading based on non-public or other confidential information, which would include confidential information of clients and, more specifically, confidential trading information in ATS-6.  Pursuant to the Morgan Stanley Global Employee Trading, Investing, and Outside Business Activities Policy and a supplement to that policy governing the Global Sales and Trading Divisions including the Institutional Equity Division of MS&Co, employees (unless an exception is granted) must effect personal transactions in Employee Securities Account maintained at Morgan Stanley.  Further, the Morgan Stanley Global Employee Trading Policy requires employees to seek pre-approval for purchases and sales of securities (unless the Global Employee Trading Policy or applicable supplement provides an exemption for a specific type of security, such as an ETF).  In addition, employees generally must hold securities purchased in their Employee Securities Accounts for a minimum of 30 calendar days (or obtain pre-approval for such sale prior to 30 calendar days under exceptional circumstances.)  Employees are prohibited from effecting transactions that raise an actual or apparent conflict of interest with MS&Co or its clients or in securities on Morgan Stanley's Restricted List.  Pursuant to applicable written policies and procedures, compliance and supervisory personnel, as applicable, review employee personal trading activity.  Such reviews are designed to confirm compliance with MS&Co's policies regarding pre-approval, holding period, conflicts of interest (including trading based upon confidential trading information), and Restricted List compliance.
- Morgan Stanley Code of Conduct: Morgan Stanley requires all employees to be bound by and observe its Code of Conduct, including provisions that address the handling of client information and impose a duty of confidentiality.

**7b. Can a Subscriber consent to the disclosure of its confidential trading information?** —

**7d. Summary of roles of persons with access to confidential trading information:**
The shared employees described in response to Part II, Item 6(a) are the only Persons who have access to confidential trading information of ATS-6.  As described in Part II, Item 7(a), the smart order routing technology of the Broker-Dealer Operator has access on a continuous basis about open orders and conditional indications residing in ATS-6 and that information remains in ATS-6.

### Part III: Manner of Operations

**1. Types of Subscribers:** Investment Companies, Issuers, Brokers, Asset Managers, Hedge Funds, Banks, Other

**2a. Is a Subscriber required to be a registered broker-dealer?** No

**2b. Are there any other conditions for eligibility to become a Subscriber?** Yes

   - **Conditions:** Orders and conditional indications can be entered in ATS-6 by (i) registered broker-dealers on behalf of retail customers; (ii) eligible institutional customers of the Broker-Dealer Operator and its affiliates, including institutional customers who are SEC registered investment advisers, pension funds, endowments, and asset managers; and (iii) the Broker-Dealer Operator and its affiliates acting as or on behalf of such retail brokers or institutional customers or acting as principal.  Such Persons must meet the credit and counterparty risk and other onboarding standards applicable for clients of the Broker-Dealer Operator.  The same process applies to a Person seeking to access ATS-6's services, subject to the listed eligibility criteria.
Unaffiliated retail broker-dealer Subscribers must provide a written representation that the orders and/or conditional indications they enter in ATS-6 are for the account of retail customers.
Institutional customers must be deemed eligible to enter orders and/or conditional indications in ATS-6 based upon the nature of their trading activity (or, for a new Institutional Customer, its anticipated trading activity).  The Broker-Dealer Operator evaluates the nature of an Institutional customer's trading activity based upon the amount that and frequency with which the customer provides liquidity rather than takes liquidity and the status of the institutional customer - that is, whether it is a broker-dealer, registered investment adviser, pension fund, endowment, or asset manager.
MS&Co and its affiliates are able to access ATS-6's services to act as or on behalf of either a retail broker-dealer or an institutional customer or to enter principal orders and/or conditional indications, as described in Part III, Item 7(a) and Item 9(a).

**2c. Are the conditions for eligibility the same for all persons?** No

   - **Differences:** The conditions to be satisfied, and any relevant differences, are described in response to Part III, Item 2(b).  That is, unaffiliated registered broker-dealers may enter orders and conditional indications only on behalf of retail customers; the Broker-Dealer Operator and affiliates may enter orders and conditional indications on behalf of retail customers, eligible institutional customers, or as principal; and institutional customers are subject to specific eligibility requirements.

**2d. Is there a written agreement required to use the ATS?** No

**3a. Are there any conditions under which a Subscriber may be excluded?** Yes

   - **Conditions:** The Broker-Dealer Operator can exclude any Subscriber that no longer meets the eligibility criteria described in response to Part III, Item 2(b).  For example, an unaffiliated broker-dealer Subscriber would become ineligible if it no longer entered orders or conditional indications on behalf of retail customers.  In addition, MS&Co may determine not to maintain a client relationship with a Subscriber for reputational, regulatory, credit, conduct, or other similar reasons, which would have the effect of excluding such Subscriber from the services of ATS-6.  Examples of such reasons include a pattern of a Subscriber not responding timely to firm-up requests or a Subscriber under regulatory scrutiny based upon its conduct in the market generally.  Thus, it is possible to exclude a Subscriber specifically from ATS-6 or more generally from services of the Broker-Dealer Operator, including based upon such Subscriber's activity in ATS-6.

**3b. Are these conditions the same for all Subscribers?** —

**4a. Hours of Operation:**
ATS-6 operates on regular business days during normal trading hours (9:30 a.m. to 4:00 p.m. eastern time, unless delayed, shortened, or otherwise modified by an exchange), but does not trade an NMS stock until there is an execution for that NMS stock on the primary exchange.  ATS-6 accepts orders beginning at 8:00 a.m.  As an exception to this practice, the Broker-Dealer Operator may choose to operate ATS-6 during normal trading hours when the primary exchange is not operating if the Broker-Dealer Operator deems there to be sufficient liquidity in the marketplace in the applicable NMS stock.  The Broker-Dealer Operator may suspend crossing in ATS-6 during market hours under anomalous conditions.  Examples of such conditions include market data issues, technology issues, or reporting issues, all with respect to either the Broker-Dealer Operator or the market generally.

**4b. Are the hours of operation the same for all Subscribers?** Yes

**5a. Are Subscribers permitted to enter orders and other messages by electronic means?** Yes

   - **Protocols:** Participants can enter orders or conditional indications via FIX directly into the trading infrastructure of the Broker-Dealer Operator and such orders or conditional indications are converted to an MS&Co proprietary binary protocol prior to being entered into ATS-6.  Participants cannot enter orders via binary.  The standard version of FIX offered is FIX 4.2, although the Broker-Dealer Operator continues to support legacy FIX 4.0 and 4.1 sessions.  Smart order routing technology (that is, the technology that makes decisions regarding where to route orders among various sources of internal and external liquidity, including ATS-6) and algorithmic trading products of the Broker-Dealer Operator, which are available for use by clients, traders, and sales traders, can enter orders or conditional indications into ATS-6 either via binary or FIX protocol.  Orders or conditional indications entered via FIX protocol are converted to the same binary protocol referenced above.

**5b. Are these protocols the same for all Subscribers?** No

   - **Differences:** The FIX protocol available to the Broker-Dealer Operator and affiliates is more extensive than the FIX protocol offered to non-affiliate Subscribers.  The FIX protocol offered to the Broker-Dealer Operator and affiliates has additional FIX tags relevant to the nature of this order flow (e.g., tags relating to affiliate status to address self-trading or restrict other interactions).

**5c. Are there any other means to enter orders?** Yes

   - **Details:** Eligible Participants can enter orders and conditional indications in ATS-6 via a number of front-end order management systems (OMSs), including third-party OMSs, an OMS of the Broker-Dealer Operator available to internal sales traders and traders, and an OMS provided by the Broker-Dealer Operator to Subscribers.

Participants can enter orders and conditional indications in ATS-6 (i) directly (as described in Part III, Item 5(a)); (ii) via smart order routing technology of the Broker-Dealer Operator that can enter orders or conditional indications into ATS-6 (including with an instruction to route any such order or conditional indication only to ATS-6); or (iii) via algorithmic trading products provided by the Broker-Dealer Operator that can enter orders or conditional indications directly into ATS-6 or via smart order routing technology, in each case provided that the order or conditional indication is for an eligible Participant as described in Part III, Item 2(b).  Such technology or products may be customized by the Broker-Dealer Operator for a particular Subscriber based upon trading strategies contemplated by that Subscriber for routing to trading centers, one of which can be ATS-6.

**5d. Are the terms and conditions for other means the same for all Subscribers?** —

**6a. Are co-location services offered?** —

**6c. Are any other means offered that reduce the latency of communications?** No

**6e. Are any other means offered that reduce the latency of communications between the ATS and its Subscribers?** No

**7a. Order Types and Attributes:**
ATS-6 matches orders (as described below) at the midpoint of the best bid and best offer from markets that display protected quotations as defined in Regulation NMS (the best bid and offer) and accepts conditional indications (as described in Part III, Item 9(a)) that can be conditionally matched with other conditional indications and with orders that elect to interact with conditional indications and, following a firm-up period, can result in a midpoint match.  Part III, Item 11(a) provides additional information regarding the operation of ATS-6, including priority rules, which may be helpful to review first for applicable background.
ATS-6 accepts market and limit orders (including buy, sell, sell short, and sell short exempt limit orders).  ATS-6 accepts Day orders and IOC orders (as Time in Force attributes).  ATS-6 accepts round-lot, odd-lot and mixed-lot orders. Part III, Item 8(c) provides information about opting out of odd-lot quantity.
Participants and the Broker-Dealer Operator's smart order routing technology and algorithmic trading products can designate an order sent to ATS-6 with a minimum fill quantity instruction.  ATS-6 does not aggregate multiple contra-side orders to satisfy a minimum fill quantity on a single order.  The minimum fill quantity constraint applies to every execution in ATS-6, except where the unexecuted portion of an order is less than the minimum fill quantity, in which case ATS-6 will not cancel the unexecuted quantity and such quantity will remain in ATS-6 for execution. If a Participant has opted out of interacting with odd-lot orders and the unexecuted quantity is an odd-lot, then the unexecuted odd-lot quantity will be cancelled back to the Participant, otherwise it will remain in ATS-6 for execution.
ATS-6 does not support post-only orders.
ATS-6 does not route orders to other Trading Centers.
Orders and conditional indications in ATS-6 that are eligible to participate at the midpoint of the best bid and offer are prioritized for matching based on type of interest (i.e., orders have priority over conditional indications), capacity, size, and time.
As described in response to Part III, Item 9(a), orders that elect to interact with conditional indications and conditional indications that are the subject of a conditional match enter a firm-up period.  Such orders and conditional indications can interact only with those conditional indications and orders during that firm-up period and during that period cannot interact with other orders and/or conditional indications in ATS-6 that are not subject to the conditional match.
An order that ATS-6 receives from an affiliate of the Broker-Dealer Operator on behalf of that affiliate's client(s) is classified as an agency order.  An order that ATS-6 receives from an affiliate trading for the affiliate's own account for the affiliate's client facilitation/market making activity (which the Broker-Dealer Operator handles as agent for its affiliate) yields priority to other agency orders (and is classified as an agency order for counterparty selection/opt-out purposes as described in Part II, Item 3).  An order that ATS-6 receives from an affiliate for the affiliate's own account other than for the affiliate's client facilitation/market making activity is deemed a principal order by Morgan Stanley for priority and for counterparty selection/opt-out purposes, notwithstanding that the Broker-Dealer Operator's capacity otherwise would be as agent for its affiliate.
An order could lose execution priority to a later arriving order eligible to trade at the midpoint of the best bid and offer if the later arriving order ranks higher with respect to other priority factors such as size or capacity.  Additionally, an order that elects to interact with conditional indications and is subject to a conditional match will not be eligible to match with other orders or conditional indications during the firm-up period, but will regain its prior priority with respect to any unexecuted quantity at the end of the firm-up period.
An order receives a new time stamp when it enters ATS-6 and when any term of the order is subsequently amended by the party entering it, other than a decrease in quantity/size.

**7b. Are the order types, attributes, and instructions the same for all Subscribers?** —

**8a. Does the ATS require a minimum or maximum order size?** —

**8c. Are odd-lot orders accepted and executed?** Yes

   - **Procedures:** Odd-lot orders and conditional indications are handled in the same manner as round-lot orders and conditional indications. Participants can opt out of interacting with odd-lot orders and conditional indications (either for orders or trading interest identified by the Participant or as a default setting for all of the orders or trading interest of that Participant set by the Broker-Dealer Operator at the Participant's request). The ability to opt-out of interacting with only odd-lot orders or only odd-lot conditional indications is not supported. Part III, Items 7(a) and 9(a) describe the handling of unexecuted odd-lot quantity when using a minimum fill quantity instruction.

**8d. Are odd-lot procedures the same for all Subscribers?** Yes

**8e. Are mixed-lot orders accepted and executed?** Yes

   - **Procedures:** Mixed-lot orders and conditional indications are handled in the same manner as round-lot orders and conditional indications. Participants can opt out of interaction with the odd-lot quantity of mixed-lot orders and conditional indications as described in Part III, Item 8(c) above. Part III, Items 7(a) and 9(a) describe the handling of unexecuted odd-lot quantity when using a minimum fill quantity instruction.

**8f. Are mixed-lot procedures the same for all Subscribers?** Yes

**9a. Does the ATS send any messages to indicate trading interest?** —

**10a. Opening/Re-opening/Closing Procedures:**
ATS-6 organizes buy day orders and conditional indications by priority then sell day orders and conditional indications by priority, after which orders may be matched and orders and conditional indications can be subject to a conditional match.
For opening in a subject NMS stock, trading on ATS-6 begins once there is an execution in that NMS stock on its primary exchange.  As an exception to this practice, the Broker-Dealer Operator may choose to operate ATS-6 during normal trading hours when the primary exchange is not operating if the Broker-Dealer Operator deems there to be sufficient liquidity in the marketplace in the applicable NMS stock.  For re-opening, trading is triggered by the primary exchange providing notification of its trading status.  For both opening and re-opening, the Broker-Dealer Operator may also (for example, in exceptional market conditions such as periods of volatility) issue an administrative command not to initiate trading on ATS-6.

**10b. Are these procedures the same for all Subscribers?** Yes

**10c. Unexecuted Orders Procedures:**
Unexecuted day orders and conditional indications remain in ATS-6 and are handled as described in the response to Item 10(a) both at the start of regular trading hours and following a stoppage of trading in a security during regular trading hours.  For clarity, each unexecuted day order or conditional indication remains in ATS-6 during normal trading hours, is not cancelled upon a stoppage of trading, and will expire by its terms at the end of a trading day (or, in the case of a conditional indication, if it is not executed in a conditional match).
ATS-6 does not support opening or re-opening order types or conditional indications.

**10d. Is there any difference in execution procedures during trading hours?** Yes

**10e. Is there any difference in pre-opening or execution procedures following a stoppage?** No

**11a. Structure of the NMS Stock ATS:**
ATS-6 is a real-time, continuous match dark pool that matches orders in NMS stocks from eligible ATS-6 Participants (as described in response to Part III, Item 2(b)).  The Broker-Dealer Operator lists on the website provided in response to Part I, Item 6 and otherwise provides monthly notice of those NMS stocks not eligible to be matched in ATS-6.

Generally, the NMS stocks not eligible for matching in ATS-6 are securities with a regulatory or practical limitation on matching, such as securities on Morgan Stanley's restricted list, securities for which Morgan Stanley is the issuer; securities for which ATS-6 is approaching the 5% volume threshold under Regulation ATS, or the volume/notional thresholds under Regulation SCI, or securities with anomalous characteristics. This could result in the suspension of matching in individual securities, including those with high volumes, to stay under such thresholds.

ATS-6 accepts orders, as described in response to Part III, Item 7(a), and conditional indications, as described in response to Part III, Item 9(a).  ATS-6 operates a matching process as described in response to Part III, Item 7(a) and Part III, Item 9(a)).  All executions in ATS-6 occur at the midpoint of the best bid and offer.

Orders and conditional indications in ATS-6 that are eligible to participate at the midpoint of the best bid and offer are prioritized for matching based on type of interest (i.e., orders have priority over conditional indications), capacity, size, and time.  Limit prices are used to determine eligibility to match at midpoint but do not play a role in determining priority.

**11b. Are the means that facilitate access the same for all Subscribers?** —

**11c. Rules and procedures of the NMS Stock ATS:**
ATS-6 operates pursuant to the matching process described in response to Part III, Item 11(a), with interaction among orders and conditional indications subject to the priority rules described in response to Part III, Items 7(a) and 11(a) and the handling of conditional indications as described in response to Part III, Item 9(a).  Orders and conditional indications are also subject to the Counter-Party Selection procedures described in response to Part III, Item 14(a) and Part II, Item 3.  As described in those sections, the Broker-Dealer Operator permits (i) Participants to elect to have their orders interact with conditional indications (in the manner described in Part III, Item 9(a)) and (ii) Participants to opt out of interacting with orders and conditional indications deemed principal in ATS-6 by Morgan Stanley, as described in Part III, Item 7(a).  For clarity, conditional indications cannot opt out of interacting with orders or with other conditional indications in ATS-6, other than as stated above.

ATS-6 accepts short sale and short sale exempt orders and conditional indications and the Broker-Dealer Operator handles such orders (including any orders resulting from a conditional indication following a firm-up request) pursuant to the policies and procedures adopted pursuant to Rule 201(b) of Regulation SHO.

ATS-6 does not execute transactions in NMS stocks that are the subject of a locked or crossed market.

An order or conditional indication that ATS-6 receives from an affiliate for the affiliate's own account other than for the affiliate's client facilitation/market making activity is deemed a principal order or conditional indication by Morgan Stanley for priority and for counterparty selection/opt-out purposes, notwithstanding that the Broker-Dealer Operator's capacity otherwise would be as agent for its affiliate.

In the event of an error of ATS-6 or of the Broker-Dealer Operator, the Broker-Dealer Operator will bust the trade or handle the liquidation or covering of the error position in a Morgan Stanley error account.

An order or conditional indication receives a new time stamp when it enters ATS-6 and when any term of the order or conditional indication is subsequently amended by the party entering it, other than a decrease in quantity/size.  Orders and conditional indications (and executions of both) are timestamped with microsecond granularity.

**11d. Are these rules and procedures the same for all Subscribers?** Yes

**12a. Are there any arrangements to provide liquidity?** —

**13a. Is order or trading interest segmented?** Yes

   - **Procedures:** ATS 6 accepts orders and conditional indications only from or on behalf of the categories of Participants described in response to Part III, Item 2(b), namely (i) registered broker-dealers on behalf of retail customers; (ii) eligible institutional customers of the Broker-Dealer Operator and its affiliates, including institutional customers who are SEC registered investment advisers, pension funds, endowments, and asset managers; and (iii) the Broker-Dealer Operator and its affiliates acting on or on behalf of such retail brokers or institutional customers or acting as principal.  Such categorization is used solely for determining eligibility for ATS-6, except that orders deemed principal orders have a lower priority and other Participants can opt out of interacting with principal order flow.  As indicated in Part III, Item 2(b), institutional customers must be deemed eligible to enter orders and/or conditional indications in ATS-6 based upon the nature of their trading activity (or, for a new Institutional Customer, its anticipated trading activity).  The Broker-Dealer Operator evaluates the nature of an Institutional customer's trading activity based upon the amount that and frequency with which the customer provides liquidity rather than takes liquidity.  Such calculations are made on a monthly basis, but can be made intra-month if there is an extraordinary change in a Participant's activities during that month.
In addition, as indicated above, a Participant can submit either an order (as described in Part III, Item 7(a)) or a conditional indication (as described in Part III, Item 9(a)).  By default, orders that access ATS-6 do not interact with conditional indications and Participants must elect to have their orders interact with conditional indications.
For clarity, conditional indications cannot opt out of interacting with orders or with other conditional indications in ATS-6.

**13b. Is the segmentation the same for all Subscribers?** Yes

**13c. Does segmentation depend on whether the order is from a customer?** Yes

**13d. Are segmentation categories disclosed to Subscribers?** Yes

   - **Content:** The Broker-Dealer Operator communicates to its internal Participants (e.g., internal trading desks of the Broker-Dealer Operator) that their orders or conditional indications deemed as principal will be treated as principal.  Additionally, the personnel identified in response to Part II, Item 7(d) have access, as needed, to participant categorization information.  Categorization is reviewed and changes are made on a monthly basis.

**13e. Is the disclosure the same for all Subscribers?** —

**14a. Is a Subscriber designated to interact with specific trading interest?** Yes

   - **Details:** As described in response to Item 13(a), the Broker-Dealer Operator permits (i) Participants to elect to have their orders interact with conditional indications (in the manner described in Part III, Item 9(a)) and (ii) Participants to opt out of interacting with orders and conditional indications deemed principal in ATS-6, as described in Part III, Item 7(a).  For clarity, conditional indications cannot opt out of interacting with orders or with other conditional indications in ATS-6, other than as stated above.
In addition, orders or conditional indications may be designated (a) not to interact with certain orders or conditional indications to comply with regulatory requirements (such as requirements under ERISA for applicable accounts relating to principal and agency crosses); (b) not to cross with orders or conditional indications from the same Participant (where crossing may otherwise be permitted); and (c) to execute in an amount not less than a minimum quantity indicated as described in Part III, Item 7(a).  Such designations can be made on an order-by-order basis (or a conditional indication basis) for orders or trading interest identified by the Participant or as a default setting for all of the orders or trading interest of that Participant set by the Broker-Dealer Operator at the Participant's request.  Designations that a Participant makes on an order-by-order basis (or a conditional indication basis) are effective immediately with respect to that order or conditional indication.  Designations to change a default setting become effective once the requisite change can be made, which can vary in time.

**14b. Is the counter-party selection the same for all Subscribers?** —

**15a. Does the ATS use electronic communications to display order and trading interest?** No

**15b. Is order and trading interest displayed to anyone other than Subscribers?** Yes

   - **Details:** While ATS-6 does not display orders to any Person(s) for purposes of the display requirement of Rule 301(b)(3) of Regulation ATS, certain information in ATS-6 is "made known to" the Broker-Dealer Operator's smart order routing technology on a continuous basis.  As described in Part III, Item 9(a), such information includes symbol, side, size, type of interest (that is, whether a conditional indication or an order, and whether market or limit), limit price (if applicable), Participant, type of Participant, and information about instructions relating to the conditional indication or order (e.g., minimum fill quantity instruction, election to interact with conditional indications, instruction not to interact with principal orders or conditional indications).  Authorized personnel of the Broker-Dealer Operator that support the Broker-Dealer Operator's smart order routing technology have access to such information as necessary to support the operation of such technology.
In addition, a conditional indication that is the subject of a conditional match will receive a firm-up request.  While again not a display for purposes of the display requirement of Rule 301(b)(3) of Regulation ATS, this firm-up request will "make known to" the recipient the fact that there is potential contra-side interest in ATS-6.  The firm-up request is sent only to the Participant or system that sent the conditional indication generating the conditional match.  Finally, when smart order routing technology of the Broker-Dealer Operator routes an order or a conditional indication to ATS-6, such smart order routing technology necessarily knows that such order or conditional indication was routed to ATS-6.

**15c. Are the display procedures the same for all Subscribers?** No

   - **Differences:** As indicated above, certain information is made known only to the Broker-Dealer Operator's smart order routing technology, as described in Part III, Item 9(a).  Also, as described in Part III, Item 9(b), the firm-up quantity made known on a firm-up request will vary depending upon whether firm-up request is responding to a conditional indication sent directly to ATS-6 by a Participant or is responding to a conditional indication sent to ATS-6 by MS&Co's smart order routing technology or algorithms.

**16a. Are orders or other messages routed out of the ATS?** No

**17a. Is there any difference between the treatment of order and trading interest based on source?** No

**17b. Is the treatment the same for all Subscribers?** Yes

**18a. Does the ATS execute trades outside of its regular trading hours?** No

**19a. Fees:**
The Broker-Dealer Operator does not operate ATS-6 as a stand-alone NMS Stock ATS and there is no standard fee schedule for ATS-6.  There is no explicit transaction fee for executions in ATS-6.

**19b. Bundled Services/Fees:**
The Broker-Dealer Operator negotiates commission rates (and, where applicable, financing rates) with clients that cover all of the broker-dealer services provided to that client, which could include access to ATS-6.  Such services may include high-touch trading services, low-touch trading services, financing services, and access to research.  The negotiation process is the same even when the only service the client seeks to access is ATS-6.  Commission rates range from zero cents per share to 5% of the value of the transaction in ATS-6, although commission amounts have exceeded such rates under very limited circumstances based on the nature of the transaction.  In addition, certain clients may negotiate a commission rate under which the client agrees to pay the fees and receive the rebates of venues to which the client's orders were routed and that result from removing or providing liquidity on those venues.  At times, the amount of rebates that a client receives may exceed the amount charged, which could result a net rebate to such client irrespective of the negotiated commission rate.

Morgan Stanley is assessed certain Consolidated Audit Trail (CAT) regulatory fees relating to trading in ATS-6 as an execution venue.  For transactions executed in ATS-6 where neither of the parties to the transaction are registered FINRA broker-dealers, Morgan Stanley is the CAT Executing Broker for both the buyer and the seller.  For transactions executed in ATS-6 where one of the parties to transaction is a registered FINRA broker-dealer, that registered FINRA broker-dealer will be the CAT Executing Broker on their side of the transaction and Morgan Stanley as the contra CAT Executing Broker.  For transactions executed in the ATS between two parties who are both FINRA registered broker-dealers, the registered FINRA broker-dealer who is the seller will be the CAT Executing Broker and Morgan Stanley will be the CAT Executing Broker for the buyer.  The CAT regulatory fees are considered by the Broker-Dealer Operator when negotiating individual commission rates with clients, and as such Morgan Stanley may determine to pass back the entire CAT regulatory fees to its clients for their transactions in ATS-6 based on the factors described in the paragraph above that Morgan Stanley uses to negotiate commission rates with its clients (e.g. the services provided to that client).

**19c. Rebates and Discounts:**
As indicated in response to Item 19(a), certain clients may negotiate a commission rate under which the client agrees to pay the fees and receive the rebates of venues to which the client's orders were routed and that result from removing or providing liquidity on those venues.  At times, the amount of rebates that a client receives may exceed the amount charged, which could result a net rebate to such client irrespective of the negotiated commission rate.

**20a. Suspension of Trading Procedures:**
The Broker-Dealer Operator may, in its sole discretion, elect to suspend crossing in ATS-6, including crossing in any individual NMS stock, such as for example, during market hours under anomalous conditions.  ATS-6 will accept orders and conditional indications for NMS stocks that are halted and will resume crossing in such NMS stocks once such halt is lifted.  During a halt, a Participant can cancel or modify an order or conditional indication.  If the Broker-Dealer Operator suspends crossing in ATS-6, it may continue to accept orders and conditional indications in the affected NMS stock(s), based upon the circumstances giving rise to the suspension.  Such decisions will be made on a case-by-case basis, in consultation with Legal, Compliance, and Business Unit Risk Management.

The Broker-Dealer Operator will endeavor to communicate to Participants through coverage personnel with respect to suspensions that are expected to have a material impact on such Participant(s).  The nature and/or fact of such communication will vary based upon the nature and/or anticipated duration of the suspension or halt.

The Broker-Dealer Operator will reject orders and conditional indications for NMS stocks that have been suspended for purposes of the 5% volume threshold of Regulation ATS, Regulation SCI volume/notional thresholds and for NMS stocks that are not eligible for trading pursuant to Morgan Stanley's restricted list. This could result in the suspension of matching in individual securities, including those with high volumes, to stay under such thresholds.

**20b. Are these procedures the same for all Subscribers?** Yes

**21a. Trade Reporting Arrangements:**
All reportable transactions effected in ATS-6 are over-the-counter or OTC transactions that are trade-reportable pursuant to applicable trade reporting requirements.  Transactions effected by ATS-6 are reported to the FINRA/Nasdaq (Carteret) trade reporting facility.  The possible exception to this practice is that the Broker-Dealer Operator may choose instead to report a small number of transactions to the FINRA/NYSE trade reporting facility and/or the FINRA/Nasdaq (Chicago) trade reporting facility to maintain connectivity to the FINRA/NYSE trade reporting facility and/or the FINRA/Nasdaq (Chicago) trade reporting facility as ready and viable backups. Where appropriate, matches between two internal business units or trading desks of the Broker-Dealer Operator or of an affiliate are treated as journal entries (internal movements of positions and monies) and therefore are not trade reported.

**21b. Are these arrangements the same for all Subscribers?** Yes

**22a. Clearance and Settlement Arrangements:**
MS&Co is a member of the National Securities Clearing Corporation ("NSCC") and the Depository Trust Company ("DTC").  MS&Co clears and settles securities transactions through established clearance and settlement protocols.  If the transaction is with a client that custodies its assets at MS&Co, MS&Co will clear and settle the transaction in that client's account.  If the transaction is with a client that clears and settles on a delivery-versus-payment/receive-versus-payment (DVP/RVP) basis through a third-party custodian, MS&Co will clear and settle the transaction with the third-party custodian on a DVP/RVP basis.  If the transaction is with a broker-dealer, the transaction will clear through NSCC and settle through DTC on a broker-to-broker basis.  If the match is between two internal business units or trading desks of MS&Co or between two internal business units or trading desks of an affiliate, there is no change of beneficial ownership and therefore no transaction to clear or settle.  As indicated in Part III, Item 22(b) and Part III, Item 21(a), such matches are treated as journal entries.

There are no procedures or material arrangements specific to ATS-6 (as compared to the procedures or arrangements generally of the Broker-Dealer Operator described above) to facilitate the clearance and settlement of transactions.

The Broker-Dealer Operator is the counterparty to all trades effected in ATS-6.  The Broker-Dealer Operator is a self-clearing broker and has not entered into any arrangements for clearance and settlement other than those arrangements customary for self-clearing brokers (e.g., DTC membership) and broker-to-broker settlement.

**22b. Are these arrangements the same for all Subscribers?** No

   - **Differences:** As indicated in the response to Part III, Item 22(a), settlement practices vary based upon whether a client custodies its assets at the Broker-Dealer Operator; whether the client settles on a DVP/RVP basis through a third party custodian; and whether the client is a broker-dealer.  In addition, as indicated in the response to Part III, Item 21(a), where appropriate, matches between two internal business units or trading desks of the Broker-Dealer Operator or of an affiliate are treated as journal entries (internal movements of positions and monies), do not result in a change in beneficial ownership, and therefore are not trade reported.  As indicated in Part III, Item 22(a), such journal entries do not require clearance and settlement.

**23a. Market Data Sources:**
ATS-6 uses direct exchange market data feeds (or the SIP feed for any exchange that does not make available a direct exchange market data feed) to determine the best bid and offer from all markets that display protected quotations as defined in Regulation NMS.  The best bid and offer is used, in turn, to determine the midpoint price for execution in ATS-6.  ATS-6 also uses the SIP feed for regulatory purposes (e.g., to determine whether a market is open or closed; whether a security is subject to a trading halt; and whether short sale restrictions are in effect) and for backup purposes.  The Broker-Dealer Operator uses the SIP feed as a backup when there is an issue or the perception of an issue with a market's direct feed or with the Broker-Dealer Operator's ability to receive and process the data from such market's feed.  The Broker-Dealer Operator makes such determination on a market-by-market basis.

**23b. Are these sources the same for all Subscribers?** Yes

**24a. Does the ATS aggregate Subscriber order and trading interest with that of other trading centers?** No

**25a. Did the ATS exceed the volume thresholds of Regulation ATS?** No

**26. Are order flow and execution statistics published?** No