UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
 WASHINGTON, D.C. 20549
 FORM 10-K
 ☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the fiscal
    year ended: December 31, 2021
 001-32824
(Commission file number of issuing entity)
 PPLUS TRUST SERIES RRD-1
  0001354371 (CIK number of issuing entity)
 333-116208
(Commission file number of depositor)
 MERRILL LYNCH DEPOSITOR, INC.
  0001040240 (CIK number of depositor)
 MERRILL LYNCH DEPOSITOR, INC.
  0001040240 (CIK number of sponsor)
 New York
(State or other jurisdiction of 
incorporation or organization of the issuing entity)
    
    13-3891329
(I. R. S. Employer Identification No.)
 One Bryant Park, 4th FL 
        New York, NY(Address of principal executive offices of the 
        issuing entity)
    
        10036
(Zip Code)
 
       o þ
  o þ
  þ o
 Indicate by check mark whether the  registrant  has  submitted  electronically    every Interactive  Data File  required to be submitted   pursuant to Rule 405 of Regulation  S-T
    (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required
    to submit               such files). o o
  o o þSmaller reporting  company o
      Emerging growth company o
 o
   o þ
     DOCUMENTS INCORPORATED BY REFERENCE


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TABLE OF CONTENTS
  PART I Item 1A. Risk Factors Item 1B. Unresolved Staff Comments Item 1112(b) of Regulation AB. Significant Obligors of Pool Assets (Financial Information) Item 1114(b)(2) of Regulation AB. Credit Enhancement and Other Support Except for Certain Derivatives Instruments (Information Regarding Significant Enhancement Providers) Item 1115(b) of Regulation AB. Certain Derivative Instruments (Financial Information) Item 1117 of Regulation AB. Legal Proceedings PART II Item 9B Other Information Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections PART III Item 1119 of Regulation AB. Affiliations and Certain Relationships and Related Transactions. Item 1122 of Regulation AB. Compliance with Applicable Servicing Criteria Item 1123 of Regulation AB. Servicer Compliance Statement PART IV Item 15.Exhibits, Financial Statement Schedules SIGNATURES EX-31.1: CERTIFICATION EX-33.1: REPORT ON ASSESSMENT OF COMPLIANCE WITH SERVICING CRITERIA EX-34.1: ATTESTATION REPORT EX-35.1: SERVICER COMPLIANCE STATEMENT  
 
 
 PART I
 The following items have been omitted in accordance with general instruction J to Form 10-K:
 (A)
    
    Item 1, Business.(B)
    
    Item 2, Properties.(C)
    
    Item 3, Legal Proceedings.(D)
    
        Item 4, Mine Safety Disclosures.
 Item 1A. Risk Factors THE UNDERLYING SECURITIES ISSUER HAS CEASED TO BE A REPORTING COMPANY. On March 15, 2022, R.R. Donnelly & Sons Company, the
issuer of the Underlying Securities, filed a Form 15 “A Certification and Notice of Termination of Registration Under Section
12(g) of the Securities Exchange Act of 1934 or Suspension of Duty to File Reports under Sections 13 and 15(d) of the Securities
Exchange Act of 1934”. This is the last periodic report on file with the Securities and Exchange Commission for R.R. Donnelly
& Sons Company. As a result of such event, The Bank of New York Mellon, as Trustee for the Trust was directed under Section 3.04
of the Standard Terms and the definition of Distribution Election under the Series Supplement to distribute the principal amount of
Underlying Securities pro rata to the Certificateholders. On March 29, 2022, the Trustee began making distributions of the
Underlying Securities upon presentation of the Certificates for cancellation. The Trust will terminate following the distribution of
all Underlying Securities. As of this date, the distributions are still ongoing and the Trust has not yet been terminated. For more
information regarding this matter or for how to surrender your Certificates, please see: •
  Current report on Form 8-K filed by the Depositor with the SEC on March 28, 2022. 
 Item 1B Unresolved Staff Comments
  Substitute information provided in accordance with general instruction J to Form 10-K:
 
 Item 1112(b) of Regulation AB. Significant Obligors of Pool Assets (Financial Information)
 underlying securities
issuer significant obligor SEC
  3


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Item 1114(b)(2) of Regulation AB. Credit Enhancement and Other Support, Except for Certain
Derivatives Instruments (Information Regarding Significant Enhancement Providers)
  
 Item 1115(b) of Regulation AB. Certain Derivatives Instruments (Financial Information)
  
 Item 1117 of Regulation AB. Legal Proceedings
  
 PART II
 The following items have been omitted in accordance with general instruction J to Form 10-K:
 (A)
        
        Item 5, Market for Registrants Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities.(B)
        
        Item 6, Selected Financial Data.(C)
        
        Item 7, Managements Discussion and Analysis of Financial Condition and Results of Operations.(D)
        
        Item 7A, Quantitative and Qualitative Disclosures About Market Risk.(E)
        
        Item 8, Financial Statements and Supplementary Data.(F)
        
        Item 9, Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.(G)
        
        Item 9A, Controls and Procedures.
 
 Item 9B. Other Information
  Item 9C. Disclosure Regarding Foreign Jurisdictions that Prevent Inspections
  
 PART III
 The following items have been omitted in accordance with general instruction J to Form 10-K:
 (A)
    
        Item 10, Directors, Executive Officers and Corporate Governance.(B)
    
    Item 11, Executive Compensation.(C)
    
        Item 12, Security of Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.(D)
    
        Item 13, Certain Relationships and Related Transactions, and Director Independence.(E)
    
    Item 14, Principal Accounting Fees and Services.
 Substitute information provided in accordance with general instruction J to Form 10-K:
 
 Item 1119 of Regulation AB. Affiliations and Certain Relationships and Related Transactions.
  
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Item 1122 of Regulation AB. Compliance with Applicable Servicing Criteria
 The Bank of New York Mellon (in its role as trustee) has been identified by the registrant as
participating in the servicing function with respect to the asset pool held by the PPLUS Trust
Series RRD-1 (the Servicing Party). The Servicing Party has completed a report on assessment of
compliance with the servicing criteria applicable to it (a Servicing Report), which Servicing
Report is attached as Exhibit 33.1  to this Form 10-K. The Servicing Party has provided an
attestation report (an Attestation Report) by KPMG LLP, Independent Registered Public
Accounting Firm, which report is attached as Exhibit 34.1 to this Form 10-K. While Regulation AB does not contemplate identifying noncompliance on an
individual transaction basis, the Servicing Party has confirmed to the
Registrant that no instances of noncompliance with Regulation AB were discovered
with respect to the PPLUS trust series that were part of the statistical sample
used in preparing the Servicing Report. The Servicing Party has informed the
Registrant that the Servicing Party cannot provide any assurances that had an
analysis been done of each and every transaction included in the platform
(including all PPLUS trust series forming part of the platform), that
instances of noncompliance would not have been discovered. However, the
Servicing Party has informed the Registrant that it has no reason, based on the
sampling and analysis done, to believe that there are any instances of
noncompliance with those PPLUS trust series that were not part of the sampling
procedures.
 
 Item 1123 of Regulation AB. Servicer Compliance Statement
 Compliance Statement
 
 PART IV
 
 Item 15. Exhibits, Financial Statement Schedules
 Financial Statements:
 Financial Statement Schedules:
 List of Exhibits
  3.1. Amended and Restated Certificate of Incorporation of Merrill Lynch Depositor,
Inc. (the Depositor) is set forth as Exhibit 3.1 to the
Depositors Registration Statement on Form S-3 (Registration No. 333-29015,
dated September 17, 1997) (the Registration Statement) and
is incorporated herein by reference.
 3.2. By-laws of the Depositor are set forth as Exhibit 3.2 to the Registration Statement and are incorporated herein by reference.
 4.1. Standard Terms for Trust Agreements dated November 5, 2004 (the Standard Terms) are set forth as Exhibit 4 to the Form 8-A (No. 001-32364) filed by the Depositor with the SEC on November 24, 2004 and is incorporated herein by reference.
 4.2. Series Supplement between Merrill Lynch Depositor, Inc., as Depositor, and The Bank of New York Mellon, as Trustee and Securities Intermediary, dated as of March 2, 2006, is set forth as Exhibit 4.2 to the Form 8-K filed by the registrant with the SEC on March 3, 2006 and is incorporated herein by reference.
 31.1. Certification of the President of Registrant dated March 30, 2022, pursuant to Rules 13a-14 and 15d-14 under the Securities Exchange Act of 1934, as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002, with respect to the Registrants Annual Report on Form 10-K for the year ended December 31, 2021.
 33.1. Report on Assessment of
    Compliance with Servicing Criteria of The Bank of New York Mellon dated February 28, 2022.
 34.1. Attestation Report on
    Assessment of Compliance with Servicing Criteria of KPMG LLP, on behalf of The Bank of New York Mellon dated February 28, 2022.
 35.1. Servicer
    Compliance Statement of The Bank of New York Mellon dated February 11, 2022.
 (b)
    
    Exhibits
  (c)
    
    Financial Statement Schedules
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SIGNATURES
  MERRILL LYNCH DEPOSITOR, INC.Date: March 30, 2022
    By:

      /s/ Matthew J. NelsonName:
      Matthew J. NelsonTitle:
      President 6


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