40-17G - ADAMS DIVERSIFIED EQUITY FUND, INC.

Form 40-17G - Fidelity Bond [Rule 17G-1(g)]: SEC Accession No. 0001104659-26-043208

Filing Date: 2026-04-14

Accepted: 2026-04-14 16:24:38

Documents: 1

Effectiveness Date: 2026-04-14

ADAMS DIVERSIFIED EQUITY FUND, INC. (Filer) CIK : 0000002230 (see all company filings) EIN. : 134912740 | State of Incorp.: MD | Fiscal Year End: 1231 Type: 40-17G | Act: 40 | File No.: 811-00248 | Film No.: 26861095

1 | 40-17G | tm2611814d1_4017g.pdf | 40-17G

500 East Pratt Street, Suite 1300, Baltimore, MD 21202 │ 410.752.5900 │ 800.638.2479 │ adamsfunds.com April 14, 2026 Securities and Exchange Commission 100 F Street, N.E. Washington, D.C. 20549 Attention: Division of Investment Management Re: Rule 17g-1 filing for Adams Diversified Equity Fund, Inc. (File No. 811-00248) Dear Sir or Madam: We are filing electronically herewith, pursuant to Rule 17g-1 under the Investment Company Act of 1940, as amended (the "1940 Act"), the following items with respect to the joint insured Investment Company Bond (“Bond”) covering Adams Diversified Equity Fund, Inc. ("ADX") and Adams Natural Resources Fund, Inc. ("PEO"): 1. A copy of Financial Institution Investment Company Asset Protection Bond No. J05995322, showing coverage of $2,800,000 effective for the coverage period from February 25, 2026 to February 25, 2027; and 2. A certified copy of resolutions adopted by a majority of the members of the Board of Directors of ADX who are not "interested persons" (as defined in the 1940 Act), approving the amount, type, form and coverage of the bond and the portion of the premium to be paid by ADX. Were it not to hold a joint insured bond with PEO, ADX would be required to maintain a fidelity bond in the amount of $1,900,000. A copy of the current agreement entered into by ADX and PEO pursuant to Rule 17g-1(f) under the 1940 Act is also attached. Very truly yours, Adams Diversified Equity Fund, Inc. By: /s/ Janis F. Kerns Janis F. Kerns Vice President, General Counsel and Secretary

Form 26-10-0426 (Ed. 2/98) PREMIUM BILL Date: April 1, 2026 Insured: ADAMS DIVERSIFIED EQUITY FUND, INC. Producer: VANBRIDGE 1140 AVENUE OF THE AMERICAS 8TH FL NEW YORK, NY 10036 Company: Federal Insurance Company THIS BILLING IS TO BE ATTACHED TO AND FORM A PART OF THE POLICY REFERENCED BELOW. Policy Number: J05995322 Policy Period: 02-25-2026 to 02-25-2027 NOTE: PLEASE RETURN THIS BILL WITH REMITTANCE AND NOTE HEREON ANY CHANGES. BILL WILL BE RECEIPTED AND RETURNED TO YOU PROMPTLY UPON REQUEST. PLEASE REMIT TO PRODUCER INDICATED ABOVE. PLEASE REFER TO J05995322 Product Effective Date Premium Financial Institution Bond for Investment Companies 02-25-2026 $6,172.00 TOTAL POLICY PREMIUM $6,172.00 WHEN REMITTING PLEASE INDICATE POLICY OR CERTIFICATE NUMBER

Financial Institution Bond For Investment Companies PF-52903D (08/21) Page 1 of 2 DECLARATIONS Name of Assured : ADAMS DIVERSIFIED EQUITY FUND, INC. Address of Assured: 500 EAST PRATT STREET, SUITE 1300 BALTIMORE, MD 21202 FEDERAL INSURANCE COMPANY Incorporated under the laws of Indiana, a stock insurance company, herein called the Company One American Square 202 N Illinois Street, Suite 2600 Indianapolis, IN 46282 Bond Number: J05995322 Item 1. Bond Period: From: February 25, 2026 To: February 25, 2027 At 12:01 A.M. local time at the Address of Assured. Item 2. Single Loss Limits Of Liability – Deductible Amounts: Insuring Clause Single Loss Limit Of Liability Deductible Amount 1. Employee $2,800,000 $0 2. On Premises $2,800,000 $5,000 3. In Transit $2,800,000 $5,000 4. Forgery Or Alteration $2,800,000 $5,000 5. Extended Forgery $2,800,000 $5,000 6. Counterfeit Money $2,800,000 $5,000 7. Computer System Fraud $2,800,000 $5,000 8. Claims Expense Not Covered Not Covered 9. Audit Expense $50,000 $0 10. Uncollectible Items Of Deposit $2,800,000 $5,000 11. Voice Initiated Funds Transfer Instruction $2,800,000 $5,000

Financial Institution Bond For Investment Companies PF-52903D (08/21) Page 2 of 2 IN WITNESS WHEREOF, the Company has caused this Bond to be signed by its Authorized Officers, but it shall not be valid unless also signed by a duly authorized representative of the Company. FEDERAL INSURANCE COMPANY Secretary President April 1, 2026 Date Authorized Representative

Important Notice 14-02-12160 (08/19) Page 1 of 1 The SEC Requires Proof of Your Fidelity Insurance Policy Your company is now required to file an electronic copy of your fidelity insurance coverage (Chubb’s ICAP Bond policy) to the Securities and Exchange Commission (SEC), according to rules adopted by the SEC on June 12, 2006. Chubb is in the process of providing your agent/broker with an electronic copy of your insurance policy as well as instructions on how to submit this proof of fidelity insurance coverage to the SEC. You can expect to receive this information from your agent/broker shortly. The electronic copy of your policy is provided by Chubb solely as a convenience and does not affect the terms and conditions of coverage as set forth in the paper policy you receive by mail. The terms and conditions of the policy mailed to you, which are the same as those set forth in the electronic copy, constitute the entire agreement between your company and Chubb. If you have any questions, please contact your agent or broker.

14-02-23030 (05/2018) Page 1 of 2 Notice of Loss Control Services Insuring Company: Federal Insurance Company As a Chubb policyholder, you have loss prevention information and/or services available to you, as listed in this Notice. You may order any brochure by email to formsordering@chubb.com and to view our full suite of loss prevention brochures/services go to www.chubb.com/us/fl-lossprevention Directors and Officers (D&O) Liability Loss Prevention Services • Directors and Officers Liability Loss Prevention Manuals: Directors and Officers Liability Loss Preventions – #14-01-0035 Directors and Officers Securities Litigation Loss Preventions – #14-01-0448 Director Liability Loss Prevention in Mergers and Acquisitions – #14-01-1099 Directors and Officers Liability Loss Prevention for Not-for-Profit- -#14-01-0036 Cyber Loss Mitigation for Directors -#14-01-1199 Employment Practices Liability (EPL) Loss Prevention Services • Toll-free Hot Line Have a question on how to handle an employment situation? Simply call 1.888.249.8425 to access the nationally known employment law firm of Jackson Lewis P.C. We offer customers an unlimited number of calls to the hot line at no additional charge. • ChubbWorks.com ChubbWorks.com is a web-based platform that offers multiple services including overviews of employment laws, sample employment policies and procedures, and on-line training. To gain immediate access to ChubbWorks go to www.chubbworks.com and register using your policy number. • Employment Practices Loss Prevention Guidelines Manual Employment Practices Loss Prevention Guidelines - #14-01-0061 • Loss Prevention Consultant Services Chubb has developed a network of more than 120 law firms, human resources consulting firms, and labor economist/statistical firms that offer specialized services for employment issues. • Public Company EPL Customers Employment Practices Loss Prevention Guidelines – Written by Seyfarth Shaw exclusively for Chubb this manual provides an overview of key employment issues faced by for-profit companies and offers proactive idea for avoiding employment lawsuits. • Private Company EPL Customers Employment Practices Loss Prevention Guidelines – Written by Seyfarth Shaw exclusively for Chubb this manual provides an overview of key employment issues for –profit companies and offers proactive idea for avoiding employment lawsuits.

14-02-23030 (05/2018) Page 2 of 2 Fiduciary Liability Loss Prevention Services • Fiduciary Liability Loss Prevention Manual Who May Sue You and Why: How to Reduce Your ERISA Risks and the Role of Fiduciary Liability Insurance #14-01-1019 Crime Loss Prevention Services • Crime/Kidnap, Ransom & Extortion Loss Prevention Manual Preventing Fraud: How Anonymous Hotlines Can Help #14-01-1090 Cyber Security Loss Prevention Services Visit: https://www2.chubb.com/us-en/business-insurance/cyber-security.aspx to learn more about Chubb’s Cyber Services for our policyholders. Health Care Directors and Officers (D&O) Liability Loss Prevention Services • Readings in Health Care Governance Manual Readings in Health Care Governance -#14-01-0788 • ChubbWorks.com ChubbWorks.com for Health Care Organizations – The Health Care Zone is a free online resource containing health care specific loss prevention information for employment practices liability, directors and officers (D&O) liability, and fiduciary liability exposures. To gain immediate access to ChubbWorks go to www.chubbworks.com and register using your policy number. • Health Care D&O Loss Prevention Consultant Services Health Care D& O Loss Prevention Consultant Services- #14-01-1164 -------------------- The services provided are advisory in nature. While this program is offered as a resource in developing or maintaining a loss prevention program, you should consult competent legal counsel to design and implement your own program. No liability is assumed by reason of the services, access or information provided. All services are subject to change without notice.

ALL-20887a (09/19) Chubb Producer Compensation Practices & Policies Chubb believes that policyholders should have access to information about Chubb's practices and policies related to the payment of compensation to brokers and independent agents. You can obtain that information by accessing our website at http://www.chubbproducercompensation.com or by calling the following toll-free telephone number: 1-866-512-2862.

Trade or Economic Sanctions Notice ALL-21101 (09/19) Page 1 of 1 TRADE OR ECONOMIC SANCTIONS NOTICE This insurance does not apply to the extent that trade or economic sanctions or other laws or regulations prohibit us from providing insurance, including, but not limited to, the payment of claims. All other terms and conditions of the policy remain unchanged.

IMPORTANT NOTICE TO POLICYHOLDERS ALL-317454 (03/21) Page 1 of 1 HAVE YOU BEEN TRICKED INTO WIRE FRAUD? TAKE IMMEDIATE ACTION! If you believe you have transferred funds to a criminal posing as a legitimate business associate, you should act quickly: 1. Immediately contact the originating bank and request a recall of the wire transfer and confirm that recall in writing. 2. Immediately file a complaint with the FBI at www.ic3.gov. This reporting triggers the FBI’s Recovery Asset Team and the FBI’s assistance seeking return of the wire transfer. 3. Preserve records of the incident, including emails sent and received in their original electronic state. Correspondence and forensic information contained in these electronic files help investigators shed light on the perpetrator(s), and parties responsible for the incident. 4. Once the above steps are complete, contact Chubb per the instructions in your policy. While neither recalling the wire transfer nor reporting to the FBI guarantees the return of your funds, these steps maximize the opportunity to mitigate your loss, assist the FBI in tracing the funds and help establish any insurance claim. Simple Steps to Prevent Fraudulently Induced Wire Transfers Email communication is efficient, but it is not a secure method of communication. Regardless of your familiarity with a contact, that contact’s email may be intercepted, altered and fabricated. You may reduce the chances of fraud by following these best practices: 1. Verify Email Requests by Telephone: Require those responsible for paying invoices or changing bank routing information to verify payment details over the phone, rather than by email or documents sent electronically. Making a phone call to a known, pre-existing telephone number remains the single best protection against fraud. 2. Segregate Wire Transfer Responsibilities: Establish a standing policy that requires at least three people to review and approve wire transfer requests, pay an invoice or change a business partner’s bank account information. Such requests should be entered by the initiator of the wire and verified by two independent signatories. 3. Turn on MFA for Cloud Email: Multifactor Authentication is available from all major email providers. It provides a layer of security to email accounts beyond a user’s account name and password, making it harder for c