# EDGAR Filing Document

**Accession Number:** 0001927003
**File Stem:** 0001628280-25-044535
**Filing Date:** 2025-10
**Character Count:** 7236
**Document Hash:** 96de402f1bbc53dabe3fe2921fdee3e5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001628280-25-044535.hdr.sgml**: 20251007

**ACCESSION NUMBER**: 0001628280-25-044535

**CONFORMED SUBMISSION TYPE**: 5

**PUBLIC DOCUMENT COUNT**: 3

**CONFORMED PERIOD OF REPORT**: 20250831

**FILED AS OF DATE**: 20251007

**DATE AS OF CHANGE**: 20251007

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Costigan John
- **CENTRAL INDEX KEY:** 0001927003

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 5
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-11869
- **FILM NUMBER:** 251380775

**MAIL ADDRESS:**
- **STREET 1:** FACTSET RESEARCH SYSTEMS
- **STREET 2:** 45 GLOVER AVENUE
- **CITY:** NORWALK
- **STATE:** CT
- **ZIP:** 06850
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FACTSET RESEARCH SYSTEMS INC
- **CENTRAL INDEX KEY:** 0001013237
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-COMPUTER PROGRAMMING, DATA PROCESSING, ETC. [7370]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 133362547
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0831

**BUSINESS ADDRESS:**
- **STREET 1:** 45 GLOVER AVENUE
- **CITY:** NORWALK
- **STATE:** CT
- **ZIP:** 06850
- **BUSINESS PHONE:** 2038101000

**MAIL ADDRESS:**
- **STREET 1:** 45 GLOVER AVENUE
- **CITY:** NORWALK
- **STATE:** CT
- **ZIP:** 06850

## Exhibit 24.1

![](johncostiganpoa001.jpg)

POWER OF ATTORNEY KNOW ALL PEOPLE BY THESE PRESENTS, that the undersigned, John Costigan (the "Filer"), an individual subject to the filing requirements of Section 16 of the Securities Act of 1934, as amended (the "Act"), does hereby constitute and appoint any of Helen Shan, Christopher McLoughlin, Winnifred Lewis, Jill Chavarria and Debra Quas, as Filer's true and lawful attorney-in-fact and in Filer's name, place and stead, to execute and deliver, and to take such other action as the attorney considers necessary or appropriate to effect, any filing on Form 3, Form 4, or Form 5 to be filed under Section 16 of the Act. IN WITNESS WHEREOF, the undersigned has executed this Power of Attorney on this 19th day of August 2025. /s/ John Costigan Signature John Costigan Printed Name

------

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## FORM 5

### STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

[ ] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

[ ] Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

---

| | | |
|:---|:---|:---|
| **1. Name and Address of Reporting Person**<sup>*</sup><br>Costigan John<br><sub>(Last) (First) (Middle)</sub><br>FACTSET RESEARCH SYSTEMS INC.<br>45 GLOVER AVENUE<br><sub>(Street)</sub><br>NORWALK, CT 06850<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2025-08-31 | **5. Relationship of Reporting Person(s) to Issuer**<br>(Check all applicable)<br>[ ] Director [ ] 10% Owner<br>[X] Officer (give title below) [ ] Other (specify below)<br>_Chief Data Officer_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>FACTSET RESEARCH SYSTEMS INC [ FDS ] | **4. If Amendment, Date of Original Filed (Month/Day/Year)**<br>  | **6. Individual or Joint/Group Filing (Check Applicable Line)**<br>[X] Form filed by One Reporting Person<br>[ ] Form filed by More than One Reporting Person |

---

## Table I - Non-Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | 3. Transaction Code (V) | 3. Transaction Code (V) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 4. Securities Acquired (A) or Disposed of (D) | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| 1. Title of Security | 2. Transaction Date | 2A. Deemed Execution Date | Code | V | Amount | (A) or (D) | Price | 5. Amount of Securities Beneficially Owned | 6. Ownership Form | 7. Nature of Indirect Beneficial Ownership |
| Common Stock | 2024-09-19 |  | J |  | 0.66<sup>(1)</sup> | A | $469.48 | 299.6015 | D |  |
| Common Stock | 2024-11-29 |  | J |  | 2.73<sup>(2)</sup> | A | $362.65 | 302.3315 | D |  |
| Common Stock | 2024-12-19 |  | J |  | 0.64<sup>(1)</sup> | A | $489.73 | 302.9715 | D |  |
| Common Stock | 2025-02-28 |  | J |  | 2.95<sup>(2)</sup> | A | $392.48 | 305.9215 | D |  |
| Common Stock | 2025-03-20 |  | J |  | 0.74<sup>(1)</sup> | A | $430.93 | 306.6615 | D |  |
| Common Stock | 2025-05-30 |  | J |  | 11.04<sup>(2)</sup> | A | $389.38 | 317.7015 | D |  |
| Common Stock | 2025-06-18 |  | J |  | 0.82<sup>(1)</sup> | A | $425.04 | 318.5215 | D |  |

---

## Table II - Derivative Securities

---

|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | 4. Transaction Code (V) | 4. Transaction Code (V) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 5. Number of Derivative Securities Acquired (A) or Disposed of (D) | 6. Date Exercisable and Expiration Date | 6. Date Exercisable and Expiration Date | 7. Title and Amount of Underlying Securities | 7. Title and Amount of Underlying Securities | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
| 1. Title of Derivative Security | 2. Conversion or Exercise Price | 3. Transaction Date | 3A. Deemed Execution Date | Code | V | (A) | (D) | Date Exercisable | Expiration Date | Title | Amount or Number of Shares | 8. Price of Derivative Security | 9. Number of Derivative Securities Beneficially Owned | 10. Ownership Form | 11. Nature of Indirect Beneficial Ownership |
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

---

### Footnotes:

(1) Shares acquired through dividend reinvestment purchases under the FactSet Research Systems Inc. Employee Stock Purchase Plan.

(2) Reflects the acquisition of shares pursuant to the FactSet Research Systems Inc. Employee Stock Purchase Plan.

**Signature:** /s/ WINNIFRED LEWIS, Attorney in Fact for John Costigan  
**Date:** 2025-10-07

### Remarks:

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.

**Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.**