# EDGAR Filing Document

**Accession Number:** 0001834221
**File Stem:** 0001834221-26-000003
**Filing Date:** 2026-4
**Character Count:** 8364
**Document Hash:** 6b5e89261e5d076107f5360e8c8eda3d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001834221-26-000003.hdr.sgml**: 20260403

**ACCESSION NUMBER**: 0001834221-26-000003

**CONFORMED SUBMISSION TYPE**: 4

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260401

**FILED AS OF DATE**: 20260403

**DATE AS OF CHANGE**: 20260403

**REPORTING-OWNER**: 

**OWNER DATA:**
- **COMPANY CONFORMED NAME:** Aspbury Robert
- **CENTRAL INDEX KEY:** 0001834221

**ORGANIZATION NAME:**

**FILING VALUES:**
- **FORM TYPE:** 4
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39799
- **FILM NUMBER:** 26838130

**MAIL ADDRESS:**
- **STREET 1:** C/O CERTARA, INC.
- **STREET 2:** 4 RADNOR CORPORATE CENTER, SUITE 350
- **CITY:** RADNOR
- **STATE:** PA
- **ZIP:** 19087
**ISSUER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Certara, Inc.
- **CENTRAL INDEX KEY:** 0001827090
- **STANDARD INDUSTRIAL CLASSIFICATION:** SERVICES-PREPACKAGED SOFTWARE [7372]
- **ORGANIZATION NAME:** 06 Technology
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**BUSINESS ADDRESS:**
- **STREET 1:** 4 RADNOR CORPORATE CENTER, SUITE 350
- **CITY:** RADNOR
- **STATE:** PA
- **ZIP:** 19087
- **BUSINESS PHONE:** (415) 237-8272

**MAIL ADDRESS:**
- **STREET 1:** 4 RADNOR CORPORATE CENTER, SUITE 350
- **CITY:** RADNOR
- **STATE:** PA
- **ZIP:** 19087

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

## FORM 4

### 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>Aspbury Robert<br><sub>(Last) (First) (Middle)</sub><br>C/O CERRTARA, INC.<br>4 RADNOR CORPORATE CENTER, SUITE 350<br><sub>(Street)</sub><br>RADNOR, PA 19087<br><sub>(City) (State) (Zip)</sub> | **3. Date of Earliest Transaction (Month/Day/Year)**<br>2026-04-01 | **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>_PRESIDENT, PREDICTIVE  TECH_ |
| **2. Issuer Name and Ticker or Trading Symbol**<br>Certara, Inc. [ CERT ] | **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 | 2026-04-01 |  | A |  | 14510 | A | 0<sup>(1)</sup> | 321686 | D |  |
| Common Stock | 2026-04-01 |  | F |  | 6821<sup>(2)</sup> | D | 5.70<sup>(1)</sup> | 314865 | D |  |
| Common Stock | 2026-04-01 |  | M |  | 7852 | A | 0<sup>(3)</sup> | 322717 | D |  |
| Common Stock | 2026-04-01 |  | F |  | 3691<sup>(2)</sup> | D | 5.70<sup>(3)</sup> | 319026 | D |  |
| Common Stock | 2026-04-01 |  | M |  | 10127 | A | 0<sup>(4)</sup> | 329153 | D |  |
| Common Stock | 2026-04-01 |  | F |  | 4760<sup>(2)</sup> | D | 5.70<sup>(4)</sup> | 324393 | D |  |
| Common Stock | 2026-04-01 |  | M |  | 15188<sup>(5)</sup> | A | $0 | 339581 | D |  |
| Common Stock | 2026-04-01 |  | F |  | 7139<sup>(2)</sup> | D | 5.70<sup>(5)</sup> | 332442 | 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 |
| Restricted Stock Units | <sup>(3)</sup> | 2026-04-01 |  | M |  |  | 7852 | <sup>(3)</sup> | 2026-04-01 | Common Stock | 7852 | $0 | 0 | D |  |
| Restricted Stock Units | <sup>(4)</sup> | 2026-04-01 |  | M |  |  | 10127 | <sup>(4)</sup> | 2027-04-01 | Common Stock | 10127 | $0 | 10127 | D |  |
| Restricted Stock Units | <sup>(5)</sup> | 2026-04-01 |  | M |  |  | 15188 | <sup>(5)</sup> | 2028-04-01 | Common Stock | 15188 | $0 | 30378 | D |  |

---

### Footnotes:

(1) Each performance stock unit ("PSU") was granted on April 1, 2023, under the Certara, Inc. ("Certara") 2020 Incentive Plan (the "2020 Incentive Plan") and represents a right to receive one share of common stock. The PSUs were subject to the achievement of certain performance objectives over a three-year period from January 1, 2023, to December 31, 2025. The PSUs were vested and settled on April 1, 2026.

(2) Represents shares of Certara withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units ("RSUs") and PSUs described in footnotes 1, 3, 4, and 5, exempt under Rule 16b-3.

(3) Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2024. One-third of the RSUs vested and were settled on April 1, 2025. The remaining one-third of the RSUs vested and settled on April 1, 2026.

(4) Each RSU was granted on April 1, 2024, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2025. One-third of the RSUs vested and were settled on April 1, 2026.  The remaining one-third of the RSUs will vest and settle on April 1, 2027.

(5) Each restricted stock unit was granted on May 20, 2025, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2026.  The remaining two-thirds of the RSUs will vest and settle in equal parts on April 1, 2027 and April 1, 2028.

**Signature:** Daniel Corcoran, as Attorney-in-Fact for Robert Aspbury  
**Date:** 2026-04-03

### 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.**