SEC ownership of Certara, Inc.

Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001827090.

Comparable stake leader

ARSENAL CAPITAL PARTNERS III LP

Disclosed value leader

ARSENAL CAPITAL PARTNERS III LP

Comparable rows

50/50

Latest evidence

14 May 2026

Top shareholders Insider holders Latest transactions

Public ticker: CERT on Nasdaq
Parsed ownership sources: 13D/G, 13F, and 3/4/5
Largest SEC-reported holder: ARSENAL CAPITAL PARTNERS III LP
Latest 13D/G holder: ARSENAL CAPITAL PARTNERS III LP
Latest parsed ownership date: 14 May 2026
Issuer CIK: 0001827090
Issuer location: Radnor, PA

Ownership snapshot

Top shareholders of Certara, Inc. (13F + 13D/G + 3/4/5)

Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.

Comparable stake leader

ARSENAL CAPITAL PARTNERS ...

Disclosed value leader

ARSENAL CAPITAL PARTNERS ...

Comparable rows

50/50

Latest evidence

14 May 2026

13D/G 13F 3/4/5 Lead comparable stake: 23% 13D/G row: ARSENAL CAPITAL PARTNERS III LP Showing 1-8 of 50 holder rows.

Quick read

ARSENAL CAPITAL PARTNERS III LP leads the comparable SEC ownership view at 23%.

50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.

Open SEC evidence Opens ARSENAL CAPITAL PARTNERS III LP's linked filing trail.

Comparable ownership Top 5

ARSENAL CAPITAL PARTNERS III LP 23%

DIMENSIONAL FUND ADVISORS LP 5.2%

James E. Flynn 4.9%

WASATCH ADVISORS LP 3.3%

Cynthia Collins 0.03%

Ownership % is shown only when SEC disclosures are safely comparable across share classes.

Detailed SEC evidence table Showing 1-8 of 50 holder rows

Holder	Evidence	Ownership %	Position	12M Net Δ	As of
ARSENAL CAPITAL PARTNERS III LP	13D/G Terry M. Mullen 13D/G	23%	$504,843,648 36,345,835 shares	$0	14 Apr 2025
DIMENSIONAL FUND ADVISORS LP	13D/G 13F Company 13D/G 13F	5.2%	$102,064,874 8,352,281 shares	$0	30 Sep 2025
James E. Flynn	13D/G Deerfield Mgmt, L.P. 13D/G	4.9%	$88,705,753 7,808,605 shares	-$25,019,207	25 Nov 2025
WASATCH ADVISORS LP	13D/G 13F Company 13D/G 13F	3.3%	$38,170,482 5,272,166 shares	-$87,793,478	31 Mar 2026
Cynthia Collins	3/4/5 Director 3/4/5	0.03%	$507,483 51,846 shares mixed-class rows	—	14 May 2026
Rosemary A. Crane	3/4/5 Director 3/4/5	0.03%	$472,291 45,672 shares mixed-class rows	—	14 May 2026
BlackRock, Inc.	13F Company 13F	9%	$81,554,906 14,307,878 shares	—	31 Mar 2026
DEERFIELD MANAGEMENT COMPANY, L.P.	13F Company 13F	4.9%	$44,509,049 7,808,605 shares	—	31 Mar 2026

How to read this table

Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Forms 3/4/5 flow

Insider trading overview

Net insider flow leans to selling over the last 12 months. Net value: -$359,366.

Buys

$200,000

Insiders: 1

Sells

$559,366

Insiders: 1

Net

-$359,366

Shares: -27,128

Window

Last 12 months

4 rolling buckets

Buy value Sell value

Shares: 24,096 Shares: 51,224

Window (months)	Buy shares	Sell shares	Buy value	Sell value	Net value
0-3	0	0	$0	$0	$0
3-6	0	0	$0	$0	$0
6-9	24,096	0	$200,000	$0	+$200,000
9-12	0	51,224	$0	$559,366	-$559,366

Reporting owners

Insider holders from Forms 3/4/5

Showing 1-20 of 31 reporting-owner rows connected to Certara, Inc.. Open a relationship link for the CIK-to-CIK filing trail.

Rows

Largest Forms 3/4/5 holder

ARSENAL CAPITAL INVESTMENT VI LP

Net 12M change

-$359,366

Latest report

01 Jun 2026

Name	Relationship	Holdings Value	Past Year Net Change	Change %	Valuation	Report Date
ARSENAL CAPITAL INVESTMENT VI LP	10%+ Owner	$654,225,030			Mixed	08 Dec 2022
William F. Feehery	CHIEF EXECUTIVE OFFICER, Director	$20,511,927	+$200,000	+0.98%	Mixed	11 Nov 2025
Mason P. Slaine	Director	$11,885,796			Mixed	14 Nov 2022
Sherilyn S. McCoy	Director	$11,180,574			Mixed	18 May 2021
Michael Andrew Schemick	Chief Financial Officer	$9,887,790			Mixed	31 Mar 2023
Justin P. Edge	Pres., Regulatory & Access	$7,569,541			Mixed	01 Apr 2022
Craig R. Rayner	President, Integrated Drug Dev	$5,688,180			Mixed	02 Sep 2021
Jieun W. Choe	Chief Strategy & Marketing	$4,759,787			Mixed	01 Apr 2022
Richard M. Traynor	Svp And General Counsel	$3,361,021			Mixed	01 Apr 2024
Robert Aspbury	President, Predictive Tech	$3,129,329			Mixed	11 May 2026
James E. Cashman III	Director, Chairman	$2,971,883			Mixed	14 May 2026
Matthew M. Walsh	Director	$1,427,862			Mixed	14 May 2026
Leif E. Pedersen	President, Chief Commercal Off	$1,170,011	-$559,366	-32%	Mixed	11 May 2026
John E. Gallagher	Chief Financial Officer	$1,140,990			Mixed	11 May 2026
Stephen M. McLean	Director	$756,000			Mixed	19 Aug 2022
Patrick F. Smith	President, Drug Dev Solutions	$713,985			Mixed	07 Oct 2024
Daniel Corcoran	SVP and General Counsel	$711,799			Mixed	01 Jun 2026
Nicolette D. Sherman	Chief Human Resources Officer	$707,118			Mixed	01 Apr 2024
Drayton Virkler	President, Reg & Acces	$644,651			Mixed	31 Mar 2023
Nancy Killefer	Director	$507,483			Mixed	14 May 2026

Recent insider transactions for Certara, Inc.

Showing up to 300 recent insider transactions from the last 12 months.

Insider	Symbol	Class	Transaction	%	Shares	Shares owned	Date	Ownership
Rona Anhalt	CERT	Common Stock	Tax liability	-11.8%	-2,241	16,789	01 Jun 2026	Direct
Rona Anhalt	CERT	Common Stock	Options Exercise	60.1%	7,147	19,030	01 Jun 2026	Direct
Rona Anhalt	CERT	Restricted Stock Units	Options Exercise	-50%	-7,147	7,147	01 Jun 2026	Direct
Daniel Corcoran	CERT	Common Stock	Tax liability	-32.6%	-12,103	25,050	01 Jun 2026	Direct
Daniel Corcoran	CERT	Common Stock	Options Exercise	133.4%	22,830	39,939	01 Jun 2026	Direct
Daniel Corcoran	CERT	Restricted Stock Units	Options Exercise	-100%	-22,830	0	01 Jun 2026	Direct
Cynthia Collins	CERT	Common Stock	Options Exercise	43.7%	15,757	51,846	14 May 2026	Direct
Cynthia Collins	CERT	Restricted Stock Units	Options Exercise	-100%	-15,757	0	14 May 2026	Direct
John V W. Reynders	CERT	Common Stock	Options Exercise	147.1%	15,757	26,466	14 May 2026	Direct
John V W. Reynders	CERT	Restricted Stock Units	Award		33,222	33,222	14 May 2026	Direct
John V W. Reynders	CERT	Restricted Stock Units	Options Exercise	-100%	-15,757	0	14 May 2026	Direct
Eran Broshy	CERT	Common Stock	Options Exercise	45.1%	15,757	50,708	14 May 2026	Direct
Eran Broshy	CERT	Restricted Stock Units	Award		33,222	33,222	14 May 2026	Direct
Eran Broshy	CERT	Restricted Stock Units	Options Exercise	-100%	-15,757	0	14 May 2026	Direct
Arjun Bedi	CERT	Common Stock	Options Exercise		5,547	5,547	14 May 2026	Direct
Arjun Bedi	CERT	Restricted Stock Units	Award		33,222	33,222	14 May 2026	Direct
Arjun Bedi	CERT	Restricted Stock Units	Options Exercise	-100%	-5,547	0	14 May 2026	Direct
James E. Cashman III	CERT	Common Stock	Options Exercise	3.36%	15,757	484,197	14 May 2026	Direct
James E. Cashman III	CERT	Restricted Stock Units	Award		33,222	33,222	14 May 2026	Direct
James E. Cashman III	CERT	Restricted Stock Units	Options Exercise	-100%	-15,757	0	14 May 2026	Direct
Nancy Killefer	CERT	Common Stock	Options Exercise	43.7%	15,757	51,846	14 May 2026	Direct
Nancy Killefer	CERT	Restricted Stock Units	Award		33,222	33,222	14 May 2026	Direct
Nancy Killefer	CERT	Restricted Stock Units	Options Exercise	-100%	-15,757	0	14 May 2026	Direct
Rosemary A. Crane	CERT	Common Stock	Options Exercise	52.7%	15,757	45,672	14 May 2026	Direct
Rosemary A. Crane	CERT	Restricted Stock Units	Options Exercise	-100%	-15,757	0	14 May 2026	Direct
Matthew M. Walsh	CERT	Common Stock	Options Exercise	7.98%	15,757	213,316	14 May 2026	Direct
Matthew M. Walsh	CERT	Restricted Stock Units	Award		33,222	33,222	14 May 2026	Direct
Matthew M. Walsh	CERT	Restricted Stock Units	Options Exercise	-100%	-15,757	0	14 May 2026	Direct
Robert Aspbury	CERT	Restricted Stock Units	Award		333,332	246,913	11 May 2026	Direct
Robert Aspbury	CERT	Performance Stock Units	Award		197,977	129,629	11 May 2026	Direct
Robert Aspbury	CERT	Performance Stock Units	Disposed to Issuer	-100%	-68,348	0	11 May 2026	Direct
Leif E. Pedersen	CERT	Restricted Stock Units	Award		74,074	74,074	11 May 2026	Direct
Leif E. Pedersen	CERT	Performance Stock Units	Award		179,459	111,111	11 May 2026	Direct
Leif E. Pedersen	CERT	Performance Stock Units	Disposed to Issuer	-100%	-68,348	0	11 May 2026	Direct
Rona Anhalt	CERT	Restricted Stock Units	Award		61,728	61,728	11 May 2026	Direct
Rona Anhalt	CERT	Performance Stock Units	Award		136,530	92,592	11 May 2026	Direct
Rona Anhalt	CERT	Performance Stock Units	Disposed to Issuer	-100%	-43,938	0	11 May 2026	Direct
Jon Matthew Resnick	CERT	Common Stock	Tax liability	-40.8%	-24,377	35,389	11 May 2026	Direct
Jon Matthew Resnick	CERT	Common Stock	Options Exercise		59,766	59,766	11 May 2026	Direct
Jon Matthew Resnick	CERT	Restricted Stock Units	Options Exercise	-33.3%	-59,766	119,533	11 May 2026	Direct
Jon Matthew Resnick	CERT	Restricted Stock Units	Award		1,401,531	728,405	11 May 2026	Direct
Jon Matthew Resnick	CERT	Performance Stock Units	Award		1,009,689	740,740	11 May 2026	Direct
Daniel D. Corcoran	CERT	Restricted Stock Units	Award		74,074	74,074	11 May 2026	Direct
Daniel D. Corcoran	CERT	Performance Stock Units	Award		159,931	111,111	11 May 2026	Direct
Daniel D. Corcoran	CERT	Performance Stock Units	Disposed to Issuer	-100%	-48,820	0	11 May 2026	Direct
John E. Gallagher	CERT	Restricted Stock Units	Award		129,629	129,629	11 May 2026	Direct
John E. Gallagher	CERT	Performance Stock Units	Award		296,966	194,444	11 May 2026	Direct
John E. Gallagher	CERT	Performance Stock Units	Disposed to Issuer	-100%	-102,522	0	11 May 2026	Direct
Leif E. Pedersen	CERT	Common Stock	Options Exercise	41.2%	33,167	113,744	01 Apr 2026	Direct
Leif E. Pedersen	CERT	Common Stock	Tax liability	-12%	-11,611	84,955	01 Apr 2026	Direct

^* marks a reported price that did not pass the local price check.