Insider Transactions Reported by 31 Insiders of Certara, Inc.

Symbol: CERT on Nasdaq
Location: Radnor, PA

Quick Takeaways

CERT - Certara, Inc. has 31 insiders with reported activity on this page.
Net insider value flow over the last year: -$359,366.
Recent transaction rows are available for direct filing-level review.

What Changed

Buy value: $200,000; sell value: $559,366.
Net share flow: -27,128.

Why This Matters

This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.

Source Evidence

Filed on Form 4

Issuer insider activity is sourced from SEC Forms 3, 4, and 5.

See Original Filing

Insider trading overview

Last 12 months

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

Buys

$200,000

Shares: 24,096

Insiders: 1

Sells

$559,366

Shares: 51,224

Insiders: 1

Net

-$359,366

Shares: -27,128

Insiders: 0

Window (months)	Buy shares	Sell shares	Buy $	Sell $	Net $
0-3	0	0	$0	$0	$0
3-6	0	0	$0	$0	$0
6-9	24,096	51,224	$200,000	$559,366	-$359,366
9-12	0	0	$0	$0	$0

Certara, Inc. executives and other stock owners filed with the SEC include:

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
Daniel D. Corcoran	SVP and General Counsel	$716,957			Mixed	11 May 2026
Patrick F. Smith	President, Drug Dev Solutions	$713,985			Mixed	07 Oct 2024
Nicolette D. Sherman	Chief Human Resources Officer	$707,118			Mixed	01 Apr 2024
Drayton Virkler	President, Reg & Acces	$644,651			Mixed	31 Mar 2023
Cynthia Collins	Director	$507,483			Mixed	14 May 2026
Nancy Killefer	Director	$507,483			Mixed	14 May 2026
Eran Broshy	Director, Chairman	$500,996			Mixed	14 May 2026
Rona Anhalt	Chief Human Resources Officer	$485,678			Mixed	11 May 2026
Rosemary A. Crane	Director	$472,291			Mixed	14 May 2026
John V W. Reynders	Chief Financial Officer, Director	$268,976			Mixed	14 May 2026
Jon Matthew Resnick	Chief Executive Officer, Director	$201,717			Median	11 May 2026
Carol Giltner Gallagher	Director	$127,062			Mixed	15 Jun 2021
Adrian McKemey	President, Drug Dev. Solutions	$72,303			Mixed	01 Apr 2026
Arjun Bedi	Director	$31,617			Median	14 May 2026
David Spaight	Director				Mixed	08 Dec 2022
EQT Avatar Parent L.P.	10%+ Owner				Mixed	08 Dec 2022

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

Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.

Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.

Holder	Source	Role / Reporting	Ownership %	Shares	Holdings Value	12M Net Δ	As of	Details
ARSENAL CAPITAL INVESTMENT VI LP	3/4/5	10%+ Owner	— class O/S missing	36,345,835	$654,225,030	—	08 Dec 2022	3/4/5
ARSENAL CAPITAL PARTNERS III LP	13D/G	Terry M. Mullen	23%	36,345,835	$504,843,648	$0	14 Apr 2025	13D/G
DIMENSIONAL FUND ADVISORS LP	13D/G 13F	Company	5.2%	8,352,281	$102,064,874	$0	30 Sep 2025	13D/G 13F
James E. Flynn	13D/G	Deerfield Mgmt, L.P.	4.9%	7,808,605	$88,705,753	-$25,019,207	25 Nov 2025	13D/G
BlackRock, Inc.	13F	Company	9%	14,307,878	$81,554,906	—	31 Mar 2026	13F
DEERFIELD MANAGEMENT COMPANY, L.P.	13F	Company	4.9%	7,808,605	$44,509,049	—	31 Mar 2026	13F
Jefferies Financial Group Inc.	13F	Company	4.3%	6,858,209	$39,091,792	—	31 Mar 2026	13F
WASATCH ADVISORS LP	13D/G 13F	Company	3.3%	5,272,166	$38,170,482	-$87,793,478	31 Mar 2026	13D/G 13F
VANGUARD PORTFOLIO MANAGEMENT LLC	13F	Company	3.7%	5,969,196	$34,024,417	—	31 Mar 2026	13F
VANGUARD CAPITAL MANAGEMENT LLC	13F	Company	3.4%	5,360,429	$30,554,445	—	31 Mar 2026	13F
ArrowMark Colorado Holdings LLC	13F	Company	2.9%	4,592,707	$26,178,430	—	31 Mar 2026	13F
CITADEL ADVISORS LLC	13F	Company	2.8%	4,545,848	$25,911,333	—	31 Mar 2026	13F
STATE STREET CORP	13F	Company	2.5%	3,940,495	$22,460,822	—	31 Mar 2026	13F
William F. Feehery	3/4/5	CHIEF EXECUTIVE OFFICER, Director	— mixed-class rows	2,828,629 mixed-class rows	$20,511,927	+$200,000	11 Nov 2025	3/4/5
UBS Group AG	13F	Company	2.1%	3,420,632	$19,497,603	—	31 Mar 2026	13F
MORGAN STANLEY	13F	Company	2%	3,240,217	$18,469,243	—	31 Mar 2026	13F
TEACHER RETIREMENT SYSTEM OF TEXAS	13F	Company	1.9%	2,960,963	$16,877,490	—	31 Mar 2026	13F
GENEVA CAPITAL MANAGEMENT LLC	13F	Company	1.7%	2,743,484	$15,637,858	—	31 Mar 2026	13F
MACKENZIE FINANCIAL CORP	13F	Company	1.7%	2,720,040	$15,504,228	—	31 Mar 2026	13F
FORT WASHINGTON INVESTMENT ADVISORS INC /OH/	13F	Company	1.7%	2,675,543	$15,250,595	—	31 Mar 2026	13F
BROWN BROTHERS HARRIMAN & CO	13F	Company	1.6%	2,507,163	$14,290,829	—	31 Mar 2026	13F
AMERIPRISE FINANCIAL INC	13F	Company	1.4%	2,247,859	$12,812,797	—	31 Mar 2026	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.3%	2,114,556	$12,056,207	—	31 Mar 2026	13F
Mason P. Slaine	3/4/5	Director	— class O/S missing	660,322	$11,885,796	—	14 Nov 2022	3/4/5
Sherilyn S. McCoy	3/4/5	Director	— class O/S missing	621,143	$11,180,574	—	18 May 2021	3/4/5
Michael Andrew Schemick	3/4/5	CHIEF FINANCIAL OFFICER	— mixed-class rows	549,499 mixed-class rows	$9,887,790	—	31 Mar 2023	3/4/5
RAYMOND JAMES FINANCIAL INC	13F	Company	1%	1,598,659	$9,112,347	—	31 Mar 2026	13F
Dixon Mitchell Investment Counsel Inc.	13F	Company	0.96%	1,537,876	$8,765,893	—	31 Mar 2026	13F
Gotham Asset Management, LLC	13F	Company	0.89%	1,414,779	$8,064,240	—	31 Mar 2026	13F
T. Rowe Price Investment Management, Inc.	13F	Company	0.84%	1,337,627	$7,625,000	—	31 Mar 2026	13F
Justin P. Edge	3/4/5	PRES., REGULATORY & ACCESS	— mixed-class rows	420,703 mixed-class rows	$7,569,541	—	01 Apr 2022	3/4/5
Kopion Asset Management, LLC	13F	Company	0.81%	1,288,452	$7,344,176	—	31 Mar 2026	13F
JANE STREET GROUP, LLC	13F	Company	0.8%	1,281,858	$7,306,591	—	31 Mar 2026	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	0.79%	1,255,944	$7,158,881	—	31 Mar 2026	13F
ROYCE & ASSOCIATES LP	13F	Company	0.76%	1,215,051	$6,925,791	—	31 Mar 2026	13F
Point72 Asset Management, L.P.	13F	Company	0.7%	1,118,967	$6,378,112	—	31 Mar 2026	13F
ROYAL BANK OF CANADA	13F	Company	0.63%	1,009,089	$5,752,000	—	31 Mar 2026	13F
Craig R. Rayner	3/4/5	PRESIDENT, INTEGRATED DRUG DEV	— class O/S missing	316,010	$5,688,180	—	02 Sep 2021	3/4/5
Quantinno Capital Management LP	13F	Company	0.62%	988,990	$5,637,246	—	31 Mar 2026	13F
FIRST TRUST ADVISORS LP	13F	Company	0.57%	915,484	$5,218,244	—	31 Mar 2026	13F
SG Americas Securities, LLC	13F	Company	0.57%	906,615	$5,168,000	—	31 Mar 2026	13F
GOLDMAN SACHS GROUP INC	13F	Company	0.55%	885,210	$5,045,697	—	31 Mar 2026	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.55%	880,203	$5,017,157	—	31 Mar 2026	13F
HRT FINANCIAL LP	13F	Company	0.54%	868,627	$4,951,000	—	31 Mar 2026	13F
NORTHERN TRUST CORP	13F	Company	0.53%	844,142	$4,811,611	—	31 Mar 2026	13F
Jieun W. Choe	3/4/5	CHIEF STRATEGY & MARKETING	— mixed-class rows	264,539 mixed-class rows	$4,759,787	—	01 Apr 2022	3/4/5
Tejara Capital Ltd	13F	Company	0.5%	792,121	$4,515,090	—	31 Mar 2026	13F
Rathbones Group PLC	13F	Company	0.47%	756,990	$4,314,843	—	31 Mar 2026	13F
Topline Capital Management, LLC	13F	Company	0.47%	749,497	$4,272,133	—	31 Mar 2026	13F
VANGUARD FIDUCIARY TRUST CO	13F	Company	0.47%	743,255	$4,236,554	—	31 Mar 2026	13F

Recent Insider Transactions by Companies or Individuals for Certara, Inc.

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

Insider	Symbol	Class	Transaction	%	Shares	Shares Owned	Date	Ownership
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
Leif E. Pedersen	CERT	Common Stock	Award	19.6%	14,510	88,489	01 Apr 2026	Direct
Leif E. Pedersen	CERT	Restricted Stock Units	Options Exercise	-100%	-33,167	0	01 Apr 2026	Direct
Adrian McKemey	CERT	Common Stock	Tax liability	-24.4%	-2,642	8,207	01 Apr 2026	Direct
Adrian McKemey	CERT	Common Stock	Options Exercise		10,849	10,849	01 Apr 2026	Direct
Adrian McKemey	CERT	Restricted Stock Units	Options Exercise	-33.3%	-10,849	21,698	01 Apr 2026	Direct
Daniel Corcoran	CERT	Common Stock	Tax liability	-21.2%	-5,751	21,319	01 Apr 2026	Direct

* An asterisk sign (*) next to the price indicates that the price is likely invalid.