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.

Official SEC Source

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	24,096	0	$200,000	$0	+$200,000
6-9	0	51,224	$0	$559,366	-$559,366
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
James E. Cashman III	Director, Chairman	$6,718,592			Mixed	21 May 2025
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	01 Apr 2026
Matthew M. Walsh	Director	$2,956,055			Mixed	21 May 2025
Leif E. Pedersen	President, Chief Commercal Off	$1,170,011	-$559,366	-32%	Mixed	01 Apr 2026
John E. Gallagher	Chief Financial Officer	$1,140,990			Mixed	01 Apr 2026
Stephen M. McLean	Director	$756,000			Mixed	19 Aug 2022
Daniel Corcoran	SVP and General Counsel	$716,957			Mixed	01 Apr 2026
Patrick F. Smith	President, Drug Dev Solutions	$713,985			Mixed	07 Oct 2024
Nancy Killefer	Director	$713,237			Mixed	21 May 2025
Cynthia Collins	Director	$713,237			Mixed	21 May 2025
Nicolette D. Sherman	Chief Human Resources Officer	$707,118			Mixed	01 Apr 2024
Eran Broshy	Director, Chairman	$697,430			Mixed	21 May 2025
Drayton Virkler	President, Reg & Acces	$644,651			Mixed	31 Mar 2023
Rosemary A. Crane	Director	$627,480			Mixed	21 May 2025
Rona Anhalt	Chief Human Resources Officer	$485,678			Mixed	01 Apr 2026
John V W. Reynders	Director	$266,868			Mixed	21 May 2025
Carol Giltner Gallagher	Director	$127,062			Mixed	15 Jun 2021
Adrian McKemey	President, Drug Dev. Solutions	$72,303			Mixed	01 Apr 2026
Jon Matthew Resnick	Chief Executive Officer, Director				Mixed	01 Jan 2026
Arjun Bedi	Director				Mixed	27 Feb 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
WASATCH ADVISORS LP	13F 13D/G	Company	3.3% from 13D/G	17,223,081	$151,735,344	—	31 Dec 2025	13F 13D/G
BlackRock, Inc.	13F	Company	8.7%	13,926,863	$122,695,663	—	31 Dec 2025	13F
VANGUARD GROUP INC	13F	Company	7.5%	11,916,099	$104,980,832	—	31 Dec 2025	13F
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
DEERFIELD MANAGEMENT COMPANY, L.P.	13F	Company	4.9%	7,808,605	$68,793,810	—	31 Dec 2025	13F
TEACHER RETIREMENT SYSTEM OF TEXAS	13F	Company	3.5%	5,602,777	$49,360,465	—	31 Dec 2025	13F
ArrowMark Colorado Holdings LLC	13F	Company	3.4%	5,485,699	$48,329,008	—	31 Dec 2025	13F
GENEVA CAPITAL MANAGEMENT LLC	13F	Company	3.4%	5,411,712	$47,677,184	—	31 Dec 2025	13F
MORGAN STANLEY	13F	Company	3.2%	5,055,818	$44,541,790	—	31 Dec 2025	13F
STATE STREET CORP	13F	Company	2.5%	3,918,784	$34,524,487	—	31 Dec 2025	13F
BROWN BROTHERS HARRIMAN & CO	13F	Company	2.4%	3,764,034	$33,161,140	—	31 Dec 2025	13F
CITADEL ADVISORS LLC	13F	Company	2%	3,190,612	$28,109,292	—	31 Dec 2025	13F
Jefferies Financial Group Inc.	13F	Company	1.9%	3,031,374	$26,706,405	—	31 Dec 2025	13F
MACKENZIE FINANCIAL CORP	13F	Company	1.7%	2,670,540	$23,614,435	—	31 Dec 2025	13F
MILLENNIUM MANAGEMENT LLC	13F	Company	1.7%	2,653,047	$23,373,344	—	31 Dec 2025	13F
UBS Group AG	13F	Company	1.6%	2,489,603	$21,933,403	—	31 Dec 2025	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
FORT WASHINGTON INVESTMENT ADVISORS INC /OH/	13F	Company	1.4%	2,272,823	$20,023,571	—	31 Dec 2025	13F
GEODE CAPITAL MANAGEMENT, LLC	13F	Company	1.4%	2,166,624	$19,092,606	—	31 Dec 2025	13F
Capital World Investors	13F	Company	1.4%	2,160,079	$19,030,296	—	31 Dec 2025	13F
Topline Capital Management, LLC	13F	Company	1.2%	1,990,927	$17,540,067	—	31 Dec 2025	13F
AMERIPRISE FINANCIAL INC	13F	Company	0.99%	1,582,655	$13,943,191	—	31 Dec 2025	13F
Dixon Mitchell Investment Counsel Inc.	13F	Company	0.97%	1,546,299	$13,622,894	—	31 Dec 2025	13F
Select Equity Group, L.P.	13F	Company	0.93%	1,491,161	$13,137,128	—	31 Dec 2025	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
ROYAL BANK OF CANADA	13F	Company	0.79%	1,254,259	$11,050,000	—	31 Dec 2025	13F
LONDON CO OF VIRGINIA	13F	Company	0.78%	1,249,237	$11,005,787	—	31 Dec 2025	13F
Woodline Partners LP	13F	Company	0.72%	1,157,286	$10,195,690	—	31 Dec 2025	13F
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
SEI INVESTMENTS CO	13F	Company	0.69%	1,100,847	$9,698,472	—	31 Dec 2025	13F
Bank of New York Mellon Corp	13F	Company	0.68%	1,080,842	$9,522,217	—	31 Dec 2025	13F
GLENMEDE TRUST CO NA	13F	Company	0.63%	1,002,095	$8,828,455	—	31 Dec 2025	13F
Kopion Asset Management, LLC	13F	Company	0.62%	982,710	$8,657,675	—	31 Dec 2025	13F
RAYMOND JAMES FINANCIAL INC	13F	Company	0.59%	936,154	$8,247,503	—	31 Dec 2025	13F
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC	13F	Company	0.55%	876,762	$7,724,273	—	31 Dec 2025	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
MASSACHUSETTS FINANCIAL SERVICES CO /MA/	13F	Company	0.53%	853,541	$7,519,696	—	31 Dec 2025	13F
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	13F	Company	0.53%	843,796	$7,433,843	—	31 Dec 2025	13F
Pier Capital, LLC	13F	Company	0.53%	840,449	$7,404,356	—	31 Dec 2025	13F
T. Rowe Price Investment Management, Inc.	13F	Company	0.52%	829,683	$7,310,000	—	31 Dec 2025	13F
Nuveen, LLC	13F	Company	0.5%	800,628	$7,053,533	—	31 Dec 2025	13F
MARSHALL WACE, LLP	13F	Company	0.5%	798,182	$7,031,984	—	31 Dec 2025	13F
NORTHERN TRUST CORP	13F	Company	0.48%	767,449	$6,761,226	—	31 Dec 2025	13F
James E. Cashman III	3/4/5	Director, Chairman	— mixed-class rows	484,197 mixed-class rows	$6,718,592	—	21 May 2025	3/4/5
Rathbones Group PLC	13F	Company	0.47%	756,990	$6,669,081	—	31 Dec 2025	13F
SILVERCREST ASSET MANAGEMENT GROUP LLC	13F	Company	0.42%	670,772	$5,909,501	—	31 Dec 2025	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	%	Value $	* Price $	Shares	Shares Owned	Date	Ownership
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
Daniel Corcoran	CERT	Common Stock	Options Exercise	66.9%			10,849	27,070	01 Apr 2026	Direct
Daniel Corcoran	CERT	Restricted Stock Units	Options Exercise	-33.3%			-10,849	21,698	01 Apr 2026	Direct
John E. Gallagher	CERT	Common Stock	Options Exercise	96.3%			50,605	103,174	01 Apr 2026	Direct
John E. Gallagher	CERT	Common Stock	Tax liability	-28.8%			-25,108	62,099	01 Apr 2026	Direct
John E. Gallagher	CERT	Common Stock	Award	50.2%			23,346	69,874	01 Apr 2026	Direct
John E. Gallagher	CERT	Restricted Stock Units	Options Exercise	-100%			-50,605	0	01 Apr 2026	Direct
Robert Aspbury	CERT	Common Stock	Options Exercise	10.8%			33,167	339,581	01 Apr 2026	Direct
Robert Aspbury	CERT	Common Stock	Tax liability	-6.64%			-22,411	314,865	01 Apr 2026	Direct
Robert Aspbury	CERT	Common Stock	Award	4.72%			14,510	321,686	01 Apr 2026	Direct
Robert Aspbury	CERT	Restricted Stock Units	Options Exercise	-100%			-33,167	0	01 Apr 2026	Direct
Rona Anhalt	CERT	Common Stock	Tax liability	-20.5%			-3,062	11,883	01 Apr 2026	Direct
Rona Anhalt	CERT	Common Stock	Options Exercise	188.5%			9,764	14,945	01 Apr 2026	Direct
Rona Anhalt	CERT	Restricted Stock Units	Options Exercise	-33.3%			-9,764	19,528	01 Apr 2026	Direct
Arjun Bedi	CERT	Restricted Stock Units	Award				5,547	5,547	27 Feb 2026	Direct
William F. Feehery	CERT	Common Stock	Purchase	1.03%	$200,000	$8.30	24,096	2,360,769	11 Nov 2025	Direct
Leif E. Pedersen	CERT	Common Stock	Sale	-40.9%	$559,366	$10.92	-51,224	73,979	09 Sep 2025	Direct
Rona Anhalt	CERT	Common Stock	Tax liability	-27.5%			-1,965	5,181	30 May 2025	Direct
Rona Anhalt	CERT	Common Stock	Options Exercise				7,146	7,146	30 May 2025	Direct
Rona Anhalt	CERT	Restricted Stock Units	Options Exercise	-33.3%			-7,146	14,294	30 May 2025	Direct
Daniel Corcoran	CERT	Comon Stock	Options Exercise	263.9%			14,888	20,530	30 May 2025	Direct
Daniel Corcoran	CERT	Common Stock	Tax liability	-53.9%			-6,607	5,642	30 May 2025	Direct
Daniel Corcoran	CERT	Common Stock	Options Exercise				7,940	7,940	30 May 2025	Direct
Daniel Corcoran	CERT	Restricted Stock Units	Options Exercise	-60.5%			-22,828	14,889	30 May 2025	Direct
Matthew M. Walsh	CERT	Common Stock	Options Exercise	6.43%			11,928	197,559	21 May 2025	Direct
Matthew M. Walsh	CERT	Restricted Stock Units	Award				15,757	15,757	21 May 2025	Direct
Matthew M. Walsh	CERT	Restricted Stock Units	Options Exercise	-100%			-11,928	0	21 May 2025	Direct
John V W. Reynders	CERT	Common Stock	Options Exercise				10,709	10,709	21 May 2025	Direct
John V W. Reynders	CERT	Restricted Stock Units	Award				15,757	15,757	21 May 2025	Direct
John V W. Reynders	CERT	Restricted Stock Units	Options Exercise	-100%			-10,709	0	21 May 2025	Direct
Nancy Killefer	CERT	Common Stock	Options Exercise	49.4%			11,928	36,089	21 May 2025	Direct
Nancy Killefer	CERT	Restricted Stock Units	Award				15,757	15,757	21 May 2025	Direct
Nancy Killefer	CERT	Restricted Stock Units	Options Exercise	-100%			-11,928	0	21 May 2025	Direct
Rosemary A. Crane	CERT	Common Stock	Options Exercise	66.3%			11,928	29,915	21 May 2025	Direct
Rosemary A. Crane	CERT	Restricted Stock Units	Award				15,757	15,757	21 May 2025	Direct
Rosemary A. Crane	CERT	Restricted Stock Units	Options Exercise	-100%			-11,928	0	21 May 2025	Direct
Cynthia Collins	CERT	Common Stock	Options Exercise	49.4%			11,928	36,089	21 May 2025	Direct
Cynthia Collins	CERT	Restricted Stock Units	Award				15,757	15,757	21 May 2025	Direct
Cynthia Collins	CERT	Restricted Stock Units	Options Exercise	-100%			-11,928	0	21 May 2025	Direct
James E. Cashman III	CERT	Common Stock	Options Exercise	2.61%			11,928	468,440	21 May 2025	Direct
James E. Cashman III	CERT	Restricted Stock Units	Award				15,757	15,757	21 May 2025	Direct
James E. Cashman III	CERT	Restricted Stock Units	Options Exercise	-100%			-11,928	0	21 May 2025	Direct
Eran Broshy	CERT	Common Stock	Options Exercise	51.8%			11,928	34,951	21 May 2025	Direct

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