CERT
Certara Inc
NASDAQ: CERT · HEALTHCARE · HEALTH INFORMATION SERVICES
$5.13
-4.28% today
Updated 2026-06-05
Market cap
$808.94M
P/E ratio
—
P/S ratio
1.93x
EPS (TTM)
$-0.10
Dividend yield
—
52W range
$4 – $14
Volume
3.9M
Certara Inc (CERT) Insider transactions
Net insider activity
Net buying (3,908,111 shares)
Buy transactions
54
Sell transactions
46
All transactions
| Date | Insider | Title | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| 2026-05-14 | WALSH, MATTHEW M | Director | Buy | 33,222 | — | — |
| 2026-05-14 | WALSH, MATTHEW M | Director | Sale | 15,757 | — | — |
| 2026-05-14 | WALSH, MATTHEW M | Director | Buy | 15,757 | — | — |
| 2026-05-14 | REYNDERS, JOHN V W | Director, Chief Financial Officer | Buy | 33,222 | — | — |
| 2026-05-14 | REYNDERS, JOHN V W | Director, Chief Financial Officer | Sale | 15,757 | — | — |
| 2026-05-14 | REYNDERS, JOHN V W | Director, Chief Financial Officer | Buy | 15,757 | — | — |
| 2026-05-14 | KILLEFER, NANCY | Director | Buy | 33,222 | — | — |
| 2026-05-14 | KILLEFER, NANCY | Director | Sale | 15,757 | — | — |
| 2026-05-14 | KILLEFER, NANCY | Director | Buy | 15,757 | — | — |
| 2026-05-14 | CRANE, ROSEMARY A | Director | Sale | 15,757 | — | — |
| 2026-05-14 | CRANE, ROSEMARY A | Director | Buy | 15,757 | — | — |
| 2026-05-14 | COLLINS, CYNTHIA | Director | Sale | 15,757 | — | — |
| 2026-05-14 | COLLINS, CYNTHIA | Director | Buy | 15,757 | — | — |
| 2026-05-14 | CASHMAN, JAMES E III | Director, Chairman | Buy | 33,222 | — | — |
| 2026-05-14 | CASHMAN, JAMES E III | Director, Chairman | Sale | 15,757 | — | — |
| 2026-05-14 | CASHMAN, JAMES E III | Director, Chairman | Buy | 15,757 | — | — |
| 2026-05-14 | BROSHY, ERAN | Director, Chairman | Buy | 33,222 | — | — |
| 2026-05-14 | BROSHY, ERAN | Director, Chairman | Sale | 15,757 | — | — |
| 2026-05-14 | BROSHY, ERAN | Director, Chairman | Buy | 15,757 | — | — |
| 2026-05-14 | BEDI, ARJUN | Director | Buy | 33,222 | — | — |
| 2026-05-14 | BEDI, ARJUN | Director | Sale | 5,547 | — | — |
| 2026-05-14 | BEDI, ARJUN | Director | Buy | 5,547 | — | — |
| 2026-05-11 | RESNICK, JON MATTHEW | Director, Chief Executive Officer | Buy | 728,405 | — | — |
| 2026-05-11 | RESNICK, JON MATTHEW | Director, Chief Executive Officer | Buy | 493,827 | — | — |
| 2026-05-11 | RESNICK, JON MATTHEW | Director, Chief Executive Officer | Buy | 179,299 | — | — |
| 2026-05-11 | RESNICK, JON MATTHEW | Director, Chief Executive Officer | Sale | 59,766 | — | — |
| 2026-05-11 | RESNICK, JON MATTHEW | Director, Chief Executive Officer | Buy | 740,740 | — | — |
| 2026-05-11 | RESNICK, JON MATTHEW | Director, Chief Executive Officer | Buy | 268,949 | — | — |
| 2026-05-11 | RESNICK, JON MATTHEW | Director, Chief Executive Officer | Buy | 59,766 | — | — |
| 2026-05-11 | RESNICK, JON MATTHEW | Director, Chief Executive Officer | Sale | 24,377 | $6.31 | $153818.87 |
| 2026-05-11 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Buy | 74,074 | — | — |
| 2026-05-11 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Buy | 111,111 | — | — |
| 2026-05-11 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Sale | 68,348 | — | — |
| 2026-05-11 | GALLAGHER, JOHN E | Chief Financial Officer | Buy | 129,629 | — | — |
| 2026-05-11 | GALLAGHER, JOHN E | Chief Financial Officer | Buy | 194,444 | — | — |
| 2026-05-11 | GALLAGHER, JOHN E | Chief Financial Officer | Buy | 102,522 | — | — |
| 2026-05-11 | CORCORAN, DANIEL | SVP and General Counsel | Buy | 74,074 | — | — |
| 2026-05-11 | CORCORAN, DANIEL | SVP and General Counsel | Buy | 111,111 | — | — |
| 2026-05-11 | CORCORAN, DANIEL | SVP and General Counsel | Buy | 48,820 | — | — |
| 2026-05-11 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Buy | 246,913 | — | — |
| 2026-05-11 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Buy | 86,419 | — | — |
| 2026-05-11 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Buy | 129,629 | — | — |
| 2026-05-11 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Sale | 68,348 | — | — |
| 2026-05-11 | ANHALT, RONA | Chief Human Resources Officer | Buy | 61,728 | — | — |
| 2026-05-11 | ANHALT, RONA | Chief Human Resources Officer | Buy | 92,592 | — | — |
| 2026-05-11 | ANHALT, RONA | Chief Human Resources Officer | Buy | 43,938 | — | — |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Sale | 15,188 | — | — |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Sale | 10,127 | — | — |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Sale | 7,852 | — | — |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Buy | 15,188 | — | — |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Buy | 14,510 | — | — |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Buy | 10,127 | — | — |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Buy | 7,852 | — | — |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Sale | 3,699 | $5.70 | $21084.30 |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Sale | 3,534 | $5.70 | $20143.80 |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Sale | 2,466 | $5.70 | $14056.20 |
| 2026-04-01 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Sale | 1,912 | $5.70 | $10898.40 |
| 2026-04-01 | MCKEMEY, ADRIAN | President, Drug Dev. Solutions | Sale | 10,849 | — | — |
| 2026-04-01 | MCKEMEY, ADRIAN | President, Drug Dev. Solutions | Buy | 10,849 | — | — |
| 2026-04-01 | MCKEMEY, ADRIAN | President, Drug Dev. Solutions | Sale | 2,642 | $5.70 | $15059.40 |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Sale | 22,782 | — | — |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Sale | 15,190 | — | — |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Sale | 12,633 | — | — |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Buy | 23,346 | — | — |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Buy | 22,782 | — | — |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Buy | 15,190 | — | — |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Buy | 12,633 | — | — |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Sale | 7,803 | $5.70 | $44477.10 |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Sale | 7,775 | $5.70 | $44317.50 |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Sale | 5,203 | $5.70 | $29657.10 |
| 2026-04-01 | GALLAGHER, JOHN E | Chief Financial Officer | Sale | 4,327 | — | — |
| 2026-04-01 | CORCORAN, DANIEL | SVP and General Counsel | Sale | 10,849 | — | — |
| 2026-04-01 | CORCORAN, DANIEL | SVP and General Counsel | Buy | 10,849 | — | — |
| 2026-04-01 | CORCORAN, DANIEL | SVP and General Counsel | Sale | 5,751 | $5.70 | $32780.70 |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Sale | 15,188 | — | — |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Sale | 10,127 | — | — |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Sale | 7,852 | — | — |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Buy | 15,188 | — | — |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Buy | 14,510 | — | — |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Buy | 10,127 | — | — |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Buy | 7,852 | — | — |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Sale | 7,139 | $5.70 | $40692.30 |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Sale | 6,821 | $5.70 | $38879.70 |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Sale | 4,760 | $5.70 | $27132.00 |
| 2026-04-01 | ASPBURY, ROBERT | PRESIDENT, PREDICTIVE TECH | Sale | 3,691 | $5.70 | $21038.70 |
| 2026-04-01 | ANHALT, RONA | Chief Human Resources Officer | Sale | 9,764 | — | — |
| 2026-04-01 | ANHALT, RONA | Chief Human Resources Officer | Buy | 9,764 | — | — |
| 2026-04-01 | ANHALT, RONA | Chief Human Resources Officer | Sale | 3,062 | $5.70 | $17453.40 |
| 2026-02-27 | BEDI, ARJUN | Director | Buy | 5,547 | — | — |
| 2025-11-11 | FEEHERY, WILLIAM F | Director, CHIEF EXECUTIVE OFFICER | Buy | 24,096 | $8.30 | $199996.80 |
| 2025-09-09 | PEDERSEN, LEIF E | PRESIDENT, CHIEF COMMERCAL OFF | Sale | 51,224 | $10.92 | $559366.08 |
| 2025-05-30 | CORCORAN, DANIEL | SVP and General Counsel | Sale | 14,888 | — | — |
| 2025-05-30 | CORCORAN, DANIEL | SVP and General Counsel | Sale | 7,940 | — | — |
| 2025-05-30 | CORCORAN, DANIEL | SVP and General Counsel | Buy | 14,888 | — | — |
| 2025-05-30 | CORCORAN, DANIEL | SVP and General Counsel | Buy | 7,940 | — | — |
| 2025-05-30 | CORCORAN, DANIEL | SVP and General Counsel | Sale | 4,309 | $11.40 | $49122.60 |
| 2025-05-30 | CORCORAN, DANIEL | SVP and General Counsel | Sale | 2,298 | $11.40 | $26197.20 |
| 2025-05-30 | ANHALT, RONA | Chief Human Resources Officer | Sale | 7,146 | — | — |
| 2025-05-30 | ANHALT, RONA | Chief Human Resources Officer | Buy | 7,146 | — | — |
| 2025-05-30 | ANHALT, RONA | Chief Human Resources Officer | Sale | 1,965 | $11.40 | $22401.00 |
Frequently asked questions
Are CERT insiders buying or selling?
Over the transactions on record, CERT insiders have been net buyers, with about $1.19M in stock sold across 46 sales, against 1 open-market purchase.
Does insider selling at CERT mean the stock will fall?
Not by itself. Most executive selling is pre-scheduled through 10b5-1 plans filed months in advance, and insiders sell for diversification, taxes, and liquidity far more often than out of any view on the price. Insider buying is the stronger signal, especially when several insiders buy around the same time, because there is usually only one reason to put personal cash into the stock.
Which CERT insiders are selling the most?
Recent selling is concentrated in a few names. PEDERSEN, LEIF E accounts for the largest share on record, with about $625548.78 sold. Selling by one or two individuals matters less than broad selling across the whole leadership team, which is the pattern worth watching.