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John Overdeck’s Certara CERT Stock Holding History

John Overdeck’s Portfolio CERT Stock Details CERT Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$7.24M Buy
1,104,605
+1,041,872
+1,661% +$5.87M 0.01% 1799
2026
Q1 		$358K Sell
62,733
-157,854
-72% -$1.2M ﹤0.01% 3960
2025
Q4 		$1.94M Sell
220,587
-220,394
-50% -$2.27M ﹤0.01% 2460
2025
Q3 		$5.39M Buy
440,981
+61,734
+16% +$675K 0.01% 1399
2025
Q2 		$4.44M Buy
379,247
+178,800
+89% +$2.12M 0.01% 1295
2025
Q1 		$1.98M Sell
200,447
-177,077
-47% -$2.15M ﹤0.01% 1746
2024
Q4 		$4.02M Buy
377,524
+63,246
+20% +$687K 0.01% 1239
2024
Q3 		$3.68M Buy
314,278
+294,847
+1,517% +$3.89M 0.01% 1255
2024
Q2 		$269K Buy
+19,431
New +$319K ﹤0.01% 2642
2024
Q1 		– Sell
-11,778
Closed -$207K – 3059
2023
Q4 		$207K Sell
11,778
-62,700
-84% -$919K ﹤0.01% 2826
2023
Q3 		$1.08M Sell
74,478
-111,955
-60% -$1.88M ﹤0.01% 1889
2023
Q2 		$3.39M Buy
186,433
+152,733
+453% +$3.23M 0.01% 1114
2023
Q1 		$813K Buy
+33,700
New +$666K ﹤0.01% 1979
2022
Q4 		– Sell
-247,089
Closed -$3.28M – 2821
2022
Q3 		$3.28M Buy
+247,089
New +$4.57M 0.01% 935
2021
Q4 		– Sell
-9,900
Closed -$328K – 4332
2021
Q3 		$328K Buy
+9,900
New +$299K ﹤0.01% 3591

Other funds holding CERT

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
DM
Deerfield Management New York $9.59B AUM 113.36% 1-Year Est. Return
HIM
Haveli Investment Management Austin, Texas $180M AUM
JFG
Jefferies Financial Group New York $15.2B AUM 55.75% 1-Year Est. Return
Vanguard Portfolio Management
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
WA
Wasatch Advisors Salt Lake City, Utah $15.3B AUM 25.06% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

John Overdeck's CERT Position: Q2 2026 in Review

John Overdeck increased its Certara (CERT) stake by 1,661% in Q2 2026, buying an estimated $5.87M and bringing the position to 1,104,605 shares worth $7.24M. The position accounts for 0.01% of the portfolio, ranked #1799.

John Overdeck first reported a position in CERT in Q3 2021 and has held it in 15 quarters since. 240 funds tracked by Wall St. Rank hold CERT as of Q2 2026.

  • John Overdeck held 1,104,605 shares of Certara worth $7.24M as of Q2 2026.
  • John Overdeck bought 1,041,872 Certara shares in Q2 2026, an estimated $5.87M.
  • Certara made up 0.01% of John Overdeck's portfolio in Q2 2026, its #1799 holding.
  • John Overdeck first reported a position in Certara in Q3 2021 and has held it in 15 quarters since.
  • 240 funds tracked by Wall St. Rank held Certara as of Q2 2026.

Based on Two Sigma Investments's 13F filing for Q2 2026, filed 14 Aug 2026.