Certara, Inc.
DE ˙ HMSE ˙ US15687V1098
SecurityDE:700 / Certara, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership290,673 shares
Latest Disclosed Value $ 1,656,804
Rhumbline Advisers reports 4.51% increase in ownership of 700 / Certara, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 290,673 shares of Certara, Inc. (DE:700) valued at $1,656,804 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 278,136 shares of Certara, Inc.. This represents a change in shares of 4.51% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-12 2026-03-31 13F CERTARA COM 15687V109 290,673 12,537 4.51 1,657 -32.41 0.0014
2026-02-13 2025-12-31 13F CERTARA COM 15687V109 278,136 -343 -0.12 2,450 -27.98 0.0020
2025-11-06 2025-09-30 13F CERTARA COM 15687V109 278,479 14,578 5.52 3,403 10.20 0.0027
2025-08-12 2025-06-30 13F CERTARA COM 15687V109 263,901 3,447 1.32 3,088 19.74 0.0026
2025-05-29 2025-03-31 13F/A-1 CERTARA COM 15687V109 260,454 -16,998 -6.13 2,578 -12.73 0.0024
2025-04-08 2025-03-31 13F CERTARA COM 15687V109 260,454 -16,998 2,578 0.0024
2025-05-29 2024-12-31 13F/A-1 CERTARA COM 15687V109 277,452 10,739 4.03 2,955 -5.41 0.0026
2025-01-30 2024-12-31 13F CERTARA COM 15687V109 277,452 10,739 2,955 0.0026
2024-11-12 2024-09-30 13F CERTARA COM 15687V109 266,713 7,023 2.70 3,123 -13.15 0.0028
2024-08-01 2024-06-30 13F CERTARA COM 15687V109 259,690 -22,799 -8.07 3,597 -28.79 0.0034
2024-05-09 2024-03-31 13F CERTARA COM 15687V109 282,489 -12,129 -4.12 5,051 -2.55 0.0049
2024-02-08 2023-12-31 13F CERTARA COM 15687V109 294,618 -4,392 -1.47 5,182 19.21 0.0054
2023-11-09 2023-09-30 13F CERTARA COM 15687V109 299,010 -1,402 -0.47 4,348 -20.53 0.0050
2023-08-08 2023-06-30 13F CERTARA COM 15687V109 300,412 -63,425 -17.43 5,471 68,275.00 0.0061
2023-05-11 2023-03-31 13F CERTARA COM 15687V109 363,837 240,004 193.81 9 -99.60 0.0108
2023-02-14 2022-12-31 13F CERTARA COM 15687V109 123,833 6,217 5.29 1,990 27.40 0.0027
2022-11-10 2022-09-30 13F CERTARA COM 15687V109 117,616 7,753 7.06 1,562 -33.76 0.0023
2022-08-11 2022-06-30 13F CERTARA COM 15687V109 109,863 19,296 21.31 2,358 21.23 0.0034
2022-05-12 2022-03-31 13F CERTARA COM 15687V109 90,567 -2,544 -2.73 1,945 -26.49 0.0025
2022-02-10 2021-12-31 13F CERTARA COM 15687V109 93,111 23,418 33.60 2,646 14.69 0.0032
2021-11-12 2021-09-30 13F CERTARA COM 15687V109 69,693 38,304 122.03 2,307 159.51 0.0031
2021-08-05 2021-06-30 13F CERTARA COM 15687V109 31,389 4,623 17.27 889 21.61 0.0012
2021-05-06 2021-03-31 13F CERTARA COM 15687V109 26,766 26,766 731 0.0010
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.