Repligen Corporation
DE ˙ DB ˙ US7599161095
104,00 € ↑7,94 (8,27%)
2026-05-29
AKTIENPREIS
SecurityDE:RGN / Repligen Corporation
InstitutionSei Investments Co
Latest Disclosed Ownership181,988 shares
Latest Disclosed Value $ 29,821,081
Sei Investments Co reports 15.37% decrease in ownership of RGN / Repligen Corporation

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 181,988 shares of Repligen Corporation (DE:RGN) valued at $25,323,630 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 215,036 shares of Repligen Corporation. This represents a change in shares of -15.37% during the quarter. The current value of the position is $18,926,752 USD.

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)
2026-02-13 2025-12-31 13F REPLIGEN COM 759916109 181,988 -33,048 -15.37 29,821 3.75
2025-11-13 2025-09-30 13F REPLIGEN COM 759916109 215,036 -13,439 -5.88 28,744 1.15 0.0309
2025-08-14 2025-06-30 13F REPLIGEN COM 759916109 228,475 -22,243 -8.87 28,418 -10.92 0.0329
2025-05-14 2025-03-31 13F/A-1 REPLIGEN COM 759916109 250,718 31,114 14.17 31,900 0.92 0.0411
2025-05-13 2025-03-31 13F REPLIGEN COM 759916109 222,561 2,957 31,802 0.0346
2025-02-11 2024-12-31 13F REPLIGEN COM 759916109 219,604 24,662 12.65 31,610 8.95 0.0406
2024-11-12 2024-09-30 13F REPLIGEN COM 759916109 194,942 7,399 3.95 29,013 22.72 0.0377
2024-08-13 2024-06-30 13F REPLIGEN COM 759916109 187,543 -31,171 -14.25 23,641 -41.23 0.0335
2024-05-07 2024-03-31 13F REPLIGEN COM 759916109 218,714 -40,227 -15.54 40,226 -13.60 0.0589
2024-02-14 2023-12-31 13F REPLIGEN COM 759916109 258,941 7,064 2.80 46,559 16.25 0.0747
2023-11-14 2023-09-30 13F REPLIGEN COM 759916109 251,877 64,774 34.62 40,052 51.33 0.0720
2023-08-11 2023-06-30 13F REPLIGEN COM 759916109 187,103 48,061 34.57 26,467 13.05 0.0462
2023-05-12 2023-03-31 13F REPLIGEN COM 759916109 139,042 356 0.26 23,410 -0.31 0.0435
2023-02-10 2022-12-31 13F REPLIGEN COM 759916109 138,686 -8,984 -6.08 23,484 -15.02 0.0522
2022-11-14 2022-09-30 13F REPLIGEN COM 759916109 147,670 35,904 32.12 27,632 52.80 0.0616
2022-08-15 2022-06-30 13F REPLIGEN COM 759916109 111,766 51,849 86.53 18,084 59.60 0.0391
2022-05-13 2022-03-31 13F REPLIGEN COM 759916109 59,917 9,352 18.50 11,331 -15.74 0.0228
2022-02-14 2021-12-31 13F REPLIGEN COM 759916109 50,565 8,963 21.54 13,447 12.56 0.0252
2021-11-12 2021-09-30 13F REPLIGEN COM 759916109 41,602 13,684 49.01 11,946 114.47 0.0251
2021-08-06 2021-06-30 13F REPLIGEN COM 759916109 27,918 5,807 26.26 5,570 30.11 0.0124
2021-05-12 2021-03-31 13F REPLIGEN COM 759916109 22,111 9,806 79.69 4,281 81.71 0.0108
2021-02-08 2020-12-31 13F REPLIGEN COM 759916109 12,305 -3,867 -23.91 2,356 -1.09 0.0061
2020-12-04 2020-09-30 13F/A-1 REPLIGEN COM 759916109 16,172 6,472 66.72 2,382 99.33 0.0069
2020-11-06 2020-09-30 13F REPLIGEN COM 759916109 16,603 6,903 2,446 5,889.4242
2020-08-17 2020-06-30 13F/A-1 REPLIGEN COM 759916109 9,700 -13,403 -58.01 1,195 -46.44 0.0037
2020-08-11 2020-06-30 13F REPLIGEN COM 759916109 18,077 -5,026 1,852 5,023.6486
2020-05-14 2020-03-31 13F REPLIGEN COM 759916109 23,103 3,531 18.04 2,231 23.26 0.0082
2020-02-06 2019-12-31 13F REPLIGEN COM 759916109 19,572 -389 -1.95 1,810 17.84 0.0054
2019-11-12 2019-09-30 13F REPLIGEN COM 759916109 19,961 114 0.57 1,536 -9.70 0.0039
2019-08-14 2019-06-30 13F REPLIGEN COM 759916109 19,847 16,547 501.42 1,701 759.09 0.0056
2019-05-15 2019-03-31 13F REPLIGEN COM 759916109 3,300 -45,085 -93.18 198 -92.48 0.0007
2019-02-13 2018-12-31 13F REPLIGEN COM 759916109 48,385 17,983 59.15 2,634 56.23 0.0094
2018-11-08 2018-09-30 13F REPLIGEN COM 759916109 30,402 -50,335 -62.34 1,686 -55.61 0.0061
2018-08-03 2018-06-30 13F REPLIGEN COM 759916109 80,737 -3,100 -3.70 3,798 25.22 0.0129
2018-05-11 2018-03-31 13F REPLIGEN COM 759916109 83,837 -83,787 -49.99 3,033 -50.12 0.0116
2018-02-08 2017-12-31 13F REPLIGEN COM 759916109 167,624 9,124 5.76 6,081 0.12 0.0211
2017-11-06 2017-09-30 13F REPLIGEN COM 759916109 158,500 3,500 2.26 6,074 -5.43 0.0216
2017-07-31 2017-06-30 13F REPLIGEN COM 759916109 155,000 28,400 22.43 6,423 44.14 0.0256
2017-05-05 2017-03-31 13F REPLIGEN COM 759916109 126,600 41,600 48.94 4,456 70.08 0.0195
2017-02-02 2016-12-31 13F REPLIGEN COM 759916109 85,000 70 0.08 2,620 2.18 0.0127
2016-11-04 2016-09-30 13F REPLIGEN COM 759916109 84,930 84,045 9,496.61 2,564 10,583.33 0.0130
2016-08-11 2016-06-30 13F REPLIGEN COM 759916109 885 525 145.83 24 140.00 0.0001
2016-05-10 2016-03-31 13F/A-1 REPLIGEN COM 759916109 360 360 0.00 10 0.0001
2016-02-03 2015-12-31 13F REPLIGEN COM 759916109 0 -15,244 -100.00 0 -100.00
2015-11-02 2015-09-30 13F/A-1 REPLIGEN COM 759916109 15,244 15,244 425 0.0039
2015-10-30 2015-09-30 13F REPLIGEN COM 759916109 15,244 425
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.