Repligen Corporation
US ˙ NasdaqGS ˙ US7599161095

SecurityRGEN / Repligen Corporation
InstitutionKBC Group NV
Latest Disclosed Ownership1,837 shares
Latest Disclosed Value $ 216
KBC Group NV reports 20.70% increase in ownership of RGEN / Repligen Corporation

On May 7, 2026 - KBC Group NV filed a 13F-HR form disclosing ownership of 1,837 shares of Repligen Corporation (US:RGEN) valued at $216,435 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 26, 2026 disclosing 1,522 shares of Repligen Corporation. The current value of the position is $223,618 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)
2026-05-07 2026-03-31 13F REPLIGEN COM 759916109 1,837 315 20.70 0 0.0003
2026-01-26 2025-12-31 13F REPLIGEN COM 759916109 1,522 0 0.00 0 0.0006
2026-01-20 2025-09-30 13F REPLIGEN COM 759916109 1,522 0 0.00 0 0.0005
2025-08-08 2025-06-30 13F REPLIGEN COM 759916109 1,522 -1,022 -40.17 0 0.0005
2025-04-25 2025-03-31 13F REPLIGEN COM 759916109 2,544 329 14.85 0 0.0010
2025-01-22 2024-12-31 13F REPLIGEN COM 759916109 2,215 -754 -25.40 0 0.0009
2024-11-06 2024-09-30 13F REPLIGEN COM 759916109 2,969 -5,483 -64.87 0 -100.00 0.0013
2024-07-17 2024-06-30 13F REPLIGEN COM 759916109 8,452 66 0.79 1 0.00 0.0032
2024-05-08 2024-03-31 13F REPLIGEN COM 759916109 8,386 219 2.68 2 0.00 0.0049
2024-02-13 2023-12-31 13F REPLIGEN COM 759916109 8,167 -32,185 -79.76 1 -83.33 0.0052
2024-02-15 2023-09-30 13F/A-1 REPLIGEN COM 759916109 40,352 19,318 91.84 6 200.00 0.0262
2023-11-22 2023-09-30 13F REPLIGEN COM 759916109 20,503 0 3 0.0121
2024-02-15 2023-06-30 13F/A-1 REPLIGEN COM 759916109 21,034 2,157 11.43 3 -33.33 0.0122
2023-07-28 2023-06-30 13F REPLIGEN COM 759916109 20,503 20,503 3 0.0121
2024-02-14 2023-03-31 13F/A-1 REPLIGEN COM 759916109 18,877 15,425 446.84 3 0.0135
2024-02-14 2022-12-31 13F/A-1 REPLIGEN COM 759916109 3,452 3,452 1 0.0028
2020-02-11 2019-12-31 13F REPLIGEN COM 759916109 0 -30,929 -100.00 0 -100.00
2019-11-07 2019-09-30 13F REPLIGEN COM 759916109 30,929 13,617 78.66 2,372 59.41 0.0174
2019-08-08 2019-06-30 13F/A-1 REPLIGEN COM 759916109 17,312 0 0.00 1,488 45.45 0.0115
2019-07-30 2019-06-30 13F REPLIGEN COM 759916109 17,312 0 1,488
2019-08-07 2019-03-31 13F/A-1 REPLIGEN COM 759916109 17,312 17,312 1,023 0.0084
2019-05-10 2019-03-31 13F REPLIGEN COM 759916109 17,312 17,312 1,023
2016-11-03 2016-09-30 13F REPLIGEN COM 759916109 0 -2,354 -100.00 0 -100.00
2016-08-03 2016-06-30 13F REPLIGEN COM 759916109 2,354 0 0.00 64 1.59 0.0009
2016-05-11 2016-03-31 13F REPLIGEN COM 759916109 2,354 0 0.00 63 -5.97 0.0010
2016-02-11 2015-12-31 13F REPLIGEN COM 759916109 2,354 0 0.00 67 1.52 0.0012
2015-11-12 2015-09-30 13F REPLIGEN COM 759916109 2,354 -1,145 -32.72 66 -54.17 0.0013
2015-12-16 2015-06-30 13F/A-1 REPLIGEN COM 759916109 3,499 0 0.00 144 35.85 0.0019
2015-07-31 2015-06-30 13F REPLIGEN COM 759916109 3,499 144
2015-12-16 2015-03-31 13F/A-1 REPLIGEN COM 759916109 3,499 0 0.00 106 53.62 0.0013
2015-04-30 2015-03-31 13F REPLIGEN COM 759916109 3,499 106
2015-12-15 2014-12-31 13F/A-1 REPLIGEN COM 759916109 3,499 0 0.00 69 -1.43 0.0008
2015-02-12 2014-12-31 13F REPLIGEN COM 759916109 3,499 69
2014-10-16 2014-09-30 13F REPLIGEN COM 759916109 3,499 3,499 70 0.0024
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.