Repligen Corporation
US ˙ NasdaqGS ˙ US7599161095

SecurityRGEN / Repligen Corporation
InstitutionAmalgamated Bank
Latest Disclosed Ownership23,985 shares
Latest Disclosed Value $ 2,826
Amalgamated Bank reports 1.42% increase in ownership of RGEN / Repligen Corporation

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 23,985 shares of Repligen Corporation (US:RGEN) valued at $2,825,913 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 23,649 shares of Repligen Corporation. This represents a change in shares of 1.42% during the quarter. The current value of the position is $2,933,605 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)
2026-05-08 2026-03-31 13F REPLIGEN COM 759916109 23,985 336 1.42 3 -33.33 0.0216
2026-02-05 2025-12-31 13F REPLIGEN COM 759916109 23,649 -636 -2.62 4 0.00 0.0280
2025-10-29 2025-09-30 13F REPLIGEN COM 759916109 24,285 143 0.59 3 0.00 0.0232
2025-08-04 2025-06-30 13F REPLIGEN COM 759916109 24,142 -4 -0.02 3 0.00 0.0232
2025-04-25 2025-03-31 13F REPLIGEN COM 759916109 24,146 -968 -3.85 3 0.00 0.0263
2025-02-04 2024-12-31 13F REPLIGEN COM 759916109 25,114 238 0.96 4 0.00 0.0297
2024-10-30 2024-09-30 13F REPLIGEN COM 759916109 24,876 -1,740 -6.54 4 0.00 0.0305
2024-08-12 2024-06-30 13F REPLIGEN COM 759916109 26,616 -2,203 -7.64 3 -40.00 0.0286
2024-04-23 2024-03-31 13F REPLIGEN COM 759916109 28,819 -5,536 -16.11 5 -16.67 0.0453
2024-02-06 2023-12-31 13F REPLIGEN COM 759916109 34,355 -1,769 -4.90 6 20.00 0.0493
2023-11-08 2023-09-30 13F REPLIGEN COM 759916109 36,124 134 0.37 6 0.00 0.0489
2023-08-11 2023-06-30 13F REPLIGEN COM 759916109 35,990 -2,097 -5.51 5 -16.67 0.0412
2023-05-02 2023-03-31 13F REPLIGEN COM 759916109 38,087 -1,956 -4.88 6 0.00 0.0547
2023-02-10 2022-12-31 13F REPLIGEN COM 759916109 40,043 62 0.16 7 -99.92 0.0605
2022-11-09 2022-09-30 13F REPLIGEN COM 759916109 39,981 1,395 3.62 7,481 19.39 0.0722
2022-08-15 2022-06-30 13F REPLIGEN COM 759916109 38,586 -414 -1.06 6,266 -14.59 0.0584
2022-08-25 2022-03-31 13F/A-1 REPLIGEN COM 759916109 39,000 -120 -0.31 7,336 -29.20 0.0570
2022-06-30 2022-03-31 13F REPLIGEN COM 759916109 39,000 -120 7,336 0.0583
2022-02-15 2021-12-31 13F/A-1 REPLIGEN COM 759916109 39,120 1,408 3.73 10,361 -4.93 0.0765
2022-02-15 2021-12-31 13F REPLIGEN COM 759916109 39,120 1,408 10,361 0.0765
2021-10-29 2021-09-30 13F REPLIGEN COM 759916109 37,712 -3,839 -9.24 10,898 31.40 0.0920
2021-08-16 2021-06-30 13F REPLIGEN COM 759916109 41,551 31,074 296.59 8,294 307.17 0.0665
2021-05-13 2021-03-31 13F REPLIGEN COM 759916109 10,477 -525 -4.77 2,037 -3.37 0.0764
2021-02-12 2020-12-31 13F REPLIGEN COM 759916109 11,002 45 0.41 2,108 30.36 0.0799
2020-10-30 2020-09-30 13F REPLIGEN COM 759916109 10,957 -292 -2.60 1,617 16.33 0.0703
2020-08-10 2020-06-30 13F REPLIGEN COM 759916109 11,249 1,521 15.64 1,390 48.03 0.0643
2020-05-13 2020-03-31 13F REPLIGEN COM 759916109 9,728 -249 -2.50 939 1.73 0.0230
2020-02-13 2019-12-31 13F REPLIGEN COM 759916109 9,977 925 10.22 923 33.00 0.0170
2019-11-13 2019-09-30 13F REPLIGEN COM 759916109 9,052 185 2.09 694 -8.92 0.0146
2019-08-14 2019-06-30 13F REPLIGEN COM 759916109 8,867 2,573 40.88 762 104.84 0.0178
2019-05-15 2019-03-31 13F REPLIGEN COM 759916109 6,294 145 2.36 372 14.81 0.0090
2019-02-15 2018-12-31 13F REPLIGEN COM 759916109 6,149 6,149 324 0.0092
2018-11-14 2018-09-30 13F REPLIGEN COM 759916109 0 -6,343 -100.00 0 -100.00
2018-07-18 2018-06-30 13F REPLIGEN COM 759916109 6,343 6,343 298 0.0073
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.