Calamos Advisors
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Calamos Advisors’s Repligen RGEN Stock Holding History

Calamos Advisors’s Portfolio RGEN Stock Details RGEN Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-3,362
Closed -$551K – 1263
2025
Q4 		$551K Buy
+3,362
New +$527K ﹤0.01% 752
2022
Q2 		– Sell
-2,333
Closed -$439K – 1203
2022
Q1 		$439K Sell
2,333
-6,338
-73% -$1.2M ﹤0.01% 1089
2021
Q4 		$2.3M Buy
8,671
+3,427
+65% +$923K 0.01% 876
2021
Q3 		$1.51M Buy
5,244
+2,907
+124% +$746K 0.01% 810
2021
Q2 		$467K Sell
2,337
-13,037
-85% -$2.53M ﹤0.01% 888
2021
Q1 		$2.99M Sell
15,374
-270
-2% -$55.4K 0.02% 637
2020
Q4 		$3M Buy
15,644
+2,806
+22% +$511K 0.02% 581
2020
Q3 		$1.89M Buy
12,838
+1,759
+16% +$251K 0.01% 601
2020
Q2 		$1.37M Buy
+11,079
New +$1.3M 0.01% 613
2019
Q4 		– Sell
-7,995
Closed -$613K – 810
2019
Q3 		$613K Buy
+7,995
New +$699K ﹤0.01% 681

Other funds holding RGEN

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
T. Rowe Price Associates
T. Rowe Price Associates Baltimore, Maryland $865B AUM 30.76% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
UCFA
United Capital Financial Advisors Irving, Texas $16.3B AUM 16.34% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $609B AUM 40.19% 1-Year Est. Return
MC
Maverick Capital Dallas, Texas $8.67B AUM 48.76% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return

Calamos Advisors's RGEN Position: Q1 2026 in Review

Calamos Advisors sold out of Repligen (RGEN) in Q1 2026, closing a stake of 3,362 shares — an estimated $551K sold.

Calamos Advisors first reported a position in RGEN in Q3 2019 and held it in 10 quarters. The position peaked at $3M in Q4 2020. 443 funds tracked by Wall St. Rank hold RGEN as of Q1 2026.

  • Calamos Advisors reported no remaining Repligen position as of Q1 2026 after selling out during the quarter.
  • Calamos Advisors sold 3,362 Repligen shares in Q1 2026, an estimated $551K.
  • Calamos Advisors first reported a position in Repligen in Q3 2019 and held it in 10 quarters.
  • Calamos Advisors's Repligen position peaked at $3M in Q4 2020.
  • 443 funds tracked by Wall St. Rank held Repligen as of Q1 2026.

Based on Calamos Advisors's 13F filing for Q1 2026, filed 4 May 2026.