Loomis, Sayles & Company
RGEN icon

Loomis, Sayles & Company’s Repligen RGEN Stock Holding History

Loomis, Sayles & Company’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 		$18M Buy
152,585
+2,808
+2% +$392K 0.02% 252
2025
Q4 		$24.5M Sell
149,777
-18,274
-11% -$2.86M 0.03% 206
2025
Q3 		$22.5M Buy
168,051
+63,205
+60% +$7.68M 0.03% 223
2025
Q2 		$13M Buy
+104,846
New +$13.3M 0.02% 318
2022
Q3 		– Sell
-11
Closed -$2K – 1032
2022
Q2 		$2K Hold
11
– – ﹤0.01% 876
2022
Q1 		$2K Buy
+11
New +$2.09K ﹤0.01% 965
2021
Q2 		– Sell
-58
Closed -$11K – 892
2021
Q1 		$11K Sell
58
-285,720
-100% -$58.6M ﹤0.01% 765
2020
Q4 		$54.8M Sell
285,778
-56,134
-16% -$10.2M 0.07% 120
2020
Q3 		$50.4M Buy
341,912
+6,492
+2% +$928K 0.07% 110
2020
Q2 		$41.5M Buy
335,420
+29,131
+10% +$3.43M 0.07% 110
2020
Q1 		$29.6M Buy
306,289
+30,614
+11% +$2.96M 0.06% 119
2019
Q4 		$25.5M Sell
275,675
-104,903
-28% -$8.81M 0.04% 176
2019
Q3 		$29.2M Buy
380,578
+97,839
+35% +$8.56M 0.06% 151
2019
Q2 		$24.3M Buy
+282,739
New +$19.3M 0.05% 182
2018
Q4 		– Sell
-171
Closed -$9K – 916
2018
Q3 		$9K Sell
171
-26
-13% -$1.34K ﹤0.01% 823
2018
Q2 		$9K Buy
197
+15
+8% +$617 ﹤0.01% 809
2018
Q1 		$7K Hold
182
– – ﹤0.01% 843
2017
Q4 		$7K Hold
182
– – ﹤0.01% 817
2017
Q3 		$7K Sell
182
-41
-18% -$1.72K ﹤0.01% 820
2017
Q2 		$9K Hold
223
– – ﹤0.01% 807
2017
Q1 		$8K Hold
223
– – ﹤0.01% 828
2016
Q4 		$7K Buy
223
+92
+70% +$2.85K ﹤0.01% 874
2016
Q3 		$4K Sell
131
-110
-46% -$3.32K ﹤0.01% 920
2016
Q2 		$7K Sell
241
-85
-26% -$2.17K ﹤0.01% 803
2016
Q1 		$9K Buy
326
+284
+676% +$6.95K ﹤0.01% 845
2015
Q4 		$1K Buy
+42
New +$1.21K ﹤0.01% 1024

Other funds holding RGEN

BlackRock
BlackRock New York $5.72T AUM 30.48% 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 $2.9T AUM 29.55% 1-Year Est. Return
Bank of New York Mellon
Bank of New York Mellon New York $544B AUM 28.31% 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 $298B AUM 21.96% 1-Year Est. Return

Loomis, Sayles & Company's RGEN Position: Q1 2026 in Review

Loomis, Sayles & Company increased its Repligen (RGEN) stake by 1.9% in Q1 2026, buying an estimated $392K and bringing the position to 152,585 shares worth $18M. The position accounts for 0.02% of the portfolio, ranked #252.

Loomis, Sayles & Company first reported a position in RGEN in Q4 2015 and has held it in 26 quarters since. The position peaked at $54.8M in Q4 2020. 441 funds tracked by Wall St. Rank hold RGEN as of Q1 2026.

  • Loomis, Sayles & Company held 152,585 shares of Repligen worth $18M as of Q1 2026.
  • Loomis, Sayles & Company bought 2,808 Repligen shares in Q1 2026, an estimated $392K.
  • Repligen made up 0.02% of Loomis, Sayles & Company's portfolio in Q1 2026, its #252 holding.
  • Loomis, Sayles & Company first reported a position in Repligen in Q4 2015 and has held it in 26 quarters since.
  • Loomis, Sayles & Company's Repligen position peaked at $54.8M in Q4 2020.
  • 441 funds tracked by Wall St. Rank held Repligen as of Q1 2026.

Based on Loomis, Sayles & Company's 13F filing for Q1 2026, filed 14 May 2026.