Citadel Advisors’s Repligen RGEN Stock Holding History
Bought
Maintained
Sold
| Quarter | Market Value | Status | Shares |
Change in Stake | Trade Value | Portfolio Weight | Portfolio Position | |
|---|---|---|---|---|---|---|---|---|
|
2026
Q1 | $4.67M | Buy |
39,600
+11,100
| +39% | +$1.55M | ﹤0.01% | 4456 |
|
|
2025
Q4 | $4.67M | Sell |
28,500
-6,600
| -19% | -$1.03M | ﹤0.01% | 4394 |
|
|
2025
Q3 | $4.69M | Buy |
35,100
+8,400
| +31% | +$1.02M | ﹤0.01% | 4475 |
|
|
2025
Q2 | $3.32M | Buy |
26,700
+1,700
| +7% | +$216K | ﹤0.01% | 4807 |
|
|
2025
Q1 | $3.18M | Sell |
25,000
-31,000
| -55% | -$4.77M | ﹤0.01% | 4660 |
|
|
2024
Q4 | $8.06M | Sell |
56,000
-1,000
| -2% | -$143K | ﹤0.01% | 3255 |
|
|
2024
Q3 | $8.48M | Sell |
57,000
-46,800
| -45% | -$6.71M | ﹤0.01% | 3165 |
|
|
2024
Q2 | $13.1M | Sell |
103,800
-96,000
| -48% | -$15M | ﹤0.01% | 2461 |
|
|
2024
Q1 | $36.7M | Buy |
199,800
+143,200
| +253% | +$27.3M | 0.01% | 1464 |
|
|
2023
Q4 | $10.2M | Buy |
56,600
+37,700
| +199% | +$5.87M | ﹤0.01% | 2818 |
|
|
2023
Q3 | $3.01M | Sell |
18,900
-1,000
| -5% | -$163K | ﹤0.01% | 4482 |
|
|
2023
Q2 | $2.82M | Sell |
19,900
-15,400
| -44% | -$2.47M | ﹤0.01% | 4579 |
|
|
2023
Q1 | $5.94M | Sell |
35,300
-30,500
| -46% | -$5.44M | ﹤0.01% | 3526 |
|
|
2022
Q4 | $11.1M | Buy |
65,800
+13,400
| +26% | +$2.43M | ﹤0.01% | 2678 |
|
|
2022
Q3 | $9.8M | Buy |
52,400
+10,700
| +26% | +$2.26M | ﹤0.01% | 2798 |
|
|
2022
Q2 | $6.77M | Sell |
41,700
-12,600
| -23% | -$1.99M | ﹤0.01% | 3255 |
|
|
2022
Q1 | $10.2M | Buy |
54,300
+10,800
| +25% | +$2.05M | ﹤0.01% | 2920 |
|
|
2021
Q4 | $11.5M | Sell |
43,500
-21,900
| -33% | -$5.9M | ﹤0.01% | 2830 |
|
|
2021
Q3 | $18.9M | Buy |
65,400
+35,200
| +117% | +$9.03M | ﹤0.01% | 2078 |
|
|
2021
Q2 | $6.03M | Sell |
30,200
-20,600
| -41% | -$4M | ﹤0.01% | 4056 |
|
|
2021
Q1 | $9.88M | Sell |
50,800
-700
| -1% | -$144K | ﹤0.01% | 2975 |
|
|
2020
Q4 | $9.87M | Buy |
51,500
+28,400
| +123% | +$5.17M | ﹤0.01% | 2653 |
|
|
2020
Q3 | $3.41M | Buy |
23,100
+2,800
| +14% | +$400K | ﹤0.01% | 3767 |
|
|
2020
Q2 | $2.51M | Sell |
20,300
-5,500
| -21% | -$647K | ﹤0.01% | 4160 |
|
|
2020
Q1 | $2.49M | Buy |
25,800
+11,900
| +86% | +$1.15M | ﹤0.01% | 3793 |
|
|
2019
Q4 | $1.29M | Sell |
13,900
-8,700
| -38% | -$731K | ﹤0.01% | 5142 |
|
|
2019
Q3 | $1.73M | Sell |
22,600
-8,900
| -28% | -$778K | ﹤0.01% | 4714 |
|
|
2019
Q2 | $2.71M | Buy |
31,500
+15,100
| +92% | +$1.03M | ﹤0.01% | 4029 |
|
|
2019
Q1 | $969K | Sell |
16,400
-8,300
| -34% | -$477K | ﹤0.01% | 5646 |
|
|
2018
Q4 | $1.3M | Sell |
24,700
-200
| -0.8% | -$11.7K | ﹤0.01% | 4881 |
|
|
2018
Q3 | $1.38M | Buy |
24,900
+13,700
| +122% | +$706K | ﹤0.01% | 4999 |
|
|
2018
Q2 | $527K | Buy |
+11,200
| New | +$461K | ﹤0.01% | 6275 |
|
|
2017
Q4 | – | Sell |
-13,000
| Closed | -$498K | – | 8358 |
|
|
2017
Q3 | $498K | Buy |
13,000
+4,600
| +55% | +$193K | ﹤0.01% | 5333 |
|
|
2017
Q2 | $348K | Buy |
+8,400
| New | +$319K | ﹤0.01% | 5666 |
|
|
2016
Q4 | – | Sell |
-7,500
| Closed | -$226K | – | 7740 |
|
|
2016
Q3 | $226K | Buy |
+7,500
| New | +$226K | ﹤0.01% | 6141 |
|
|
2016
Q2 | – | Sell |
-12,600
| Closed | -$338K | – | 7300 |
|
|
2016
Q1 | $338K | Buy |
12,600
+1,400
| +13% | +$34.3K | ﹤0.01% | 4936 |
|
|
2015
Q4 | $317K | Buy |
11,200
+1,200
| +12% | +$34.6K | ﹤0.01% | 5136 |
|
|
2015
Q3 | $279K | Sell |
10,000
-1,300
| -12% | -$47K | ﹤0.01% | 5678 |
|
|
2015
Q2 | $466K | Buy |
11,300
+300
| +3% | +$11K | ﹤0.01% | 5088 |
|
|
2015
Q1 | $334K | Buy |
11,000
+5,400
| +96% | +$140K | ﹤0.01% | 5495 |
|
|
2014
Q4 | $111K | Sell |
5,600
-6,200
| -53% | -$139K | ﹤0.01% | 6564 |
|
|
2014
Q3 | $235K | Buy |
11,800
+4,700
| +66% | +$98.9K | ﹤0.01% | 5555 |
|
|
2014
Q2 | $162K | Sell |
7,100
-3,200
| -31% | -$57K | ﹤0.01% | 5793 |
|
|
2014
Q1 | $132K | Buy |
10,300
+5,500
| +115% | +$78.9K | ﹤0.01% | 5918 |
|
|
2013
Q4 | $65K | Buy |
+4,800
| New | +$57.3K | ﹤0.01% | 5895 |
|
Other funds holding RGEN
UCFA
VCM
VPM
MC
Citadel Advisors's RGEN Position: Q1 2026 in Review
Citadel Advisors reduced its Repligen (RGEN) stake by 21% in Q1 2026, selling an estimated $41.2M and leaving 1,099,181 shares worth $130M. The position accounts for 0.02% of the portfolio, ranked #659.
Citadel Advisors first reported a position in RGEN in Q2 2013 and has held it in 48 quarters since. The position peaked at $228M in Q4 2025. 442 funds tracked by Wall St. Rank hold RGEN as of Q1 2026.
- Citadel Advisors held 1,099,181 shares of Repligen worth $130M as of Q1 2026.
- Citadel Advisors sold 295,071 Repligen shares in Q1 2026, an estimated $41.2M.
- Repligen made up 0.02% of Citadel Advisors's portfolio in Q1 2026, its #659 holding.
- Citadel Advisors first reported a position in Repligen in Q2 2013 and has held it in 48 quarters since.
- Citadel Advisors's Repligen position peaked at $228M in Q4 2025.
- 442 funds tracked by Wall St. Rank held Repligen as of Q1 2026.
Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.