Group One Trading
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Group One Trading’s Seres Therapeutics MCRB Stock Holding History

Group One Trading’s Portfolio MCRB Stock Details MCRB Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$7.31K Buy
+824
New +$9.65K ﹤0.01% 6536
2025
Q3 		– Sell
-1,161
Closed -$18.5K – 8827
2025
Q2 		$12.9K Buy
1,161
+26
+2% +$229 ﹤0.01% 6567
2025
Q1 		$15.9K Buy
1,135
+317
+39% +$4.96K ﹤0.01% 5967
2024
Q4 		$13.6K Sell
818
-8,858
-92% -$144K ﹤0.01% 5932
2024
Q3 		$183K Buy
9,676
+4,113
+74% +$83.4K ﹤0.01% 3697
2024
Q2 		$80.5K Buy
5,563
+2,624
+89% +$43.8K ﹤0.01% 4134
2024
Q1 		$45.5K Sell
2,939
-624
-18% -$13.5K ﹤0.01% 4796
2023
Q4 		$99.8K Buy
+3,563
New +$93.6K ﹤0.01% 4473
2023
Q2 		– Sell
-1,505
Closed -$164K – 7979
2023
Q1 		$171K Buy
1,505
+144
+11% +$15.6K ﹤0.01% 3810
2022
Q4 		$152K Buy
1,361
+720
+112% +$96.5K ﹤0.01% 4080
2022
Q3 		$82K Sell
641
-310
-33% -$31.7K ﹤0.01% 4955
2022
Q2 		$65K Sell
951
-2,197
-70% -$189K ﹤0.01% 5342
2022
Q1 		$448K Buy
3,148
+310
+11% +$47.7K ﹤0.01% 3931
2021
Q4 		$473K Buy
2,838
+1,488
+110% +$236K ﹤0.01% 4190
2021
Q3 		$188K Sell
1,350
-110
-8% -$21.5K ﹤0.01% 5238
2021
Q2 		$696K Sell
1,460
-1,638
-53% -$691K ﹤0.01% 3845
2021
Q1 		$1.28M Buy
3,098
+893
+40% +$411K ﹤0.01% 2949
2020
Q4 		$1.08M Buy
+2,205
New +$1.29M ﹤0.01% 2576
2018
Q2 		– Sell
-101
Closed -$16.5K – 5313
2018
Q1 		$15K Buy
+101
New +$19.4K ﹤0.01% 4183
2017
Q4 		– Sell
-123
Closed -$25.3K – 5056
2017
Q3 		$40K Buy
+123
New +$33.6K ﹤0.01% 3748

Other funds holding MCRB

FP
Flagship Pioneering Cambridge, Massachusetts $1.16B AUM 67.93% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Marshall Wace
Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return
Vontobel Holding
Vontobel Holding Zurich, Switzerland $31.4B AUM 31.97% 1-Year Est. Return
Susquehanna International Group
Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
VFT
Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Group One Trading's MCRB Position: Q1 2026 in Review

Group One Trading opened a new position in Seres Therapeutics (MCRB) in Q1 2026: 824 shares worth $7.31K. The stake represents ﹤0.01% of the portfolio and ranks #6536 among its holdings. This is a return to the name: Group One Trading previously reported a position in MCRB as recently as Q2 2025.

Group One Trading first reported a position in MCRB in Q3 2017 and has held it in 20 quarters since. The position peaked at $1.28M in Q1 2021. 33 funds tracked by Wall St. Rank hold MCRB as of Q1 2026.

  • Group One Trading held 824 shares of Seres Therapeutics worth $7.31K as of Q1 2026.
  • Seres Therapeutics was a new Group One Trading position in Q1 2026.
  • Seres Therapeutics made up ﹤0.01% of Group One Trading's portfolio in Q1 2026, its #6536 holding.
  • Group One Trading first reported a position in Seres Therapeutics in Q3 2017 and has held it in 20 quarters since.
  • Group One Trading's Seres Therapeutics position peaked at $1.28M in Q1 2021.
  • 33 funds tracked by Wall St. Rank held Seres Therapeutics as of Q1 2026.

Based on Group One Trading's 13F filing for Q1 2026, filed 13 May 2026.