Jane Street
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Jane Street’s Seres Therapeutics MCRB Stock Holding History

Jane Street’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
2023
Q3 		– Sell
-2,635
Closed -$252K – 9076
2023
Q2 		$252K Buy
2,635
+1,830
+227% +$199K ﹤0.01% 7376
2023
Q1 		$91.3K Sell
805
-2,200
-73% -$238K ﹤0.01% 8267
2022
Q4 		$337K Buy
+3,005
New +$403K ﹤0.01% 6817
2022
Q1 		– Sell
-4,770
Closed -$795K – 10728
2021
Q4 		$795K Buy
4,770
+660
+16% +$105K ﹤0.01% 6372
2021
Q3 		$572K Buy
4,110
+2,315
+129% +$453K ﹤0.01% 7028
2021
Q2 		$856K Buy
1,795
+925
+106% +$390K ﹤0.01% 6172
2021
Q1 		$358K Buy
+870
New +$401K ﹤0.01% 7405
2020
Q4 		– Sell
-2,260
Closed -$1.28M – 7849
2020
Q3 		$1.28M Buy
+2,260
New +$752K ﹤0.01% 3692

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 $29.1B AUM 22.79% 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

Jane Street's MCRB Position: Q1 2025 in Review

Jane Street sold out of Seres Therapeutics (MCRB) in Q1 2025, closing a stake of 2,937 shares — an estimated $48.8K sold.

Jane Street first reported a position in MCRB in Q2 2019 and held it in 21 quarters. The position peaked at $2.24M in Q2 2021. 63 funds tracked by Wall St. Rank hold MCRB as of Q1 2025.

  • Jane Street reported no remaining Seres Therapeutics position as of Q1 2025 after selling out during the quarter.
  • Jane Street sold 2,937 Seres Therapeutics shares in Q1 2025, an estimated $48.8K.
  • Jane Street first reported a position in Seres Therapeutics in Q2 2019 and held it in 21 quarters.
  • Jane Street's Seres Therapeutics position peaked at $2.24M in Q2 2021.
  • 63 funds tracked by Wall St. Rank held Seres Therapeutics as of Q1 2025.

Based on Jane Street's 13F filing for Q1 2025, filed 14 May 2025.