Jane Street
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Jane Street’s FlexShares Disciplined Duration MBS Index Fund MBSD Stock Holding History

Jane Street’s Portfolio MBSD Stock Details MBSD Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-19,953
Closed -$415K – 12414
2025
Q4 		$415K Sell
19,953
-12,158
-38% -$254K ﹤0.01% 8118
2025
Q3 		$670K Sell
32,111
-61,222
-66% -$1.27M ﹤0.01% 7205
2025
Q2 		$1.93M Buy
93,333
+70,389
+307% +$1.44M ﹤0.01% 4470
2025
Q1 		$474K Sell
22,944
-78,277
-77% -$1.6M ﹤0.01% 6968
2024
Q4 		$2.05M Buy
101,221
+64,854
+178% +$1.33M ﹤0.01% 4061
2024
Q3 		$763K Buy
36,367
+23,388
+180% +$486K ﹤0.01% 6431
2024
Q2 		$263K Sell
12,979
-109,056
-89% -$2.2M ﹤0.01% 7997
2024
Q1 		$2.49M Buy
122,035
+28,476
+30% +$580K ﹤0.01% 3747
2023
Q4 		$1.92M Sell
93,559
-350,677
-79% -$7M ﹤0.01% 4388
2023
Q3 		$8.76M Buy
444,236
+416,612
+1,508% +$8.38M ﹤0.01% 1926
2023
Q2 		$563K Sell
27,624
-260,138
-90% -$5.33M ﹤0.01% 6131
2023
Q1 		$5.94M Buy
287,762
+60,846
+27% +$1.25M ﹤0.01% 2207
2022
Q4 		$4.62M Buy
226,916
+199,318
+722% +$4.05M ﹤0.01% 2597
2022
Q3 		$558K Sell
27,598
-47,566
-63% -$1M ﹤0.01% 6485
2022
Q2 		$1.6M Sell
75,164
-3,425
-4% -$73.1K ﹤0.01% 4584
2022
Q1 		$1.73M Buy
78,589
+13,676
+21% +$309K ﹤0.01% 5034
2021
Q4 		$1.5M Buy
+64,913
New +$1.52M ﹤0.01% 5076
2021
Q3 		– Sell
-21,604
Closed -$510K – 10398
2021
Q2 		$510K Sell
21,604
-16,978
-44% -$402K ﹤0.01% 7194
2021
Q1 		$921K Buy
38,582
+21,069
+120% +$505K ﹤0.01% 5613
2020
Q4 		$421K Sell
17,513
-42,778
-71% -$1.03M ﹤0.01% 5973
2020
Q3 		$1.46M Sell
60,291
-4,019
-6% -$97.1K ﹤0.01% 3504
2020
Q2 		$1.55M Sell
64,310
-90,020
-58% -$2.17M ﹤0.01% 3417
2020
Q1 		$3.67M Buy
154,330
+130,927
+559% +$3.1M ﹤0.01% 1429
2019
Q4 		$549K Buy
+23,403
New +$551K ﹤0.01% 3582
2019
Q3 		– Sell
-19,858
Closed -$466K – 5493
2019
Q2 		$466K Sell
19,858
-354,056
-95% -$8.24M ﹤0.01% 3672
2019
Q1 		$8.71M Buy
+373,914
New +$8.63M 0.01% 768
2018
Q4 		– Sell
-130,863
Closed -$3M – 5396
2018
Q3 		$3M Buy
130,863
+103,963
+386% +$2.39M 0.01% 1495
2018
Q2 		$620K Sell
26,900
-9,714
-27% -$225K ﹤0.01% 3345
2018
Q1 		$857K Sell
36,614
-38,990
-52% -$911K ﹤0.01% 2865
2017
Q4 		$1.78M Buy
75,604
+33,847
+81% +$805K 0.01% 1706
2017
Q3 		$999K Sell
41,757
-5,643
-12% -$135K ﹤0.01% 2308
2017
Q2 		$1.14M Buy
47,400
+3,248
+7% +$78.1K ﹤0.01% 2077
2017
Q1 		$1.06M Buy
44,152
+6,396
+17% +$154K ﹤0.01% 2011
2016
Q4 		$911K Buy
+37,756
New +$924K ﹤0.01% 2188

Other funds holding MBSD

Northern Trust
Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return
CNBT
Cornerstone National Bank & Trust Palatine, Illinois $271M AUM 11.79% 1-Year Est. Return
CCA
Cottonwood Capital Advisors Salt Lake City, Utah $142M AUM 18.94% 1-Year Est. Return
MOS
MGO One Seven Beachwood, Ohio $4.98B AUM 22.72% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return
CW
CreativeOne Wealth Overland Park, Kansas $4.31B AUM 19.42% 1-Year Est. Return
BCM
Boltwood Capital Management Walnut Creek, California $436M AUM 24% 1-Year Est. Return
TAM
Titleist Asset Management San Antonio, Texas $1.49B AUM 22.27% 1-Year Est. Return
Wealth Enhancement Advisory Services
Wealth Enhancement Advisory Services Plymouth, Minnesota $59.8B AUM 29.42% 1-Year Est. Return
SA
Sanctuary Advisors Indianapolis, Indiana $18.5B AUM 23.32% 1-Year Est. Return

Jane Street's MBSD Position: Q1 2026 in Review

Jane Street sold out of FlexShares Disciplined Duration MBS Index Fund (MBSD) in Q1 2026, closing a stake of 19,953 shares — an estimated $415K sold.

Jane Street first reported a position in MBSD in Q4 2016 and held it in 34 quarters. The position peaked at $8.76M in Q3 2023. 32 funds tracked by Wall St. Rank hold MBSD as of Q1 2026.

  • Jane Street reported no remaining FlexShares Disciplined Duration MBS Index Fund position as of Q1 2026 after selling out during the quarter.
  • Jane Street sold 19,953 FlexShares Disciplined Duration MBS Index Fund shares in Q1 2026, an estimated $415K.
  • Jane Street first reported a position in FlexShares Disciplined Duration MBS Index Fund in Q4 2016 and held it in 34 quarters.
  • Jane Street's FlexShares Disciplined Duration MBS Index Fund position peaked at $8.76M in Q3 2023.
  • 32 funds tracked by Wall St. Rank held FlexShares Disciplined Duration MBS Index Fund as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.