FlexShares Trust - FlexShares Disciplined Duration MBS Index Fund
US ˙ ARCA ˙ US33939L7799

SecurityMBSD / FlexShares Trust - FlexShares Disciplined Duration MBS Index Fund
InstitutionNorthern Trust Corp
Latest Disclosed Ownership1,001,822 shares
Latest Disclosed Value $ 20,743,025
Northern Trust Corp reports 12.59% increase in ownership of MBSD / FlexShares Trust - FlexShares Disciplined Duration MBS Index Fund

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 1,001,822 shares of FlexShares Trust - FlexShares Disciplined Duration MBS Index Fund (US:MBSD) valued at $20,743,025 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 889,803 shares of FlexShares Trust - FlexShares Disciplined Duration MBS Index Fund. This represents a change in shares of 12.59% during the quarter. The current value of the position is $20,534,145 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F FLEXSHARES TR DISCP DUR MBS 33939L779 1,001,822 112,019 12.59 20,743 12.22 0.0006
2026-02-17 2025-12-31 13F FLEXSHARES TR DISCP DUR MBS 33939L779 889,803 22,494 2.59 18,486 2.17 0.0005
2025-11-14 2025-09-30 13F FLEXSHARES TR DISCP DUR MBS 33939L779 867,309 33,780 4.05 18,092 4.86 0.0005
2025-08-13 2025-06-30 13F FLEXSHARES TR DISCP DUR MBS 33939L779 833,529 27,144 3.37 17,254 3.63 0.0024
2025-05-13 2025-03-31 13F FLEXSHARES TR DISCP DUR MBS 33939L779 806,385 -179,235 -18.19 16,649 -16.52 0.0025
2025-02-14 2024-12-31 13F FLEXSHARES TR DISCP DUR MBS 33939L779 985,620 985,620 19,944 0.0028
2023-02-13 2022-12-31 13F FLEXSHARES TR UNDEFIND 33939L779 0 -202,000 -100.00 0 -100.00
2022-11-14 2022-09-30 13F FLEXSHARES TR UNDEFIND 33939L779 202,000 0 0.00 41 -4.65 0.0000
2022-08-12 2022-06-30 13F FLEXSHARES TR UNDEFIND 33939L779 202,000 0 0.00 43 -2.27 0.0000
2022-05-13 2022-03-31 13F FLEXSHARES TR UNDEFIND 33939L779 202,000 0 0.00 44 -6.38 0.0000
2022-02-08 2021-12-31 13F FLEXSHARES TR UNDEFIND 33939L779 202,000 0 0.00 47 0.00 0.0000
2021-11-15 2021-09-30 13F FLEXSHARES TR UNDEFIND 33939L779 202,000 -581,284 -74.21 47 -99.66 0.0000
2021-08-13 2021-06-30 13F FLEXSHARES TR DISCP DUR MBS 33939L779 783,284 -31,861 -3.91 13,760 -6.34 0.0024
2021-05-12 2021-03-31 13F FLEXSHARES TR DISCP DUR MBS 33939L779 815,145 -35,451 -4.17 14,692 -6.15 0.0027
2021-02-11 2020-12-31 13F FLEXSHARES TR DISCP DUR MBS 33939L779 850,596 -120,307 -12.39 15,654 -15.97 0.0030
2020-11-16 2020-09-30 13F FLEXSHARES TR DISCP DUR MBS 33939L779 970,903 61,503 6.76 18,629 39.45 0.0041
2020-08-14 2020-06-30 13F FLEXSHARES TR UNDEFIND 33939L779 909,400 328,733 56.61 13,359 168.85 0.0032
2020-05-14 2020-03-31 13F FLEXSHARES TR DISCP DUR MBS 33939L779 580,667 99,955 20.79 4,969 70.70 0.0014
2020-02-14 2019-12-31 13F FLEXSHARES TR DISCP DUR MBS 33939L779 480,712 278,204 137.38 2,911 4,751.67 0.0007
2019-11-13 2019-09-30 13F FLEXSHARES TR UNDEFIND 33939L779 202,508 75 0.04 60 5.26 0.0000
2019-08-13 2019-06-30 13F FLEXSHARES TR DISCP DUR MBS 33939L779 202,433 -1,389,947 -87.29 57 -98.79 0.0000
2019-05-13 2019-03-31 13F FLEXSHARES TR UNDEFIND 33939L779 1,592,380 -482,289 -23.25 4,706 -66.27 0.0012
2019-02-12 2018-12-31 13F FLEXSHARES TR UNDEFIND 33939L779 2,074,669 -17,500 -0.84 13,950 -1.41 0.0039
2018-11-14 2018-09-30 13F FLEXSHARES TR UNDEFIND 33939L779 2,092,169 787,184 60.32 14,150 20.65 0.0035
2018-09-18 2018-06-30 13F/A-1 FLEXSHARES TR UNDEFIND 33939L779 1,304,985 190,012 17.04 11,728 43.66 0.0030
2018-08-14 2018-06-30 13F FLEXSHARES TR UNDEFIND 33939L779 1,304,985 190,012 11,728
2018-05-09 2018-03-31 13F FLEXSHARES TR UNDEFIND 33939L779 1,114,973 172,665 18.32 8,164 99.71 0.0021
2018-02-14 2017-12-31 13F FLEXSHARES TR UNDEFIND 33939L779 942,308 -97,661 -9.39 4,088 210.64 0.0010
2017-11-13 2017-09-30 13F FLEXSHARES TR UNDEFIND 33939L779 1,039,969 41,780 4.19 1,316 33.88 0.0003
2017-08-11 2017-06-30 13F FLEXSHARES TR UNDEFIND 33939L779 998,189 9,033 0.91 983 15.78 0.0003
2017-05-12 2017-03-31 13F FLEXSHARES TR UNDEFIND 33939L779 989,156 5,973 0.61 849 -20.13 0.0002
2017-02-13 2016-12-31 13F FLEXSHARES TR UNDEFIND 33939L779 983,183 -308,735 -23.90 1,063 231.15 0.0003
2016-11-09 2016-09-30 13F FLEXSHARES TR UNDEFIND 33939L779 1,291,918 166,967 14.84 321 14.64 0.0001
2016-08-12 2016-06-30 13F FLEXSHARES TR UNDEFIND 33939L779 1,124,951 157,308 16.26 280 17.15 0.0001
2016-08-19 2016-03-31 13F/A-1 FLEXSHARES TR UNDEFIND 33939L779 967,643 52,137 5.69 239 3.46 0.0001
2016-05-13 2016-03-31 13F FLEXSHARES TR UNDEFIND 33939L779 967,643 239
2016-02-12 2015-12-31 13F FLEXSHARES TR UNDEFIND 33939L779 915,506 144,113 18.68 231 19.69 0.0001
2015-11-12 2015-09-30 13F FLEXSHARES TR UNDEFIND 33939L779 771,393 108,254 16.32 193 16.27 0.0001
2015-08-13 2015-06-30 13F FLEXSHARES TR UNDEFIND 33939L779 663,139 114,234 20.81 166 19.42 0.0001
2015-05-14 2015-03-31 13F FLEXSHARES TR UNDEFIND 33939L779 548,905 210,795 62.35 139 63.53 0.0000
2015-02-12 2014-12-31 13F FLEXSHARES TR UNDEFIND 33939L779 338,110 338,110 85 0.0000
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.