FlexShares Trust - FlexShares Credit-Scored US Long Corporate Bond Index Fund
US ˙ BATS ˙ US33939L7534

SecurityLKOR / FlexShares Trust - FlexShares Credit-Scored US Long Corporate Bond Index Fund
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership34,063 shares
Latest Disclosed Value $ 1,419,991
Citadel Advisors Llc reports 9.82% decrease in ownership of LKOR / FlexShares Trust - FlexShares Credit-Scored US Long Corporate Bond Index Fund

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 34,063 shares of FlexShares Trust - FlexShares Credit-Scored US Long Corporate Bond Index Fund (US:LKOR) valued at $1,419,991 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 37,771 shares of FlexShares Trust - FlexShares Credit-Scored US Long Corporate Bond Index Fund. This represents a change in shares of -9.82% during the quarter. The current value of the position is $1,415,014 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)
2026-05-15 2026-03-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 34,063 -3,708 -9.82 1,420 -11.48 0.0002
2026-02-17 2025-12-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 37,771 845 2.29 1,603 -0.06 0.0002
2025-11-14 2025-09-30 13F FLEXSHARES TR CR SCORED LONG 33939L753 36,926 6,588 21.72 1,605 24.63 0.0002
2025-08-14 2025-06-30 13F FLEXSHARES TR CR SCORED LONG 33939L753 30,338 12,547 70.52 1,287 70.46 0.0002
2025-05-15 2025-03-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 17,791 8,248 86.43 755 88.75 0.0001
2025-02-14 2024-12-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 9,543 9,543 400 0.0001
2024-11-14 2024-09-30 13F FLEXSHARES TR CR SCORED LONG 33939L753 0 -17,043 -100.00 0 -100.00
2024-08-14 2024-06-30 13F FLEXSHARES TR CR SCORED LONG 33939L753 17,043 11,508 207.91 726 200.00 0.0001
2024-05-15 2024-03-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 5,535 940 20.46 242 18.05 0.0000
2024-02-14 2023-12-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 4,595 -7,241 -61.18 205 -56.57 0.0000
2023-11-14 2023-09-30 13F FLEXSHARES TR CR SCORED LONG 33939L753 11,836 -2,239 -15.91 472 -23.00 0.0001
2023-08-14 2023-06-30 13F FLEXSHARES TR CR SCORED LONG 33939L753 14,075 -1,994 -12.41 614 -13.90 0.0001
2023-05-15 2023-03-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 16,069 -7,679 -32.34 713 -28.80 0.0002
2023-02-14 2022-12-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 23,748 -3,104 -11.56 1,001 -8.17 0.0002
2022-11-14 2022-09-30 13F FLEXSHARES TR CR SCORED LONG 33939L753 26,852 6,318 30.77 1,089 18.24 0.0002
2022-08-15 2022-06-30 13F FLEXSHARES TR CR SCORED LONG 33939L753 20,534 2,173 11.83 921 -3.76 0.0002
2022-05-16 2022-03-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 18,361 13,028 244.29 957 203.81 0.0002
2022-02-14 2021-12-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 5,333 -5,494 -50.74 315 -51.39 0.0001
2021-11-15 2021-09-30 13F FLEXSHARES TR Cmn 33939L753 10,827 10,827 648 0.0001
2021-08-16 2021-06-30 13F FLEXSHARES TR CR SCORED LONG 33939L753 0 -25,982 -100.00 0 -100.00
2021-05-21 2021-03-31 13F/A-1 FLEXSHARES TR CR SCORED LONG 33939L753 25,982 25,982 1,492 0.0004
2021-05-17 2021-03-31 13F FLEXSHARES TR CR SCORED LONG 33939L753 25,982 25,982 1,492 0.0004
2020-05-15 2020-03-31 13F FLEXSHARES TR Cmn 33939L753 0 -5,416 -100.00 0 -100.00
2020-02-14 2019-12-31 13F FLEXSHARES TR Cmn 33939L753 5,416 -26,431 -82.99 314 -82.84 0.0001
2019-11-14 2019-09-30 13F FLEXSHARES TR Cmn 33939L753 31,847 -9,490 -22.96 1,830 -19.81 0.0009
2019-08-14 2019-06-30 13F FLEXSHARES TR Cmn 33939L753 41,337 6,666 19.23 2,282 27.06 0.0010
2019-05-15 2019-03-31 13F FLEXSHARES TR Cmn 33939L753 34,671 34,671 1,796 0.0009
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.