Assurant, Inc.
MX ˙ BMV ˙ US04621X1081
SecurityMX:AIZ / Assurant, Inc.
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership124,241 shares
Latest Disclosed Value $ 27,060,932
Robeco Institutional Asset Management B.V. reports 33.19% decrease in ownership of AIZ / Assurant, Inc.

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 124,241 shares of Assurant, Inc. (MX:AIZ) valued at $27,060,932 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 185,949 shares of Assurant, Inc.. This represents a change in shares of -33.19% during the quarter.

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)
2026-04-21 2026-03-31 13F ASSURANT COM 04621X108 124,241 -61,708 -33.19 27,061 -39.58 0.0386
2026-01-23 2025-12-31 13F ASSURANT COM 04621X108 185,949 26,678 16.75 44,786 29.82 0.0638
2025-10-22 2025-09-30 13F ASSURANT COM 04621X108 159,271 -23,615 -12.91 34,498 -4.49 0.0500
2025-07-18 2025-06-30 13F ASSURANT COM 04621X108 182,886 -27,250 -12.97 36,118 -18.06 0.0584
2025-04-23 2025-03-31 13F ASSURANT COM 04621X108 210,136 57,201 37.40 44,076 35.17 0.0856
2025-01-23 2024-12-31 13F ASSURANT COM 04621X108 152,935 -28,935 -15.91 32,609 -9.84 0.0618
2024-10-29 2024-09-30 13F ASSURANT COM 04621X108 181,870 -75,088 -29.22 36,167 -15.34 0.0718
2024-07-23 2024-06-30 13F ASSURANT COM 04621X108 256,958 88,560 52.59 42,719 34.76 0.0919
2024-04-24 2024-03-31 13F ASSURANT COM 04621X108 168,398 93,972 126.26 31,699 152.78 0.0689
2024-02-14 2023-12-31 13F/A-1 ASSURANT COM 04621X108 74,426 67,651 998.54 12,540 1,190.12 0.0304
2024-02-08 2023-12-31 13F ASSURANT COM 04621X108 39,615 32,840 74 0.0139
2023-10-24 2023-09-30 13F ASSURANT COM 04621X108 6,775 6,775 973 0.0026
2023-07-24 2023-06-30 13F ASSURANT COM 04621X108 0 -969 -100.00 0 -100.00
2023-05-04 2023-03-31 13F ASSURANT COM 04621X108 969 -7,306 -88.29 116 -88.78 0.0003
2023-02-07 2022-12-31 13F ASSURANT COM 04621X108 8,275 -62,424 -88.30 1,035 -89.93 0.0030
2022-12-01 2022-09-30 13F/A-1 ASSURANT COM 04621X108 70,699 11,664 19.76 10,269 0.64 0.0332
2022-10-27 2022-09-30 13F ASSURANT COM 04621X108 70,699 11,664 10,269 0.0327
2022-12-01 2022-06-30 13F/A-1 ASSURANT COM 04621X108 59,035 43,717 285.40 10,204 266.26 0.0317
2022-07-27 2022-06-30 13F ASSURANT COM 04621X108 59,035 43,717 10,204 0.0313
2022-12-01 2022-03-31 13F/A-1 ASSURANT COM 04621X108 15,318 12,252 399.61 2,786 482.85 0.0066
2022-04-26 2022-03-31 13F ASSURANT COM 04621X108 15,318 12,252 2,786 0.0065
2022-12-01 2021-12-31 13F/A-1 ASSURANT COM 04621X108 3,066 -1,429 -31.79 478 -32.58 0.0010
2022-01-31 2021-12-31 13F ASSURANT COM 04621X108 3,066 -1,429 478 0.0010
2022-12-01 2021-09-30 13F/A-1 ASSURANT COM 04621X108 4,495 642 16.66 709 17.77 0.0016
2021-10-20 2021-09-30 13F ASSURANT COM 04621X108 4,495 642 709 0.0016
2022-12-01 2021-06-30 13F/A-1 ASSURANT COM 04621X108 3,853 -1,978 -33.92 602 -27.21 0.0013
2021-07-28 2021-06-30 13F ASSURANT COM 04621X108 3,853 -1,978 602 0.0013
2022-12-01 2021-03-31 13F/A-1 ASSURANT COM 04621X108 5,831 585 11.15 827 15.83 0.0020
2021-04-23 2021-03-31 13F ASSURANT COM 04621X108 5,831 585 827 0.0020
2022-12-01 2020-12-31 13F/A-1 ASSURANT COM 04621X108 5,246 5,246 714 0.0019
2021-01-28 2020-12-31 13F ASSURANT COM 04621X108 5,246 5,246 714 0.0019
2021-01-19 2020-09-30 13F/A-1 ASSURANT COM 04621X108 0 -23,981 -100.00 0 -100.00
2021-01-19 2020-06-30 13F/A-1 ASSURANT COM 04621X108 23,981 20,189 532.41 2,477 527.09 0.0084
2020-07-20 2020-06-30 13F ASSURANT COM 04621X108 23,981 20,189 2,477 8,404.9028
2021-01-19 2020-03-31 13F/A-1 ASSURANT COM 04621X108 3,792 0 0.00 395 -20.52 0.0016
2020-04-30 2020-03-31 13F ASSURANT COM 04621X108 3,792 0 395 1,583.2491
2021-01-19 2019-12-31 13F/A-1 ASSURANT COM 04621X108 3,792 2,369 166.48 497 177.65 0.0016
2020-02-06 2019-12-31 13F ASSURANT COM 04621X108 3,792 2,369 497 1,589.6163
2021-01-19 2019-09-30 13F/A-1 ASSURANT COM 04621X108 1,423 445 45.50 179 72.12 0.0006
2019-10-17 2019-09-30 13F ASSURANT COM 04621X108 1,423 445 179 631.0486
2021-01-19 2019-06-30 13F/A-1 ASSURANT COM 04621X108 978 0 0.00 104 11.83 0.0004
2019-07-19 2019-06-30 13F ASSURANT COM 04621X108 978 0 104 366.7312
2021-01-19 2019-03-31 13F/A-1 ASSURANT COM 04621X108 978 0 0.00 93 6.90 0.0003
2019-05-02 2019-03-31 13F ASSURANT COM 04621X108 978 0 93 341.4629
2021-01-19 2018-12-31 13F/A-1 ASSURANT COM 04621X108 978 -16,959 -94.55 87 -95.51 0.0004
2019-02-08 2018-12-31 13F ASSURANT COM 04621X108 978 -16,959 87 389.9732
2021-01-19 2018-09-30 13F/A-1 ASSURANT COM 04621X108 17,937 -140,020 -88.64 1,937 -88.15 0.0077
2018-10-25 2018-09-30 13F ASSURANT COM 04621X108 17,937 -140,020 1,937
2021-01-19 2018-06-30 13F/A-1 ASSURANT COM 04621X108 157,957 373 0.24 16,346 13.48 0.0745
2018-08-03 2018-06-30 13F ASSURANT COM 04621X108 157,957 373 16,346
2021-01-19 2018-03-31 13F/A-1 ASSURANT COM 04621X108 157,584 16,173 11.44 14,404 1.00 0.0676
2018-05-07 2018-03-31 13F ASSURANT COM 04621X108 157,584 16,173 14,404 67,360.7700
2021-01-19 2017-12-31 13F/A-1 ASSURANT COM 04621X108 141,411 18,440 15.00 14,261 21.44 0.0739
2018-01-25 2017-12-31 13F ASSURANT COM 04621X108 141,411 18,440 14,261
2021-01-19 2017-09-30 13F/A-1 ASSURANT COM 04621X108 122,971 17,560 16.66 11,743 7.42 0.0729
2017-10-17 2017-09-30 13F ASSURANT COM 04621X108 122,971 17,560 11,743 72,752.0046
2021-01-19 2017-06-30 13F/A-1 ASSURANT COM 04621X108 105,411 11,364 12.08 10,932 21.51 0.0704
2017-08-07 2017-06-30 13F ASSURANT COM 04621X108 105,411 11,364 10,932 71,176.1243
2021-01-19 2017-03-31 13F/A-1 ASSURANT COM 04621X108 94,047 5,546 6.27 8,997 9.49 0.0599
2017-05-15 2017-03-31 13F ASSURANT COM 04621X108 94,047 5,546 8,997 59,757.5307
2017-02-09 2016-12-31 13F ASSURANT COM 04621X108 88,501 -15,264 -14.71 8,217 -14.16 0.0643
2016-11-07 2016-09-30 13F ASSURANT COM 04621X108 103,765 1,973 1.94 9,572 8.95 0.0708
2016-07-22 2016-06-30 13F ASSURANT COM 04621X108 101,792 0 0.00 8,786 11.90 0.0666
2016-05-16 2016-03-31 13F ASSURANT COM 04621X108 101,792 1,772 1.77 7,852 -2.51 0.0630
2016-02-08 2015-12-31 13F ASSURANT COM 04621X108 100,020 29,457 41.75 8,054 44.44 0.0689
2015-11-12 2015-09-30 13F ASSURANT COM 04621X108 70,563 -2,356 -3.23 5,576 14.12 0.0425
2015-08-17 2015-06-30 13F ASSURANT COM 04621X108 72,919 -19,701 -21.27 4,886 -14.08 0.0371
2015-04-24 2015-03-31 13F ASSURANT COM 04621X108 92,620 28,700 44.90 5,687 30.05 0.0428
2015-02-12 2014-12-31 13F ASSURANT COM 04621X108 63,920 2,124 3.44 4,373 10.07 0.0314
2014-11-10 2014-09-30 13F ASSURANT COM 04621X108 61,796 11,551 22.99 3,973 20.58 0.0284
2014-08-13 2014-06-30 13F ASSURANT COM 04621X108 50,245 1,944 4.02 3,295 5.00 0.0236
2014-05-07 2014-03-31 13F ASSURANT COM 04621X108 48,301 28,247 140.85 3,138 135.94 0.0241
2014-02-04 2013-12-31 13F ASSURANT COM 04621X108 20,054 -39 -0.19 1,330 22.36 0.0111
2013-11-12 2013-09-30 13F ASSURANT COM 04621X108 20,093 -1,973 -8.94 1,087 -3.21 0.0106
2013-08-27 2013-06-30 13F Assurant COM 04621X108 22,066 22,066 1,123 0.0114
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.