Assurant, Inc.
MX ˙ BMV ˙ US04621X1081
SecurityMX:AIZ / Assurant, Inc.
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership99,888 shares
Latest Disclosed Value $ 21,756,604
Marshall Wace, Llp reports 206.27% increase in ownership of AIZ / Assurant, Inc.

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 99,888 shares of Assurant, Inc. (MX:AIZ) valued at $21,756,604 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 32,614 shares of Assurant, Inc.. This represents a change in shares of 206.27% 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)
2026-05-14 2026-03-31 13F ASSURANT COMMON STOCK 04621X108 99,888 67,274 206.27 21,757 176.97 0.0217
2026-02-13 2025-12-31 13F ASSURANT COMMON STOCK 04621X108 32,614 32,614 7,855 0.0072
2025-08-13 2025-06-30 13F ASSURANT COMMON STOCK 04621X108 0 -180,492 -100.00 0 -100.00
2025-05-15 2025-03-31 13F ASSURANT COMMON STOCK 04621X108 180,492 -1,675 -0.92 37,858 -2.53 0.0481
2025-02-13 2024-12-31 13F ASSURANT COMMON STOCK 04621X108 182,167 3,290 1.84 38,842 9.19 0.0467
2024-11-14 2024-09-30 13F ASSURANT COMMON STOCK 04621X108 178,877 -24,901 -12.22 35,571 5.00 0.0433
2024-08-14 2024-06-30 13F ASSURANT COMMON STOCK 04621X108 203,778 31,150 18.04 33,878 4.26 0.0452
2024-05-15 2024-03-31 13F ASSURANT COMMON STOCK 04621X108 172,628 172,628 32,495 0.0495
2023-11-14 2023-09-30 13F ASSURANT COMMON STOCK 04621X108 0 -57,313 -100.00 0 -100.00
2023-08-14 2023-06-30 13F ASSURANT COMMON STOCK 04621X108 57,313 47,910 509.52 7,205 538.18 0.0141
2023-05-15 2023-03-31 13F ASSURANT COMMON STOCK 04621X108 9,403 -429 -4.36 1,129 -8.14 0.0024
2023-02-14 2022-12-31 13F ASSURANT COMMON STOCK 04621X108 9,832 9,832 1,230 0.0028
2022-05-16 2022-03-31 13F ASSURANT COMMON STOCK 04621X108 0 -1,668 -100.00 0 -100.00
2022-02-14 2021-12-31 13F ASSURANT COMMON STOCK 04621X108 1,668 1,668 260 0.0005
2021-08-13 2021-06-30 13F ASSURANT COMMON STOCK 04621X108 0 -22,113 -100.00 0 -100.00
2021-05-17 2021-03-31 13F ASSURANT COMMON STOCK 04621X108 22,113 -9,115 -29.19 3,135 -26.30 0.0144
2021-02-16 2020-12-31 13F ASSURANT COMMON STOCK 04621X108 31,228 31,228 41.22 4,254 35.69 0.0231
2020-11-16 2020-09-30 13F ASSURANT COMMON STOCK 04621X108 0 -7,940 -100.00 0 -100.00
2020-08-13 2020-06-30 13F ASSURANT COMMON STOCK 04621X108 7,940 7,784 4,989.74 820 5,025.00 0.0057
2020-05-15 2020-03-31 13F ASSURANT COMMON STOCK 04621X108 156 156 -98.04 16 -98.05 0.0002
2019-11-14 2019-09-30 13F ASSURANT COMMON STOCK 04621X108 0 -94,645 -100.00 0 -100.00
2019-08-14 2019-06-30 13F ASSURANT COMMON STOCK 04621X108 94,645 71,834 314.91 10,069 365.08 0.0828
2019-05-29 2019-03-31 13F/A-1 ASSURANT COMMON STOCK 04621X108 22,811 22,811 -75.90 2,165 -78.50 0.0204
2019-05-14 2019-03-31 13F ASSURANT COMMON STOCK 04621X108 22,811 22,811 2,165
2016-02-10 2015-12-31 13F ASSURANT COMMON STOCK 04621X108 0 -3,695 -100.00 0 -100.00
2015-11-12 2015-09-30 13F ASSURANT COMMON STOCK 04621X108 3,695 -3,652 -49.71 292 -40.65 0.0036
2015-08-14 2015-06-30 13F ASSURANT COMMON STOCK 04621X108 7,347 7,347 98.84 492 68.49 0.0064
2015-02-17 2014-12-31 13F ASSURANT COMMON STOCK 04621X108 0 -151,519 -100.00 0 -100.00
2014-11-13 2014-09-30 13F ASSURANT COMMON STOCK 04621X108 151,519 151,519 9,743 0.1406
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.