Zillow Group, Inc.
MX ˙ BMV ˙ US98954M2008
SecurityMX:Z / Zillow Group, Inc.
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership42,905 shares
Latest Disclosed Value $ 1,775,408
Marshall Wace, Llp reports 238.31% increase in ownership of Z / Zillow Group, Inc.

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 42,905 shares of Zillow Group, Inc. (MX:Z) valued at $1,775,408 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 12,682 shares of Zillow Group, Inc.. This represents a change in shares of 238.31% 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 ZILLOW GRO-C COMMON STOCK 98954M200 42,905 30,223 238.31 1,775 105.20 0.0018
2026-02-13 2025-12-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 12,682 12,682 865 0.0008
2025-11-13 2025-09-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 0 -13,738 -100.00 0 -100.00
2025-08-13 2025-06-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 13,738 -877,008 -98.46 962 -98.42 0.0011
2025-05-15 2025-03-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 890,746 823,039 1,215.59 61,070 1,118.21 0.0775
2025-02-13 2024-12-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 67,707 -144,119 -68.04 5,014 -62.94 0.0060
2024-11-14 2024-09-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 211,826 115,946 120.93 13,525 204.14 0.0165
2024-08-14 2024-06-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 95,880 -240,678 -71.51 4,448 -72.91 0.0059
2024-05-15 2024-03-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 336,558 -671,689 -66.62 16,417 -71.86 0.0250
2024-02-14 2023-12-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 1,008,247 940,044 1,378.30 58,337 1,753.14 0.0988
2023-11-14 2023-09-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 68,203 -480,358 -87.57 3,148 -88.58 0.0064
2023-08-14 2023-06-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 548,561 304,224 124.51 27,571 153.75 0.0538
2023-05-15 2023-03-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 244,337 -84,246 -25.64 10,866 2.66 0.0231
2023-02-14 2022-12-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 328,583 272,179 482.55 10,584 556.11 0.0238
2022-11-14 2022-09-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 56,404 -880,405 -93.98 1,613 -94.58 0.0035
2022-08-15 2022-06-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 936,809 470,199 100.77 29,744 29.33 0.0612
2022-05-16 2022-03-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 466,610 443,112 1,885.74 22,999 1,010.53 0.0436
2021-11-15 2021-09-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 23,498 -182,436 -88.59 2,071 -91.77 0.0086
2021-08-13 2021-06-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 205,934 185,977 931.89 25,170 871.81 0.1226
2021-02-16 2020-12-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 19,957 -74,255 -78.82 2,590 -72.94 0.0140
2020-11-16 2020-09-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 94,212 -106,297 -53.01 9,571 -17.13 0.0613
2020-08-13 2020-06-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 200,509 200,509 11,550 0.0809
2020-02-14 2019-12-31 13F ZILLOW GRO-C COMMON STOCK 98954M200 0 -26,142 -100.00 0 -100.00
2019-11-14 2019-09-30 13F ZILLOW GRO-C COMMON STOCK 98954M200 26,142 26,142 779 0.0061
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.