Generac Holdings Inc.
MX ˙ BMV ˙ US3687361044
SecurityMX:GNRC / Generac Holdings Inc.
InstitutionMarshall Wace, Llp
Latest Disclosed Ownership86,892 shares
Latest Disclosed Value $ 16,972,614
Marshall Wace, Llp reports 148.75% increase in ownership of GNRC / Generac Holdings Inc.

On May 14, 2026 - Marshall Wace, Llp filed a 13F-HR form disclosing ownership of 86,892 shares of Generac Holdings Inc. (MX:GNRC) valued at $16,972,614 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 34,932 shares of Generac Holdings Inc.. This represents a change in shares of 148.75% 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 GENERAC HOLDINGS COMMON STOCK 368736104 86,892 51,960 148.75 16,973 256.33 0.0080
2026-02-13 2025-12-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 34,932 34,932 4,764 0.0043
2025-11-13 2025-09-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 0 -58,139 -100.00 0 -100.00
2025-08-13 2025-06-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 58,139 -17,674 -23.31 8,326 -13.28 0.0094
2025-05-15 2025-03-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 75,813 16,600 28.03 9,602 4.59 0.0122
2025-02-13 2024-12-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 59,213 -32,095 -35.15 9,181 -36.72 0.0110
2024-11-14 2024-09-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 91,308 43,945 92.78 14,507 131.67 0.0177
2024-08-14 2024-06-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 47,363 -127,377 -72.90 6,262 -71.59 0.0084
2024-05-15 2024-03-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 174,740 99,530 132.34 22,042 126.76 0.0336
2024-02-14 2023-12-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 75,210 -52,129 -40.94 9,720 -29.94 0.0165
2023-11-14 2023-09-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 127,339 121,029 1,918.05 13,875 1,374.39 0.0281
2023-08-14 2023-06-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 6,310 100 1.61 941 40.45 0.0018
2023-05-15 2023-03-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 6,210 -400 -6.05 671 0.75 0.0014
2023-02-14 2022-12-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 6,610 3,637 122.33 665 25.71 0.0015
2022-11-14 2022-09-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 2,973 -6,733 -69.37 529 -74.11 0.0012
2022-08-15 2022-06-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 9,706 9,706 2,043 0.0042
2022-05-16 2022-03-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 0 -1,591 -100.00 0 -100.00
2022-02-14 2021-12-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 1,591 532 50.24 561 29.56 0.0010
2021-11-15 2021-09-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 1,059 1,059 433 0.0018
2021-08-13 2021-06-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 0 -16,611 -100.00 0 -100.00
2021-05-17 2021-03-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 16,611 12,773 332.80 5,439 523.02 0.0249
2021-02-16 2020-12-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 3,838 1,090 39.67 873 64.10 0.0047
2020-11-16 2020-09-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 2,748 -13,825 -83.42 532 -73.66 0.0034
2020-08-13 2020-06-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 16,573 16,573 503.09 2,020 279.70 0.0142
2019-08-14 2019-06-30 13F GENERAC HOLDINGS COMMON STOCK 368736104 0 -61,030 -100.00 0 -100.00
2019-05-29 2019-03-31 13F/A-1 GENERAC HOLDINGS COMMON STOCK 368736104 61,030 -73,217 -54.54 3,127 -53.13 0.0294
2019-05-14 2019-03-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 61,030 -73,217 3,127
2019-02-14 2018-12-31 13F GENERAC HOLDINGS COMMON STOCK 368736104 134,247 134,247 6,672 0.0681
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.