Generac Holdings Inc.
MX ˙ BMV ˙ US3687361044
SecurityMX:GNRC / Generac Holdings Inc.
InstitutionRobeco Institutional Asset Management B.V.
Latest Disclosed Ownership8,166 shares
Latest Disclosed Value $ 1,595,065
Robeco Institutional Asset Management B.V. reports 133.31% increase in ownership of GNRC / Generac Holdings Inc.

On April 21, 2026 - Robeco Institutional Asset Management B.V. filed a 13F-HR form disclosing ownership of 8,166 shares of Generac Holdings Inc. (MX:GNRC) valued at $1,595,065 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 23, 2026 disclosing 3,500 shares of Generac Holdings Inc.. This represents a change in shares of 133.31% 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)
2026-04-21 2026-03-31 13F GENERAC HLDGS COM 368736104 8,166 4,666 133.31 1,595 234.38 0.0023
2026-01-23 2025-12-31 13F GENERAC HLDGS COM 368736104 3,500 -512 -12.76 477 -28.91 0.0007
2025-10-22 2025-09-30 13F GENERAC HLDGS COM 368736104 4,012 -35,050 -89.73 672 -88.01 0.0010
2025-07-18 2025-06-30 13F GENERAC HLDGS COM 368736104 39,062 12,611 47.68 5,594 66.99 0.0090
2025-04-23 2025-03-31 13F GENERAC HLDGS COM 368736104 26,451 -99,670 -79.03 3,350 -82.87 0.0065
2025-01-23 2024-12-31 13F GENERAC HLDGS COM 368736104 126,121 105,063 498.92 19,555 484.60 0.0371
2024-10-29 2024-09-30 13F GENERAC HLDGS COM 368736104 21,058 21,058 3,346 0.0066
2024-02-14 2023-12-31 13F/A-1 GENERAC HLDGS COM 368736104 0 -10,522 -100.00 0 -100.00
2024-02-08 2023-12-31 13F GENERAC HLDGS COM 368736104 0 -10,522 0
2023-10-24 2023-09-30 13F GENERAC HLDGS COM 368736104 10,522 0 0.00 1,146 -26.96 0.0031
2023-07-24 2023-06-30 13F GENERAC HLDGS COM 368736104 10,522 0 0.00 1,569 38.12 0.0041
2023-05-04 2023-03-31 13F GENERAC HLDGS COM 368736104 10,522 0 0.00 1,136 7.27 0.0031
2023-02-07 2022-12-31 13F GENERAC HLDGS COM 368736104 10,522 -736 -6.54 1,059 -47.21 0.0031
2022-12-01 2022-09-30 13F/A-1 GENERAC HLDGS COM 368736104 11,258 -1,539 -12.03 2,006 -25.54 0.0065
2022-10-27 2022-09-30 13F GENERAC HLDGS COM 368736104 11,258 -1,539 2,006 0.0064
2022-12-01 2022-06-30 13F/A-1 GENERAC HLDGS COM 368736104 12,797 -2,621 -17.00 2,694 -41.22 0.0084
2022-07-27 2022-06-30 13F GENERAC HLDGS COM 368736104 12,797 -2,621 2,694 0.0083
2022-12-01 2022-03-31 13F/A-1 GENERAC HLDGS COM 368736104 15,418 -1,509 -8.91 4,583 -23.08 0.0108
2022-04-26 2022-03-31 13F GENERAC HLDGS COM 368736104 15,418 -1,509 4,583 0.0107
2022-12-01 2021-12-31 13F/A-1 GENERAC HLDGS COM 368736104 16,927 -27,133 -61.58 5,958 -66.91 0.0127
2022-01-31 2021-12-31 13F GENERAC HLDGS COM 368736104 16,927 -27,133 5,958 0.0125
2022-12-01 2021-09-30 13F/A-1 GENERAC HLDGS COM 368736104 44,060 -3,050 -6.47 18,006 -7.93 0.0399
2021-10-20 2021-09-30 13F GENERAC HLDGS COM 368736104 44,060 -3,050 18,006 0.0394
2022-12-01 2021-06-30 13F/A-1 GENERAC HLDGS COM 368736104 47,110 27,688 142.56 19,556 207.39 0.0433
2021-07-28 2021-06-30 13F GENERAC HLDGS COM 368736104 47,110 27,688 19,556 0.0428
2022-12-01 2021-03-31 13F/A-1 GENERAC HLDGS COM 368736104 19,422 2,295 13.40 6,362 63.42 0.0157
2021-04-23 2021-03-31 13F GENERAC HLDGS COM 368736104 19,422 2,295 6,362 0.0155
2022-12-01 2020-12-31 13F/A-1 GENERAC HLDGS COM 368736104 17,127 15,540 979.21 3,893 1,168.08 0.0102
2021-01-28 2020-12-31 13F GENERAC HLDGS COM 368736104 17,127 15,540 3,893 0.0101
2021-01-19 2020-09-30 13F/A-1 GENERAC HLDGS COM 368736104 1,587 -1,697 -51.67 307 -23.25 0.0009
2020-10-29 2020-09-30 13F GENERAC HLDGS COM 368736104 1,587 -1,697 307 948.1159
2021-01-19 2020-06-30 13F/A-1 GENERAC HLDGS COM 368736104 3,284 -1,358 -29.25 400 -7.41 0.0014
2020-07-20 2020-06-30 13F GENERAC HLDGS COM 368736104 3,284 -1,358 400 1,357.2713
2021-01-19 2020-03-31 13F/A-1 GENERAC HLDGS COM 368736104 4,642 0 0.00 432 -7.49 0.0017
2020-04-30 2020-03-31 13F GENERAC HLDGS COM 368736104 4,642 0 432 1,731.5534
2021-01-19 2019-12-31 13F/A-1 GENERAC HLDGS COM 368736104 4,642 -4,642 -50.00 467 -35.85 0.0015
2020-02-06 2019-12-31 13F GENERAC HLDGS COM 368736104 4,642 -4,642 467 1,493.6636
2021-01-19 2019-09-30 13F/A-1 GENERAC HLDGS COM 368736104 9,284 0 0.00 728 13.04 0.0026
2019-10-17 2019-09-30 13F GENERAC HLDGS COM 368736104 9,284 0 728 2,566.4994
2021-01-19 2019-06-30 13F/A-1 GENERAC HLDGS COM 368736104 9,284 0 0.00 644 35.29 0.0023
2019-07-19 2019-06-30 13F GENERAC HLDGS COM 368736104 9,284 0 644 2,270.9125
2021-01-19 2019-03-31 13F/A-1 GENERAC HLDGS COM 368736104 9,284 9,284 476 0.0018
2019-05-02 2019-03-31 13F GENERAC HLDGS COM 368736104 9,284 476
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.