Generac Holdings Inc.
US ˙ NYSE ˙ US3687361044

SecurityGNRC / Generac Holdings Inc.
InstitutionBoston Partners
Latest Disclosed Ownership1,535,979 shares
Latest Disclosed Value $ 300,017,901
Boston Partners reports 4.86% decrease in ownership of GNRC / Generac Holdings Inc.

On May 11, 2026 - Boston Partners filed a 13F-HR form disclosing ownership of 1,535,979 shares of Generac Holdings Inc. (US:GNRC) valued at $300,022,778 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,614,367 shares of Generac Holdings Inc.. This represents a change in shares of -4.86% during the quarter. The current value of the position is $438,230,168 USD.

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)
2026-05-11 2026-03-31 13F GENERAC HLDGS COM 368736104 1,535,979 -78,388 -4.86 300,018 36.22 0.1343
2026-02-13 2025-12-31 13F GENERAC HLDGS COM 368736104 1,614,367 -332,965 -17.10 220,241 -32.44 0.2280
2025-11-13 2025-09-30 13F GENERAC HLDGS COM 368736104 1,947,332 128,439 7.06 326,003 25.03 0.3347
2025-08-12 2025-06-30 13F/A-1 GENERAC HLDGS COM 368736104 1,818,893 -34,773 -1.88 260,733 11.10 0.2896
2025-08-07 2025-06-30 13F GENERAC HLDGS COM 368736104 1,818,893 -34,773 260,733 0.1197
2025-05-13 2025-03-31 13F GENERAC HLDGS COM 368736104 1,853,666 -49,631 -2.61 234,692 -20.48 0.2838
2025-02-11 2024-12-31 13F GENERAC HLDGS COM 368736104 1,903,297 533,612 38.96 295,123 35.60 0.3590
2024-11-12 2024-09-30 13F GENERAC HLDGS COM 368736104 1,369,685 439,361 47.23 217,640 76.87 0.2569
2024-08-14 2024-06-30 13F GENERAC HLDGS COM 368736104 930,324 930,324 123,051 0.1529
2020-05-13 2020-03-31 13F GENERAC HLDGS COM 368736104 0 -6,828 -100.00 0 -100.00
2020-02-06 2019-12-31 13F/A-1 GENERAC HLDGS COM 368736104 6,828 -23,379 -77.40 687 -70.96 0.0009
2020-02-05 2019-12-31 13F GENERAC HLDGS COM 368736104 6,828 -23,379 687 386.2515
2019-11-20 2019-09-30 13F/A-1 GENERAC HLDGS COM 368736104 30,207 -311,666 -91.16 2,366 -90.03 0.0032
2019-11-08 2019-09-30 13F GENERAC HLDGS COM 368736104 341,873 0 23,729 0.0314
2019-08-26 2019-06-30 13F/A-1 GENERAC HLDGS COM 368736104 341,873 -44,740 -11.57 23,729 19.81 0.0311
2019-08-09 2019-06-30 13F GENERAC HLDGS COM 368736104 341,873 -44,740 23,729
2019-05-13 2019-03-31 13F/A-1 GENERAC HLDGS COM 368736104 386,613 154,123 66.29 19,806 71.41 0.0262
2019-05-03 2019-03-31 13F GENERAC HLDGS COM 368736104 386,613 154,123 19,806
2019-02-07 2018-12-31 13F GENERAC HLDGS COM 368736104 232,490 81,831 54.32 11,555 35.96 0.0166
2018-11-14 2018-09-30 13F GENERAC HLDGS COM 368736104 150,659 -25,188 -14.32 8,499 -6.57 0.0099
2018-08-03 2018-06-30 13F GENERAC HLDGS COM 368736104 175,847 25,047 16.61 9,097 31.40 0.0109
2018-05-04 2018-03-31 13F GENERAC HLDGS COM 368736104 150,800 -20,257 -11.84 6,923 -18.27 0.0083
2018-02-14 2017-12-31 13F/A-1 GENERAC HLDGS COM 368736104 171,057 -40,724 -19.23 8,471 -12.91 0.0100
2018-02-01 2017-12-31 13F GENERAC HLDGS COM 368736104 171,057 -40,724 8,471
2017-11-02 2017-09-30 13F GENERAC HLDGS COM 368736104 211,781 -11,530 -5.16 9,727 20.55 0.0120
2017-08-02 2017-06-30 13F GENERAC HLDGS COM 368736104 223,311 -7,750 -3.35 8,069 -6.33 0.0103
2017-05-03 2017-03-31 13F GENERAC HLDGS COM 368736104 231,061 22,760 10.93 8,614 1.51 0.0110
2017-02-06 2016-12-31 13F GENERAC HLDGS COM 368736104 208,301 -48,310 -18.83 8,486 -8.90 0.0112
2016-11-09 2016-09-30 13F GENERAC HLDGS COM 368736104 256,611 -6,730 -2.56 9,315 1.18 0.0130
2016-08-05 2016-06-30 13F GENERAC HLDGS COM 368736104 263,341 31,948 13.81 9,206 6.84 0.0133
2016-05-12 2016-03-31 13F GENERAC HLDGS COM 368736104 231,393 -39,611 -14.62 8,617 6.80 0.0127
2016-02-08 2015-12-31 13F GENERAC HLDGS COM 368736104 271,004 -62,389 -18.71 8,068 -19.58 0.0116
2015-11-10 2015-09-30 13F GENERAC HLDGS COM 368736104 333,393 -37,211 -10.04 10,032 -31.90 0.0153
2015-08-10 2015-06-30 13F GENERAC HLDGS COM 368736104 370,604 168,023 82.94 14,732 49.37 0.0212
2015-05-05 2015-03-31 13F GENERAC HLDGS COM 368736104 202,581 -31,530 -13.47 9,863 -9.90 0.0147
2015-02-09 2014-12-31 13F GENERAC HLDGS COM 368736104 234,111 41,641 21.64 10,947 40.29 0.0164
2014-11-12 2014-09-30 13F GENERAC HLDGS COM 368736104 192,470 192,470 7,803 0.0127
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.