Generac Holdings Inc.
MX ˙ BMV ˙ US3687361044
SecurityMX:GNRC / Generac Holdings Inc.
InstitutionShay Capital LLC
Latest Disclosed Ownership1,900 shares
Latest Disclosed Value $ 371,127
Shay Capital LLC ownership in GNRC / Generac Holdings Inc.

On May 15, 2026 - Shay Capital LLC filed a 13F-HR form disclosing ownership of 1,900 shares of Generac Holdings Inc. (MX:GNRC) valued at $371,127 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 14, 2025 disclosing 0 shares of Generac Holdings Inc..

Shay Capital LLC has a history of taking positions in derivatives of the underlying security (GNRC) in the form of stock options. The firm currently holds call options representing 0 of underlying shares valued at $0 USD and put options representing 0 of underlying shares valued at $0 USD .

Note: prior versions of this page mistakenly stated that the share values represented the number of options, not the number of underlying shares. For more information on the data backing these reports, please see the SEC document Frequently Asked Questions About Form 13F.

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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Institutional Put/Call Ratios
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In addition to reporting standard equity and debt issues, institutions with more than 100MM assets under management must also disclose their put and call option holdings. Since put options generally indicate negative sentiment, and call options indicate positive sentiment, we can get a sense of the overall institutional sentiment by plotting the ratio of puts to calls. The chart to the right plots the historical put/call ratio for this instrument.

Using Put/Call Ratio as an indicator of investor sentiment overcomes one of the key deficiencies of using total institutional ownership, which is that a significant amount of assets under management are invested passively to track indices. Passively-managed funds do not typically buy options, so the put/call ratio indicator more closely tracks the sentiment of actively-managed funds.

MX:GNRC / Generac Holdings Inc. Historical Put/Call Ratio
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)
2026-05-15 2026-03-31 13F GENERAC HLDGS COM 368736104 1,900 1,900 371 0.0310
2025-11-14 2025-09-30 13F GENERAC HLDGS COM 368736104 0 -11,000 -100.00 0 -100.00
2025-08-14 2025-06-30 13F GENERAC HLDGS COM 368736104 11,000 11,000 1,575 0.1804
2025-02-14 2024-12-31 13F GENERAC HLDGS COM 368736104 0 -14,295 -100.00 0 -100.00
2024-11-14 2024-09-30 13F GENERAC HLDGS COM 368736104 14,295 1,795 14.36 2,271 37.47 0.3209
2024-08-14 2024-06-30 13F GENERAC HLDGS COM 368736104 12,500 12,500 1,653 0.2281
2024-02-14 2023-12-31 13F GENERAC HLDGS COM 368736104 0 -5,000 -100.00 0 -100.00
2023-11-14 2023-09-30 13F GENERAC HLDGS COM 368736104 5,000 5,000 545 0.0767
2023-02-14 2022-12-31 13F GENERAC HLDGS COM 368736104 0 -4,450 -100.00 0 -100.00
2022-11-14 2022-09-30 13F GENERAC HLDGS COM 368736104 4,450 4,450 793 0.1712
2022-05-16 2022-03-31 13F GENERAC HLDGS COM 368736104 0 -1,712 -100.00 0 -100.00
2022-02-14 2021-12-31 13F GENERAC HLDGS COM 368736104 1,712 1,712 602 0.0995
2021-11-15 2021-09-30 13F GENERAC HLDGS COM 368736104 0 -2,300 -100.00 0 -100.00
2021-08-13 2021-06-30 13F GENERAC HLDGS COM 368736104 2,300 1,300 130.00 955 192.05 0.1096
2021-08-13 2021-03-31 13F GENERAC HLDGS COM 368736104 1,000 -5,700 -85.07 327 -78.54 0.0332
2021-08-13 2020-12-31 13F GENERAC HLDGS COM 368736104 6,700 6,700 1,524 0.3325
Disclosed Call Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share
Price
Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2023-02-14 2022-12-31 13F GENERAC HLDGS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-11-14 2022-09-30 13F GENERAC HLDGS COM Call 200 36 n/a n/a n/a
2022-05-16 2022-03-31 13F GENERAC HLDGS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F GENERAC HLDGS COM Call 200 70 n/a n/a n/a
2021-08-13 2021-06-30 13F GENERAC HLDGS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-08-13 2021-03-31 13F GENERAC HLDGS COM Call 500 -95.65 164 -93.73 n/a n/a n/a
2021-08-13 2020-12-31 13F GENERAC HLDGS COM Call 11,500 2,615 n/a n/a n/a
Disclosed Put Options
File
Date
Effective
Date
Form Security Class ID Opt Avg Share Price Shares ΔShares
(%)
Value
(x1000)
ΔValue
(%)
Prior Allocation
(%)
Allocation
(%)
ΔAllocation
(%)
Cost Basis
(x1000)
Profit
(x1000)
Return
(%)
2022-05-16 2022-03-31 13F GENERAC HLDGS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-02-14 2021-12-31 13F GENERAC HLDGS COM Put 500 176 n/a n/a n/a
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.