Generac Holdings Inc.
MX ˙ BMV ˙ US3687361044
SecurityMX:GNRC / Generac Holdings Inc.
InstitutionIMC-Chicago, LLC
Latest Disclosed Ownership47,903 shares
Latest Disclosed Value $ 9,356,893
IMC-Chicago, LLC ownership in GNRC / Generac Holdings Inc.

On May 5, 2026 - IMC-Chicago, LLC filed a 13F-HR form disclosing ownership of 47,903 shares of Generac Holdings Inc. (MX:GNRC) valued at $9,356,893 USD as of March 31, 2026. The entity filed a previous 13F-HR on November 4, 2025 disclosing 0 shares of Generac Holdings Inc..

IMC-Chicago, 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 243,100 of underlying shares valued at $47,484,723 USD and put options representing 153,200 of underlying shares valued at $29,924,556 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)
2026-05-05 2026-03-31 13F GENERAC HLDGS COM 368736104 47,903 47,903 9,357 0.0033
2025-11-04 2025-09-30 13F GENERAC HLDGS COM 368736104 0 -33,257 -100.00 0 -100.00
2025-07-22 2025-06-30 13F GENERAC HLDGS COM 368736104 33,257 33,257 4,763 0.0021
2024-10-25 2024-09-30 13F GENERAC HLDGS COM 368736104 0 -16,310 -100.00 0 -100.00
2024-07-15 2024-06-30 13F GENERAC HLDGS COM 368736104 16,310 16,310 2,157 0.0013
2023-04-24 2023-03-31 13F GENERAC HLDGS COM 368736104 0 -12,208 -100.00 0 -100.00
2023-04-24 2022-12-31 13F/A-1 GENERAC HLDGS COM 368736104 12,208 12,208 1,229 0.0019
2023-02-09 2022-12-31 13F GENERAC HLDGS COM 368736104 12,208 12,208 1 0.0000
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
(%)
2026-05-05 2026-03-31 13F GENERAC HLDGS COM Call 243,100 -19.66 47,485 15.07 n/a n/a n/a
2026-01-29 2025-12-31 13F GENERAC HLDGS COM Call 302,600 2.06 41,266 -16.86 n/a n/a n/a
2025-11-04 2025-09-30 13F GENERAC HLDGS COM Call 296,500 63.54 49,634 91.17 n/a n/a n/a
2025-07-22 2025-06-30 13F GENERAC HLDGS COM Call 181,300 31.57 25,964 48.77 n/a n/a n/a
2025-04-14 2025-03-31 13F GENERAC HLDGS COM Call 137,800 -39.03 17,452 -50.20 n/a n/a n/a
2025-01-27 2024-12-31 13F GENERAC HLDGS COM Call 226,000 12.33 35,041 9.62 n/a n/a n/a
2024-10-25 2024-09-30 13F GENERAC HLDGS COM Call 201,200 12.84 31,967 35.60 n/a n/a n/a
2024-07-15 2024-06-30 13F GENERAC HLDGS COM Call 178,300 -6.26 23,575 -1.74 n/a n/a n/a
2024-04-12 2024-03-31 13F GENERAC HLDGS COM Call 190,200 8.38 23,992 5.78 n/a n/a n/a
2024-02-09 2023-12-31 13F GENERAC HLDGS COM Call 175,500 -22.72 22,682 -8.34 n/a n/a n/a
2023-10-12 2023-09-30 13F GENERAC HLDGS COM Call 227,100 27.51 24,745 -6.84 n/a n/a n/a
2023-07-14 2023-06-30 13F GENERAC HLDGS COM Call 178,100 35.23 26,560 86.73 n/a n/a n/a
2023-04-24 2023-03-31 13F GENERAC HLDGS COM Call 131,700 0.92 14,225 8.28 n/a n/a n/a
2023-04-24 2022-12-31 13F/A GENERAC HLDGS COM Call 130,500 13,136 n/a n/a n/a
2023-02-09 2022-12-31 13F GENERAC HLDGS COM Call 130,500 13 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
(%)
2026-05-05 2026-03-31 13F GENERAC HLDGS COM Put 153,200 34.62 29,925 92.83 n/a n/a n/a
2026-01-29 2025-12-31 13F GENERAC HLDGS COM Put 113,800 -14.24 15,519 -30.14 n/a n/a n/a
2025-11-04 2025-09-30 13F GENERAC HLDGS COM Put 132,700 -27.88 22,214 -15.70 n/a n/a n/a
2025-07-22 2025-06-30 13F GENERAC HLDGS COM Put 184,000 75.41 26,351 98.34 n/a n/a n/a
2025-04-14 2025-03-31 13F GENERAC HLDGS COM Put 104,900 -36.15 13,286 -47.85 n/a n/a n/a
2025-01-27 2024-12-31 13F GENERAC HLDGS COM Put 164,300 12.53 25,475 9.82 n/a n/a n/a
2024-10-25 2024-09-30 13F GENERAC HLDGS COM Put 146,000 2.17 23,196 22.77 n/a n/a n/a
2024-07-15 2024-06-30 13F GENERAC HLDGS COM Put 142,900 16.46 18,894 22.08 n/a n/a n/a
2024-04-12 2024-03-31 13F GENERAC HLDGS COM Put 122,700 -27.40 15,477 -29.14 n/a n/a n/a
2024-02-09 2023-12-31 13F GENERAC HLDGS COM Put 169,000 -8.00 21,842 9.12 n/a n/a n/a
2023-10-12 2023-09-30 13F GENERAC HLDGS COM Put 183,700 -28.80 20,016 -47.98 n/a n/a n/a
2023-07-14 2023-06-30 13F GENERAC HLDGS COM Put 258,000 100.00 38,476 176.14 n/a n/a n/a
2023-04-24 2023-03-31 13F GENERAC HLDGS COM Put 129,000 58.67 13,933 70.27 n/a n/a n/a
2023-04-24 2022-12-31 13F/A GENERAC HLDGS COM Put 81,300 8,184 n/a n/a n/a
2023-02-09 2022-12-31 13F GENERAC HLDGS COM Put 81,300 8 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.