GFL Environmental Inc.
US ˙ NYSE ˙ CA36168Q1046

SecurityGFL / GFL Environmental Inc.
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership1,143,825 shares
Latest Disclosed Value $ 47,720,379
Citadel Advisors Llc ownership in GFL / GFL Environmental Inc.

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 1,143,825 shares of GFL Environmental Inc. (US:GFL) valued at $47,720,379 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,375,115 shares of GFL Environmental Inc.. This represents a change in shares of -16.82% during the quarter. The current value of the position is $40,617,226 USD.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (GFL) in the form of stock options. The firm currently holds call options representing 6,900 of underlying shares valued at $287,868 USD and put options representing 5,900 of underlying shares valued at $246,148 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.

GFL / GFL Environmental 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 GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 1,143,825 -231,290 -16.82 47,720 -19.20 0.0068
2026-02-17 2025-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 1,375,115 1,234,814 880.12 59,061 788.54 0.0089
2025-11-14 2025-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 140,301 107,997 334.31 6,647 307.79 0.0010
2025-08-14 2025-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 32,304 -542,653 -94.38 1,630 -94.13 0.0003
2025-05-15 2025-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 574,957 -1,294,570 -69.25 27,776 -66.64 0.0053
2025-02-14 2024-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 1,869,527 654,936 53.92 83,269 71.91 0.0144
2024-11-14 2024-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 1,214,591 559,545 85.42 48,438 89.95 0.0093
2024-08-14 2024-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 655,046 -1,103,532 -62.75 25,501 -57.97 0.0052
2024-05-15 2024-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 1,758,578 1,068,467 154.83 60,671 154.76 0.0117
2024-02-14 2023-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 690,111 -366,600 -34.69 23,816 -29.04 0.0048
2023-11-14 2023-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 1,056,711 -2,270,130 -68.24 33,561 -74.00 0.0072
2023-08-14 2023-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 3,326,841 3,258,595 4,774.78 129,081 5,392.81 0.0267
2023-05-15 2023-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 68,246 -3,724,498 -98.20 2,350 -97.88 0.0005
2023-02-14 2022-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 3,792,744 1,450,019 61.89 110,862 87.11 0.0259
2022-11-14 2022-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 2,342,725 546,185 30.40 59,248 27.82 0.0135
2022-08-15 2022-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 1,796,540 275,635 18.12 46,351 -6.34 0.0119
2022-05-16 2022-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 1,520,905 -584,770 -27.77 49,490 -37.90 0.0102
2022-02-14 2021-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 2,105,675 574,925 37.56 79,700 40.15 0.0163
2021-11-15 2021-09-30 13F GFL ENVIRONMENTAL Cmn 36168Q104 1,530,750 1,285,099 523.14 56,867 625.25 0.0118
2021-08-16 2021-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 245,651 -533,983 -68.49 7,841 -71.22 0.0018
2021-05-21 2021-03-31 13F/A-1 GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 779,634 657,387 537.75 27,249 663.92 0.0067
2021-05-17 2021-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 779,634 657,387 27,249 0.0067
2021-02-16 2020-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 122,247 -2,564,379 -95.45 3,567 -93.76 0.0009
2020-11-16 2020-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS 36168Q104 2,686,626 1,353,569 101.54 57,118 128.28 0.0162
2020-08-14 2020-06-30 13F GFL ENVIRONMENTAL Cmn 36168Q104 1,333,057 76,026 6.05 25,021 32.25 0.0089
2020-05-15 2020-03-31 13F GFL ENVIRONMENTAL Cmn 36168Q104 1,257,031 1,257,031 18,919 0.0085
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
(%)
2026-05-15 2026-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 6,900 21.05 288 17.62 n/a n/a n/a
2026-02-17 2025-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 5,700 -70.47 245 -73.30 n/a n/a n/a
2025-11-14 2025-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 19,300 40.88 914 32.27 n/a n/a n/a
2025-08-14 2025-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 13,700 -52.60 691 -50.50 n/a n/a n/a
2025-05-15 2025-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 28,900 265.82 1,396 297.72 n/a n/a n/a
2025-02-14 2024-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 7,900 -48.70 352 -42.83 n/a n/a n/a
2024-11-14 2024-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 15,400 -44.20 614 -42.83 n/a n/a n/a
2024-08-14 2024-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 27,600 -46.20 1,074 -39.29 n/a n/a n/a
2024-05-15 2024-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 51,300 45.74 1,770 45.72 n/a n/a n/a
2024-02-14 2023-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 35,200 -24.95 1,215 -18.47 n/a n/a n/a
2023-11-14 2023-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 46,900 193.12 1,490 140.16 n/a n/a n/a
2023-08-14 2023-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 16,000 -2.44 621 9.93 n/a n/a n/a
2023-05-15 2023-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 16,400 -66.60 565 -60.70 n/a n/a n/a
2023-02-14 2022-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 49,100 24.30 1,435 43.64 n/a n/a n/a
2022-11-14 2022-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 39,500 33.45 999 30.76 n/a n/a n/a
2022-08-15 2022-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 29,600 -12.43 764 -30.55 n/a n/a n/a
2022-05-16 2022-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 33,800 -19.33 1,100 -30.64 n/a n/a n/a
2022-02-14 2021-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 41,900 -28.86 1,586 -27.51 n/a n/a n/a
2021-11-15 2021-09-30 13F GFL ENVIRONMENTAL Cmn Call 58,900 53.79 2,188 78.90 n/a n/a n/a
2021-08-16 2021-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 38,300 -24.75 1,223 -31.25 n/a n/a n/a
2021-05-21 2021-03-31 13F/A GFL ENVIRONMENTAL SUB VTG SHS Call 50,900 99.61 1,779 139.11 n/a n/a n/a
2021-05-17 2021-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 50,900 1,779 n/a n/a n/a
2021-02-16 2020-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Call 25,500 -26.51 744 0.81 n/a n/a n/a
2020-11-16 2020-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS Call 34,700 738 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
(%)
2026-05-15 2026-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 5,900 246 n/a n/a n/a
2026-02-17 2025-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-11-14 2025-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS Put 12,400 -42.06 588 -45.60 n/a n/a n/a
2025-08-14 2025-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Put 21,400 -0.93 1,080 3.45 n/a n/a n/a
2025-05-15 2025-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 21,600 66.15 1,043 80.14 n/a n/a n/a
2025-02-14 2024-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 13,000 -52.21 579 -46.59 n/a n/a n/a
2024-11-14 2024-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS Put 27,200 -14.47 1,085 -12.37 n/a n/a n/a
2024-08-14 2024-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Put 31,800 -50.23 1,238 -43.87 n/a n/a n/a
2024-05-15 2024-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 63,900 20.11 2,205 20.11 n/a n/a n/a
2024-02-14 2023-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 53,200 416.50 1,836 461.16 n/a n/a n/a
2023-11-14 2023-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS Put 10,300 134.09 327 92.35 n/a n/a n/a
2023-08-14 2023-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Put 4,400 -42.11 171 -34.87 n/a n/a n/a
2023-05-15 2023-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 7,600 -90.39 262 -88.71 n/a n/a n/a
2023-02-14 2022-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 79,100 8.80 2,312 25.72 n/a n/a n/a
2022-11-14 2022-09-30 13F GFL ENVIRONMENTAL SUB VTG SHS Put 72,700 110.12 1,839 105.94 n/a n/a n/a
2022-08-15 2022-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Put 34,600 -7.98 893 -27.04 n/a n/a n/a
2022-05-16 2022-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 37,600 14.29 1,224 -1.69 n/a n/a n/a
2022-02-14 2021-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 32,900 -71.81 1,245 -71.28 n/a n/a n/a
2021-11-15 2021-09-30 13F GFL ENVIRONMENTAL Cmn Put 116,700 -12.98 4,335 1.29 n/a n/a n/a
2021-08-16 2021-06-30 13F GFL ENVIRONMENTAL SUB VTG SHS Put 134,100 6.77 4,280 -2.51 n/a n/a n/a
2021-05-21 2021-03-31 13F/A GFL ENVIRONMENTAL SUB VTG SHS Put 125,600 1,052.29 4,390 1,280.50 n/a n/a n/a
2021-05-17 2021-03-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 125,600 4,390 n/a n/a n/a
2021-02-16 2020-12-31 13F GFL ENVIRONMENTAL SUB VTG SHS Put 10,900 318 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.