WillScot Holdings Corporation
US ˙ NasdaqCM ˙ US9713781048

SecurityWSC / WillScot Holdings Corporation
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership905,417 shares
Latest Disclosed Value $ 15,718,039
Citadel Advisors Llc ownership in WSC / WillScot Holdings Corporation

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 905,417 shares of WillScot Holdings Corporation (US:WSC) valued at $15,718,039 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,034,169 shares of WillScot Holdings Corporation. This represents a change in shares of -12.45% during the quarter. The current value of the position is $23,730,980 USD.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (WSC) in the form of stock options. The firm currently holds call options representing 59,200 of underlying shares valued at $1,027,712 USD and put options representing 64,500 of underlying shares valued at $1,119,720 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.

Upgrade to unlock premium data and export to Excel .

Institutional Put/Call Ratios
(Premium Subscription Required)

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.

WSC / WillScot Holdings Corporation 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 WILLSCOT HLDGS COM CL A 971378104 905,417 -128,752 -12.45 15,718 -19.28 0.0022
2026-02-17 2025-12-31 13F WILLSCOT HLDGS COM CL A 971378104 1,034,169 472,876 84.25 19,473 64.36 0.0026
2025-11-14 2025-09-30 13F WILLSCOT HLDGS COM CL A 971378104 561,293 -2,568,788 -82.07 11,849 -86.19 0.0018
2025-08-14 2025-06-30 13F WILLSCOT HLDGS COM CL A 971378104 3,130,081 2,461,063 367.86 85,764 361.15 0.0149
2025-05-15 2025-03-31 13F WILLSCOT HLDGS COM CL A 971378104 669,018 -250,194 -27.22 18,599 -39.51 0.0035
2025-02-14 2024-12-31 13F WILLSCOT HLDGS COM CL A 971378104 919,212 733,648 395.36 30,748 340.69 0.0053
2024-11-14 2024-09-30 13F WILLSCOT HLDGS COM CL A 971378104 185,564 -318,092 -63.16 6,977 -63.20 0.0013
2024-08-14 2024-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 503,656 483,245 2,367.57 18,958 1,897.58 0.0038
2024-05-15 2024-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 20,411 -1,054,691 -98.10 949 -98.02 0.0002
2024-02-14 2023-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 1,075,102 -3,687,348 -77.43 47,842 -75.85 0.0096
2023-11-14 2023-09-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 4,762,450 3,537,111 288.66 198,070 238.25 0.0425
2023-08-14 2023-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 1,225,339 -701,549 -36.41 58,559 -35.17 0.0121
2023-05-15 2023-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 1,926,888 1,660,310 622.82 90,333 650.20 0.0199
2023-02-14 2022-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 266,578 -699,997 -72.42 12,041 -69.11 0.0028
2022-11-14 2022-09-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 966,575 -1,247,350 -56.34 38,982 -45.69 0.0089
2022-08-15 2022-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 2,213,925 570,769 34.74 71,776 11.63 0.0184
2022-05-16 2022-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 1,643,156 253,322 18.23 64,296 13.28 0.0133
2022-02-14 2021-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 1,389,834 -849,538 -37.94 56,760 -20.09 0.0116
2021-11-15 2021-09-30 13F WILLSCOT MOBIL MINI HLDNG Cmn 971378104 2,239,372 1,790,494 398.88 71,033 467.81 0.0148
2021-08-16 2021-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 448,878 -1,678,456 -78.90 12,510 -78.81 0.0028
2021-05-21 2021-03-31 13F/A-1 WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 2,127,334 1,920,556 928.80 59,034 1,132.19 0.0145
2021-05-17 2021-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 2,127,334 1,920,556 59,034 0.0145
2021-02-16 2020-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 206,778 -245,287 -54.26 4,791 -36.46 0.0012
2020-11-16 2020-09-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A 971378104 452,065 452,065 7,540 0.0021
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 WILLSCOT HLDGS COM CL A Call 59,200 -9.06 1,028 -16.16 n/a n/a n/a
2026-02-17 2025-12-31 13F WILLSCOT HLDGS COM CL A Call 65,100 -86.30 1,226 -87.79 n/a n/a n/a
2025-11-14 2025-09-30 13F WILLSCOT HLDGS COM CL A Call 475,300 66.48 10,034 28.27 n/a n/a n/a
2025-08-14 2025-06-30 13F WILLSCOT HLDGS COM CL A Call 285,500 19.26 7,823 17.54 n/a n/a n/a
2025-05-15 2025-03-31 13F WILLSCOT HLDGS COM CL A Call 239,400 -69.00 6,655 -74.24 n/a n/a n/a
2025-02-14 2024-12-31 13F WILLSCOT HLDGS COM CL A Call 772,300 381.48 25,833 328.34 n/a n/a n/a
2024-11-14 2024-09-30 13F WILLSCOT HLDGS COM CL A Call 160,400 -13.44 6,031 -13.52 n/a n/a n/a
2024-08-14 2024-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 185,300 10.83 6,975 -10.29 n/a n/a n/a
2024-05-15 2024-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 167,200 -1.36 7,775 3.08 n/a n/a n/a
2024-02-14 2023-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 169,500 121.28 7,543 136.80 n/a n/a n/a
2023-11-14 2023-09-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 76,600 -37.98 3,186 -46.04 n/a n/a n/a
2023-08-14 2023-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 123,500 12.17 5,902 14.36 n/a n/a n/a
2023-05-15 2023-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 110,100 14.45 5,161 18.78 n/a n/a n/a
2023-02-14 2022-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 96,200 -43.04 4,345 -36.22 n/a n/a n/a
2022-11-14 2022-09-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 168,900 18.03 6,812 46.84 n/a n/a n/a
2022-08-15 2022-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 143,100 235.13 4,639 177.62 n/a n/a n/a
2022-05-16 2022-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 42,700 27.84 1,671 22.51 n/a n/a n/a
2022-02-14 2021-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 33,400 -64.43 1,364 -54.21 n/a n/a n/a
2021-11-15 2021-09-30 13F WILLSCOT MOBIL MINI HLDNG Cmn Call 93,900 -46.25 2,979 -38.82 n/a n/a n/a
2021-08-16 2021-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 174,700 61.91 4,869 62.63 n/a n/a n/a
2021-05-21 2021-03-31 13F/A WILLSCOT MOBIL MINI HLDNG COM CL A Call 107,900 5.37 2,994 26.17 n/a n/a n/a
2021-05-17 2021-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 107,900 2,994 n/a n/a n/a
2021-02-16 2020-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 102,400 10.94 2,373 54.09 n/a n/a n/a
2020-11-16 2020-09-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Call 92,300 1,540 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 WILLSCOT HLDGS COM CL A Put 64,500 41.14 1,120 30.12 n/a n/a n/a
2026-02-17 2025-12-31 13F WILLSCOT HLDGS COM CL A Put 45,700 -1.72 861 -12.33 n/a n/a n/a
2025-11-14 2025-09-30 13F WILLSCOT HLDGS COM CL A Put 46,500 43.52 982 10.60 n/a n/a n/a
2025-08-14 2025-06-30 13F WILLSCOT HLDGS COM CL A Put 32,400 -73.81 888 -74.20 n/a n/a n/a
2025-05-15 2025-03-31 13F WILLSCOT HLDGS COM CL A Put 123,700 -67.23 3,439 -72.77 n/a n/a n/a
2025-02-14 2024-12-31 13F WILLSCOT HLDGS COM CL A Put 377,500 187.95 12,627 156.18 n/a n/a n/a
2024-11-14 2024-09-30 13F WILLSCOT HLDGS COM CL A Put 131,100 8.71 4,929 8.59 n/a n/a n/a
2024-08-14 2024-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 120,600 228.61 4,539 166.06 n/a n/a n/a
2024-05-15 2024-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 36,700 52.92 1,707 59.74 n/a n/a n/a
2024-02-14 2023-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 24,000 -68.67 1,068 -66.47 n/a n/a n/a
2023-11-14 2023-09-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 76,600 -18.86 3,186 -29.39 n/a n/a n/a
2023-08-14 2023-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 94,400 413.04 4,511 423.32 n/a n/a n/a
2023-05-15 2023-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 18,400 -57.01 863 -55.41 n/a n/a n/a
2023-02-14 2022-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 42,800 35.02 1,933 51.25 n/a n/a n/a
2022-11-14 2022-09-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 31,700 57.71 1,278 96.01 n/a n/a n/a
2022-08-15 2022-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 20,100 24.84 652 3.49 n/a n/a n/a
2022-05-16 2022-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 16,100 -80.20 630 -81.02 n/a n/a n/a
2022-02-14 2021-12-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 81,300 -67.23 3,320 -57.81 n/a n/a n/a
2021-11-15 2021-09-30 13F WILLSCOT MOBIL MINI HLDNG Cmn Put 248,100 243.63 7,870 291.15 n/a n/a n/a
2021-08-16 2021-06-30 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 72,200 84.18 2,012 84.93 n/a n/a n/a
2021-05-21 2021-03-31 13F/A WILLSCOT MOBIL MINI HLDNG COM CL A Put 39,200 1,088 n/a n/a n/a
2021-05-17 2021-03-31 13F WILLSCOT MOBIL MINI HLDNG COM CL A Put 39,200 1,088 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.