Box, Inc.
US ˙ NYSE ˙ US10316T1043

SecurityBOX / Box, Inc.
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership2,337,851 shares
Latest Disclosed Value $ 55,266,797
Citadel Advisors Llc ownership in BOX / Box, Inc.

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 2,337,851 shares of Box, Inc. (US:BOX) valued at $55,266,798 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 259,686 shares of Box, Inc.. This represents a change in shares of 800.26% during the quarter. The current value of the position is $62,373,865 USD.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (BOX) in the form of stock options. The firm currently holds call options representing 148,100 of underlying shares valued at $3,501,084 USD and put options representing 28,800 of underlying shares valued at $680,832 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
(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.

BOX / Box, 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 BOX CL A 10316T104 2,337,851 2,078,165 800.26 55,267 611.55 0.0079
2026-02-17 2025-12-31 13F BOX CL A 10316T104 259,686 -112,461 -30.22 7,767 -35.32 0.0012
2025-11-14 2025-09-30 13F BOX CL A 10316T104 372,147 -141,435 -27.54 12,009 -31.57 0.0018
2025-08-14 2025-06-30 13F BOX CL A 10316T104 513,582 -910,186 -63.93 17,549 -60.06 0.0030
2025-05-15 2025-03-31 13F BOX CL A 10316T104 1,423,768 917,446 181.20 43,937 174.62 0.0083
2025-02-14 2024-12-31 13F BOX CL A 10316T104 506,322 251,751 98.89 16,000 92.02 0.0028
2024-11-14 2024-09-30 13F BOX CL A 10316T104 254,571 68,916 37.12 8,332 69.76 0.0016
2024-08-14 2024-06-30 13F BOX CL A 10316T104 185,655 -259,516 -58.30 4,909 -61.07 0.0010
2024-05-15 2024-03-31 13F BOX CL A 10316T104 445,171 -1,397,641 -75.84 12,607 -73.29 0.0024
2024-02-14 2023-12-31 13F BOX CL A 10316T104 1,842,812 1,486,881 417.74 47,194 447.68 0.0094
2023-11-14 2023-09-30 13F BOX CL A 10316T104 355,931 129,135 56.94 8,617 29.33 0.0018
2023-08-14 2023-06-30 13F BOX CL A 10316T104 226,796 -303,001 -57.19 6,663 -53.05 0.0014
2023-05-15 2023-03-31 13F BOX CL A 10316T104 529,797 401,713 313.63 14,193 255.98 0.0031
2023-02-14 2022-12-31 13F BOX CL A 10316T104 128,084 128,084 3,987 0.0009
2022-11-14 2022-09-30 13F BOX CL A 10316T104 0 -260,244 -100.00 0 -100.00
2022-08-15 2022-06-30 13F BOX CL A 10316T104 260,244 173,429 199.77 6,543 159.33 0.0017
2022-05-16 2022-03-31 13F BOX CL A 10316T104 86,815 -72,133 -45.38 2,523 -39.39 0.0005
2022-02-14 2021-12-31 13F BOX CL A 10316T104 158,948 -906,622 -85.08 4,163 -83.49 0.0009
2021-11-15 2021-09-30 13F BOX Cmn 10316T104 1,065,570 642,690 151.98 25,222 133.43 0.0052
2021-08-16 2021-06-30 13F BOX CL A 10316T104 422,880 -1,367,647 -76.38 10,805 -73.72 0.0024
2021-05-21 2021-03-31 13F/A-1 BOX CL A 10316T104 1,790,527 1,271,882 245.23 41,111 339.13 0.0101
2021-05-17 2021-03-31 13F BOX CL A 10316T104 1,790,527 1,271,882 41,111 0.0101
2021-02-16 2020-12-31 13F BOX CL A 10316T104 518,645 -555,785 -51.73 9,362 -49.81 0.0024
2020-11-16 2020-09-30 13F BOX CL A 10316T104 1,074,430 -1,593,957 -59.73 18,652 -66.33 0.0053
2020-08-14 2020-06-30 13F BOX Cmn 10316T104 2,668,387 1,611,760 152.54 55,396 273.41 0.0198
2020-05-15 2020-03-31 13F BOX Cmn 10316T104 1,056,627 780,159 282.19 14,835 219.79 0.0067
2020-02-14 2019-12-31 13F BOX Cmn 10316T104 276,468 47,463 20.73 4,639 22.34 0.0020
2019-11-14 2019-09-30 13F BOX Cmn 10316T104 229,005 56,086 32.43 3,792 24.53 0.0018
2019-08-14 2019-06-30 13F BOX Cmn 10316T104 172,919 -1,004,826 -85.32 3,045 -86.61 0.0014
2019-05-15 2019-03-31 13F BOX Cmn 10316T104 1,177,745 253,107 27.37 22,742 45.72 0.0113
2019-02-14 2018-12-31 13F BOX Cmn 10316T104 924,638 601,996 186.58 15,607 102.32 0.0086
2018-11-13 2018-09-30 13F BOX Cmn 10316T104 322,642 26,856 9.08 7,714 4.37 0.0035
2018-08-14 2018-06-30 13F/A-1 BOX Cmn 10316T104 295,786 -1,012,211 -77.39 7,391 -72.50 0.0037
2018-08-10 2018-06-30 13F BOX Cmn 10316T104 295,786 -1,012,211 7,391
2018-05-14 2018-03-31 13F/A-1 BOX Cmn 10316T104 1,307,997 1,237,448 1,754.03 26,879 1,703.96 0.0148
2018-05-11 2018-03-31 13F BOX Cmn 10316T104 1,307,997 1,237,448 26,879
2018-02-09 2017-12-31 13F BOX Cmn 10316T104 70,549 -520,817 -88.07 1,490 -86.96 0.0009
2017-11-09 2017-09-30 13F BOX Cmn 10316T104 591,366 171,528 40.86 11,425 49.19 0.0088
2017-08-11 2017-06-30 13F BOX Cmn 10316T104 419,838 -495,095 -54.11 7,658 -48.68 0.0065
2017-05-12 2017-03-31 13F BOX Cmn 10316T104 914,933 788,583 624.13 14,923 751.77 0.0136
2017-02-10 2016-12-31 13F BOX Cmn 10316T104 126,350 -204,400 -61.80 1,752 -66.39 0.0018
2017-01-31 2016-09-30 13F/A-1 BOX Cmn 10316T104 330,750 261,497 377.60 5,212 627.93 0.0052
2016-11-10 2016-09-30 13F BOX INC - Cmn 10316T104 330,750 261,497 5,212
2017-01-31 2016-06-30 13F/A-1 BOX Cmn 10316T104 69,253 37,944 121.19 716 86.46 0.0008
2016-08-12 2016-06-30 13F BOX INC - Cmn 10316T104 69,253 716
2017-01-31 2016-03-31 13F/A-1 BOX Cmn 10316T104 31,309 -15,631 -33.30 384 -41.37 0.0005
2016-05-13 2016-03-31 13F BOX INC - Cmn 10316T104 31,309 384
2017-01-31 2015-12-31 13F/A-1 BOX Cmn 10316T104 46,940 -268,494 -85.12 655 -83.49 0.0007
2016-02-12 2015-12-31 13F BOX INC - Cmn 10316T104 46,940 655
2015-11-16 2015-09-30 13F BOX INC - Cmn 10316T104 315,434 -158,746 -33.48 3,968 -55.10 0.0038
2015-08-14 2015-06-30 13F BOX INC - Cmn 10316T104 474,180 468,299 7,962.91 8,838 7,518.97 0.0077
2015-05-15 2015-03-31 13F BOX INC - Cmn 10316T104 5,881 5,881 116 0.0001
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 BOX CL A Call 148,100 -51.28 3,501 -61.49 n/a n/a n/a
2026-02-17 2025-12-31 13F BOX CL A Call 304,000 -34.58 9,093 -39.37 n/a n/a n/a
2025-11-14 2025-09-30 13F BOX CL A Call 464,700 -12.90 14,996 -17.74 n/a n/a n/a
2025-08-14 2025-06-30 13F BOX CL A Call 533,500 -2.45 18,230 8.01 n/a n/a n/a
2025-05-15 2025-03-31 13F BOX CL A Call 546,900 22.98 16,877 20.10 n/a n/a n/a
2025-02-14 2024-12-31 13F BOX CL A Call 444,700 80.70 14,053 74.47 n/a n/a n/a
2024-11-14 2024-09-30 13F BOX CL A Call 246,100 33.32 8,055 65.04 n/a n/a n/a
2024-08-14 2024-06-30 13F BOX CL A Call 184,600 40.70 4,881 31.36 n/a n/a n/a
2024-05-15 2024-03-31 13F BOX CL A Call 131,200 -35.81 3,716 -29.02 n/a n/a n/a
2024-02-14 2023-12-31 13F BOX CL A Call 204,400 -46.78 5,235 -43.71 n/a n/a n/a
2023-11-14 2023-09-30 13F BOX CL A Call 384,100 265.11 9,299 200.94 n/a n/a n/a
2023-08-14 2023-06-30 13F BOX CL A Call 105,200 -6.24 3,091 2.83 n/a n/a n/a
2023-05-15 2023-03-31 13F BOX CL A Call 112,200 -56.56 3,006 -62.62 n/a n/a n/a
2023-02-14 2022-12-31 13F BOX CL A Call 258,300 -29.10 8,041 -9.51 n/a n/a n/a
2022-11-14 2022-09-30 13F BOX CL A Call 364,300 20.87 8,885 17.26 n/a n/a n/a
2022-08-15 2022-06-30 13F BOX CL A Call 301,400 -34.28 7,577 -43.15 n/a n/a n/a
2022-05-16 2022-03-31 13F BOX CL A Call 458,600 -7.73 13,327 2.39 n/a n/a n/a
2022-02-14 2021-12-31 13F BOX CL A Call 497,000 -31.04 13,016 -23.70 n/a n/a n/a
2021-11-15 2021-09-30 13F BOX Cmn Call 720,700 52.17 17,059 40.98 n/a n/a n/a
2021-08-16 2021-06-30 13F BOX CL A Call 473,600 -44.32 12,100 -38.03 n/a n/a n/a
2021-05-21 2021-03-31 13F/A BOX CL A Call 850,500 184.26 19,527 261.54 n/a n/a n/a
2021-05-17 2021-03-31 13F BOX CL A Call 850,500 19,527 n/a n/a n/a
2021-02-16 2020-12-31 13F BOX CL A Call 299,200 27.75 5,401 32.83 n/a n/a n/a
2020-11-16 2020-09-30 13F BOX CL A Call 234,200 -37.91 4,066 -48.08 n/a n/a n/a
2020-08-14 2020-06-30 13F BOX Cmn Call 377,200 20.09 7,831 77.57 n/a n/a n/a
2020-05-15 2020-03-31 13F BOX Cmn Call 314,100 31.26 4,410 9.84 n/a n/a n/a
2020-02-14 2019-12-31 13F BOX Cmn Call 239,300 27.83 4,015 29.52 n/a n/a n/a
2019-11-14 2019-09-30 13F BOX Cmn Call 187,200 -35.98 3,100 -39.79 n/a n/a n/a
2019-08-14 2019-06-30 13F BOX Cmn Call 292,400 -8.57 5,149 -16.62 n/a n/a n/a
2019-05-15 2019-03-31 13F BOX Cmn Call 319,800 -20.66 6,175 -9.24 n/a n/a n/a
2019-02-14 2018-12-31 13F BOX Cmn Call 403,100 30.37 6,804 -7.97 n/a n/a n/a
2018-11-13 2018-09-30 13F BOX Cmn Call 309,200 -20.31 7,393 -23.75 n/a n/a n/a
2018-08-14 2018-06-30 13F/A BOX Cmn Call 388,000 227.98 9,696 298.85 n/a n/a n/a
2018-08-10 2018-06-30 13F BOX Cmn Call 388,000 9,696 n/a n/a n/a
2018-05-14 2018-03-31 13F/A BOX Cmn Call 118,300 78.16 2,431 73.40 n/a n/a n/a
2018-05-11 2018-03-31 13F BOX Cmn Call 118,300 2,431 n/a n/a n/a
2018-02-09 2017-12-31 13F BOX Cmn Call 66,400 -43.92 1,402 -38.70 n/a n/a n/a
2017-11-09 2017-09-30 13F BOX Cmn Call 118,400 64.22 2,287 73.92 n/a n/a n/a
2017-08-11 2017-06-30 13F BOX Cmn Call 72,100 18.59 1,315 32.56 n/a n/a n/a
2017-05-12 2017-03-31 13F BOX Cmn Call 60,800 36.63 992 60.78 n/a n/a n/a
2017-02-10 2016-12-31 13F BOX Cmn Call 44,500 -62.13 617 -66.68 n/a n/a n/a
2017-01-31 2016-09-30 13F/A BOX Cmn Call 117,500 85.33 1,852 182.32 n/a n/a n/a
2016-11-10 2016-09-30 13F BOX INC - Cmn Call 117,500 1,852 n/a n/a n/a
2017-01-31 2016-06-30 13F/A BOX Cmn Call 63,400 -53.82 656 -61.02 n/a n/a n/a
2016-08-12 2016-06-30 13F BOX INC - Cmn Call 63,400 656 n/a n/a n/a
2017-01-31 2016-03-31 13F/A BOX Cmn Call 137,300 311.08 1,683 261.16 n/a n/a n/a
2016-05-13 2016-03-31 13F BOX INC - Cmn Call 137,300 1,683 n/a n/a n/a
2017-01-31 2015-12-31 13F/A BOX Cmn Call 33,400 -27.86 466 -19.93 n/a n/a n/a
2016-02-12 2015-12-31 13F BOX INC - Cmn Call 33,400 466 n/a n/a n/a
2015-11-16 2015-09-30 13F BOX INC - Cmn Call 46,300 -33.67 582 -55.27 n/a n/a n/a
2015-08-14 2015-06-30 13F BOX INC - Cmn Call 69,800 -7.79 1,301 -12.98 n/a n/a n/a
2015-05-15 2015-03-31 13F BOX INC - Cmn Call 75,700 1,495 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 BOX CL A Put 28,800 -32.39 681 -46.62 n/a n/a n/a
2026-02-17 2025-12-31 13F BOX CL A Put 42,600 -34.46 1,274 -39.25 n/a n/a n/a
2025-11-14 2025-09-30 13F BOX CL A Put 65,000 137.23 2,098 124.04 n/a n/a n/a
2025-08-14 2025-06-30 13F BOX CL A Put 27,400 -27.89 936 -20.14 n/a n/a n/a
2025-05-15 2025-03-31 13F BOX CL A Put 38,000 -72.14 1,173 -72.81 n/a n/a n/a
2025-02-14 2024-12-31 13F BOX CL A Put 136,400 27.00 4,310 22.62 n/a n/a n/a
2024-11-14 2024-09-30 13F BOX CL A Put 107,400 43.01 3,515 77.08 n/a n/a n/a
2024-08-14 2024-06-30 13F BOX CL A Put 75,100 -15.81 1,986 -21.42 n/a n/a n/a
2024-05-15 2024-03-31 13F BOX CL A Put 89,200 -17.02 2,526 -8.25 n/a n/a n/a
2024-02-14 2023-12-31 13F BOX CL A Put 107,500 -28.24 2,753 -24.08 n/a n/a n/a
2023-11-14 2023-09-30 13F BOX CL A Put 149,800 143.18 3,627 100.44 n/a n/a n/a
2023-08-14 2023-06-30 13F BOX CL A Put 61,600 -69.69 1,810 -66.76 n/a n/a n/a
2023-05-15 2023-03-31 13F BOX CL A Put 203,200 85.23 5,444 59.43 n/a n/a n/a
2023-02-14 2022-12-31 13F BOX CL A Put 109,700 -25.83 3,415 -5.35 n/a n/a n/a
2022-11-14 2022-09-30 13F BOX CL A Put 147,900 24.81 3,607 21.08 n/a n/a n/a
2022-08-15 2022-06-30 13F BOX CL A Put 118,500 -20.42 2,979 -31.15 n/a n/a n/a
2022-05-16 2022-03-31 13F BOX CL A Put 148,900 3.47 4,327 14.80 n/a n/a n/a
2022-02-14 2021-12-31 13F BOX CL A Put 143,900 -57.11 3,769 -52.54 n/a n/a n/a
2021-11-15 2021-09-30 13F BOX Cmn Put 335,500 -63.97 7,941 -66.62 n/a n/a n/a
2021-08-16 2021-06-30 13F BOX CL A Put 931,200 27.32 23,792 41.68 n/a n/a n/a
2021-05-21 2021-03-31 13F/A BOX CL A Put 731,400 474.10 16,793 630.13 n/a n/a n/a
2021-05-17 2021-03-31 13F BOX CL A Put 731,400 16,793 n/a n/a n/a
2021-02-16 2020-12-31 13F BOX CL A Put 127,400 -43.18 2,300 -40.90 n/a n/a n/a
2020-11-16 2020-09-30 13F BOX CL A Put 224,200 -15.94 3,892 -29.71 n/a n/a n/a
2020-08-14 2020-06-30 13F BOX Cmn Put 266,700 78.51 5,537 163.92 n/a n/a n/a
2020-05-15 2020-03-31 13F BOX Cmn Put 149,400 55.62 2,098 30.23 n/a n/a n/a
2020-02-14 2019-12-31 13F BOX Cmn Put 96,000 -10.03 1,611 -8.83 n/a n/a n/a
2019-11-14 2019-09-30 13F BOX Cmn Put 106,700 -57.78 1,767 -60.29 n/a n/a n/a
2019-08-14 2019-06-30 13F BOX Cmn Put 252,700 47.26 4,450 34.28 n/a n/a n/a
2019-05-15 2019-03-31 13F BOX Cmn Put 171,600 9.93 3,314 25.77 n/a n/a n/a
2019-02-14 2018-12-31 13F BOX Cmn Put 156,100 -57.27 2,635 -69.83 n/a n/a n/a
2018-11-13 2018-09-30 13F BOX Cmn Put 365,300 -34.57 8,734 -37.40 n/a n/a n/a
2018-08-14 2018-06-30 13F/A BOX Cmn Put 558,300 205.08 13,952 270.97 n/a n/a n/a
2018-08-10 2018-06-30 13F BOX Cmn Put 558,300 13,952 n/a n/a n/a
2018-05-14 2018-03-31 13F/A BOX Cmn Put 183,000 39.38 3,761 35.63 n/a n/a n/a
2018-05-11 2018-03-31 13F BOX Cmn Put 183,000 3,761 n/a n/a n/a
2018-02-09 2017-12-31 13F BOX Cmn Put 131,300 67.05 2,773 82.55 n/a n/a n/a
2017-11-09 2017-09-30 13F BOX Cmn Put 78,600 14.08 1,519 20.84 n/a n/a n/a
2017-08-11 2017-06-30 13F BOX Cmn Put 68,900 85.71 1,257 107.77 n/a n/a n/a
2017-05-12 2017-03-31 13F BOX Cmn Put 37,100 -46.54 605 -37.11 n/a n/a n/a
2017-02-10 2016-12-31 13F BOX Cmn Put 69,400 84.57 962 62.23 n/a n/a n/a
2017-01-31 2016-09-30 13F/A BOX Cmn Put 37,600 -57.99 593 -35.89 n/a n/a n/a
2016-11-10 2016-09-30 13F BOX INC - Cmn Put 37,600 593 n/a n/a n/a
2017-01-31 2016-06-30 13F/A BOX Cmn Put 89,500 172.04 925 129.53 n/a n/a n/a
2016-08-12 2016-06-30 13F BOX INC - Cmn Put 89,500 925 n/a n/a n/a
2017-01-31 2016-03-31 13F/A BOX Cmn Put 32,900 27.03 403 11.33 n/a n/a n/a
2016-05-13 2016-03-31 13F BOX INC - Cmn Put 32,900 403 n/a n/a n/a
2017-01-31 2015-12-31 13F/A BOX Cmn Put 25,900 -32.73 362 -25.21 n/a n/a n/a
2016-02-12 2015-12-31 13F BOX INC - Cmn Put 25,900 362 n/a n/a n/a
2015-11-16 2015-09-30 13F BOX INC - Cmn Put 38,500 -64.94 484 -76.36 n/a n/a n/a
2015-08-14 2015-06-30 13F BOX INC - Cmn Put 109,800 89.97 2,047 79.25 n/a n/a n/a
2015-05-15 2015-03-31 13F BOX INC - Cmn Put 57,800 1,142 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.