Maximus, Inc.
MX ˙ BMV ˙ US5779331041
SecurityMX:MMS / Maximus, Inc.
InstitutionCitadel Advisors Llc
ManagerKen Griffin
Latest Disclosed Ownership100,102 shares
Latest Disclosed Value $ 6,416,539
Citadel Advisors Llc ownership in MMS / Maximus, Inc.

On May 15, 2026 - Citadel Advisors Llc filed a 13F-HR form disclosing ownership of 100,102 shares of Maximus, Inc. (MX:MMS) valued at $6,416,539 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 38,198 shares of Maximus, Inc.. This represents a change in shares of 162.06% during the quarter.

Citadel Advisors Llc has a history of taking positions in derivatives of the underlying security (MMS) 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 9,000 of underlying shares valued at $576,900 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:MMS / Maximus, 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 MAXIMUS COM 577933104 100,102 61,904 162.06 6,417 94.60 0.0009
2026-02-17 2025-12-31 13F MAXIMUS COM 577933104 38,198 -212,445 -84.76 3,297 -85.60 0.0005
2025-11-14 2025-09-30 13F MAXIMUS COM 577933104 250,643 -31,263 -11.09 22,901 15.73 0.0035
2025-08-14 2025-06-30 13F MAXIMUS COM 577933104 281,906 143,105 103.10 19,790 109.10 0.0034
2025-05-15 2025-03-31 13F MAXIMUS COM 577933104 138,801 -187,930 -57.52 9,465 -61.20 0.0018
2025-02-14 2024-12-31 13F MAXIMUS COM 577933104 326,731 71,862 28.20 24,390 2.73 0.0042
2024-11-14 2024-09-30 13F MAXIMUS COM 577933104 254,869 64,837 34.12 23,744 45.80 0.0046
2024-08-14 2024-06-30 13F MAXIMUS COM 577933104 190,032 60,248 46.42 16,286 49.57 0.0033
2024-05-15 2024-03-31 13F MAXIMUS COM 577933104 129,784 112,621 656.18 10,889 656.64 0.0021
2024-02-14 2023-12-31 13F MAXIMUS COM 577933104 17,163 -59,918 -77.73 1,439 -75.00 0.0003
2023-11-14 2023-09-30 13F MAXIMUS COM 577933104 77,081 76,229 8,947.07 5,756 7,894.44 0.0012
2023-08-14 2023-06-30 13F MAXIMUS COM 577933104 852 -84,897 -99.01 72 -98.93 0.0000
2023-05-15 2023-03-31 13F MAXIMUS COM 577933104 85,749 61,654 255.88 6,748 282.11 0.0015
2023-02-14 2022-12-31 13F MAXIMUS COM 577933104 24,095 24,095 1,767 0.0004
2022-11-14 2022-09-30 13F MAXIMUS COM 577933104 0 -53,154 -100.00 0 -100.00
2022-08-15 2022-06-30 13F MAXIMUS COM 577933104 53,154 53,154 3,323 0.0009
2022-05-16 2022-03-31 13F MAXIMUS COM 577933104 0 -31,351 -100.00 0 -100.00
2022-02-14 2021-12-31 13F MAXIMUS COM 577933104 31,351 959 3.16 2,498 -1.23 0.0005
2021-11-15 2021-09-30 13F MAXIMUS Cmn 577933104 30,392 -63,522 -67.64 2,529 -69.39 0.0005
2021-08-16 2021-06-30 13F MAXIMUS COM 577933104 93,914 -49,730 -34.62 8,262 -35.40 0.0018
2021-05-21 2021-03-31 13F/A-1 MAXIMUS COM 577933104 143,644 -117,917 -45.08 12,790 -33.19 0.0031
2021-05-17 2021-03-31 13F MAXIMUS COM 577933104 143,644 -117,917 12,790 0.0031
2021-02-16 2020-12-31 13F MAXIMUS COM 577933104 261,561 188,806 259.51 19,144 284.65 0.0050
2020-11-16 2020-09-30 13F MAXIMUS COM 577933104 72,755 -45,756 -38.61 4,977 -40.39 0.0014
2020-08-14 2020-06-30 13F MAXIMUS Cmn 577933104 118,511 42,867 56.67 8,349 89.66 0.0030
2020-05-15 2020-03-31 13F MAXIMUS Cmn 577933104 75,644 -171,400 -69.38 4,402 -76.05 0.0020
2020-02-14 2019-12-31 13F MAXIMUS Cmn 577933104 247,044 187,209 312.88 18,377 297.51 0.0080
2019-11-14 2019-09-30 13F MAXIMUS Cmn 577933104 59,835 9,171 18.10 4,623 25.80 0.0022
2019-08-14 2019-06-30 13F MAXIMUS Cmn 577933104 50,664 16,505 48.32 3,675 51.55 0.0017
2019-05-15 2019-03-31 13F MAXIMUS Cmn 577933104 34,159 -67,360 -66.35 2,425 -63.31 0.0012
2019-02-14 2018-12-31 13F MAXIMUS Cmn 577933104 101,519 -40,209 -28.37 6,609 -28.33 0.0036
2018-11-13 2018-09-30 13F MAXIMUS Cmn 577933104 141,728 36,986 35.31 9,221 41.75 0.0041
2018-08-14 2018-06-30 13F/A-1 MAXIMUS Cmn 577933104 104,742 30,783 41.62 6,505 31.79 0.0032
2018-08-10 2018-06-30 13F MAXIMUS Cmn 577933104 104,742 30,783 6,505
2018-05-14 2018-03-31 13F/A-1 MAXIMUS Cmn 577933104 73,959 -14,177 -16.09 4,936 -21.76 0.0027
2018-05-11 2018-03-31 13F MAXIMUS Cmn 577933104 73,959 -14,177 4,936
2018-02-09 2017-12-31 13F MAXIMUS Cmn 577933104 88,136 -43,432 -33.01 6,309 -25.66 0.0038
2017-11-09 2017-09-30 13F MAXIMUS Cmn 577933104 131,568 71,046 117.39 8,487 123.93 0.0065
2017-08-11 2017-06-30 13F MAXIMUS Cmn 577933104 60,522 38,575 175.76 3,790 177.66 0.0032
2017-05-12 2017-03-31 13F MAXIMUS Cmn 577933104 21,947 -32,273 -59.52 1,365 -54.88 0.0012
2017-02-10 2016-12-31 13F MAXIMUS Cmn 577933104 54,220 44,566 461.63 3,025 454.03 0.0031
2017-01-31 2016-09-30 13F/A-1 MAXIMUS Cmn 577933104 9,654 9,654 -82.19 546 -81.95 0.0005
2016-11-10 2016-09-30 13F MAXIMUS INC CMN STOCK Cmn 577933104 9,654 546
2016-08-12 2016-06-30 13F MAXIMUS INC CMN STOCK Cmn 577933104 0 -81,660 -100.00 0 -100.00
2017-01-31 2016-03-31 13F/A-1 MAXIMUS Cmn 577933104 81,660 81,660 0.00 4,299 0.0054
2016-05-13 2016-03-31 13F MAXIMUS INC CMN STOCK Cmn 577933104 81,660 4,299
2015-05-15 2015-03-31 13F MAXIMUS INC CMN STOCK Cmn 577933104 0 -171,823 -100.00 0 -100.00
2015-02-17 2014-12-31 13F MAXIMUS INC CMN STOCK Cmn 577933104 171,823 158,663 1,205.65 9,422 1,684.47 0.0114
2014-11-14 2014-09-30 13F MAXIMUS INC CMN STOCK Cmn 577933104 13,160 -56,139 -81.01 528 -82.29 0.0007
2014-08-14 2014-06-30 13F MAXIMUS INC CMN STOCK Cmn 577933104 69,299 -61,143 -46.87 2,981 -49.05 0.0040
2014-05-15 2014-03-31 13F MAXIMUS INC CMN STOCK Cmn 577933104 130,442 45,308 53.22 5,851 56.23 0.0081
2014-02-14 2013-12-31 13F MAXIMUS INC CMN STOCK Cmn 577933104 85,134 74,667 713.36 3,745 695.12 0.0049
2013-11-14 2013-09-30 13F MAXIMUS INC CMN STOCK Cmn 577933104 10,467 4,055 63.24 471 -1.46 0.0007
2013-08-14 2013-06-30 13F MAXIMUS INC CMN STOCK Cmn 577933104 6,412 6,412 478 0.0008
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
(%)
2025-08-14 2025-06-30 13F MAXIMUS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F MAXIMUS COM Call 2,900 -47.27 198 -51.95 n/a n/a n/a
2025-02-14 2024-12-31 13F MAXIMUS COM Call 5,500 -33.73 411 -46.96 n/a n/a n/a
2024-11-14 2024-09-30 13F MAXIMUS COM Call 8,300 591.67 773 657.84 n/a n/a n/a
2024-08-14 2024-06-30 13F MAXIMUS COM Call 1,200 200.00 103 209.09 n/a n/a n/a
2024-05-15 2024-03-31 13F MAXIMUS COM Call 400 -33.33 34 -34.00 n/a n/a n/a
2024-02-14 2023-12-31 13F MAXIMUS COM Call 600 -86.36 50 -84.76 n/a n/a n/a
2023-11-14 2023-09-30 13F MAXIMUS COM Call 4,400 4.76 329 -7.34 n/a n/a n/a
2023-08-14 2023-06-30 13F MAXIMUS COM Call 4,200 0.00 355 7.27 n/a n/a n/a
2023-05-15 2023-03-31 13F MAXIMUS COM Call 4,200 -48.78 331 -45.09 n/a n/a n/a
2023-02-14 2022-12-31 13F MAXIMUS COM Call 8,200 601 n/a n/a n/a
2022-11-14 2022-09-30 13F MAXIMUS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2022-08-15 2022-06-30 13F MAXIMUS COM Call 4,200 -58.42 263 -65.26 n/a n/a n/a
2022-05-16 2022-03-31 13F MAXIMUS COM Call 10,100 757 n/a n/a n/a
2022-03-11 2021-09-30 13F/A MAXIMUS COM Call 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-15 2021-09-30 13F MAXIMUS COM Call 0 0 n/a n/a n/a
2021-08-16 2021-06-30 13F MAXIMUS COM Call 27,400 -15.17 2,410 -16.20 n/a n/a n/a
2021-05-21 2021-03-31 13F/A MAXIMUS COM Call 32,300 487.27 2,876 613.65 n/a n/a n/a
2021-05-17 2021-03-31 13F MAXIMUS COM Call 32,300 2,876 n/a n/a n/a
2021-02-16 2020-12-31 13F MAXIMUS COM Call 5,500 -46.60 403 -42.84 n/a n/a n/a
2020-11-16 2020-09-30 13F MAXIMUS COM Call 10,300 -18.90 705 -21.23 n/a n/a n/a
2020-08-14 2020-06-30 13F MAXIMUS Cmn Call 12,700 64.94 895 99.78 n/a n/a n/a
2020-05-15 2020-03-31 13F MAXIMUS Cmn Call 7,700 -39.37 448 -49.94 n/a n/a n/a
2020-02-14 2019-12-31 13F MAXIMUS Cmn Call 0 -100.00 0 -100.00 n/a n/a n/a
2019-11-14 2019-09-30 13F MAXIMUS Cmn Call 6,400 -54.61 494 -51.71 n/a n/a n/a
2019-08-14 2019-06-30 13F MAXIMUS Cmn Call 14,100 45.36 1,023 48.48 n/a n/a n/a
2019-05-15 2019-03-31 13F MAXIMUS Cmn Call 9,700 79.63 689 96.30 n/a n/a n/a
2019-02-14 2018-12-31 13F MAXIMUS Cmn Call 5,400 -28.95 351 -28.95 n/a n/a n/a
2018-11-13 2018-09-30 13F MAXIMUS Cmn Call 7,600 26.67 494 32.44 n/a n/a n/a
2018-08-14 2018-06-30 13F/A MAXIMUS Cmn Call 6,000 -16.67 373 -22.45 n/a n/a n/a
2018-08-10 2018-06-30 13F MAXIMUS Cmn Call 6,000 373 n/a n/a n/a
2018-05-14 2018-03-31 13F/A MAXIMUS Cmn Call 7,200 53.19 481 43.15 n/a n/a n/a
2018-05-11 2018-03-31 13F MAXIMUS Cmn Call 7,200 481 n/a n/a n/a
2018-02-09 2017-12-31 13F MAXIMUS Cmn Call 4,700 38.24 336 53.42 n/a n/a n/a
2017-11-09 2017-09-30 13F MAXIMUS Cmn Call 3,400 -22.73 219 -20.07 n/a n/a n/a
2017-05-12 2017-03-31 13F MAXIMUS Cmn Call 4,400 -10.20 274 0.37 n/a n/a n/a
2017-02-10 2016-12-31 13F MAXIMUS Cmn Call 4,900 273 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 MAXIMUS COM Put 9,000 577 n/a n/a n/a
2025-08-14 2025-06-30 13F MAXIMUS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2025-05-15 2025-03-31 13F MAXIMUS COM Put 2,100 -46.15 143 -50.86 n/a n/a n/a
2025-02-14 2024-12-31 13F MAXIMUS COM Put 3,900 -25.00 291 -39.88 n/a n/a n/a
2024-11-14 2024-09-30 13F MAXIMUS COM Put 5,200 300.00 484 336.04 n/a n/a n/a
2024-08-14 2024-06-30 13F MAXIMUS COM Put 1,300 -7.14 111 -5.13 n/a n/a n/a
2024-05-15 2024-03-31 13F MAXIMUS COM Put 1,400 100.00 117 101.72 n/a n/a n/a
2024-02-14 2023-12-31 13F MAXIMUS COM Put 700 -22.22 59 -13.43 n/a n/a n/a
2023-11-14 2023-09-30 13F MAXIMUS COM Put 900 -71.88 67 -75.19 n/a n/a n/a
2023-08-14 2023-06-30 13F MAXIMUS COM Put 3,200 100.00 270 116.00 n/a n/a n/a
2023-05-15 2023-03-31 13F MAXIMUS COM Put 1,600 100.00 126 115.52 n/a n/a n/a
2023-02-14 2022-12-31 13F MAXIMUS COM Put 800 -82.22 59 -77.69 n/a n/a n/a
2022-11-14 2022-09-30 13F MAXIMUS COM Put 4,500 260 n/a n/a n/a
2022-08-15 2022-06-30 13F MAXIMUS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2022-05-16 2022-03-31 13F MAXIMUS COM Put 4,400 330 n/a n/a n/a
2022-03-11 2021-09-30 13F/A MAXIMUS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2021-11-15 2021-09-30 13F MAXIMUS COM Put 0 0 n/a n/a n/a
2021-08-16 2021-06-30 13F MAXIMUS COM Put 4,300 378 n/a n/a n/a
2021-02-16 2020-12-31 13F MAXIMUS COM Put 0 -100.00 0 -100.00 n/a n/a n/a
2020-11-16 2020-09-30 13F MAXIMUS COM Put 5,700 -65.66 390 -66.64 n/a n/a n/a
2020-08-14 2020-06-30 13F MAXIMUS Cmn Put 16,600 23.88 1,169 49.87 n/a n/a n/a
2020-05-15 2020-03-31 13F MAXIMUS Cmn Put 13,400 11.67 780 -12.65 n/a n/a n/a
2020-02-14 2019-12-31 13F MAXIMUS Cmn Put 12,000 287.10 893 272.08 n/a n/a n/a
2019-11-14 2019-09-30 13F MAXIMUS Cmn Put 3,100 -74.17 240 -73.12 n/a n/a n/a
2019-02-14 2018-12-31 13F MAXIMUS Cmn Put 0 -100.00 0 -100.00 n/a n/a n/a
2018-11-13 2018-09-30 13F MAXIMUS Cmn Put 7,200 1.41 468 6.12 n/a n/a n/a
2018-08-14 2018-06-30 13F/A MAXIMUS Cmn Put 7,100 86.84 441 73.62 n/a n/a n/a
2018-08-10 2018-06-30 13F MAXIMUS Cmn Put 7,100 441 n/a n/a n/a
2018-05-14 2018-03-31 13F/A MAXIMUS Cmn Put 3,800 -46.48 254 -42.40 n/a n/a n/a
2018-05-11 2018-03-31 13F MAXIMUS Cmn Put 3,800 254 n/a n/a n/a
2016-11-10 2016-09-30 13F MAXIMUS INC CMN STOCK Cmn Put 0 -100.00 0 -100.00 n/a n/a n/a
2017-01-31 2016-06-30 13F/A MAXIMUS Cmn Put 4,800 266 n/a n/a n/a
2016-08-12 2016-06-30 13F MAXIMUS INC CMN STOCK Cmn Put 4,800 266 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.