Supernus Pharmaceuticals, Inc.
US ˙ NasdaqGM ˙ US8684591089

SecuritySUPN / Supernus Pharmaceuticals, Inc.
InstitutionFmr Llc
Latest Disclosed Ownership209,370 shares
Latest Disclosed Value $ 10,822,353
Fmr Llc reports 68.40% increase in ownership of SUPN / Supernus Pharmaceuticals, Inc.

On May 15, 2026 - Fmr Llc filed a 13F-HR form disclosing ownership of 209,370 shares of Supernus Pharmaceuticals, Inc. (US:SUPN) valued at $10,822,335 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 124,331 shares of Supernus Pharmaceuticals, Inc.. This represents a change in shares of 68.40% during the quarter. The current value of the position is $9,219,608 USD.

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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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 SUPERNUS PHARMACEUTICALS COM 868459108 209,370 85,039 68.40 10,822 75.14 0.0001
2026-02-17 2025-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 124,331 23,894 23.79 6,179 28.76 0.0003
2025-11-13 2025-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 100,437 19,584 24.22 4,800 88.34 0.0002
2025-08-14 2025-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 80,853 3,238 4.17 2,548 0.28 0.0001
2025-05-12 2025-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 77,615 7,174 10.18 2,542 -0.24 0.0002
2025-02-13 2024-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 70,441 53,538 316.74 2,547 383.30 0.0002
2024-11-13 2024-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 16,903 8,499 101.13 527 135.27 0.0000
2024-08-13 2024-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 8,404 409 5.12 225 -17.65 0.0000
2024-05-13 2024-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 7,995 110 1.40 273 19.30 0.0000
2024-02-13 2023-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 7,885 173 2.24 228 7.55 0.0000
2023-11-13 2023-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 7,712 -8,538 -52.54 213 -56.56 0.0000
2023-08-11 2023-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 16,250 -651 -3.85 488 -20.26 0.0000
2023-08-11 2023-03-31 13F/A-1 SUPERNUS PHARMACEUTICALS COM 868459108 16,901 8,277 95.98 612 99.35 0.0001
2023-05-11 2023-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 16,901 8,277 612 0.0000
2023-02-13 2022-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 8,624 -28,175 -76.56 308 -75.36 0.0000
2022-11-10 2022-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 36,799 519 1.43 1,246 18.78 0.0001
2022-08-12 2022-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 36,280 -6,229 -14.65 1,049 -23.65 0.0001
2022-05-13 2022-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 42,509 -211,392 -83.26 1,374 -81.44 0.0001
2022-02-14 2021-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 253,901 -50,512 -16.59 7,403 -8.82 0.0005
2022-02-14 2021-09-30 13F/A-1 SUPERNUS PHARMACEUTICALS COM 868459108 304,413 -935,682 -75.45 8,119 -78.74 0.0006
2021-11-15 2021-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 304,413 -935,682 8,119 0.0006
2021-08-13 2021-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 1,240,095 434,521 53.94 38,182 81.05 0.0030
2021-05-14 2021-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 805,574 246,375 44.06 21,089 49.89 0.0018
2021-02-08 2020-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 559,199 425,790 319.16 14,070 405.93 0.0013
2020-11-13 2020-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 133,409 -124 -0.09 2,781 -12.33 0.0003
2020-08-24 2020-06-30 13F/A-1 SUPERNUS PHARMACEUTICALS COM 868459108 133,533 4,806 3.73 3,172 36.96 0.0003
2020-08-13 2020-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 133,533 4,806 3,172 77.9268
2020-05-14 2020-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 128,727 -335,787 -72.29 2,316 -78.98 0.0003
2020-02-07 2019-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 464,514 -43,514 -8.57 11,018 -21.07 0.0012
2019-11-13 2019-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 508,028 -152,329 -23.07 13,960 -36.11 0.0017
2019-08-13 2019-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 660,357 -76,711 -10.41 21,851 -15.39 0.0026
2019-05-13 2019-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 737,068 -1,345,247 -64.60 25,826 -62.67 0.0031
2019-02-13 2018-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 2,082,315 -289,006 -12.19 69,174 -42.06 0.0095
2018-11-09 2018-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 2,371,321 1,430,021 151.92 119,396 111.93 0.0134
2018-08-10 2018-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 941,300 894,459 1,909.56 56,337 2,526.43 0.0067
2018-05-14 2018-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 46,841 -6,759 -12.61 2,145 0.42 0.0003
2018-02-12 2017-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 53,600 -12,300 -18.66 2,136 -18.97 0.0003
2017-11-13 2017-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 65,900 -38,200 -36.70 2,636 -41.25 0.0003
2017-08-29 2017-06-30 13F/A-1 SUPERNUS PHARMACEUTICALS COM 868459108 104,100 0 0.00 4,487 37.72 0.0006
2017-08-11 2017-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 104,100 0 4,487
2017-05-11 2017-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 104,100 -38,800 -27.15 3,258 -9.70 0.0004
2017-02-10 2016-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 142,900 -420,400 -74.63 3,608 -74.10 0.0005
2016-11-14 2016-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 563,300 -509,300 -47.48 13,930 -36.24 0.0019
2016-08-11 2016-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 1,072,600 -189,100 -14.99 21,849 13.55 0.0030
2016-05-16 2016-03-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 1,261,700 823,000 187.60 19,241 226.34 0.0027
2016-02-12 2015-12-31 13F SUPERNUS PHARMACEUTICALS COM 868459108 438,700 200 0.05 5,896 -4.16 0.0008
2015-11-10 2015-09-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 438,500 -14,500 -3.20 6,152 -20.02 0.0009
2015-08-25 2015-06-30 13F/A-1 SUPERNUS PHARMACEUTICALS COM 868459108 453,000 453,000 7,692 0.0010
2015-08-13 2015-06-30 13F SUPERNUS PHARMACEUTICALS COM 868459108 453,000 7,692 0.0010
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.