ACADIA Pharmaceuticals Inc.
US ˙ NasdaqGS ˙ US0042251084

SecurityACAD / ACADIA Pharmaceuticals Inc.
InstitutionSei Investments Co
Latest Disclosed Ownership154,130 shares
Latest Disclosed Value $ 4,116,808
Sei Investments Co reports 57.23% increase in ownership of ACAD / ACADIA Pharmaceuticals Inc.

On February 13, 2026 - Sei Investments Co filed a 13F-HR form disclosing ownership of 154,130 shares of ACADIA Pharmaceuticals Inc. (US:ACAD) valued at $4,116,812 USD as of December 31, 2025. The entity filed a previous 13F-HR on November 13, 2025 disclosing 98,030 shares of ACADIA Pharmaceuticals Inc.. This represents a change in shares of 57.23% during the quarter. The current value of the position is $3,303,006 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)
2026-02-13 2025-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 154,130 56,100 57.23 4,117 96.84 0.0041
2025-11-13 2025-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 98,030 7,123 7.84 2,092 6.68 0.0022
2025-08-14 2025-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 90,907 23,068 34.00 1,961 74.07 0.0023
2025-05-14 2025-03-31 13F/A-1 ACADIA PHARMACEUTICALS COM 004225108 67,839 17,409 34.52 1,127 21.73 0.0015
2025-05-13 2025-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 63,317 12,887 1,084 0.0012
2025-02-11 2024-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 50,430 18,399 57.44 925 88.01 0.0012
2024-11-12 2024-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 32,031 -703 -2.15 493 -7.34 0.0006
2024-08-13 2024-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 32,734 -2,018 -5.81 532 -17.29 0.0008
2024-05-07 2024-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 34,752 2,034 6.22 642 -37.30 0.0009
2024-02-14 2023-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 32,718 -19,473 -37.31 1,024 -5.80 0.0016
2023-11-14 2023-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 52,191 25,224 93.54 1,088 68.53 0.0020
2023-08-11 2023-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 26,967 2,541 10.40 646 40.52 0.0011
2023-05-12 2023-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 24,426 5,093 26.34 460 49.51 0.0009
2023-02-10 2022-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 19,333 6,656 52.50 308 48.31 0.0007
2022-11-14 2022-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 12,677 -477 -3.63 207 15.64 0.0005
2022-08-15 2022-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 13,154 -115,453 -89.77 179 -94.26 0.0004
2022-05-13 2022-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 128,607 -24,272 -15.88 3,116 -12.72 0.0063
2022-02-14 2021-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 152,879 -1,422 -0.92 3,570 39.56 0.0067
2021-11-12 2021-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 154,301 -2,712 -1.73 2,558 -33.23 0.0054
2021-08-06 2021-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 157,013 -7,779 -4.72 3,831 -18.05 0.0085
2021-05-12 2021-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 164,792 57,095 53.01 4,675 -18.45 0.0118
2021-02-08 2020-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 107,697 25,096 30.38 5,733 68.57 0.0148
2020-12-04 2020-09-30 13F/A-1 ACADIA PHARMACEUTICALS COM 004225108 82,601 -18,154 -18.02 3,401 -30.36 0.0098
2020-11-06 2020-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 82,601 -18,154 3,401 8,188.8518
2020-08-17 2020-06-30 13F/A-1 ACADIA PHARMACEUTICALS COM 004225108 100,755 -8,707 -7.95 4,884 5.55 0.0152
2020-08-11 2020-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 99,249 -10,213 4,336 11,761.6308
2020-05-14 2020-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 109,462 7,730 7.60 4,627 6.32 0.0170
2020-02-06 2019-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 101,732 -2,568 -2.46 4,352 15.96 0.0130
2019-11-12 2019-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 104,300 18,040 20.91 3,753 62.75 0.0096
2019-08-14 2019-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 86,260 10,711 14.18 2,306 13.71 0.0075
2019-05-15 2019-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 75,549 71,168 1,624.47 2,028 2,128.57 0.0068
2019-02-13 2018-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 4,381 -10,450 -70.46 91 -71.20 0.0003
2018-11-08 2018-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 14,831 -35,276 -70.40 316 -58.75 0.0011
2018-08-03 2018-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 50,107 49,170 5,247.60 766 3,547.62 0.0026
2018-05-11 2018-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 937 -21,224 -95.77 21 -96.85 0.0001
2018-02-08 2017-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 22,161 2,590 13.23 667 -9.50 0.0023
2017-11-06 2017-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 19,571 2,565 15.08 737 55.16 0.0026
2017-07-31 2017-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 17,006 -9,831 -36.63 475 -48.54 0.0019
2017-05-05 2017-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 26,837 15,755 142.17 923 188.44 0.0040
2017-02-02 2016-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 11,082 -67,658 -85.93 320 -87.23 0.0015
2016-11-04 2016-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 78,740 22,663 40.41 2,505 37.64 0.0127
2016-08-11 2016-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 56,077 26,000 86.44 1,820 116.41 0.0109
2016-05-10 2016-03-31 13F/A-1 ACADIA PHARMACEUTICALS COM 004225108 30,077 -4,737 -13.61 841 -32.18 0.0052
2016-02-03 2015-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 34,814 -29,722 -46.05 1,240 -41.92 0.0076
2015-11-02 2015-09-30 13F/A-1 ACADIA PHARMACEUTICALS COM 004225108 64,536 36,965 134.07 2,135 84.85 0.0196
2015-10-30 2015-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 64,536 2,136
2015-08-07 2015-06-30 13F/A-1 ACADIA PHARMACEUTICALS COM 004225108 27,571 -1,795 -6.11 1,155 20.69 0.0104
2015-08-04 2015-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 27,571 -1,795 1,155 0.0104
2015-05-14 2015-03-31 13F/A-1 ACADIA PHARMACEUTICALS COM 004225108 29,366 -7,142 -19.56 957 -17.50 0.0083
2015-05-01 2015-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 29,366 957
2015-02-10 2014-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 36,508 36,508 1,160 0.0103
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.