ACADIA Pharmaceuticals Inc.
US ˙ NasdaqGS ˙ US0042251084

SecurityACAD / ACADIA Pharmaceuticals Inc.
InstitutionState Street Corp
Latest Disclosed Ownership8,332,771 shares
Latest Disclosed Value $ 185,487,482
State Street Corp reports 5.34% increase in ownership of ACAD / ACADIA Pharmaceuticals Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 8,332,771 shares of ACADIA Pharmaceuticals Inc. (US:ACAD) valued at $185,487,482 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 7,910,733 shares of ACADIA Pharmaceuticals Inc.. This represents a change in shares of 5.34% during the quarter. The current value of the position is $180,987,786 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 ACADIA PHARMACEUTICALS COM 004225108 8,332,771 422,038 5.34 185,487 -12.21 0.0064
2026-02-13 2025-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 7,910,733 655,257 9.03 211,296 36.47 0.0071
2025-11-14 2025-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 7,255,476 1,077,432 17.44 154,832 16.19 0.0054
2025-08-14 2025-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 6,178,044 -815,469 -11.66 133,260 14.72 0.0050
2025-05-15 2025-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 6,993,513 2,472,128 54.68 116,162 40.01 0.0048
2025-02-14 2024-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 4,521,385 -1,452,489 -24.31 82,967 -9.70 0.0033
2024-11-14 2024-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 5,973,874 173,084 2.98 91,878 -2.53 0.0037
2024-08-14 2024-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 5,800,790 -200,613 -3.34 94,263 -15.05 0.0041
2024-05-15 2024-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 6,001,403 -463,623 -7.17 110,966 -45.18 0.0050
2024-02-14 2023-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 6,465,026 1,251,295 24.00 202,420 86.30 0.0098
2023-11-14 2023-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 5,213,731 -206,587 -3.81 108,654 -16.30 0.0060
2023-08-14 2023-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 5,420,318 -166,543 -2.98 129,817 23.46 0.0068
2023-05-15 2023-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 5,586,861 -2,153,477 -27.82 105,145 -14.67 0.0059
2023-05-15 2022-12-31 13F/A-99 ACADIA PHARMACEUTICALS COM 004225108 7,740,338 961,467 14.18 123,226 11.11 0.0072
2023-05-15 2022-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 7,740,338 961,467 123,226 0.0072
2022-11-15 2022-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 6,778,871 184,921 2.80 110,902 19.37 0.0070
2022-08-15 2022-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 6,593,950 1,536,756 30.39 92,909 -24.15 0.0056
2022-05-16 2022-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 5,057,194 237,241 4.92 122,485 8.88 0.0061
2022-02-14 2021-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 4,819,953 -908,370 -15.86 112,498 18.24 0.0053
2021-11-15 2021-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 5,728,323 1,757,712 44.27 95,147 -1.75 0.0050
2021-08-16 2021-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 3,970,611 761,973 23.75 96,843 16.98 0.0051
2021-07-09 2021-03-31 13F/A-1 ACADIA PHARMACEUTICALS COM 004225108 3,208,638 598,812 22.94 82,783 -40.67 0.0047
2021-05-17 2021-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 3,208,638 598,812 82,783 0.0047
2021-02-16 2020-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 2,609,826 -92,758 -3.43 139,521 25.15 0.0085
2020-11-10 2020-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 2,702,584 134,840 5.25 111,482 -10.43 0.0076
2020-08-14 2020-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 2,567,744 -1,474,552 -36.48 124,459 -27.13 0.0090
2020-06-19 2020-03-31 13F/A-1 ACADIA PHARMACEUTICALS COM 004225108 4,042,296 38,619 0.96 170,787 -0.29 0.0149
2020-05-11 2020-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 4,042,296 38,619 170,787 14,998.5374
2020-02-06 2019-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 4,003,677 548,277 15.87 171,277 37.73 0.0117
2019-11-14 2019-09-30 13F ACADIA PHARMACEUTICALS COM 004225108 3,455,400 -1,189,463 -25.61 124,360 0.16 0.0093
2019-08-14 2019-06-30 13F ACADIA PHARMACEUTICALS COM 004225108 4,644,863 -220,834 -4.54 124,157 -4.97 0.0093
2019-05-15 2019-03-31 13F ACADIA PHARMACEUTICALS COM 004225108 4,865,697 26,511 0.55 130,644 66.96 0.0102
2019-02-12 2018-12-31 13F ACADIA PHARMACEUTICALS COM 004225108 4,839,186 -1,999,013 -29.23 78,250 -44.88 0.0071
2018-11-09 2018-09-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 6,838,199 1,011,324 17.36 141,959 59.54 0.0109
2018-08-14 2018-06-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 5,826,875 1,651,126 39.54 88,978 -5.17 0.0074
2018-05-15 2018-03-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 4,175,749 852,811 25.66 93,826 -6.22 0.0080
2018-02-14 2017-12-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 3,322,938 82,559 2.55 100,047 -18.04 0.0080
2017-11-14 2017-09-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 3,240,379 -508,089 -13.55 122,067 16.75 0.0105
2017-08-14 2017-06-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 3,748,468 510,670 15.77 104,551 -6.08 0.0092
2017-05-15 2017-03-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 3,237,798 -116,228 -3.47 111,319 15.08 0.0099
2017-02-09 2016-12-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 3,354,026 246,198 7.92 96,728 -2.15 0.0091
2017-01-13 2016-09-30 13F/A-1 ACADIA PHARMACEUTICALS Common equity shares 004225108 3,107,828 832,503 36.59 98,857 33.85 0.0100
2016-11-14 2016-09-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 3,107,828 98,857
2016-08-12 2016-06-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 2,275,325 -1,089,101 -32.37 73,858 -21.49 0.0079
2016-05-20 2016-03-31 13F/A-1 ACADIA PHARMACEUTICALS Common equity shares 004225108 3,364,426 997,205 42.13 94,072 11.47 0.0102
2016-05-12 2016-03-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 3,364,426 94,072
2016-02-16 2015-12-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 2,367,221 379,117 19.07 84,391 28.35 0.0092
2015-11-16 2015-09-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 1,988,104 63,016 3.27 65,749 -18.45 0.0077
2015-08-13 2015-06-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 1,925,088 -4,522 -0.23 80,622 28.20 0.0086
2015-05-15 2015-03-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 1,929,610 139,984 7.82 62,887 10.67 0.0065
2015-02-11 2014-12-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 1,789,626 -97,391 -5.16 56,824 21.64 0.0057
2014-11-12 2014-09-30 13F/A-1 ACADIA PHARMACEUTICALS Common equity shares 004225108 1,887,017 -103,408 -5.20 46,716 3.89 0.0050
2014-11-10 2014-09-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 1,887,017 46,716
2014-08-12 2014-06-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 1,990,425 -33,906 -1.67 44,965 -8.70 0.0049
2014-05-15 2014-03-31 13F/A-1 ACADIA PHARMACEUTICALS Common equity shares 004225108 2,024,331 90,216 4.66 49,252 1.92 0.0056
2014-05-13 2014-03-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 2,025,199 49,273
2014-02-06 2013-12-31 13F/A-1 ACADIA PHARMACEUTICALS Common equity shares 004225108 1,934,115 -174,765 -8.29 48,324 -16.58 0.0054
2014-02-06 2013-12-31 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 25,160 116
2013-11-12 2013-09-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 2,108,880 140,938 7.16 57,930 62.19 0.0071
2013-08-08 2013-06-30 13F ACADIA PHARMACEUTICALS Common equity shares 004225108 1,967,942 1,967,942 35,717 0.0047
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.