PTC Therapeutics, Inc.
US ˙ NasdaqGS ˙ US69366J2006

SecurityPTCT / PTC Therapeutics, Inc.
InstitutionInvesco Ltd.
Latest Disclosed Ownership865,451 shares
Latest Disclosed Value $ 58,963,177
Invesco Ltd. reports 99.28% increase in ownership of PTCT / PTC Therapeutics, Inc.

On May 12, 2026 - Invesco Ltd. filed a 13F-HR form disclosing ownership of 865,451 shares of PTC Therapeutics, Inc. (US:PTCT) valued at $58,963,177 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 19, 2026 disclosing 434,285 shares of PTC Therapeutics, Inc.. This represents a change in shares of 99.28% during the quarter. The current value of the position is $59,439,175 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)
2026-05-12 2026-03-31 13F PTC THERAPEUTICS COM 69366J200 865,451 431,166 99.28 58,963 78.74 0.0011
2026-02-19 2025-12-31 13F PTC THERAPEUTICS COM 69366J200 434,285 121,228 38.72 32,988 71.71 0.0051
2025-11-13 2025-09-30 13F PTC THERAPEUTICS COM 69366J200 313,057 9,823 3.24 19,212 29.73 0.0030
2025-08-13 2025-06-30 13F PTC THERAPEUTICS COM 69366J200 303,234 -7,095 -2.29 14,810 -6.36 0.0025
2025-05-12 2025-03-31 13F PTC THERAPEUTICS COM 69366J200 310,329 198,938 178.59 15,814 214.52 0.0030
2025-02-13 2024-12-31 13F PTC THERAPEUTICS COM 69366J200 111,391 57,582 107.01 5,028 151.90 0.0009
2024-11-12 2024-09-30 13F PTC THERAPEUTICS COM 69366J200 53,809 -229,001 -80.97 1,996 -76.92 0.0004
2024-08-13 2024-06-30 13F PTC THERAPEUTICS COM 69366J200 282,810 -21,820 -7.16 8,648 -2.40 0.0018
2024-05-14 2024-03-31 13F PTC THERAPEUTICS COM 69366J200 304,630 -8,547 -2.73 8,862 2.66 0.0019
2024-02-13 2023-12-31 13F PTC THERAPEUTICS COM 69366J200 313,177 104,451 50.04 8,631 84.54 0.0021
2023-11-13 2023-09-30 13F PTC THERAPEUTICS COM 69366J200 208,726 44,529 27.12 4,678 -29.95 0.0013
2023-08-11 2023-06-30 13F PTC THERAPEUTICS COM 69366J200 164,197 -84,877 -34.08 6,678 -44.66 0.0018
2023-05-12 2023-03-31 13F PTC THERAPEUTICS COM 69366J200 249,074 28,253 12.79 12,065 43.15 0.0034
2023-02-13 2022-12-31 13F PTC THERAPEUTICS COM 69366J200 220,821 120,150 119.35 8,429 66.79 0.0025
2022-11-14 2022-09-30 13F PTC THERAPEUTICS COM 69366J200 100,671 -136,448 -57.54 5,053 -46.80 0.0016
2022-08-15 2022-06-30 13F PTC THERAPEUTICS COM 69366J200 237,119 190,370 407.22 9,499 444.36 0.0029
2022-05-16 2022-03-31 13F PTC THERAPEUTICS COM 69366J200 46,749 4,000 9.36 1,745 2.53 0.0004
2022-02-14 2021-12-31 13F PTC THERAPEUTICS COM 69366J200 42,749 -2,221 -4.94 1,702 1.67 0.0004
2021-11-15 2021-09-30 13F PTC THERAPEUTICS COM 69366J200 44,970 5,347 13.49 1,674 -0.06 0.0004
2021-08-17 2021-06-30 13F PTC THERAPEUTICS COM 69366J200 39,623 11,041 38.63 1,675 23.80 0.0004
2021-05-17 2021-03-31 13F PTC THERAPEUTICS COM 69366J200 28,582 8,756 44.16 1,353 11.82 0.0004
2021-02-16 2020-12-31 13F PTC THERAPEUTICS COM 69366J200 19,826 8,324 72.37 1,210 125.33 0.0004
2020-11-16 2020-09-30 13F PTC THERAPEUTICS COM 69366J200 11,502 -52 -0.45 537 -8.36 0.0002
2020-08-14 2020-06-30 13F PTC THERAPEUTICS COM 69366J200 11,554 -120,407 -91.24 586 -90.05 0.0002
2020-05-15 2020-03-31 13F PTC THERAPEUTICS COM 69366J200 131,961 125,968 2,101.92 5,887 1,944.10 0.0025
2020-02-14 2019-12-31 13F PTC THERAPEUTICS COM 69366J200 5,993 -367 -5.77 288 33.95 0.0001
2019-11-14 2019-09-30 13F PTC THERAPEUTICS COM 69366J200 6,360 -180 -2.75 215 -26.87 0.0001
2019-08-14 2019-06-30 13F/A-1 PTC THERAPEUTICS COM 69366J200 6,540 -245,539 -97.41 294 -96.90 0.0001
2019-08-14 2019-06-30 13F PTC THERAPEUTICS COM 69366J200 6,540 -245,539 294
2019-05-15 2019-03-31 13F PTC THERAPEUTICS COM 69366J200 252,079 33,393 15.27 9,488 26.42 0.0032
2019-02-14 2018-12-31 13F PTC THERAPEUTICS COM 69366J200 218,686 -2,646 -1.20 7,505 -27.86 0.0029
2018-11-14 2018-09-30 13F PTC THERAPEUTICS COM 69366J200 221,332 -228,252 -50.77 10,403 -31.40 0.0033
2018-08-14 2018-06-30 13F PTC THERAPEUTICS COM 69366J200 449,584 449,584 15,164 0.0050
2018-05-15 2018-03-31 13F PTC THERAPEUTICS COM 69366J200 0 -157,017 -100.00 0 -100.00
2018-02-14 2017-12-31 13F PTC THERAPEUTICS COM 69366J200 157,017 -97,441 -38.29 2,619 -48.57 0.0009
2017-11-14 2017-09-30 13F PTC THERAPEUTICS COM 69366J200 254,458 236,880 1,347.59 5,092 1,481.37 0.0019
2017-08-14 2017-06-30 13F PTC THERAPEUTICS COM 69366J200 17,578 -220 -1.24 322 84.00 0.0001
2017-05-15 2017-03-31 13F PTC THERAPEUTICS COM 69366J200 17,798 -70,523 -79.85 175 -81.85 0.0001
2017-02-14 2016-12-31 13F PTC THERAPEUTICS COM 69366J200 88,321 88,321 0.00 964 0.0003
2016-02-16 2015-12-31 13F PTC THERAPEUTICS COM 69366J200 0 -56,527 -100.00 0 -100.00
2015-11-16 2015-09-30 13F PTC THERAPEUTICS COM 69366J200 56,527 56,422 53,735.24 1,510 30,100.00 0.0006
2015-08-14 2015-06-30 13F PTC THERAPEUTICS COMMON 69366J200 105 -93,011 -99.89 5 -99.91 0.0000
2015-05-15 2015-03-31 13F PTC THERAPEUTICS COMMON 69366J200 93,116 -7,007 -7.00 5,666 9.30 0.0022
2015-02-13 2014-12-31 13F PTC THERAPEUTICS COMMON 69366J200 100,123 -13,123 -11.59 5,184 4.01 0.0020
2014-11-14 2014-09-30 13F PTC THERAPEUTICS COMMON 69366J200 113,246 33,663 42.30 4,984 139.62 0.0020
2014-08-14 2014-06-30 13F PTC THERAPEUTICS COMMON 69366J200 79,583 2,021 2.61 2,080 2.61 0.0008
2014-05-15 2014-03-31 13F PTC THERAPEUTICS COMMON 69366J200 77,562 -251 -0.32 2,027 53.56 0.0008
2014-02-13 2013-12-31 13F PTC THERAPEUTICS COMMON 69366J200 77,813 26,074 50.40 1,320 18.92 0.0005
2013-11-13 2013-09-30 13F PTC THERAPEUTICS COMMON 69366J200 51,739 51,739 1,110 0.0005
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.