PTC Therapeutics, Inc.
US ˙ NasdaqGS ˙ US69366J2006

SecurityPTCT / PTC Therapeutics, Inc.
InstitutionStrs Ohio
Latest Disclosed Ownership21,400 shares
Latest Disclosed Value $ 1,457,982
Strs Ohio reports 3.88% increase in ownership of PTCT / PTC Therapeutics, Inc.

On April 24, 2026 - Strs Ohio filed a 13F-HR form disclosing ownership of 21,400 shares of PTC Therapeutics, Inc. (US:PTCT) valued at $1,457,982 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 20,600 shares of PTC Therapeutics, Inc.. This represents a change in shares of 3.88% during the quarter. The current value of the position is $1,469,752 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)
2026-04-24 2026-03-31 13F PTC THERAPEUTICS COM_STK 69366J200 21,400 800 3.88 1,458 -6.84 0.0058
2026-02-02 2025-12-31 13F PTC THERAPEUTICS COM_STK 69366J200 20,600 -2,000 -8.85 1,565 12.84 0.0058
2025-10-30 2025-09-30 13F PTC THERAPEUTICS COM_STK 69366J200 22,600 -1,200 -5.04 1,387 19.28 0.0051
2025-08-04 2025-06-30 13F PTC THERAPEUTICS COM_STK 69366J200 23,800 15,200 176.74 1,162 165.30 0.0043
2025-05-28 2025-03-31 13F PTC THERAPEUTICS COM_STK 69366J200 8,600 0 0.00 438 12.89 0.0018
2025-05-28 2024-12-31 13F PTC THERAPEUTICS COM_STK 69366J200 8,600 -12,600 -59.43 388 -50.64 0.0015
2024-11-01 2024-09-30 13F PTC THERAPEUTICS COM_STK 69366J200 21,200 19,200 960.00 787 1,188.52 0.0030
2024-08-05 2024-06-30 13F PTC THERAPEUTICS COM_STK 69366J200 2,000 2,000 61 0.0002
2024-05-13 2024-03-31 13F PTC THERAPEUTICS COM 69366J200 0 -2,200 -100.00 0 0.0000
2024-01-30 2023-12-31 13F PTC THERAPEUTICS COM 69366J200 2,200 -500 -18.52 0 0.0002
2023-10-26 2023-09-30 13F/A-1 PTC THERAPEUTICS COM 69366J200 2,700 -3,900 -59.09 0 0.0003
2023-10-26 2023-09-30 13F PTC THERAPEUTICS COM 69366J200 2,700 -3,900 0 0.0003
2023-07-31 2023-06-30 13F PTC THERAPEUTICS COM 69366J200 6,600 2,200 50.00 0 0.0011
2023-08-02 2023-03-31 13F/A-2 PTC THERAPEUTICS COM 69366J200 4,400 700 18.92 0 0.0009
2023-08-02 2023-03-31 13F/A-1 PTC THERAPEUTICS COM 69366J200 4,400 700 0 0.0009
2023-04-27 2023-03-31 13F PTC THERAPEUTICS COM 69366J200 4,400 700 0 0.0011
2023-01-26 2022-12-31 13F PTC THERAPEUTICS COM 69366J200 3,700 -21,200 -85.14 0 -100.00 0.0006
2022-10-27 2022-09-30 13F PTC THERAPEUTICS COM 69366J200 24,900 21,300 591.67 1,249 767.36 0.0060
2022-07-25 2022-06-30 13F PTC THERAPEUTICS COM 69366J200 3,600 0 0.00 144 7.46 0.0006
2022-04-21 2022-03-31 13F PTC THERAPEUTICS COM 69366J200 3,600 0 0.00 134 -6.29 0.0005
2022-01-24 2021-12-31 13F PTC THERAPEUTICS COM 69366J200 3,600 -5,100 -58.62 143 -55.73 0.0005
2021-10-22 2021-09-30 13F PTC THERAPEUTICS COM 69366J200 8,700 -6,500 -42.76 323 -49.69 0.0012
2021-07-26 2021-06-30 13F PTC THERAPEUTICS COM 69366J200 15,200 300 2.01 642 -8.94 0.0023
2021-04-23 2021-03-31 13F PTC THERAPEUTICS COM 69366J200 14,900 -3,600 -19.46 705 -37.56 0.0027
2021-01-25 2020-12-31 13F PTC THERAPEUTICS COM 69366J200 18,500 -4,000 -17.78 1,129 7.42 0.0044
2020-12-14 2020-09-30 13F PTC THERAPEUTICS COM 69366J200 22,500 -1,800 -7.41 1,051 -14.69 0.0044
2020-07-23 2020-06-30 13F PTC THERAPEUTICS COM 69366J200 24,300 -1,000 -3.95 1,232 9.22 0.0054
2020-04-23 2020-03-31 13F PTC THERAPEUTICS COM 69366J200 25,300 -1,400 -5.24 1,128 -12.01 0.0059
2020-01-24 2019-12-31 13F PTC THERAPEUTICS COM 69366J200 26,700 0 0.00 1,282 42.13 0.0054
2019-10-21 2019-09-30 13F/A-1 PTC THERAPEUTICS COM 69366J200 26,700 12,000 81.63 902 36.46 0.0040
2019-10-21 2019-09-30 13F PTC THERAPEUTICS COM 69366J200 26,700 0 902 3,992.3020
2019-07-25 2019-06-30 13F PTC THERAPEUTICS COM 69366J200 14,700 1,000 7.30 661 28.35 0.0029
2019-04-19 2019-03-31 13F PTC THERAPEUTICS COM 69366J200 13,700 0 0.00 515 9.57 0.0023
2019-01-23 2018-12-31 13F PTC THERAPEUTICS COM 69366J200 13,700 500 3.79 470 -24.19 0.0024
2018-10-19 2018-09-30 13F PTC THERAPEUTICS COM 69366J200 13,200 13,200 620 0.0027
2015-10-21 2015-09-30 13F PTC THERAPEUTICS COM 69366J200 0 -3,300 -100.00 0 -100.00
2015-08-04 2015-06-30 13F PTC THERAPEUTICS COM 69366J200 3,300 -1,100 -25.00 158 68.09 0.0007
2013-10-24 2013-09-30 13F PTC THERAPEUTICS COM 69366J200 4,400 4,400 94 0.0004
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.