STATE OF WISCONSIN INVESTMENT BOARD
Position in PTCT — Ptc Therapeutics, Inc.
CIK 854157
MADISON, WI
Position in PTCT
as of Mar 31, 2026
· filed May 15, 2026
Position Value
$4,700,152
+$1,147,123 QoQ
Shares Held
68,988
+47.5% QoQ
Ownership
0.083%
of shares outstanding
% of Portfolio
0.01%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Mar 2020
25 quarters on record
Voting authority
Sole 100.ToString("F0")%
Shared 0.ToString("F0")%
None 0.ToString("F0")%
Common Shares in PTCT Over Time
Shares Held
Position Value (USD)
Position in Biotechnology
Healthcare · as of Mar 31, 2026STATE OF WISCONSIN INVESTMENT BOARD holds $473,382,633 across 164 Biotechnology names. PTCT ranks #26 (1.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | VRTX |
Vertex Pharmaceuticals Inc / Ma
|
136,548 | $60,974,143 | |
| 2 | REGN |
Regeneron Pharmaceuticals, Inc.
|
55,274 | $42,706,903 | |
| 3 | ALNY |
Alnylam Pharmaceuticals, Inc.
|
68,883 | $22,791,318 | |
| 4 | INSM |
INSMED Inc
|
114,346 | $18,697,857 | |
| 5 | XENE |
Xenon Pharmaceuticals Inc.
|
254,483 | $14,798,186 | |
| 6 | MRNA |
Moderna, Inc.
|
227,162 | $11,539,829 | |
| 7 | INCY |
Incyte Corp
|
116,878 | $11,000,557 | |
| 8 | TECH |
BIO-TECHNE Corp
|
208,871 | $10,915,598 |
All Filings in PTCT
Export CSV
25 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $4,700,152 | 68,988 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $3,553,029 | 46,775 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $3,607,635 | 58,785 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $2,386,273 | 48,859 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $3,402,701 | 66,772 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $3,758,943 | 83,273 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $1,812,706 | 48,860 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $1,765,628 | 57,738 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $1,390,472 | 47,799 | Shares | Sole | 2024-05-14 | |
| 2023-12-31 | $2,142,266 | 77,731 | Shares | Sole | 2024-02-12 | |
| 2023-09-30 | $1,337,115 | 59,666 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $2,310,422 | 56,809 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $2,892,303 | 59,709 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $2,466,850 | 64,628 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $3,296,834 | 65,674 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $2,764,059 | 68,998 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $3,380,286 | 90,600 | Shares | Sole | 2022-05-13 | |
| 2021-12-31 | $3,608,598 | 90,600 | Shares | Sole | 2022-02-11 | |
| 2021-09-30 | $3,371,226 | 90,600 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $3,516,864 | 83,200 | Shares | Sole | 2021-08-12 | |
| 2021-03-31 | $3,939,520 | 83,200 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $5,382,846 | 88,200 | Shares | Sole | 2021-02-03 | |
| 2020-09-30 | $4,637,600 | 99,200 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $5,033,408 | 99,200 | Shares | Sole | 2020-08-12 | |
| 2020-03-31 | $4,269,177 | 95,700 | Shares | Sole | 2020-05-06 | |
| No filing history on record for this holder in this stock. | ||||||