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Of the 11 tracked institutions holding PTCT, 5 have a 3-year clone track record — 5 of them beat the S&P. Average holder's clone alpha: +6.0pt. It's a gauge of who owns the name, not just how many.
Among the 11 tracked institutional investors we monitor, PTCT (PTC THERAPEUTICS INC) is held with a combined value of $2.48B across 35,424,171 shares. The largest holder is BlackRock, Inc. with a position worth $882.20M (0.02% of their portfolio). Fisher Asset Management, LLC opened a new position in the most recent quarter. 6 funds increased their holdings. 4 funds reduced their position.
Total Institutional Value
$2.48B
Total Shares Held
35,424,171
Institutional Holders
11
% of Shares Outstanding
≥100%
of 8.29M shares · SEC 2026-05-05
Days to Cover
4.8-43.2%
9.83M shares short · FINRA 2026-07-15
Tracked 13F institutions hold ≥100% of PTCT's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-05-05), not a live float.
Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.
| # | Fund | Value↓ | Portfolio % | Change |
|---|---|---|---|---|
| 1 | BlackRock, Inc. | $882.20M | 0.02% | +1.3% |
| 2 | VANGUARD GROUP INC | $668.69M | 0.01% | +6.2% |
| 3 | STATE STREET CORP | $296.13M | 0.01% | +3.3% |
| 4 | WELLINGTON MANAGEMENT GROUP LLP | $268.61M | 0.05% | +1.9% |
| 5 | ARMISTICE CAPITAL, LLC | $141.33M | 4.67% | -26.0% |
| 6 | FMR LLC | $104.13M | 0.01% | -9.1% |
| 7 | RENAISSANCE TECHNOLOGIES LLC | $36.33M | 0.06% | -12.2% |
| 8 | PRICE T ROWE ASSOCIATES INC /MD/ | $32.37M | 0.00% | +3.3% |
| 9 | CITADEL ADVISORS LLC | $26.24M | 0.02% | -66.6% |
| 10 | AQR CAPITAL MANAGEMENT LLC | $23.31M | 0.01% | +0.1% |
As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of PTCT with a position worth $882.20M, representing 0.02% of their portfolio. In total, 11 institutional investors hold PTCT with a combined value of $2.48B.
In the most recent quarter, 1 fund opened a new position in PTCT. Additionally, 6 increased their holdings and 4 reduced their positions.
Institutional investors hold $2.48B worth of PTCT stock across 11 positions. The largest institutional holder is BlackRock, Inc. with $882.20M in holdings.
A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For PTCT, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.
Get notified when hedge funds change their PTCT positions.
Alpha = the manager's 3-year clone return minus the S&P 500. A skilled roster is a stronger tell than a crowded one — though even skilled managers' edge doesn't reliably survive the 13F disclosure lag. Why →
Last Close
$76.82
2026-07-24
YTD
+0.1%
72% of 52-week range
