# PTC THERAPEUTICS INC COM

PTC THERAPEUTICS INC COM is a security (CUSIP 69366J200) tracked across SEC portfolio filings. 380 institutional managers reported $6.4B on Form 13F as of 2026-06-30; 36 registered fund positions totaling $345.4M via N-PORT as of 2026-05-31.

## Summary

- Issuer: PTC THERAPEUTICS INC
- Class: COM
- CUSIP: 69366J200
- Asset category: EC
- 13F holders: 380
- 13F value: $6.4B
- 13F period: 2026-06-30
- N-PORT fund positions: 36
- N-PORT value: $345.4M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 380 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $882.2M | 12,948,717 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $668.7M | 8,803,203 |
| [RTW INVESTMENTS, LP](https://search.stillhousedata.com/firm/153232) | NEW YORK, NY | $527.8M | 7,746,415 |
| JANUS HENDERSON GROUP PLC | LONDON, X0 | $490.0M | 7,193,433 |
| STATE STREET CORP | BOSTON, MA | $296.1M | 4,346,519 |
| WELLINGTON MANAGEMENT GROUP LLP | BOSTON, MA | $268.6M | 3,942,610 |
| TORONTO DOMINION BANK | Toronto, Ontario, A6 | $206.2M | 3,025,945 |
| [ARMISTICE CAPITAL, LLC](https://search.stillhousedata.com/firm/168978) | NEW YORK, NY | $167.9M | 2,074,449 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $150.6M | 2,209,954 |
| BANK OF AMERICA CORP /DE/ | CHARLOTTE, NC | $128.6M | 1,886,841 |
| Hood River Capital Management LLC | PALM BEACH GARDENS, FL | $113.4M | 1,664,559 |
| D. E. Shaw & Co., Inc. | New York, NY | $111.8M | 1,640,381 |
| FMR LLC | BOSTON, MA | $104.1M | 1,528,362 |
| TANG CAPITAL MANAGEMENT LLC | SAN DIEGO, CA | $102.2M | 1,500,000 |
| Pictet Asset Management Holding SA | CAROUGE, V8 | $93.6M | 1,147,844 |

## Top fund holders (N-PORT)

_Showing 15 of 36 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD HEALTH CARE FUND](https://search.stillhousedata.com/fund/S000002922) | VANGUARD SPECIALIZED FUNDS | $132.6M | 35.97% |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $61.1M | 7.50% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $29.9M | 17.04% |
| [Janus Henderson Venture Fund](https://search.stillhousedata.com/fund/S000010488) | JANUS INVESTMENT FUND | $24.0M | 78.45% |
| [LORD ABBETT DEVELOPING GROWTH FUND INC](https://search.stillhousedata.com/fund/S000006834) | LORD ABBETT DEVELOPING GROWTH FUND, INC. | $21.5M | 96.97% |
| [VANGUARD GROWTH AND INCOME FUND](https://search.stillhousedata.com/fund/S000002913) | VANGUARD QUANTITATIVE FUNDS | $10.1M | 6.13% |
| [Fidelity Contrafund](https://search.stillhousedata.com/fund/S000006037) | Fidelity Contrafund | $8.8M | 0.56% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $8.7M | 18.06% |
| [VANGUARD EXPLORER FUND](https://search.stillhousedata.com/fund/S000002578) | VANGUARD EXPLORER FUND | $5.4M | 2.50% |
| [Fidelity Large Cap Value Enhanced Index Fund](https://search.stillhousedata.com/fund/S000015910) | Fidelity Commonwealth Trust II | $5.3M | 9.39% |
| ROYCE SMALL-CAP TRUST, INC. | ROYCE SMALL-CAP TRUST, INC. | $3.5M | 15.73% |
| [HARTFORD SMALL COMPANY HLS FUND](https://search.stillhousedata.com/fund/S000003220) | HARTFORD SERIES FUND INC | $3.3M | 85.02% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $3.2M | 0.54% |
| [Guardian Small Cap Value Diversified VIP Fund](https://search.stillhousedata.com/fund/S000061838) | Guardian Variable Products Trust | $3.1M | 208.30% |
| [Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF](https://search.stillhousedata.com/fund/S000048296) | Goldman Sachs ETF Trust | $2.9M | 29.51% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/69366J200.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.