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PTC Therapeutics, Inc. (PTCT) institutional ownership

Latest close $78.45 Jul 23, 2026
Market cap$4.1B 52-week range SectorHealthcare
Funds holding · Q1 2026
350
reported PTCT position changes
Top owners · Q1 2026
No disclosed owners are available.
Institutional activity · Q1 2026
Activity unavailable N/A
195 buyers · 155 sellers

PTC Therapeutics, Inc. (PTCT) price and institutional activity

Dates

Q1 2026

$0 bought by 195 investors
Janus Henderson Group PLCHood River Capital Management LLC +193 more
$0 sold by 155 investors
Point72 Asset Management, L.P.Toronto Dominion Bank +153 more
Bought Sold Totals per quarter; hover a bar for the names.

PTC Therapeutics, Inc. (PTCT) institutional activity · 350

Investor Type Est. change Change Δ Own Date
Janus Henderson Group PLC · Added
Change +2.3M Date Q1 2026
Janus Henderson Group PLC Added· Q1 2026 +2.3M Q1 2026
Point72 Asset Management, L.P. · Exited
Change −1.1M Δ Own −100.0% Date Q1 2026
Point72 Asset Management, L.P. Exited· Q1 2026 −1.1M −100.0% Q1 2026
Toronto Dominion Bank · Reduced
Change −1.1M Date Q1 2026
Toronto Dominion Bank Reduced· Q1 2026 −1.1M Q1 2026
Citadel Advisors LLC Reduced· Q1 2026 −769K −66.6% Q1 2026
Armistice Capital, LLC · Reduced
Change −727K Date Q1 2026
Armistice Capital, LLC Reduced· Q1 2026 −727K Q1 2026
Avoro Capital Advisors LLC · Exited
Change −685K Δ Own −100.0% Date Q1 2026
Avoro Capital Advisors LLC Exited· Q1 2026 −685K −100.0% Q1 2026
Hood River Capital Management LLC · Added
Change +661K Date Q1 2026
Hood River Capital Management LLC Added· Q1 2026 +661K Q1 2026
Qube Research & Technologies Ltd · New
Change +514K Date Q1 2026
Qube Research & Technologies Ltd New· Q1 2026 +514K Q1 2026
Loomis Sayles & Co L P · New
Change +494K Date Q1 2026
Loomis Sayles & Co L P New· Q1 2026 +494K Q1 2026
Balyasny Asset Management L.P. · New
Change +461K Date Q1 2026
Balyasny Asset Management L.P. New· Q1 2026 +461K Q1 2026
Bank of America Corp · Added
Change +455K Date Q1 2026
Bank of America Corp Added· Q1 2026 +455K Q1 2026
Invesco Ltd. · Added
Change +431K Δ Own +99.3% Date Q1 2026
Invesco Ltd. Added· Q1 2026 +431K +99.3% Q1 2026
Mpm Bioimpact LLC · Exited
Change −430K Δ Own −100.0% Date Q1 2026
Mpm Bioimpact LLC Exited· Q1 2026 −430K −100.0% Q1 2026
UBS Group AG · Added
Change +400K Date Q1 2026
UBS Group AG Added· Q1 2026 +400K Q1 2026
Defilade Capital Management, L.P. · New
Change +376K Date Q1 2026
Defilade Capital Management, L.P. New· Q1 2026 +376K Q1 2026
Data through Q1 2026 · filed Jun 9, 2026
15 of 350

Famous investor activity in PTC Therapeutics, Inc. (PTCT)

PTC Therapeutics, Inc. (PTCT) insider trading

Company insiders, action and economics first; trade and filed dates last.
Dates
Insider Title Type Price Qty Value Owned ΔOwn Trade date Filed date
Gravier Pierre · Officer Sell −$281K
Price $80.35 Qty −3K Owned 84K ΔOwn −4.0% Trade date Jul 14, 2026 Filed date Jul 16, 2026
Gravier Pierre Officer Sell $80.35 −3K −$281K 84K −4.0% Jul 14, 2026 Jul 16, 2026
Smith Mary L. · Director 2 operations −$1.4M
Price $90.00 Qty −16K Owned 22K Trade date Jul 9, 2026 Filed date Jul 13, 2026
Smith Mary L. Director 2 operations $90.00 −16K −$1.4M 22K Jul 9, 2026 Jul 13, 2026
Smith Mary L. · Director 4 operations 0
Price $42.95 Owned 0 Trade date Jul 9, 2026 Filed date Jul 13, 2026
Smith Mary L. Director 4 operations $42.95 0 0 Jul 9, 2026 Jul 13, 2026
Almstead Neil Gregory · Officer Sell −$222K
Price $90.25 Qty −2K Owned 60K ΔOwn −3.9% Trade date Jul 9, 2026 Filed date Jul 13, 2026
Almstead Neil Gregory Officer Sell $90.25 −2K −$222K 60K −3.9% Jul 9, 2026 Jul 13, 2026
Almstead Neil Gregory · Officer 2 operations 0
Price $46.54 Owned 45K Trade date Jul 9, 2026 Filed date Jul 13, 2026
Almstead Neil Gregory Officer 2 operations $46.54 0 45K Jul 9, 2026 Jul 13, 2026
Almstead Neil Gregory · Officer 3 operations −$2.2M
Price $87.17–$89.44 Qty −25K Owned 60K ΔOwn −29.0% Trade date Jul 7, 2026 Filed date Jul 8, 2026
Almstead Neil Gregory Officer 3 operations $87.17–$89.44 −25K −$2.2M 60K −29.0% Jul 7, 2026 Jul 8, 2026
Almstead Neil Gregory · Officer 2 operations 0
Price $39.42 Owned 9K Trade date Jul 7, 2026 Filed date Jul 8, 2026
Almstead Neil Gregory Officer 2 operations $39.42 0 9K Jul 7, 2026 Jul 8, 2026
Boulding Mark Elliott · Officer 8 operations −$432K
Price $83.10–$86.38 Qty −5K Owned 105K Trade date Jul 6, 2026 Filed date Jul 8, 2026
Boulding Mark Elliott Officer 8 operations $83.10–$86.38 −5K −$432K 105K Jul 6, 2026 Jul 8, 2026
Boulding Mark Elliott · Officer 4 operations 40
Price $39.42–$46.54 Owned 28K Trade date Jul 6, 2026 Filed date Jul 8, 2026
Boulding Mark Elliott Officer 4 operations $39.42–$46.54 40 28K Jul 6, 2026 Jul 8, 2026
Almstead Neil Gregory · Officer 5 operations −$1.9M
Price $85.28–$87.03 Qty −22K Owned 60K Trade date Jul 6, 2026 Filed date Jul 8, 2026
Almstead Neil Gregory Officer 5 operations $85.28–$87.03 −22K −$1.9M 60K Jul 6, 2026 Jul 8, 2026
Almstead Neil Gregory · Officer 6 operations 0
Price $38.10–$39.42 Owned 34K Trade date Jul 6, 2026 Filed date Jul 8, 2026
Almstead Neil Gregory Officer 6 operations $38.10–$39.42 0 34K Jul 6, 2026 Jul 8, 2026
Almstead Neil Gregory · Officer 2 operations −$693K
Price $85.23–$85.26 Qty −8K Owned 60K Trade date Jun 26, 2026 Filed date Jun 30, 2026
Almstead Neil Gregory Officer 2 operations $85.23–$85.26 −8K −$693K 60K Jun 26, 2026 Jun 30, 2026
Almstead Neil Gregory · Officer 4 operations 0
Price $38.10 Owned 20K Trade date Jun 26, 2026 Filed date Jun 30, 2026
Almstead Neil Gregory Officer 4 operations $38.10 0 20K Jun 26, 2026 Jun 30, 2026
Almstead Neil Gregory · Officer 5 operations −$1.8M
Price $85.24–$87.00 Qty −21K Owned 60K Trade date Jun 25, 2026 Filed date Jun 26, 2026
Almstead Neil Gregory Officer 5 operations $85.24–$87.00 −21K −$1.8M 60K Jun 25, 2026 Jun 26, 2026
Almstead Neil Gregory · Officer 6 operations 0
Price $38.10–$39.42 Owned 36K Trade date Jun 25, 2026 Filed date Jun 26, 2026
Almstead Neil Gregory Officer 6 operations $38.10–$39.42 0 36K Jun 25, 2026 Jun 26, 2026
15 of 89
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PTC Therapeutics, Inc. (PTCT) activist and large shareholders

Dates
Owner/Filer identity Shares reported % of shares outstanding Filing date
Vanguard Group Inc 8.8M
% of shares outstanding 11.7% Filing date Feb 13, 2024
Vanguard Group Inc 8.8M 11.7% Feb 13, 2024
Wellington Management Group LLP 7.9M
% of shares outstanding 10.3% Filing date Nov 8, 2024
Wellington Management Group LLP 7.9M 10.3% Nov 8, 2024
BlackRock Inc. 7.7M
% of shares outstanding 10.2% Filing date Jan 8, 2024
BlackRock Inc. 7.7M 10.2% Jan 8, 2024
Rtw Investments, LP 7.4M
% of shares outstanding 9.8% Filing date Feb 14, 2024
Rtw Investments, LP 7.4M 9.8% Feb 14, 2024
Armistice Capital, LLC
% of shares outstanding 9.4% Filing date Nov 14, 2024
Armistice Capital, LLC 9.4% Nov 14, 2024
Janus Henderson Group PLC 7.2M
% of shares outstanding 8.7% Filing date May 15, 2026
Janus Henderson Group PLC 7.2M 8.7% May 15, 2026
Vanguard Portfolio Management 4.9M
% of shares outstanding 5.9% Filing date Apr 29, 2026
Vanguard Portfolio Management 4.9M 5.9% Apr 29, 2026
Camber Capital Management LP 4.0M
% of shares outstanding 5.3% Filing date Oct 30, 2023
Camber Capital Management LP 4.0M 5.3% Oct 30, 2023
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PTC Therapeutics, Inc. (PTCT) ownership FAQ

Who owns PTCT?

350 reporting institutions disclosed PTCT position changes in the Q1 2026 snapshot.

How is institutional activity calculated?

For each manager, WhoBought compares accepted consecutive 13F share counts. Share change is current shares minus prior shares. Estimated dollar change is that signed share change multiplied by the split-adjusted quarter-mean close. The activity table on this page uses Q1 2026.

What are activist and large shareholder filings?

An investor crossing 5% of a share class generally files Schedule 13D for activist intent or Schedule 13G for a passive position. The technical form names appear here rather than in the activity rows.

Where does this data come from?

Ownership and institutional activity come from SEC Form 13F filings. Insider activity comes from SEC Form 4, and large-shareholder activity from SEC Schedules 13D and 13G. FMP supplies price data only. Company logos use the local verified Parqet cache with one shared fallback.

Why are ownership reports delayed?

Form 13F is a quarterly disclosure and is normally filed after the quarter ends. Every ownership and activity value therefore names its represented period; it is not presented as a live position.

How are missing table values shown?

A muted dash marks a missing table value. It means the filing omitted the value, comparable data is unavailable, or no prior position exists for comparison.