PTC Therapeutics Ownership | Who Owns PTC Therapeutics?

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PTC Therapeutics Ownership Summary

PTC Therapeutics is owned by 32.00% institutional investors, 2.43% insiders, and 65.57% retail investors. Vanguard group is the largest institutional shareholder, holding 10.61% of PTCT shares. Vanguard Health Care Inv is the top mutual fund, with 3.20% of its assets in PTC Therapeutics shares.

PTCT Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	PTC Therapeutics	32.00%	2.43%	65.57%
Sector	Healthcare Stocks	42.54%	10.83%	46.63%
Industry	Biotech Stocks	45.22%	10.75%	44.04%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	8.29M	10.61%	$508.70M
Blackrock	7.77M	10.16%	$237.67M
Rtw investments, lp	7.75M	9.91%	$475.40M
Blackrock funding, inc. /de	7.13M	9.12%	$437.62M
Wellington management group llp	4.92M	6.29%	$301.86M
Cowen and company	3.76M	4.91%	$114.87M
Armistice capital	3.28M	4.19%	$201.13M
Toronto dominion bank	3.25M	4.15%	$199.24M
State street	3.13M	4.01%	$192.38M
Janus henderson group	2.33M	3.02%	$105.02M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Brummer multi-strategy ab	19.14K	21.40%	$1.17M
Palo alto investors lp	862.61K	9.80%	$52.94M
Rtw investments, lp	7.75M	5.86%	$475.40M
Bioimpact capital	438.48K	4.41%	$26.91M
Boxer capital management	200.00K	3.91%	$12.27M
Tang capital management	1.50M	3.54%	$92.06M
Cowen and company	3.76M	3.16%	$114.87M
Armistice capital	3.28M	2.98%	$201.13M
Sector gamma as	118.11K	1.80%	$7.25M
Ikarian capital	280.55K	1.74%	$17.22M

Top Buyers

Holder	Shares	% Assets	Change
Jefferies financial group	1.58M	0.46%	1.58M
Point72 asset management	1.22M	0.13%	1.22M
Toronto dominion bank	3.25M	0.31%	800.57K
Palo alto investors lp	862.61K	9.80%	456.14K
Janus henderson group	2.33M	0.05%	455.70K

Top Sellers

Holder	Shares	% Assets	Change
Camber capital management lp	-	-	-1.50M
Armistice capital	3.28M	2.98%	-1.46M
Blackstone	-	-	-1.06M
Morgan stanley	419.42K	0.00%	-743.92K
Vanguard group	8.29M	0.01%	-558.47K

New Positions

Holder	Shares	% Assets	Change	Value
Jefferies financial group	1.58M	0.46%	1.58M	$97.25B
Boston partners	361.66K	0.02%	361.66K	$22.20M
Ikarian capital	280.55K	1.74%	280.55K	$17.22M
Boxer capital management	200.00K	3.91%	200.00K	$12.27M
Wcm investment management	147.06K	0.02%	147.06K	$8.92M

Sold Out

Holder	Change
Elequin securities	-2.00
Skopos labs	-4.00
Twin peaks wealth advisors	-9.00
Global financial private client	-10.00
Riggs asset managment	-11.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Sep 30, 2025	151	-46.83%	25,008,417	-66.16%	32	0.36%	72	-55.00%	56	-30.00%
Jun 30, 2025	291	8.18%	79,867,386	1.38%	102	1.00%	164	19.71%	82	-11.83%
Mar 31, 2025	15	-93.90%	11,112,579	-85.70%	14	0.14%	11	-91.91%	2	-97.33%
Dec 31, 2024	111	-47.39%	31,159,665	-60.47%	40	0.39%	60	-38.14%	33	-54.79%
Sep 30, 2024	211	3.43%	78,815,809	-1.28%	102	0.94%	97	-21.77%	73	19.67%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
Vanguard Health Care Inv	2.54M	3.20%	-761.81K
Vanguard Total Stock Mkt Idx Inv	2.50M	3.15%	-52.74K
Vanguard US Total Market Shares ETF	2.41M	3.06%	2.85K
Vanguard Small Cap Index	1.93M	2.43%	-11.93K
iShares Russell 2000 ETF	1.88M	2.36%	-
SPDR® S&P Biotech ETF	1.19M	1.50%	2.65K
Vanguard Small Cap Growth Index Inv	1.09M	1.37%	-625.00
Vanguard Institutional Extnd Mkt Idx Tr	851.80K	1.07%	-369.21K
Hartford MidCap Y	808.97K	1.05%	-805.13K
Fidelity Small Cap Index	779.13K	0.98%	7.44K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Dec 03, 2025	Reeve Emma	-	Sell	$57.63K
Dec 02, 2025	Klein Matthew B.	CHIEF EXECUTIVE OFFICER	Sell	$271.05K
Nov 25, 2025	Almstead Neil Gregory	CHIEF TECHNICAL OPS OFFICER	Sell	$309.29K
Nov 25, 2025	Almstead Neil Gregory	CHIEF TECHNICAL OPS OFFICER	Sell	$1.12M
Nov 25, 2025	Almstead Neil Gregory	CHIEF TECHNICAL OPS OFFICER	Sell	$1.82M

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	71
2025 Q3	-	17
2025 Q2	-	4
2025 Q1	-	45
2024 Q4	-	23

PTCT Ownership FAQ

Who Owns PTC Therapeutics?

PTC Therapeutics shareholders are primarily institutional investors at 32.00%, followed by 2.43% insiders and 65.57% retail investors. The average institutional ownership in PTC Therapeutics's industry, Biotech Stocks , is 45.22%, which PTC Therapeutics falls below.

Who owns the most shares of PTC Therapeutics?

PTC Therapeutics’s largest shareholders are Vanguard group (8.29M shares, 10.61%), Blackrock (7.77M shares, 10.16%), and Rtw investments, lp (7.75M shares, 9.91%). Together, they hold 30.68% of PTC Therapeutics’s total shares outstanding.

Does Blackrock own PTC Therapeutics?

Yes, BlackRock owns 10.16% of PTC Therapeutics, totaling 7.77M shares as of Jun 2024. This represents 0.01% of BlackRock's total assets, with a market value of 237.67M$. In the last quarter, BlackRock increased its holdings by 207.05K shares, a 2.74% change.

Who is PTC Therapeutics’s biggest shareholder by percentage of total assets invested?

Brummer multi-strategy ab is PTC Therapeutics’s biggest shareholder by percentage of total assets invested, with 21.40% of its assets in 19.14K PTC Therapeutics shares, valued at 1.17M$.

Who is the top mutual fund holder of PTC Therapeutics shares?

Vanguard Health Care Inv is the top mutual fund holder of PTC Therapeutics shares, with 3.20% of its total shares outstanding invested in 2.54M PTC Therapeutics shares.

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