PTC Therapeutics Ownership | Who Owns PTC Therapeutics?

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PTC Therapeutics Ownership Summary

PTC Therapeutics is owned by 102.20% institutional investors, 2.47% insiders. Vanguard group is the largest institutional shareholder, holding 11.93% 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	102.20%	2.47%	-4.67%
Sector	Healthcare Stocks	488.30%	11.08%	-399.38%
Industry	Biotech Stocks	307.10%	11.11%	-218.21%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Vanguard group	9.18M	11.93%	$414.33M
Blackrock	7.77M	10.16%	$237.67M
Rtw investments, lp	7.75M	9.91%	$378.33M
Blackrock funding, inc. /de	7.48M	9.57%	$365.34M
Wellington management group llp	4.79M	6.22%	$216.09M
Armistice capital	4.74M	6.06%	$231.28M
Cowen and company	3.76M	4.91%	$114.87M
State street	2.75M	3.59%	$84.07M
Toronto dominion bank	2.45M	3.13%	$119.46M
Janus henderson group	2.33M	3.02%	$105.02M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Rtw investments, lp	7.75M	5.39%	$378.33M
Palo alto investors lp	406.47K	4.22%	$19.85M
Armistice capital	4.74M	3.99%	$231.28M
Bioimpact capital	438.48K	3.71%	$21.42M
Cowen and company	3.76M	3.16%	$114.87M
Tang capital management	1.10M	2.72%	$53.72M
Sector gamma as	92.25K	1.47%	$4.51M
Sofinnova investments	375.94K	1.12%	$18.36M
Parkman healthcare partners	181.64K	1.02%	$8.87M
Hussman strategic advisors	63.00K	0.70%	$3.08M

Top Buyers

Holder	Shares	% Assets	Change
Ubs group	1.07M	0.01%	905.98K
Hood river capital management	636.50K	0.43%	552.13K
Janus henderson group	2.33M	0.05%	455.70K
Lord, abbett	384.45K	0.06%	384.45K
Nuveen asset management	1.08M	0.01%	273.64K

Top Sellers

Holder	Shares	% Assets	Change
Wellington management group llp	4.79M	0.04%	-3.11M
Camber capital management lp	-	-	-1.50M
Point72 asset management	-	-	-1.37M
State street	2.75M	0.00%	-1.36M
Blackstone	-	-	-1.06M

New Positions

Holder	Shares	% Assets	Change	Value
Lord, abbett	384.45K	0.06%	384.45K	$18.78M
Dz bank ag deutsche zentral genossenschafts bank, frankfurt am main	207.89K	0.01%	207.89K	$10.15M
Dimensional fund advisors lp	105.05K	0.00%	105.05K	$4.74M
Royce & associates lp	50.24K	0.03%	50.24K	$2.45M
Federated hermes	47.83K	0.00%	47.83K	$2.16M

Sold Out

Holder	Change
Elequin securities	-2.00
Global financial private client	-10.00
Nelson, van denburg & campbell wealth management group	-14.00
Ronald blue trust	-17.00
Stephens consulting	-20.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Jun 30, 2024	204	6.81%	79,836,937	-6.22%	104	0.84%	124	45.88%	61	-11.59%

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
Oct 07, 2025	Boulding Mark Elliott	EXEC. VP AND CLO	Sell	$20.27K
Oct 07, 2025	Boulding Mark Elliott	EXEC. VP AND CLO	Sell	$83.32K
Oct 07, 2025	Boulding Mark Elliott	EXEC. VP AND CLO	Sell	$110.50K
Oct 03, 2025	Reeve Emma	-	Sell	$177.52K
Oct 03, 2025	Reeve Emma	-	Sell	$140.64K

Insider Transactions Trends

Date	Buy	Sell
2025 Q4	-	30
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 102.20%, followed by 2.47% insiders and -4.67% retail investors. The average institutional ownership in PTC Therapeutics's industry, Biotech Stocks , is 307.10%, which PTC Therapeutics falls below.

Who owns the most shares of PTC Therapeutics?

PTC Therapeutics’s largest shareholders are Vanguard group (9.18M shares, 11.93%), Blackrock (7.77M shares, 10.16%), and Rtw investments, lp (7.75M shares, 9.91%). Together, they hold 32.00% 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?

Rtw investments, lp is PTC Therapeutics’s biggest shareholder by percentage of total assets invested, with 5.39% of its assets in 7.75M PTC Therapeutics shares, valued at 378.33M$.

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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