PTC Therapeutics Ownership | Who Owns PTC Therapeutics?

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PTC Therapeutics Ownership Summary

PTC Therapeutics is owned by 115.89% institutional investors, 7.38% insiders. Blackrock funding, inc. /de is the largest institutional shareholder, holding 16.05% of PTCT shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.90% of its assets in PTC Therapeutics shares.

PTCT Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	PTC Therapeutics	115.89%	7.38%	-23.27%
Sector	Healthcare Stocks	35.58%	11.87%	52.55%
Industry	Biotech Stocks	35.75%	11.83%	52.41%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	12.95M	16.05%	$882.20M
Vanguard group	8.80M	10.80%	$668.69M
Blackrock	7.77M	10.16%	$237.67M
Rtw investments, lp	7.75M	9.60%	$527.76M
Janus henderson group	7.19M	8.91%	$490.00M
State street	4.35M	5.39%	$296.13M
Cowen and company	3.76M	4.91%	$114.87M
Wellington management group llp	3.94M	4.89%	$268.61M
Toronto dominion bank	3.03M	3.75%	$206.16M
Geode capital management	2.21M	2.74%	$150.59M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Palo alto investors lp	921.61K	9.60%	$62.79M
Rtw investments, lp	7.75M	5.25%	$527.76M
Tang capital management	1.50M	5.19%	$102.19M
Cowen and company	3.76M	3.16%	$114.87M
Parkman healthcare partners	431.36K	3.03%	$29.39M
Armistice capital	2.07M	2.51%	$141.33M
Arrowpoint investment partners (singapore) pte.	39.70K	2.40%	$2.70M
Boxer capital management	200.00K	1.79%	$13.63M
Sector gamma as	75.00K	1.21%	$5.11M
Hood river capital management	1.66M	1.14%	$113.41M

Top Buyers

Holder	Shares	% Assets	Change
Janus henderson group	7.19M	0.24%	2.34M
Hood river capital management	1.66M	1.14%	661.48K
Vanguard fiduciary trust	553.66K	0.01%	553.66K
Vanguard group	8.80M	0.01%	514.20K
Qube research	513.82K	0.04%	513.82K

Top Sellers

Holder	Shares	% Assets	Change
Camber capital management lp	-	-	-1.50M
Point72 asset management	-	-	-1.13M
Toronto dominion bank	3.03M	0.30%	-1.11M
Citadel advisors	385.20K	0.00%	-769.26K
Armistice capital	2.07M	2.51%	-727.42K

New Positions

Holder	Shares	% Assets	Change	Value
Vanguard fiduciary trust	553.66K	0.01%	553.66K	$37.72M
Loomis sayles & co l p	493.60K	0.05%	493.60K	$33.63M
Capital fund management	121.29K	0.04%	121.29K	$8.26M
Cinctive capital management lp	95.31K	0.28%	95.31K	$5.85M
Vanguard asset management	65.20K	0.00%	65.20K	$4.44M

Sold Out

Holder	Change
Signature resources capital management	-2.00
Cedar mountain advisors	-2.00
Annis gardner whiting capital advisors	-4.00
Skopos labs	-4.00
Bear mountain capital	-8.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	352	-2.49%	93,508,088	0.87%	115	0.90%	204	-8.52%	99	2.06%
Dec 31, 2025	193	-37.34%	37,555,520	-54.62%	46	0.41%	123	-24.07%	48	-52.00%
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%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	4.89M	5.90%	1.04K
Vanguard Total Stock Mkt Idx Inv	2.64M	3.19%	6.60K
Vanguard US Total Market Shares ETF	2.41M	3.06%	2.85K
Vanguard Health Care Inv	2.04M	2.46%	259.91K
Vanguard Small Cap Index	1.91M	2.30%	-4.03K
iShares Russell 2000 ETF	1.85M	2.23%	15.60K
State Street® SPDR® S&P® Biotech ETF	1.44M	1.73%	-14.22K
SPDR® S&P Biotech ETF	1.19M	1.50%	2.65K
Vanguard Small Cap Growth Index Inv	1.07M	1.29%	-593.00
Janus Henderson Global Life Sciences D	1.02M	1.23%	152.41K

Recent Insider Transactions

Date	Name	Role	Activity	Value
May 15, 2026	Boulding Mark Elliott	EXEC. VP AND CLO	Sell	$33.14K
May 15, 2026	Boulding Mark Elliott	EXEC. VP AND CLO	Sell	$169.82K
May 14, 2026	Klein Matthew B.	CHIEF EXECUTIVE OFFICER	Sell	$186.37K
May 14, 2026	Klein Matthew B.	CHIEF EXECUTIVE OFFICER	Sell	$527.71K
May 14, 2026	Klein Matthew B.	CHIEF EXECUTIVE OFFICER	Sell	$49.61K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	15
2026 Q1	-	61
2025 Q4	-	89
2025 Q3	-	17
2025 Q2	-	4

PTCT Ownership FAQ

Who Owns PTC Therapeutics?

PTC Therapeutics shareholders are primarily institutional investors at 115.89%, followed by 7.38% insiders and -23.27% retail investors. The average institutional ownership in PTC Therapeutics's industry, Biotech Stocks , is 35.75%, which PTC Therapeutics exceeds.

Who owns the most shares of PTC Therapeutics?

PTC Therapeutics’s largest shareholders are Blackrock funding, inc. /de (12.95M shares, 16.05%), Vanguard group (8.8M shares, 10.80%), and Blackrock (7.77M shares, 10.16%). Together, they hold 37.01% 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?

Palo alto investors lp is PTC Therapeutics’s biggest shareholder by percentage of total assets invested, with 9.60% of its assets in 921.61K PTC Therapeutics shares, valued at 62.79M$.

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

iShares Core S&P Small-Cap ETF is the top mutual fund holder of PTC Therapeutics shares, with 5.90% of its total shares outstanding invested in 4.89M PTC Therapeutics shares.

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