PTC Therapeutics Ownership | Who Owns PTC Therapeutics?

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PTC Therapeutics Ownership Summary

PTC Therapeutics is owned by 46.08% institutional investors, 2.59% insiders, and 51.32% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 15.68% of PTCT shares. iShares Core S&P Small-Cap ETF is the top mutual fund, with 5.83% of its assets in PTC Therapeutics shares.

PTCT Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	PTC Therapeutics	46.08%	2.59%	51.32%
Sector	Healthcare Stocks	232.86%	10.65%	-143.51%
Industry	Biotech Stocks	382.13%	10.41%	-292.54%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	12.78M	15.68%	$970.70M
Vanguard group	8.80M	10.80%	$668.69M
Blackrock	7.77M	10.16%	$237.67M
Rtw investments, lp	7.75M	9.91%	$475.40M
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
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
Ikarian capital	280.55K	1.74%	$17.22M
Parkman healthcare partners	202.36K	1.30%	$12.42M
Sector gamma as	61.92K	1.07%	$4.70M

Top Buyers

Holder	Shares	% Assets	Change
Blackrock funding, inc. /de	12.78M	0.02%	5.65M
Point72 asset management	1.22M	0.13%	1.22M
Bnp paribas arbitrage, snc	828.66K	0.03%	808.51K
Toronto dominion bank	3.25M	0.31%	800.57K
Vanguard group	8.80M	0.01%	514.20K

Top Sellers

Holder	Shares	% Assets	Change
Camber capital management lp	-	-	-1.50M
Armistice capital	3.28M	2.98%	-1.46M
Blackstone	-	-	-1.06M
Pacer advisors	-	-	-503.97K
Man group	265.18K	0.03%	-406.33K

New Positions

Holder	Shares	% Assets	Change	Value
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
Boothbay fund management	110.63K	0.10%	110.63K	$6.79M
Woodline partners lp	105.61K	0.03%	105.61K	$6.48M

Sold Out

Holder	Change
Elequin securities	-2.00
Skopos labs	-4.00
Jpl wealth management	-5.00
Bear mountain capital	-8.00
Twin peaks wealth advisors	-9.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
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%
Dec 31, 2024	111	-47.39%	31,159,665	-60.47%	40	0.39%	60	-38.14%	33	-54.79%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Small-Cap ETF	4.82M	5.83%	1.71K
Vanguard Total Stock Mkt Idx Inv	2.63M	3.18%	105.96K
Vanguard US Total Market Shares ETF	2.41M	3.06%	2.85K
Vanguard Small Cap Index	1.91M	2.31%	87.22K
iShares Russell 2000 ETF	1.91M	2.30%	-15.56K
Vanguard Health Care Inv	1.78M	2.15%	-760.38K
State Street® SPDR® S&P® Biotech ETF	1.29M	1.56%	19.43K
SPDR® S&P Biotech ETF	1.19M	1.50%	2.65K
Vanguard Small Cap Growth Index Inv	1.07M	1.29%	57.77K
Janus Henderson Glb Life Scn I2 USD	934.29K	1.13%	153.49K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Apr 21, 2026	Klein Matthew B.	CHIEF EXECUTIVE OFFICER	Sell	$202.09K
Apr 06, 2026	Boulding Mark Elliott	EXEC. VP AND CLO	Sell	$100.65K
Apr 06, 2026	Boulding Mark Elliott	EXEC. VP AND CLO	Sell	$56.64K
Apr 02, 2026	Golden Lee Scott	EVP & CHIEF MEDICAL OFFICER	Sell	$56.36K
Apr 01, 2026	Almstead Neil Gregory	CHIEF TECHNICAL OPS OFFICER	Sell	$870.84K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	7
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 46.08%, followed by 2.59% insiders and 51.33% retail investors. The average institutional ownership in PTC Therapeutics's industry, Biotech Stocks , is 382.13%, which PTC Therapeutics falls below.

Who owns the most shares of PTC Therapeutics?

PTC Therapeutics’s largest shareholders are Blackrock funding, inc. /de (12.78M shares, 15.68%), Vanguard group (8.8M shares, 10.80%), and Blackrock (7.77M shares, 10.16%). Together, they hold 36.64% 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 9.80% of its assets in 862.61K PTC Therapeutics shares, valued at 52.94M$.

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 5.83% of its total shares outstanding invested in 4.82M PTC Therapeutics shares.

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