Penumbra Ownership | Who Owns Penumbra?

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Penumbra Ownership Summary

Penumbra is owned by 85.28% institutional investors, 2.92% insiders, and 11.79% retail investors. Blackrock funding, inc. /de is the largest institutional shareholder, holding 11.13% of PEN shares. iShares Core S&P Mid-Cap ETF is the top mutual fund, with 3.37% of its assets in Penumbra shares.

PEN Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Penumbra	85.28%	2.92%	11.79%
Sector	Healthcare Stocks	35.74%	11.83%	52.43%
Industry	Medical Device Stocks	36.65%	11.46%	51.88%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock funding, inc. /de	4.33M	11.13%	$1.42B
Blackrock	4.26M	10.99%	$765.80M
Vanguard group	3.77M	9.65%	$1.17B
Hbk investments l p	1.63M	4.20%	$536.64M
State street	1.19M	3.05%	$389.38M
Millennium management	1.10M	2.82%	$360.59M
Baillie gifford	840.43K	2.16%	$275.97M
Geode capital management	795.45K	2.04%	$261.26M
Balyasny asset management	762.10K	1.96%	$250.25M
Goldman sachs group	720.58K	1.85%	$236.62M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Decagon asset management llp	167.59K	14.25%	$55.03M
Ursa fund management	35.00K	10.69%	$11.49M
Slotnik capital	101.00K	9.70%	$33.17M
Birnam oak advisors, lp	95.99K	7.15%	$31.52M
Sand grove capital management llp	86.76K	6.41%	$28.49M
Vazirani asset management	7.50K	5.68%	$2.46M
Hbk investments l p	1.63M	5.45%	$536.64M
Cibra capital	31.60K	5.01%	$10.38M
Psquared asset management	42.78K	4.89%	$14.05M
Water island capital	120.09K	4.40%	$39.44M

Top Buyers

Holder	Shares	% Assets	Change
Hbk investments l p	1.63M	5.45%	1.63M
Balyasny asset management	762.10K	0.32%	600.18K
Citigroup	620.94K	0.09%	573.29K
Whitebox advisors	445.00K	1.80%	445.00K
Exoduspoint capital management, lp	465.21K	1.23%	443.46K

Top Sellers

Holder	Shares	% Assets	Change
Fmr	496.11K	0.01%	-4.64M
Price t rowe associates inc /md/	41.92K	0.00%	-1.60M
Capital research global investors	-	-	-1.13M
Rtw investments, lp	-	-	-866.50K
Citadel advisors	202.72K	0.01%	-787.55K

New Positions

Holder	Shares	% Assets	Change	Value
Hbk investments l p	1.63M	5.45%	1.63M	$536.64M
Whitebox advisors	445.00K	1.80%	445.00K	$146.12M
Aqr arbitrage	423.07K	2.28%	423.07K	$138.92M
Tudor investment corp et al	411.12K	0.25%	411.12K	$135.00M
Hudson bay capital management lp	349.04K	0.40%	349.04K	$114.61M

Sold Out

Holder	Change
Innealta capital	-1.00
Stephens consulting	-1.00
Sjs investment consulting	-1.00
Dinuzzo private wealth	-1.00
Tortoise investment management	-1.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Mar 31, 2026	488	9.42%	33,191,414	-9.80%	85	0.96%	277	37.13%	138	-22.91%
Dec 31, 2025	298	-31.81%	19,780,062	-45.53%	50	0.58%	131	-31.05%	120	-31.82%
Sep 30, 2025	282	-39.74%	25,226,276	-29.55%	64	0.76%	117	-53.94%	120	-15.49%
Jun 30, 2025	466	5.67%	35,458,549	3.11%	91	1.15%	251	5.02%	143	10.85%
Mar 31, 2025	440	15.49%	34,552,725	-1.08%	89	1.09%	237	24.74%	130	-2.99%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Mid-Cap ETF	1.33M	3.37%	-672.00
Vanguard US Total Market Shares ETF	1.16M	3.02%	924.00
Vanguard Total Stock Mkt Idx Inv	1.19M	3.02%	2.79K
Vanguard Small Cap Index	858.90K	2.18%	-1.82K
BlackRock Event Driven Equity Instl	769.79K	1.96%	-
Franklin US Small-Mid Cap Growth Equity	540.46K	1.40%	295.20K
T. Rowe Price Health Sciences	536.11K	1.37%	-1.01K
Vanguard US Growth Investor	502.94K	1.28%	-
Baillie Gifford US Equity Growth	502.94K	1.28%	-
Vanguard Small Cap Growth Index Inv	481.63K	1.22%	-179.00

Recent Insider Transactions

Date	Name	Role	Activity	Value
Apr 02, 2026	Grewal Harpreet	-	Sell	$32.82K
Mar 02, 2026	Yuen Maggie	Chief Financial Officer	Sell	$832.47K
Jan 06, 2026	Grewal Harpreet	-	Sell	$58.15K
Jan 02, 2026	Wilder Thomas	-	Sell	$57.79K
Dec 11, 2025	Bose Arani	-	Sell	$159.69K

Insider Transactions Trends

Date	Buy	Sell
2026 Q2	-	1
2026 Q1	-	3
2025 Q4	-	43
2025 Q3	-	48
2025 Q2	-	104

PEN Ownership FAQ

Who Owns Penumbra?

Penumbra shareholders are primarily institutional investors at 85.28%, followed by 2.92% insiders and 11.80% retail investors. The average institutional ownership in Penumbra's industry, Medical Device Stocks, is 36.65%, which Penumbra exceeds.

Who owns the most shares of Penumbra?

Penumbra’s largest shareholders are Blackrock funding, inc. /de (4.33M shares, 11.13%), Blackrock (4.26M shares, 10.99%), and Vanguard group (3.77M shares, 9.65%). Together, they hold 31.77% of Penumbra’s total shares outstanding.

Does Blackrock own Penumbra?

Yes, BlackRock owns 10.99% of Penumbra, totaling 4.26M shares as of Jun 2024. This represents 0.02% of BlackRock's total assets, with a market value of 765.8M$. In the last quarter, BlackRock increased its holdings by 193.91K shares, a 4.77% change.

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

Decagon asset management llp is Penumbra’s biggest shareholder by percentage of total assets invested, with 14.25% of its assets in 167.59K Penumbra shares, valued at 55.03M$.

Who is the top mutual fund holder of Penumbra shares?

iShares Core S&P Mid-Cap ETF is the top mutual fund holder of Penumbra shares, with 3.37% of its total shares outstanding invested in 1.33M Penumbra shares.

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