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PEN Institutional Ownership & 13F Holders | SmartMoneyDB

PENPENUMBRA INC

COM · CUSIP 70975L107

Smart Money Ownership

Of the 17 tracked institutions holding PEN, 9 have a 3-year clone track record — 6 of them beat the S&P. Average holder's clone alpha: +2.3pt. It's a gauge of who owns the name, not just how many.

$376.4M · 0.2% of book

+4.0pt

PRICE T ROWE ASSOCIATES INC /MD/

$13.8M

+2.7pt

PEN (PENUMBRA INC) Institutional Ownership Summary

Among the 17 tracked institutional investors we monitor, PEN (PENUMBRA INC) is held with a combined value of $4.11B across 12,725,400 shares. The largest holder is BlackRock, Inc. with a position worth $1.42B (0.02% of their portfolio). 4 funds opened new positions in the most recent quarter. 5 funds increased their holdings. 8 funds reduced their position.

Total Institutional Value

$4.11B

Total Shares Held

12,725,400

Institutional Holders

% of Shares Outstanding

32.4%

of 39.33M shares · SEC 2026-04-22

Days to Cover

6.3+4.2%

2.12M shares short · FINRA 2026-07-15

Tracked 13F institutions hold 32.4% of PEN's shares outstanding. This is a floor: 13F filings arrive on a ~45-day lag and we track only a subset of institutional filers, so true institutional ownership is higher. Shares-outstanding is the latest SEC cover-page figure (as of 2026-04-22), not a live float.

This Quarter's Biggest Movers

Ranked by estimated dollars moved (share change × implied price). 13F data lags up to 45 days.

Biggest Buyers

MILLENNIUM MANAGEMENT LLC+49% shares~$124.3M Magnetar Financial LLCNew position~$82.6M SOROS FUND MANAGEMENT LLCNew position~$66.8M BlackRock, Inc.+5% shares~$62.5M STATE STREET CORP+3% shares~$9.5M

13F Institutional Holders

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MILLENNIUM MANAGEMENT LLC

Magnetar Financial LLC

0.84% of bookNew

$82.56M

SOROS FUND MANAGEMENT LLC

ADAGE CAPITAL PARTNERS GP, L.L.C.

0.07% of book-10.0%

$44.33M

#	Fund	Value↓	Shares	Portfolio %	Change
1	BlackRock, Inc.	$1.42B	4,330,456	0.02%	+4.6%
2	VANGUARD GROUP INC	$1.17B	3,770,569	0.02%	-1.7%
3	STATE STREET CORP	$389.38M	1,185,811	0.01%	+2.5%
4	MILLENNIUM MANAGEMENT LLC	$376.36M	1,146,136	0.16%	+49.3%
5	BAILLIE GIFFORD & CO	$275.97M	840,427	0.28%	-4.1%
6	FMR LLC	$162.91M	496,107	0.01%	-90.3%
7	Magnetar Financial LLC	$82.56M	251,433	0.84%	New
8	SOROS FUND MANAGEMENT LLC	$66.80M	203,434	0.73%	New
9	CITADEL ADVISORS LLC	$66.57M	202,725	0.05%	-79.5%
10	ADAGE CAPITAL PARTNERS GP, L.L.C.	$44.33M	135,000	0.07%	-10.0%

Congress Trading

1 member · 1 disclosed trade in PEN

Member	Type	Amount	Date
Lisa McClain	Sell	$1,001 - $15,000	Jul 10, 2025

Frequently Asked Questions

Which institutional investors own the most PEN stock?

As of the latest SEC 13F filings, BlackRock, Inc. is the largest institutional holder of PEN with a position worth $1.42B, representing 0.02% of their portfolio. In total, 17 institutional investors hold PEN with a combined value of $4.11B.

Are hedge funds buying or selling PEN?

In the most recent quarter, 4 funds opened a new position in PEN. Additionally, 5 increased their holdings and 8 reduced their positions.

What percentage of PEN is owned by institutional investors?

Institutional investors hold $4.11B worth of PEN stock across 17 positions. The largest institutional holder is BlackRock, Inc. with $1.42B in holdings.

What is a 13F filing and why does it matter for PEN?

A 13F filing is a quarterly report required by the SEC from institutional investment managers with over $100 million in assets. It discloses their holdings in U.S. equities. For PEN, these filings reveal which major funds are accumulating or reducing positions, providing insights into institutional sentiment.

Track PEN institutional moves

Get notified when hedge funds change their PEN positions.