Magnetar Financial LLC ownership in 0P8 / Penumbra, Inc.

Penumbra, Inc.

DE ˙ DB ˙ US70975L1070

275,60 € ↑0,40 (0,15%)

2026-06-04
DEL PRIS

Security	DE:0P8 / Penumbra, Inc.
Institution	Magnetar Financial LLC
Latest Disclosed Ownership	251,433 shares
Latest Disclosed Value	$ 82,563,055

On May 13, 2026 - Magnetar Financial LLC filed a 13F-HR form disclosing ownership of 251,433 shares of Penumbra, Inc. (DE:0P8) valued at $71,080,109 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 0 shares of Penumbra, Inc.. The current value of the position is $69,294,935 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)

File Date	Effective Date	Form	Security	Class	ID	Reported Shares	ΔShares	ΔShares (%)	Reported Value (x1000)	ΔValue (%)	Alloc (%)
2026-05-13	2026-03-31	13F	PENUMBRA	COM	70975L107	251,433	251,433		82,563		0.7561
2026-02-17	2025-12-31	13F	PENUMBRA	COM	70975L107	0	-5,163	-100.00	0	-100.00
2025-11-13	2025-09-30	13F	PENUMBRA	COM	70975L107	5,163	-26,473	-83.68	1,308	-83.90	0.0079
2025-08-12	2025-06-30	13F	PENUMBRA	COM	70975L107	31,636	31,636		8,119		0.0393
2022-11-14	2022-09-30	13F	PENUMBRA	COM	70975L107	0	-41,116	-100.00	0	-100.00
2022-08-15	2022-06-30	13F	PENUMBRA	COM	70975L107	41,116	41,116		5,120		0.0530
2022-05-16	2022-03-31	13F	PENUMBRA	COM	70975L107	0	-2,085	-100.00	0	-100.00
2022-02-14	2021-12-31	13F	PENUMBRA	COM	70975L107	2,085	2,085		599		0.0060
2022-01-14	2021-09-30	13F/A-1	PENUMBRA	COM	70975L107	0	-1,027	-100.00	0	-100.00
2021-11-12	2021-09-30	13F	PENUMBRA	COM	70975L107	0	-1,027		0
2021-08-06	2021-06-30	13F	PENUMBRA	COM	70975L107	1,027	1,027		281		0.0027
2021-02-12	2020-12-31	13F	PENUMBRA	COM	70975L107	0	-3,609	-100.00	0	-100.00
2020-11-16	2020-09-30	13F	PENUMBRA	COM	70975L107	3,609	3,609		702		0.0124
2020-05-15	2020-03-31	13F	PENUMBRA	COM	70975L107	0	-3,287	-100.00	0	-100.00
2020-02-13	2019-12-31	13F	PENUMBRA	COM	70975L107	3,287	1,658	101.78	540	146.58	0.0113
2019-11-14	2019-09-30	13F	PENUMBRA	COM	70975L107	1,629	1,629		219		0.0056

Legend

Shares: The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value: The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price: The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class: This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred

Allocation (%): The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation: The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%): The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis: The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss: This is the market value of the position as of the effective date minus the cost basis.