Penumbra, Inc.
US ˙ NYSE ˙ US70975L1070

SecurityPEN / Penumbra, Inc.
InstitutionNorthern Trust Corp
Latest Disclosed Ownership320,853 shares
Latest Disclosed Value $ 105,358,499
Northern Trust Corp reports 3.28% increase in ownership of PEN / Penumbra, Inc.

On May 14, 2026 - Northern Trust Corp filed a 13F-HR form disclosing ownership of 320,853 shares of Penumbra, Inc. (US:PEN) valued at $105,358,500 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 310,659 shares of Penumbra, Inc.. This represents a change in shares of 3.28% during the quarter. The current value of the position is $102,884,723 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 Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-14 2026-03-31 13F PENUMBRA COM 70975L107 320,853 10,194 3.28 105,358 9.08 0.0029
2026-02-17 2025-12-31 13F PENUMBRA COM 70975L107 310,659 -8,454 -2.65 96,587 19.48 0.0025
2025-11-14 2025-09-30 13F PENUMBRA COM 70975L107 319,113 791 0.25 80,838 -1.04 0.0103
2025-08-13 2025-06-30 13F PENUMBRA COM 70975L107 318,322 2,300 0.73 81,691 -3.33 0.0112
2025-05-13 2025-03-31 13F PENUMBRA COM 70975L107 316,022 -2,208 -0.69 84,507 11.82 0.0125
2025-02-14 2024-12-31 13F PENUMBRA COM 70975L107 318,230 54,890 20.84 75,573 47.69 0.0107
2024-11-13 2024-09-30 13F PENUMBRA COM 70975L107 263,340 -6,557 -2.43 51,170 5.34 0.0084
2024-08-14 2024-06-30 13F PENUMBRA COM 70975L107 269,897 32,310 13.60 48,573 -8.39 0.0082
2024-05-14 2024-03-31 13F PENUMBRA COM 70975L107 237,587 -34,348 -12.63 53,025 -22.48 0.0092
2024-02-13 2023-12-31 13F PENUMBRA COM 70975L107 271,935 3,279 1.22 68,403 5.25 0.0124
2023-11-13 2023-09-30 13F PENUMBRA COM 70975L107 268,656 -3,923 -1.44 64,991 -30.70 0.0126
2023-08-11 2023-06-30 13F PENUMBRA COM 70975L107 272,579 -3,134 -1.14 93,784 22.05 0.0180
2023-05-15 2023-03-31 13F PENUMBRA COM 70975L107 275,713 3,071 1.13 76,838 26.69 0.0152
2023-02-13 2022-12-31 13F PENUMBRA COM 70975L107 272,642 903 0.33 60,652 17.72 0.0127
2022-11-14 2022-09-30 13F PENUMBRA COM 70975L107 271,739 10,281 3.93 51,521 58.25 0.0118
2022-08-12 2022-06-30 13F PENUMBRA COM 70975L107 261,458 -5,851 -2.19 32,557 -45.17 0.0070
2022-05-13 2022-03-31 13F PENUMBRA COM 70975L107 267,309 -6,377 -2.33 59,377 -24.49 0.0104
2022-02-08 2021-12-31 13F PENUMBRA COM 70975L107 273,686 1,636 0.60 78,636 8.46 0.0129
2021-11-15 2021-09-30 13F PENUMBRA COM 70975L107 272,050 -7,204 -2.58 72,502 -5.27 0.0128
2021-08-13 2021-06-30 13F PENUMBRA COM 70975L107 279,254 -7,700 -2.68 76,532 -1.43 0.0135
2021-05-12 2021-03-31 13F PENUMBRA COM 70975L107 286,954 20,782 7.81 77,644 66.69 0.0144
2021-02-11 2020-12-31 13F PENUMBRA COM 70975L107 266,172 -2,134 -0.80 46,580 -10.69 0.0091
2020-11-16 2020-09-30 13F PENUMBRA COM 70975L107 268,306 -6,164 -2.25 52,153 6.26 0.0114
2020-08-14 2020-06-30 13F PENUMBRA COM 70975L107 274,470 -3,195 -1.15 49,080 9.56 0.0116
2020-05-14 2020-03-31 13F PENUMBRA COM 70975L107 277,665 8,681 3.23 44,796 1.38 0.0129
2020-02-14 2019-12-31 13F PENUMBRA COM 70975L107 268,984 5,301 2.01 44,188 24.60 0.0099
2019-11-13 2019-09-30 13F PENUMBRA COM 70975L107 263,683 86,981 49.22 35,463 25.43 0.0085
2019-08-13 2019-06-30 13F PENUMBRA COM 70975L107 176,702 -540 -0.30 28,273 8.51 0.0067
2019-05-13 2019-03-31 13F PENUMBRA COM 70975L107 177,242 2,020 1.15 26,056 21.68 0.0064
2019-02-12 2018-12-31 13F PENUMBRA COM 70975L107 175,222 953 0.55 21,413 -17.92 0.0060
2018-11-14 2018-09-30 13F PENUMBRA COM 70975L107 174,269 -1,023 -0.58 26,087 7.72 0.0064
2018-09-18 2018-06-30 13F/A-1 PENUMBRA COM 70975L107 175,292 -192,161 -52.30 24,217 -43.01 0.0061
2018-08-14 2018-06-30 13F PENUMBRA COM 70975L107 177,474 -189,979 24,519
2018-05-09 2018-03-31 13F PENUMBRA COM 70975L107 367,453 -619 -0.17 42,496 22.69 0.0111
2018-02-14 2017-12-31 13F PENUMBRA COM 70975L107 368,072 -6,718 -1.79 34,636 2.34 0.0088
2017-11-13 2017-09-30 13F PENUMBRA COM 70975L107 374,790 778 0.21 33,844 3.12 0.0088
2017-08-11 2017-06-30 13F PENUMBRA COM 70975L107 374,012 56,578 17.82 32,820 23.90 0.0092
2017-05-12 2017-03-31 13F PENUMBRA COM 70975L107 317,434 18,969 6.36 26,490 39.11 0.0076
2017-02-13 2016-12-31 13F PENUMBRA COM 70975L107 298,465 3,093 1.05 19,042 -15.17 0.0058
2016-11-09 2016-09-30 13F PENUMBRA COM 70975L107 295,372 199,408 207.79 22,446 293.03 0.0070
2016-08-12 2016-06-30 13F PENUMBRA COM 70975L107 95,964 49,497 106.52 5,711 167.12 0.0019
2016-08-19 2016-03-31 13F/A-1 PENUMBRA COM 70975L107 46,467 285 0.62 2,138 -13.96 0.0007
2016-05-13 2016-03-31 13F PENUMBRA COM 70975L107 46,467 2,138
2016-02-12 2015-12-31 13F PENUMBRA COM 70975L107 46,182 46,182 2,485 0.0008
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.