Impinj, Inc.
US ˙ NasdaqGS ˙ US4532041096

SecurityPI / Impinj, Inc.
InstitutionAWM Investment Company, Inc.
Latest Disclosed Ownership207,018 shares
Latest Disclosed Value $ 21,260,749
AWM Investment Company, Inc. reports 16.19% increase in ownership of PI / Impinj, Inc.

On May 15, 2026 - AWM Investment Company, Inc. filed a 13F-HR form disclosing ownership of 207,018 shares of Impinj, Inc. (US:PI) valued at $21,260,749 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 178,173 shares of Impinj, Inc.. This represents a change in shares of 16.19% during the quarter. The current value of the position is $25,034,687 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)
2026-05-15 2026-03-31 13F Impinj COM 453204109 207,018 28,845 16.19 21,261 -31.43 2.3534
2026-02-13 2025-12-31 13F Impinj common 453204109 178,173 0 0.00 31,004 -3.73 2.9939
2025-11-13 2025-09-30 13F Impinj common 453204109 178,173 0 0.00 32,205 62.74 3.0191
2025-08-14 2025-06-30 13F Impinj common 453204109 178,173 -39,998 -18.33 19,790 0.01 2.2192
2025-05-15 2025-03-31 13F Impinj common 453204109 218,171 41,000 23.14 19,788 -23.11 2.7255
2025-02-18 2024-12-31 13F Impinj common 453204109 177,171 -29,829 -14.41 25,736 -42.58 3.1351
2024-11-14 2024-09-30 13F Impinj common 453204109 207,000 -84,552 -29.00 44,820 -1.94 5.4298
2024-08-14 2024-06-30 13F Impinj common 453204109 291,552 -27,700 -8.68 45,707 11.49 6.1745
2024-05-16 2024-03-31 13F Impinj common 453204109 319,252 -18,376 -5.44 40,995 34.87 5.3688
2024-02-14 2023-12-31 13F Impinj common 453204109 337,628 -27,800 -7.61 30,397 51.16 3.9986
2023-11-14 2023-09-30 13F Impinj common 453204109 365,428 31,556 9.45 20,110 -32.82 2.9681
2023-08-11 2023-06-30 13F Impinj common 453204109 333,872 -5,842 -1.72 29,932 -34.99 4.0617
2023-05-12 2023-03-31 13F Impinj common 453204109 339,714 -33,640 -9.01 46,038 12.94 6.2303
2023-02-14 2022-12-31 13F Impinj common 453204109 373,354 -122,433 -24.69 40,763 2.73 5.8776
2022-11-14 2022-09-30 13F Impinj common 453204109 495,787 0 0.00 39,678 36.41 6.0331
2022-08-12 2022-06-30 13F Impinj common 453204109 495,787 58,310 13.33 29,088 4.64 4.5824
2022-05-13 2022-03-31 13F Impinj common 453204109 437,477 0 0.00 27,797 -28.37 3.5788
2022-02-14 2021-12-31 13F Impinj common 453204109 437,477 -55,000 -11.17 38,804 37.92 3.8924
2021-11-15 2021-09-30 13F Impinj common 453204109 492,477 0 0.00 28,135 10.74 2.7609
2021-08-13 2021-06-30 13F Impinj common 453204109 492,477 61,500 14.27 25,407 3.66 2.5075
2021-05-13 2021-03-31 13F Impinj common 453204109 430,977 -20,400 -4.52 24,510 29.69 2.7382
2021-02-12 2020-12-31 13F Impinj common 453204109 451,377 0 0.00 18,899 58.90 2.4014
2020-11-13 2020-09-30 13F Impinj common 453204109 451,377 -100 -0.02 11,894 -4.10 1.9483
2020-08-13 2020-06-30 13F Impinj common 453204109 451,477 -80,900 -15.20 12,402 39.41 2.1736
2020-05-15 2020-03-31 13F Impinj common 453204109 532,377 33,300 6.67 8,896 -31.07 2.3588
2020-02-13 2019-12-31 13F Impinj common 453204109 499,077 0 0.00 12,906 -16.12 2.5216
2019-11-12 2019-09-30 13F Impinj common 453204109 499,077 -14,000 -2.73 15,387 4.79 3.2650
2019-08-08 2019-06-30 13F Impinj common 453204109 513,077 -83,872 -14.05 14,684 46.81 2.8078
2019-05-14 2019-03-31 13F Impinj common 453204109 596,949 0 0.00 10,002 15.15 1.9685
2019-02-13 2018-12-31 13F Impinj common 453204109 596,949 216,666 56.97 8,686 -7.98 1.8904
2018-11-09 2018-09-30 13F Impinj common 453204109 380,283 -140,290 -26.95 9,439 -17.99 1.5604
2018-08-09 2018-06-30 13F Impinj common 453204109 520,573 -4,652 -0.89 11,510 68.32 1.9214
2018-05-10 2018-03-31 13F Impinj common 453204109 525,225 10,001 1.94 6,838 -41.09 1.3185
2018-02-13 2017-12-31 13F Impinj common 453204109 515,224 24,500 4.99 11,608 -43.15 2.2527
2017-11-14 2017-09-30 13F Impinj common 453204109 490,724 3,700 0.76 20,419 -13.82 3.5662
2017-08-30 2017-06-30 13F/A-1 Impinj common 453204109 487,024 -2,500 -0.51 23,694 59.90 4.1897
2017-08-14 2017-06-30 13F Impinj common 453204109 487,024 -2,500 23,694
2017-06-06 2017-03-31 13F/A-1 Impinj common 453204109 489,524 18,901 4.02 14,818 -10.91 2.7697
2017-05-12 2017-03-31 13F Impinj common 453204109 489,524 14,818
2017-02-02 2016-12-31 13F Impinj common 453204109 470,623 250,000 113.32 16,632 101.45 3.2610
2016-11-14 2016-09-30 13F Impinj common 453204109 220,623 220,623 8,256 1.5130
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.