Ticker · CUSIP 453204109

PI

IMPINJ INC
Technology·Semiconductors
···Share
Holders (tracked)
19
Combined shares
2,283,776
Combined value
$277.00M
Last close
$110.44
Quarter
2025Q4
Tracked holders · last 8 quarters
+8 vs previous quarter over the last 8.
1992024Q12025Q4
Price is -8.9% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

25 events
  1. Paul Tudor Jones (Tudor Investment) opened position2026-02-17
    +42,663 shares · 2025Q4
    13F
  2. Ken Griffin (Citadel Advisors) opened position2026-02-17
    +9,448 shares · 2025Q4
    13F
  3. D.E. Shaw & Co. trimmed2026-02-17
    −7,628 shares · 2025Q4
    13F
  4. AQR Capital Management trimmed2026-02-17
    −3,347 shares · 2025Q4
    13F
  5. Whale Rock Capital trimmed2026-02-17
    −337,313 shares · 2025Q4
    13F
  6. Izzy Englander (Millennium Mgmt) opened position2026-02-17
    +1,377 shares · 2025Q4
    13F
  7. Steve Cohen (Point72) opened position2026-02-17
    +7,300 shares · 2025Q4
    13F
  8. T. Rowe Price added2026-02-17
    +18,263 shares · 2025Q4
    13F
  9. Wellington Management added2026-02-17
    +7,968 shares · 2025Q4
    13F
  10. Ray Dalio (Bridgewater Associates) exited2026-02-13
    −4,339 shares · 2025Q4
    13F
  11. Renaissance Technologies opened position2026-02-12
    +22,800 shares · 2025Q4
    13F
  12. Norges Bank (Norway SWF) opened position2026-02-10
    +317,313 shares · 2025Q4
    13F
  13. Baillie Gifford & Co opened position2026-01-23
    +102,753 shares · 2025Q4
    13F
  14. Two Sigma Investments trimmed2025-11-14
    −2,412 shares · 2025Q3
    13F
  15. D.E. Shaw & Co. added2025-11-14
    +3,784 shares · 2025Q3
    13F
  16. AQR Capital Management trimmed2025-11-14
    −2,134 shares · 2025Q3
    13F
  17. Izzy Englander (Millennium Mgmt) exited2025-11-14
    −81,740 shares · 2025Q3
    13F
  18. Steve Cohen (Point72) exited2025-11-14
    −317,103 shares · 2025Q3
    13F
  19. T. Rowe Price added2025-11-14
    +227,788 shares · 2025Q3
    13F
  20. Wellington Management added2025-11-14
    +70,925 shares · 2025Q3
    13F
  21. Ron Baron (Baron Capital / BAMCO) opened position2025-11-14
    +19 shares · 2025Q3
    13F
  22. Whale Rock Capital added2025-11-14
    +338,487 shares · 2025Q3
    13F
  23. Ray Dalio (Bridgewater Associates) opened position2025-11-13
    +4,339 shares · 2025Q3
    13F
  24. Norges Bank (Norway SWF) exited2025-11-13
    −91,485 shares · 2025Q3
    13F
  25. Norges Bank (Norway SWF) opened position2025-11-12
    +140,970 shares · 2024Q3
    13F

Insider activity

No insider transactions in the last 30 days.
View full insider history for PI →
Follow-the-investor returns
If you'd copied each holder of PI…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
T. Rowe Price2017Q4$0.81+13597.9%$76.5M
Ron Baron (Baron Capital / BAMCO)2016Q4$29.31+276.7%$2K
Steve Cohen (Point72)2021Q4$105.25+4.9%$442K
Steve Cohen (Point72)2021Q4$105.25+4.9%$442K
Izzy Englander (Millennium Mgmt)2017Q1$108.73+1.6%$152K
Whale Rock Capital2025Q1$115.59-4.5%$98.0M
AQR Capital Management2019Q2$117.67-6.1%$503K
Renaissance Technologies2018Q4$130.27-15.2%$2.5M
Two Sigma Investments2017Q3$153.14-27.9%$211K
Ken Griffin (Citadel Advisors)2017Q1$163.96-32.6%$4.7M
Ken Griffin (Citadel Advisors)2017Q1$163.96-32.6%$4.7M
Ken Griffin (Citadel Advisors)2017Q1$163.96-32.6%$4.7M
Norges Bank (Norway SWF)2021Q1$164.49-32.9%$35.0M
D.E. Shaw & Co.2018Q1$165.82-33.4%$1.1M
D.E. Shaw & Co.2018Q1$165.82-33.4%$1.1M
Paul Tudor Jones (Tudor Investment)2019Q1$170.88-35.4%$155K
Paul Tudor Jones (Tudor Investment)2019Q1$170.88-35.4%$155K
Baillie Gifford & Co2025Q4$174.01-36.5%$11.3M
Wellington Management2016Q4$175.26-37.0%$10.3M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions7
Added to2
Trimmed3
Exited1

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
11
$133.2M
2022Q2
8
$113.3M
2022Q3
10
$193K
2022Q4
14
$303.4M
2023Q1
14
$400.3M
2023Q2
13
$222.8M
2023Q3
12
$149.4M
2023Q4
7
$256.4M
2024Q1
9
$354.8M
2024Q2
11
$450.7M
2024Q3
11
$179.7M
2024Q4
15
$181.7M
2025Q1
15
$201.6M
2025Q2
14
$176.6M
2025Q3
11
$256.2M
2025Q4
19
$277.0M
Congress members trading this stock
DateMemberTypeAmount rangeFiling
2025-05-14Marjorie Taylor GreeneBuy$1K – $15KPDF ↗
2025-05-05Marjorie Taylor GreeneBuy$1K – $15KPDF ↗
2025-04-04Marjorie Taylor GreeneBuy$1K – $15KPDF ↗
2025-03-03Marjorie Taylor GreeneBuy$1K – $15KPDF ↗

Who owns PI

19 super-investors · 2025Q4
Tracked stake
2.28M
shares
Combined value
$277M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New11Added2Trim4Held2
#ManagerSharesValue
1Whale Rock Capital887.3K$154M
2Norges Bank
Norway SWF
317.3K$55M
3Baillie Gifford & Co102.8K$18M
4Wellington Management93.4K$16M
5Ken Griffin
Citadel Advisors
45.6K$8M
6Paul Tudor Jones
Tudor Investment
42.7K$7M
7Ken Griffin
Citadel Advisors
42.5K$7M
8Renaissance Technologies22.8K$4M
9D.E. Shaw & Co.9.6K$2M
10Ken Griffin
Citadel Advisors
9.4K$2M
11AQR Capital Management4.6K$793K
12Steve Cohen
Point72
4.0K$696K
13Steve Cohen
Point72
3.3K$574K
14Two Sigma Investments1.9K$333K
15Paul Tudor Jones
Tudor Investment
1.4K$244K
16Izzy Englander
Millennium Mgmt
1.4K$240K
17D.E. Shaw & Co.1.3K$226K
18T. Rowe Price692.6K$121K
19Ron Baron
Baron Capital / BAMCO
19$3K

Recent moves

20 transactions
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