Ticker · CUSIP 70975L107

PEN

PENUMBRA INC
Healthcare·Medical Devices
···Share
Holders (tracked)
15
Combined shares
4,837,853
Combined value
$993.48M
Last close
$331.47
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 8.
15152024Q12025Q4
Price is +61.4% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

24 events
  1. Ken Griffin (Citadel Advisors) added2026-02-17
    +19,277 shares · 2025Q4
    13F
  2. D.E. Shaw & Co. trimmed2026-02-17
    −62 shares · 2025Q4
    13F
  3. Wellington Management opened position2026-02-17
    +113,582 shares · 2025Q4
    13F
  4. AQR Capital Management trimmed2026-02-17
    −49,514 shares · 2025Q4
    13F
  5. Two Sigma Investments added2026-02-17
    +5,980 shares · 2025Q4
    13F
  6. Ron Baron (Baron Capital / BAMCO) added2026-02-17
    +426 shares · 2025Q4
    13F
  7. Izzy Englander (Millennium Mgmt) added2026-02-17
    +444,526 shares · 2025Q4
    13F
  8. Steve Cohen (Point72) opened position2026-02-17
    +80,832 shares · 2025Q4
    13F
  9. T. Rowe Price trimmed2026-02-17
    −150,173 shares · 2025Q4
    13F
  10. Ray Dalio (Bridgewater Associates) trimmed2026-02-13
    −89 shares · 2025Q4
    13F
  11. Norges Bank (Norway SWF) opened position2026-02-10
    +106,271 shares · 2025Q4
    13F
  12. Baillie Gifford & Co trimmed2026-01-23
    −32,221 shares · 2025Q4
    13F
  13. Paul Tudor Jones (Tudor Investment) exited2025-12-09
    −58,189 shares · 2025Q3
    13F
  14. AQR Capital Management trimmed2025-11-14
    −96,535 shares · 2025Q3
    13F
  15. Izzy Englander (Millennium Mgmt) added2025-11-14
    +165,097 shares · 2025Q3
    13F
  16. Steve Cohen (Point72) exited2025-11-14
    −140,045 shares · 2025Q3
    13F
  17. Two Sigma Investments trimmed2025-11-14
    −15,520 shares · 2025Q3
    13F
  18. T. Rowe Price added2025-11-14
    +420,266 shares · 2025Q3
    13F
  19. Ron Baron (Baron Capital / BAMCO) trimmed2025-11-14
    −4,000 shares · 2025Q3
    13F
  20. Renaissance Technologies exited2025-11-13
    −13,100 shares · 2025Q3
    13F
  21. Norges Bank (Norway SWF) exited2025-11-13
    −444,272 shares · 2025Q3
    13F
  22. Ray Dalio (Bridgewater Associates) trimmed2025-11-13
    −2,034 shares · 2025Q3
    13F
  23. Norges Bank (Norway SWF) trimmed2025-11-12
    −97,194 shares · 2024Q3
    13F
  24. Baillie Gifford & Co trimmed2025-10-31
    −13,581 shares · 2025Q3
    13F

Insider activity

No insider transactions in the last 30 days.
View full insider history for PEN →
Follow-the-investor returns
If you'd copied each holder of PEN…
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 Price2016Q3$26.08+1171.0%$545.0M
Baillie Gifford & Co2017Q3$191.45+73.1%$290.5M
AQR Capital Management2016Q3$229.88+44.2%$61.3M
Ray Dalio (Bridgewater Associates)2020Q3$246.61+34.4%$395K
D.E. Shaw & Co.2016Q2$256.80+29.1%$2.5M
Two Sigma Investments2016Q1$262.67+26.2%$8.2M
Ron Baron (Baron Capital / BAMCO)2025Q1$264.26+25.4%$4.6M
Steve Cohen (Point72)2016Q3$305.23+8.6%$26.8M
Izzy Englander (Millennium Mgmt)2016Q3$306.02+8.3%$224.7M
Izzy Englander (Millennium Mgmt)2016Q3$306.02+8.3%$224.7M
Wellington Management2016Q3$306.94+8.0%$37.6M
Ken Griffin (Citadel Advisors)2016Q1$310.64+6.7%$7.1M
Ken Griffin (Citadel Advisors)2016Q1$310.64+6.7%$7.1M
Ken Griffin (Citadel Advisors)2016Q1$310.64+6.7%$7.1M
Norges Bank (Norway SWF)2016Q1$21725.89-98.5%$35.2M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.
New positions3
Added to4
Trimmed5
Exited0
—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
14
$87.42B
2022Q2
14
$72.43B
2022Q3
16
$111.6M
2022Q4
13
$1.44B
2023Q1
14
$1.68B
2023Q2
16
$2.08B
2023Q3
20
$1.50B
2023Q4
15
$1.37B
2024Q1
15
$1.20B
2024Q2
18
$1.06B
2024Q3
16
$325.7M
2024Q4
13
$482.9M
2025Q1
16
$554.5M
2025Q2
19
$600.4M
2025Q3
14
$635.4M
2025Q4
15
$993.5M
Congress members trading this stock
DateMemberTypeAmount rangeFiling
2025-07-10Lisa McClainSell$1K – $15KPDF ↗

Who owns PEN

15 super-investors · 2025Q4
Tracked stake
4.84M
shares
Combined value
$993M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New3Added7Trim5
#ManagerSharesValue
1Ken Griffin
Citadel Advisors
990.3K$308M
2Baillie Gifford & Co876.3K$272M
3Izzy Englander
Millennium Mgmt
677.8K$211M
4AQR Capital Management184.9K$57M
5Wellington Management113.6K$35M
6Norges Bank
Norway SWF
106.3K$33M
7Izzy Englander
Millennium Mgmt
90.0K$28M
8Steve Cohen
Point72
80.8K$25M
9Two Sigma Investments24.9K$8M
10Ken Griffin
Citadel Advisors
21.5K$7M
11Ron Baron
Baron Capital / BAMCO
13.9K$4M
12D.E. Shaw & Co.7.5K$2M
13Ken Griffin
Citadel Advisors
4.7K$1M
14T. Rowe Price1.64M$511K
15Ray Dalio
Bridgewater Associates
1.2K$370K

Recent moves

20 transactions
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