Family Office · CIK 0001536411
Stanley Druckenmiller
Duquesne
Stanley Druckenmiller runs Duquesne, a family office overseeing $4.5M in disclosed equity holdings (SEC CIK 0001536411). The latest 13F filing (2025Q4) discloses 58 positions across 9 sectors, with the largest positions in NTRA, XLF and INSM. On a mark-to-market basis the tracked portfolio has returned 210.5% since 2016Q1. OpenStocks tracks 40 consecutive 13F filings for this manager — every position change, new entry, and exit is logged below.
Portfolio
$4.49M
Positions
58
Quarter
2025Q4
Filings tracked
40
Holdings
Sorted by value · 2024Q4
74 positions
Number of shares
3,566,850 sh
Holdings current value
$564.6K
Avg closing price
$2.57
+7539.8%
Last action
Trimmed 16.5%
2025Q4
Current $196.11
Number of shares
2,820,930 sh
Holdings current value
$267.2K
Avg closing price
$0.06
+511351.6%
Last action
Exited
2025Q3
Current $328.00
Number of shares
1,225,750 sh
Holdings current value
$204.0K
Avg closing price
$0.15
Last action
Trimmed 3.3%
2025Q4
Current —
4
5.33%
of portfolio
Number of shares
8,997,400 sh
Holdings current value
$198.3K
Avg closing price
$0.02
+165176.1%
Last action
Trimmed 54.4%
2025Q4
Current $31.26
Number of shares
8,902,649 sh
Holdings current value
$195.7K
Avg closing price
$18.21
+18.0%
Last action
Added 31.6%
2025Q4
Current $21.49
Number of shares
1,352,255 sh
Holdings current value
$162.7K
Avg closing price
$40.32
+287.5%
Last action
New holding
2025Q4
Current $156.24
7
G7997R103SEAGATE TECHNOLOGY HLDNGS PL
3.63%
of portfolio
Number of shares
1,564,076 sh
Holdings current value
$135.0K
Avg closing price
$0.08
Last action
Exited
2025Q4
Current —
Number of shares
1,043,805 sh
Holdings current value
$101.4K
Avg closing price
$16.67
Last action
New holding
2025Q4
Current —
Number of shares
53,725 sh
Holdings current value
$91.4K
Avg closing price
$570.69
+219.3%
Last action
Trimmed 17.2%
2025Q4
Current $1822
Number of shares
1,074,840 sh
Holdings current value
$72.3K
Avg closing price
$0.06
Last action
Exited
2025Q1
Current —
Number of shares
328,400 sh
Holdings current value
$72.0K
Avg closing price
$11.50
+2071.7%
Last action
Added 1092.9%
2025Q4
Current $249.70
Number of shares
1,687,716 sh
Holdings current value
$71.7K
Avg closing price
$0.04
Last action
Added 41.2%
2025Q4
Current —
Number of shares
2,520,275 sh
Holdings current value
$69.5K
Avg closing price
$0.03
+80320.8%
Last action
Exited
2025Q1
Current $22.18
Number of shares
2,225,300 sh
Holdings current value
$61.0K
Avg closing price
$0.02
+167297.3%
Last action
Exited
2025Q3
Current $31.79
Number of shares
1,610,040 sh
Holdings current value
$54.7K
Avg closing price
$14.16
Last action
Exited
2025Q1
Current —
Number of shares
280,060 sh
Holdings current value
$53.1K
Avg closing price
$0.18
+140906.7%
Last action
Trimmed 0.8%
2025Q4
Current $255.50
Number of shares
817,740 sh
Holdings current value
$49.5K
Avg closing price
$9.09
+669.3%
Last action
New holding
2025Q4
Current $69.89
Number of shares
4,657,650 sh
Holdings current value
$49.2K
Avg closing price
$0.01
Last action
Exited
2025Q3
Current —
Number of shares
62,190 sh
Holdings current value
$48.0K
Avg closing price
$157.15
+475.2%
Last action
Exited
2025Q3
Current $903.99
Number of shares
485,430 sh
Holdings current value
$47.0K
Avg closing price
$0.06
Last action
Exited
2025Q3
Current —
Number of shares
548,800 sh
Holdings current value
$45.4K
Avg closing price
$0.07
Last action
Exited
2025Q4
Current —
Number of shares
2,625,105 sh
Holdings current value
$44.3K
Avg closing price
$0.01
Last action
Trimmed 18.2%
2025Q4
Current —
Number of shares
3,186,855 sh
Holdings current value
$42.4K
Avg closing price
$0.01
Last action
Exited
2025Q3
Current —
Number of shares
887,580 sh
Holdings current value
$41.2K
Avg closing price
$0.04
Last action
Exited
2025Q4
Current —
Number of shares
593,470 sh
Holdings current value
$41.0K
Avg closing price
$0.31
Last action
Trimmed 61.3%
2025Q4
Current —
Number of shares
283,355 sh
Holdings current value
$39.1K
Avg closing price
$0.04
+443408.6%
Last action
Exited
2025Q4
Current $165.53
Number of shares
265,040 sh
Holdings current value
$36.5K
Avg closing price
$0.15
Last action
Exited
2025Q2
Current —
Number of shares
610,225 sh
Holdings current value
$35.1K
Avg closing price
$0.06
+79883.6%
Last action
Exited
2025Q2
Current $45.95
Number of shares
408,885 sh
Holdings current value
$34.4K
Avg closing price
$8.61
+5213.0%
Last action
Exited
2025Q1
Current $457.23
Number of shares
554,138 sh
Holdings current value
$33.4K
Avg closing price
$0.06
Last action
Exited
2025Q1
Current —
Number of shares
299,171 sh
Holdings current value
$33.3K
Avg closing price
$0.11
+207097.8%
Last action
Exited
2025Q3
Current $230.80
Number of shares
99,750 sh
Holdings current value
$32.8K
Avg closing price
$0.28
+345876.4%
Last action
Exited
2025Q4
Current $978.32
33
85205L107SPRINGWORKS THERAPEUTICS INC
0.83%
of portfolio
Number of shares
859,694 sh
Holdings current value
$31.1K
Avg closing price
$0.04
Last action
Exited
2025Q2
Current —
34
G6700G107NVENT ELECTRIC PLC
0.83%
of portfolio
Number of shares
451,065 sh
Holdings current value
$30.7K
Avg closing price
$0.07
Last action
Exited
2025Q1
Current —
Number of shares
758,905 sh
Holdings current value
$28.9K
Avg closing price
$2.56
+2568.9%
Last action
Exited
2025Q3
Current $68.28
Number of shares
448,663 sh
Holdings current value
$28.0K
Avg closing price
$17.18
Last action
Exited
2025Q3
Current —
Number of shares
146,970 sh
Holdings current value
$25.5K
Avg closing price
$0.13
Last action
Exited
2025Q1
Current —
Number of shares
417,160 sh
Holdings current value
$24.9K
Avg closing price
$0.06
+631858.3%
Last action
Exited
2025Q1
Current $361.69
Number of shares
503,595 sh
Holdings current value
$24.1K
Avg closing price
$15.77
+251.8%
Last action
Exited
2025Q1
Current $55.48
Number of shares
178,394 sh
Holdings current value
$22.0K
Avg closing price
$0.13
+129000.4%
Last action
Exited
2025Q4
Current $162.33
Number of shares
107,515 sh
Holdings current value
$21.2K
Avg closing price
$0.18
+206980.9%
Last action
Trimmed 67.4%
2025Q4
Current $363.35
Number of shares
1,761,926 sh
Holdings current value
$18.5K
Avg closing price
$0.02
+37484.0%
Last action
Exited
2025Q1
Current $6.17
Number of shares
431,545 sh
Holdings current value
$17.5K
Avg closing price
$8.68
Last action
Exited
2025Q2
Current —
Number of shares
1,592,500 sh
Holdings current value
$16.3K
Avg closing price
$0.01
Last action
Added 56.6%
2025Q4
Current —
Number of shares
919,928 sh
Holdings current value
$16.0K
Avg closing price
$5.13
+139.3%
Last action
New holding
2025Q4
Current $12.27
Number of shares
87,424 sh
Holdings current value
$15.9K
Avg closing price
$25.89
+544.9%
Last action
Exited
2025Q1
Current $166.97
Number of shares
37,675 sh
Holdings current value
$15.2K
Avg closing price
$0.40
+96198.4%
Last action
Exited
2025Q2
Current $388.90
Number of shares
76,680 sh
Holdings current value
$14.5K
Avg closing price
$52.32
+542.2%
Last action
Added
2025Q4
Current $336.02
49
Y2573F102FLEX LTD
0.36%
of portfolio
Number of shares
348,900 sh
Holdings current value
$13.4K
Avg closing price
$1.05
Last action
Exited
2025Q2
Current —
Number of shares
619,700 sh
Holdings current value
$12.5K
Avg closing price
$0.02
+154309.9%
Last action
Exited
2025Q1
Current $23.98
Number of shares
157,100 sh
Holdings current value
$11.0K
Avg closing price
$42.12
+92.9%
Last action
Exited
2025Q1
Current $81.25
Number of shares
5,183 sh
Holdings current value
$11.0K
Avg closing price
$1.84
+107532.3%
Last action
Exited
2025Q1
Current $1982
Number of shares
671,200 sh
Holdings current value
$10.9K
Avg closing price
$0.01
+112617.0%
Last action
Exited
2025Q1
Current $16.57
Number of shares
79,635 sh
Holdings current value
$10.3K
Avg closing price
$67.68
+137.3%
Last action
Exited
2025Q1
Current $160.59
Number of shares
233,500 sh
Holdings current value
$10.1K
Avg closing price
$0.04
+115469.3%
Last action
Exited
2025Q1
Current $49.43
Number of shares
154,000 sh
Holdings current value
$9.6K
Avg closing price
$0.06
Last action
Exited
2025Q1
Current —
Number of shares
527,000 sh
Holdings current value
$9.0K
Avg closing price
$0.02
+136967.3%
Last action
Exited
2025Q1
Current $21.67
Number of shares
1,472,225 sh
Holdings current value
$8.3K
Avg closing price
$0.00
Last action
Exited
2025Q1
Current —
59
N62509109NEWAMSTERDAM PHARMA COMPANY
0.20%
of portfolio
Number of shares
287,535 sh
Holdings current value
$7.4K
Avg closing price
$0.03
Last action
Added
2025Q4
Current —
Number of shares
86,265 sh
Holdings current value
$7.1K
Avg closing price
$0.10
+63363.8%
Last action
Exited
2025Q1
Current $62.20
Number of shares
122,700 sh
Holdings current value
$6.3K
Avg closing price
$0.05
Last action
Exited
2025Q1
Current —
Number of shares
342,700 sh
Holdings current value
$6.0K
Avg closing price
$0.02
+110331.9%
Last action
Exited
2025Q1
Current $19.27
63
867975104SUNRISE COMMUNICATIONS AG
0.15%
of portfolio
Number of shares
133,152 sh
Holdings current value
$5.7K
Avg closing price
$0.04
Last action
Exited
2025Q1
Current —
Number of shares
74,100 sh
Holdings current value
$5.7K
Avg closing price
$0.07
Last action
Exited
2025Q1
Current —
Number of shares
72,655 sh
Holdings current value
$5.1K
Avg closing price
$6.78
+1807.9%
Last action
Exited
2025Q4
Current $129.34
Number of shares
467,255 sh
Holdings current value
$4.8K
Avg closing price
$0.01
+116261.2%
Last action
Exited
2025Q4
Current $15.43
Number of shares
37,300 sh
Holdings current value
$4.7K
Avg closing price
$0.13
+55057.5%
Last action
Exited
2025Q1
Current $69.25
68
G3643J108FLUTTER ENTMT PLC
0.13%
of portfolio
Number of shares
18,100 sh
Holdings current value
$4.7K
Avg closing price
$0.22
Last action
Trimmed 94.1%
2025Q3
Current —
Number of shares
21,500 sh
Holdings current value
$4.2K
Avg closing price
$65.60
+162.1%
Last action
Exited
2025Q1
Current $171.95
Number of shares
85,445 sh
Holdings current value
$3.6K
Avg closing price
$0.06
Last action
Exited
2025Q2
Current —
Number of shares
41,710 sh
Holdings current value
$3.2K
Avg closing price
$15.19
+840.1%
Last action
Exited
2025Q1
Current $142.76
Number of shares
426,921 sh
Holdings current value
$2.1K
Avg closing price
$0.01
Last action
Exited
2025Q1
Current —
73
G65163100JOBY AVIATION INC
0.01%
of portfolio
Number of shares
31,489 sh
Holdings current value
$256
Avg closing price
$0.01
Last action
Exited
2025Q3
Current —
Number of shares
571,425 sh
Holdings current value
$253
Avg closing price
$0.00
Last action
Exited
2025Q2
Current —
Portfolio heatmap
Box size = % of portfolio · color = return since filing
SEAGATE TECHNOLOGY HLDNGS PL
3.63%
Sector exposure
Share of dollar value across the latest 13F report. Unclassified positions excluded.
- Healthcare11 pos$915K30.0%
- Industrials9 pos$512K16.8%
- Technology9 pos$452K14.8%
- Consumer Cyclical4 pos$374K12.3%
- Financial Services16 pos$338K11.1%
- Consumer Defensive2 pos$167K5.5%
- Energy2 pos$133K4.3%
- Communication Services3 pos$74K2.4%
- Basic Materials2 pos$46K1.5%
- Utilities1 pos$39K1.3%
(14.1% unclassified, excluded from %)