Simplex Trading Portfolio holdings
Simplex Trading, founded in 2004 and headquartered in Chicago, Illinois, is a technology-driven proprietary trading firm specializing in market-making and liquidity provision, primarily in U.S. equity options and futures options. Leveraging advanced proprietary software and data-driven analysis, the firm optimizes trading strategies and develops innovative solutions to capitalize on financial market opportunities, maintaining a competitive edge through automation and a collaborative team of technologists and traders. With a workforce exceeding 300 and led by CEO Erik Swanson since 2014, Simplex operates with a low-ego, high-intelligence culture, focusing on minimal bureaucracy and rapid execution, while also making strategic venture capital investments in fintech startups. Recognized as a top workplace in Chicago by Built In’s 2025 awards, Simplex continues to evolve, blending cutting-edge technology with a commitment to market efficiency and growth.
Top Buys
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
|
HIVE
4976
HIVE Digital Technologies
HIVE
$817M
| $109K | ﹤0.01% |
+57,527
| New | +$142K |
2026 Q1
0 quarters
|
|
4977
PUT
DoubleVerify
DV
$2.11B
| $109K | ﹤0.01% |
11,500
+1,200
| +12% | +$12.3K |
2021 Q2
19 quarters
|
|
4978
PUT
Consensus Cloud Solutions
CCSI
$648M
| $109K | ﹤0.01% |
+4,600
| New | +$118K |
2026 Q1
0 quarters
|
|
4979
PUT
Dianthus Therapeutics
DNTH
$4.93B
| $109K | ﹤0.01% |
1,300
-39,700
| -97% | -$2.3M |
2025 Q1
4 quarters
|
|
4980
CALL
Vulcan Materials
VMC
$31.5B
| $109K | ﹤0.01% |
400
| – | – |
2014 Q4
45 quarters
|
|
4981
CALL
Natural Resource Partners
NRP
$1.45B
| $109K | ﹤0.01% |
900
-1,200
| -57% | -$142K |
2018 Q2
31 quarters
|
|
4982
PUT
Edgewell Personal Care
EPC
$1.24B
| $109K | ﹤0.01% |
5,100
-500
| -9% | -$10.1K |
2025 Q3
2 quarters
|
|
4983
PUT
Fortress Biotech
FBIO
$67.7M
| $109K | ﹤0.01% |
39,000
-5,500
| -12% | -$18.7K |
2025 Q3
2 quarters
|
|
4984
PUT
TransAlta
TAC
$3.91B
| $109K | ﹤0.01% |
8,300
-15,200
| -65% | -$196K |
2025 Q3
2 quarters
|
|
4985
Solid Biosciences
SLDB
$734M
| $109K | ﹤0.01% |
15,097
-45,437
| -75% | -$292K |
2025 Q3
2 quarters
|
|
|
CHYM
4986
PUT
Chime Financial
CHYM
$10.3B
| $109K | ﹤0.01% |
5,800
-3,600
| -38% | -$81.6K |
2025 Q2
3 quarters
|
|
4987
Direxion Daily Junior Gold Miners Index Bear 2X ETF
JDST
$39.4M
| $109K | ﹤0.01% |
3,129
-3,878
| -55% | -$139K |
2025 Q4
1 quarter
|
|
4988
PUT
Covenant Logistics
CVLG
$857M
| $109K | ﹤0.01% |
+4,000
| New | +$107K |
2026 Q1
0 quarters
|
|
|
KWY
4989
Kingsway Corp
KWY
$273M
| $108K | ﹤0.01% |
+10,398
| New | +$126K |
2026 Q1
0 quarters
|
|
|
DFDV
4990
CALL
DeFi Development Corp
DFDV
$171M
| $108K | ﹤0.01% |
57,300
-61,500
| -52% | -$296K |
2025 Q2
3 quarters
|
|
4991
GoodRx Holdings
GDRX
$1.12B
| $108K | ﹤0.01% |
55,254
+21,189
| +62% | +$49.7K |
2024 Q2
7 quarters
|
|
4992
CALL
O-I Glass
OI
$860M
| $108K | ﹤0.01% |
10,300
+300
| +3% | +$4.13K |
2016 Q1
40 quarters
|
|
4993
PUT
Sturm, Ruger & Co
RGR
$709M
| $108K | ﹤0.01% |
2,700
-1,500
| -36% | -$57K |
2014 Q4
45 quarters
|
|
4994
CALL
Ituran Location and Control
ITRN
$1.04B
| $108K | ﹤0.01% |
2,200
-500
| -19% | -$23.6K |
2023 Q4
9 quarters
|
|
4995
PUT
MDU Resources
MDU
$3.91B
| $108K | ﹤0.01% |
5,200
| – | – |
2025 Q3
2 quarters
|
|
|
ARIS
4996
PUT
Aris Mining
ARIS
$3.61B
| $108K | ﹤0.01% |
5,800
-20,800
| -78% | -$393K |
2025 Q4
1 quarter
|
|
|
PURR
4997
Hyperliquid Strategies Inc
PURR
$2.35B
| $108K | ﹤0.01% |
+21,127
| New | +$95.6K |
2026 Q1
0 quarters
|
|
4998
Encompass Health
EHC
$11.8B
| $107K | ﹤0.01% |
+1,110
| New | +$114K |
2026 Q1
0 quarters
|
|
4999
PUT
CS Disco
LAW
$271M
| $107K | ﹤0.01% |
+28,100
| New | +$139K |
2026 Q1
0 quarters
|
|
|
DAWN
5000
CALL
DELISTED
Day One Biopharmaceuticals
DAWN
| $107K | ﹤0.01% |
+5,000
| New | +$70.5K |
2026 Q1
0 quarters
|
|
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Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,157 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.