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 | |
|---|---|---|---|---|---|---|---|
4076
PUT
Harmony Biosciences
HRMY
$2.3B
| $241K | ﹤0.01% |
+8,600
| New | +$282K |
2026 Q1
0 quarters
|
|
4077
PUT
Albertsons Companies
ACI
$5.69B
| $240K | ﹤0.01% |
14,100
+400
| +3% | +$6.94K |
2020 Q3
22 quarters
|
|
4078
CALL
Kyverna Therapeutics
KYTX
$403M
| $240K | ﹤0.01% |
27,800
+18,400
| +196% | +$153K |
2025 Q2
3 quarters
|
|
|
TPC
4079
CALL
Tutor Perini Cor
TPC
$4.38B
| $239K | ﹤0.01% |
3,100
-23,700
| -88% | -$1.81M |
2016 Q2
39 quarters
|
|
4080
State Street SPDR S&P Dividend ETF
SDY
$20.5B
| $239K | ﹤0.01% |
+1,639
| New | +$244K |
2026 Q1
0 quarters
|
|
4081
CALL
Kinsale Capital Group
KNSL
$7.62B
| $239K | ﹤0.01% |
700
| – | – |
2019 Q2
27 quarters
|
|
4082
United States 12 Month Oil Fund,
USL
$49.2M
| $239K | ﹤0.01% |
+4,961
| New | +$197K |
2026 Q1
0 quarters
|
|
4083
AirSculpt Technologies
AIRS
$123M
| $239K | ﹤0.01% |
+84,478
| New | +$197K |
2026 Q1
0 quarters
|
|
4084
CALL
TAL Education Group
TAL
$6.75B
| $239K | ﹤0.01% |
21,000
-2,600
| -11% | -$29.3K |
2016 Q2
39 quarters
|
|
4085
CALL
Ambev
ABEV
$44.7B
| $239K | ﹤0.01% |
81,700
-24,200
| -23% | -$69.1K |
2021 Q2
19 quarters
|
|
4086
PUT
RingCentral
RNG
$6.54B
| $238K | ﹤0.01% |
6,400
+1,700
| +36% | +$54.8K |
2021 Q1
20 quarters
|
|
|
PROF
4087
Profound Medical
PROF
$214M
| $238K | ﹤0.01% |
36,718
+36,121
| +6,050% | +$250K |
2025 Q1
4 quarters
|
|
4088
PUT
WPP
WPP
$5.44B
| $238K | ﹤0.01% |
15,300
+14,700
| +2,450% | +$276K |
2023 Q3
10 quarters
|
|
4089
PUT
Tonix Pharmaceuticals
TNXP
$158M
| $238K | ﹤0.01% |
+17,300
| New | +$266K |
2026 Q1
0 quarters
|
|
4090
CALL
Aecom
ACM
$7.67B
| $237K | ﹤0.01% |
2,800
-7,400
| -73% | -$701K |
2015 Q4
41 quarters
|
|
|
4091
PUT
Aecom
ACM
$7.67B
| $237K | ﹤0.01% |
2,800
-4,100
| -59% | -$389K |
2019 Q2
27 quarters
|
|
4092
CALL
Universal Corp
UVV
$1.04B
| $237K | ﹤0.01% |
4,500
+2,400
| +114% | +$129K |
2018 Q1
32 quarters
|
|
4093
CALL
Groupon
GRPN
$794M
| $237K | ﹤0.01% |
19,900
-266,000
| -93% | -$3.55M |
2015 Q3
42 quarters
|
|
4094
CALL
Global Net Lease
GNL
$1.91B
| $237K | ﹤0.01% |
25,300
+22,800
| +912% | +$215K |
2019 Q1
28 quarters
|
|
|
FLNA
4095
Filana Therapeutics
FLNA
$46.6M
| $237K | ﹤0.01% |
139,995
-33,070
| -19% | -$68.1K |
2024 Q4
5 quarters
|
|
4096
CALL
Danaos Corp
DAC
$2.94B
| $237K | ﹤0.01% |
2,100
+1,200
| +133% | +$128K |
2020 Q4
21 quarters
|
|
4097
Denali Therapeutics
DNLI
$3.28B
| $236K | ﹤0.01% |
+12,315
| New | +$245K |
2026 Q1
0 quarters
|
|
4098
PUT
Canadian National Railway
CNI
$70.8B
| $236K | ﹤0.01% |
2,300
-12,600
| -85% | -$1.3M |
2018 Q1
32 quarters
|
|
4099
CALL
Mohawk Industries
MHK
$8.48B
| $236K | ﹤0.01% |
2,400
+600
| +33% | +$69.9K |
2016 Q3
38 quarters
|
|
4100
PUT
Chegg
CHGG
$78.9M
| $236K | ﹤0.01% |
318,300
+256,600
| +416% | +$180K |
2018 Q1
32 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.