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 | |
|---|---|---|---|---|---|---|---|
5551
CALL
Wrap Technologies
WRAP
$90.8M
| $66.1K | ﹤0.01% |
42,900
+40,300
| +1,550% | +$79.4K |
2020 Q1
24 quarters
|
|
|
HUYA
5552
PUT
Huya Inc
HUYA
$525M
| $66K | ﹤0.01% |
20,000
+16,500
| +471% | +$60.8K |
2020 Q4
21 quarters
|
|
5553
US Gold Corp
USAU
$239M
| $65.9K | ﹤0.01% |
+4,341
| New | +$77.8K |
2026 Q1
0 quarters
|
|
5554
IHS Holding
IHS
$2.81B
| $65.9K | ﹤0.01% |
8,011
+624
| +8% | +$5K |
2023 Q3
10 quarters
|
|
5555
CALL
Playtika
PLTK
$831M
| $65.9K | ﹤0.01% |
23,700
+11,100
| +88% | +$36.4K |
2021 Q1
20 quarters
|
|
5556
CALL
Allogene Therapeutics
ALLO
$518M
| $65.9K | ﹤0.01% |
27,000
+23,900
| +771% | +$47.9K |
2018 Q4
29 quarters
|
|
5557
CALL
Rekor Systems
REKR
$51.1M
| $65.8K | ﹤0.01% |
80,300
-8,500
| -10% | -$9.1K |
2020 Q4
21 quarters
|
|
|
GOOS
5558
Canada Goose Holdings
GOOS
$748M
| $65.8K | ﹤0.01% |
5,999
-20,865
| -78% | -$251K |
2025 Q3
2 quarters
|
|
|
ETHD
5559
ProShares UltraShort Ether ETF
ETHD
$58.6M
| $65.7K | ﹤0.01% |
+1,044
| New | +$67.9K |
2026 Q1
0 quarters
|
|
5560
PUT
Extra Space Storage
EXR
$28.2B
| $65.6K | ﹤0.01% |
500
+400
| +400% | +$56.4K |
2016 Q4
37 quarters
|
|
5561
PUT
Evergy
EVRG
$18.3B
| $65.5K | ﹤0.01% |
800
-5,200
| -87% | -$411K |
2019 Q1
28 quarters
|
|
5562
PUT
Solid Biosciences
SLDB
$734M
| $65.5K | ﹤0.01% |
9,100
+6,600
| +264% | +$42.4K |
2025 Q1
4 quarters
|
|
5563
PUT
Xerox
XRX
$397M
| $65.4K | ﹤0.01% |
43,100
+28,800
| +201% | +$56.9K |
2021 Q2
19 quarters
|
|
5564
PUT
Rogers Communications
RCI
$16.7B
| $65.4K | ﹤0.01% |
1,700
-13,800
| -89% | -$526K |
2023 Q3
10 quarters
|
|
5565
Embecta
EMBC
$320M
| $65.4K | ﹤0.01% |
+7,393
| New | +$77K |
2026 Q1
0 quarters
|
|
5566
3D Systems Corp
DDD
$628M
| $65.3K | ﹤0.01% |
34,739
+34,203
| +6,381% | +$75.9K |
2025 Q3
2 quarters
|
|
|
ASM
5567
Avino Silver & Gold Mines
ASM
$943M
| $65.3K | ﹤0.01% |
+10,332
| New | +$82.6K |
2026 Q1
0 quarters
|
|
5568
CALL
Puma Biotechnology
PBYI
$491M
| $65.2K | ﹤0.01% |
10,200
-500
| -5% | -$3.22K |
2021 Q2
19 quarters
|
|
5569
Lemonade
LMND
$3.6B
| $65.1K | ﹤0.01% |
1,039
-41,867
| -98% | -$2.9M |
2024 Q3
6 quarters
|
|
5570
PUT
Ferrovial N.V. Ordinary Shares
FER
$38.6B
| $65K | ﹤0.01% |
+1,010
| New | +$68K |
2026 Q1
0 quarters
|
|
5571
CarGurus
CARG
$2.67B
| $65K | ﹤0.01% |
+1,910
| New | +$62.5K |
2026 Q1
0 quarters
|
|
5572
PUT
Terex
TEX
$6.48B
| $65K | ﹤0.01% |
1,100
-1,400
| -56% | -$86.7K |
2014 Q4
45 quarters
|
|
5573
Ring Energy
REI
$341M
| $65K | ﹤0.01% |
42,478
+16,062
| +61% | +$20.4K |
2025 Q3
2 quarters
|
|
5574
Trupanion
TRUP
$1.03B
| $64.8K | ﹤0.01% |
+2,532
| New | +$75.7K |
2026 Q1
0 quarters
|
|
5575
Limbach Holdings
LMB
$586M
| $64.8K | ﹤0.01% |
+830
| New | +$69.9K |
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.