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 | |
|---|---|---|---|---|---|---|---|
5101
PUT
Group 1 Automotive
GPI
$2.98B
| $99.2K | ﹤0.01% |
300
-300
| -50% | -$105K |
2019 Q2
27 quarters
|
|
5102
Copa Holdings
CPA
$5.41B
| $99.2K | ﹤0.01% |
+873
| New | +$115K |
2026 Q1
0 quarters
|
|
|
TXNM
5103
TXNM Energy Inc
TXNM
$6.43B
| $99.1K | ﹤0.01% |
1,695
-1,874
| -53% | -$110K |
2025 Q2
3 quarters
|
|
5104
CALL
Central Pacific Financial
CPF
$938M
| $99.1K | ﹤0.01% |
3,100
+1,300
| +72% | +$41.9K |
2025 Q3
2 quarters
|
|
5105
Ultragenyx Pharmaceutical
RARE
$1.5B
| $99.1K | ﹤0.01% |
+4,729
| New | +$106K |
2026 Q1
0 quarters
|
|
5106
PUT
Arcutis Biotherapeutics
ARQT
$3.16B
| $99K | ﹤0.01% |
4,200
+200
| +5% | +$5.1K |
2023 Q1
12 quarters
|
|
5107
CALL
Nerdy
NRDY
$65M
| $98.8K | ﹤0.01% |
8,073
+4,593
| +132% | +$66K |
2025 Q4
1 quarter
|
|
|
TGEN
5108
PUT
Tecogen Inc
TGEN
$80M
| $98.8K | ﹤0.01% |
38,600
-19,600
| -34% | -$72K |
2025 Q3
2 quarters
|
|
5109
PUT
Crexendo
CXDO
$197M
| $98.7K | ﹤0.01% |
16,000
-3,300
| -17% | -$21.7K |
2024 Q3
6 quarters
|
|
|
PUSA
5110
CALL
Aureus Greenway Holdings
PUSA
$87.4M
| $98.6K | ﹤0.01% |
+29,100
| New | +$119K |
2026 Q1
0 quarters
|
|
5111
PUT
Matsons
MATX
$6.91B
| $98.4K | ﹤0.01% |
600
-4,400
| -88% | -$684K |
2025 Q1
4 quarters
|
|
5112
CALL
Pilgrim's Pride
PPC
$6.55B
| $98.2K | ﹤0.01% |
2,600
-2,600
| -50% | -$105K |
2014 Q4
45 quarters
|
|
5113
PUT
FLEX LNG
FLNG
$1.69B
| $98K | ﹤0.01% |
3,300
-8,700
| -73% | -$241K |
2022 Q1
16 quarters
|
|
|
AVB
5114
CALL
DELISTED
AvalonBay Communities
AVB
| $98K | ﹤0.01% |
600
-10,200
| -94% | -$1.78M |
2015 Q1
44 quarters
|
|
5115
PUT
Inspire Medical Systems
INSP
$2.02B
| $98K | ﹤0.01% |
1,900
+700
| +58% | +$49K |
2021 Q1
20 quarters
|
|
5116
PUT
Brookfield Renewable
BEP
$8.51B
| $97.9K | ﹤0.01% |
+3,000
| New | +$90.4K |
2026 Q1
0 quarters
|
|
5117
CALL
Exponent
EXPO
$3.2B
| $97.9K | ﹤0.01% |
1,500
-900
| -38% | -$64K |
2025 Q4
1 quarter
|
|
5118
Garrett Motion
GTX
$5.05B
| $97.7K | ﹤0.01% |
5,378
-10,025
| -65% | -$187K |
2024 Q2
7 quarters
|
|
|
5119
Matsons
MATX
$6.91B
| $97.7K | ﹤0.01% |
+596
| New | +$92.7K |
2026 Q1
0 quarters
|
|
5120
PUT
Smith & Wesson
SWBI
$656M
| $97.4K | ﹤0.01% |
6,800
-27,900
| -80% | -$339K |
2015 Q4
41 quarters
|
|
5121
CALL
MaxLinear
MXL
$9.61B
| $97.4K | ﹤0.01% |
5,600
-57,300
| -91% | -$1.03M |
2020 Q1
24 quarters
|
|
5122
CALL
Bread Financial
BFH
$3.77B
| $97.4K | ﹤0.01% |
+1,300
| New | +$95.8K |
2026 Q1
0 quarters
|
|
5123
Subversive Congressional Democrats Trading ETF
NANC
$299M
| $97.4K | ﹤0.01% |
2,307
-1,387
| -38% | -$62K |
2025 Q3
2 quarters
|
|
5124
PUT
Federal Signal
FSS
$7.1B
| $97.3K | ﹤0.01% |
+900
| New | +$102K |
2026 Q1
0 quarters
|
|
5125
CALL
KRONOS Worldwide
KRO
$895M
| $97.2K | ﹤0.01% |
14,800
| – | – |
2025 Q4
1 quarter
|
|
Similar funds
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.