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 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2126
CALL
Allstate
ALL
$67.3B
| $1.43M | ﹤0.01% |
6,900
-12,600
| -65% | -$2.58M |
|
2127
PUT
Manchester United
MANU
$3.96B
| $1.43M | ﹤0.01% |
85,000
-280,900
| -77% | -$4.79M |
|
2128
CALL
Dave Inc
DAVE
$5.16B
| $1.43M | ﹤0.01% |
8,200
-4,100
| -33% | -$796K |
|
2129
LKQ Corp
LKQ
$6.69B
| $1.43M | ﹤0.01% |
48,548
+44,605
| +1,131% | +$1.43M |
|
2130
CALL
Brown-Forman Class B
BF.B
$12.6B
| $1.43M | ﹤0.01% |
53,900
+23,500
| +77% | +$631K |
|
2131
PUT
Navios Maritime Partners
NMM
$2.21B
| $1.42M | ﹤0.01% |
+21,100
| New | +$1.31M |
|
2132
CALL
Murphy Oil
MUR
$5.38B
| $1.42M | ﹤0.01% |
34,500
+15,400
| +81% | +$522K |
|
2133
CALL
BioNTech
BNTX
$23B
| $1.42M | ﹤0.01% |
16,000
-11,200
| -41% | -$1.15M |
|
|
ETH
2134
Grayscale Ethereum Staking Mini ETF Shares
ETH
$1.78B
| $1.42M | ﹤0.01% |
+71,549
| New | +$1.62M |
|
2135
PUT
Ryan Specialty Holdings
RYAN
$5.59B
| $1.42M | ﹤0.01% |
+42,100
| New | +$1.8M |
|
|
TERN
2136
PUT
DELISTED
Terns Pharmaceuticals
TERN
| $1.42M | ﹤0.01% |
26,900
+21,100
| +364% | +$867K |
|
|
PONY
2137
PUT
Pony AI Inc
PONY
$3.21B
| $1.42M | ﹤0.01% |
150,200
+15,000
| +11% | +$207K |
|
|
ORR
2138
Militia Long/Short Equity ETF
ORR
$340M
| $1.42M | ﹤0.01% |
+38,892
| New | +$1.43M |
|
2139
PUT
Kratos Defense & Security Solutions
KTOS
$9.27B
| $1.42M | ﹤0.01% |
+20,100
| New | +$1.93M |
|
2140
CALL
Symbotic
SYM
$5.28B
| $1.42M | ﹤0.01% |
26,600
-44,800
| -63% | -$2.56M |
|
2141
CALL
Fidelity National Information Services
FIS
$22.3B
| $1.41M | ﹤0.01% |
+30,100
| New | +$1.62M |
|
2142
PUT
Beyond Meat
BYND
$283M
| $1.41M | ﹤0.01% |
2,011,000
-1,095,300
| -35% | -$875K |
|
2143
PUT
Enterprise Products Partners
EPD
$82.5B
| $1.41M | ﹤0.01% |
37,300
-44,100
| -54% | -$1.56M |
|
2144
CALL
PACS Group
PACS
$7.45B
| $1.41M | ﹤0.01% |
43,900
-132,600
| -75% | -$4.88M |
|
2145
CALL
Dick's Sporting Goods
DKS
$18.4B
| $1.41M | ﹤0.01% |
7,100
-10,200
| -59% | -$2.07M |
|
2146
CALL
BlackSky Technology
BKSY
$819M
| $1.4M | ﹤0.01% |
55,800
+41,700
| +296% | +$996K |
|
2147
PUT
Sprouts Farmers Market
SFM
$7.23B
| $1.4M | ﹤0.01% |
18,100
-28,500
| -61% | -$2.13M |
|
2148
CALL
Crocs
CROX
$6.69B
| $1.39M | ﹤0.01% |
16,800
-73,500
| -81% | -$6.3M |
|
|
NNE
2149
PUT
Nano Nuclear Energy
NNE
$875M
| $1.39M | ﹤0.01% |
68,100
-19,900
| -23% | -$543K |
|
2150
Tower Semiconductor
TSEM
$25.3B
| $1.39M | ﹤0.01% |
7,942
+6,246
| +368% | +$840K |
|
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 withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- 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 2,156 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.