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 | |
|---|---|---|---|---|---|---|
1826
PUT
KeyCorp
KEY
$24.3B
| $1.98M | ﹤0.01% |
98,800
-71,700
| -42% | -$1.5M |
|
1827
PUT
Itron
ITRI
$3.73B
| $1.98M | ﹤0.01% |
22,100
+18,400
| +497% | +$1.77M |
|
1828
CALL
Sigma Lithium
SGML
$1.08B
| $1.97M | ﹤0.01% |
160,000
-208,800
| -57% | -$2.67M |
|
|
ORLA
1829
CALL
Orla Mining
ORLA
$3.48B
| $1.96M | ﹤0.01% |
121,800
+59,500
| +96% | +$988K |
|
1830
PUT
Babcock & Wilcox
BW
$1.43B
| $1.96M | ﹤0.01% |
+133,500
| New | +$1.4M |
|
1831
CALL
Gevo
GEVO
$397M
| $1.96M | ﹤0.01% |
718,300
+33,200
| +5% | +$68.7K |
|
1832
PUT
New York Times
NYT
$11.6B
| $1.96M | ﹤0.01% |
23,400
+23,200
| +11,600% | +$1.75M |
|
1833
PUT
McCormick & Company Non-Voting
MKC
$13.4B
| $1.96M | ﹤0.01% |
38,800
-37,300
| -49% | -$2.38M |
|
1834
PUT
Evolv Technologies
EVLV
$943M
| $1.96M | ﹤0.01% |
+323,300
| New | +$1.89M |
|
1835
PUT
Rayonier Advanced Materials
RYAM
$565M
| $1.95M | ﹤0.01% |
176,500
-449,700
| -72% | -$4.06M |
|
1836
Invesco Solar ETF
TAN
$1.47B
| $1.95M | ﹤0.01% |
+35,060
| New | +$1.94M |
|
1837
Teradyne
TER
$54.8B
| $1.95M | ﹤0.01% |
6,572
+3,824
| +139% | +$1.07M |
|
1838
PUT
Vodafone
VOD
$34.9B
| $1.95M | ﹤0.01% |
129,700
-80,200
| -38% | -$1.17M |
|
1839
CALL
MoonLake Immunotherapeutics
MLTX
$1.59B
| $1.95M | ﹤0.01% |
104,500
-9,500
| -8% | -$157K |
|
1840
Clorox
CLX
$11.6B
| $1.94M | ﹤0.01% |
18,708
+10,497
| +128% | +$1.19M |
|
1841
CALL
Shake Shack
SHAK
$2.3B
| $1.94M | ﹤0.01% |
21,900
+100
| +0.5% | +$9.2K |
|
1842
PUT
New Oriental
EDU
$7.84B
| $1.94M | ﹤0.01% |
+34,200
| New | +$1.95M |
|
1843
CALL
McEwen Inc
MUX
$1.03B
| $1.93M | ﹤0.01% |
94,600
-39,400
| -29% | -$936K |
|
1844
PUT
Ralph Lauren
RL
$22.2B
| $1.93M | ﹤0.01% |
5,600
-17,500
| -76% | -$6.22M |
|
1845
PUT
Illinois Tool Works
ITW
$81.4B
| $1.93M | ﹤0.01% |
7,400
+6,700
| +957% | +$1.82M |
|
1846
Sable Offshore Corp
SOC
$903M
| $1.92M | ﹤0.01% |
116,509
-12,942
| -10% | -$151K |
|
1847
CALL
Cal-Maine
CALM
$4.28B
| $1.92M | ﹤0.01% |
24,300
+10,300
| +74% | +$846K |
|
1848
PUT
Alkami Technology
ALKT
$1.8B
| $1.92M | ﹤0.01% |
+122,500
| New | +$2.26M |
|
1849
DaVita
DVA
$15.1B
| $1.92M | ﹤0.01% |
+12,475
| New | +$1.69M |
|
1850
CALL
SSR Mining
SSRM
$5.57B
| $1.92M | ﹤0.01% |
65,200
-263,800
| -80% | -$7M |
|
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.