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 |
NVIDIA
NVDA
|
+$93M |
| 2 |
Citigroup
C
|
+$74.8M |
| 3 |
Pinduoduo
PDD
|
+$50.7M |
| 4 |
Intel
INTC
|
+$47.1M |
| 5 |
Broadcom
AVGO
|
+$46.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street Energy Select Sector SPDR ETF
XLE
|
+$94.5M |
| 2 |
Pfizer
PFE
|
+$66.4M |
| 3 |
Boeing
BA
|
+$61.6M |
| 4 |
PayPal
PYPL
|
+$42.2M |
| 5 |
GE Aerospace
GE
|
+$42M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.53% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.21% |
| 4 | Financials | 0.2% |
| 5 | Materials | 0.12% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2926
CALL
Aehr Test Systems
AEHR
$2.38B
| $984K | ﹤0.01% |
88,100
-19,500
| -18% | -$227K |
|
2927
PUT
Westlake Corp
WLK
$9.3B
| $984K | ﹤0.01% |
6,800
-3,700
| -35% | -$568K |
|
2928
CALL
HEICO Corp Class A
HEI.A
$35.8B
| $983K | ﹤0.01% |
4,400
-16,100
| -79% | -$2.72M |
|
2929
CALL
Pool Corp
POOL
$6.76B
| $983K | ﹤0.01% |
3,200
-9,000
| -74% | -$3.26M |
|
|
CVSA
2930
CALL
Covista Inc
CVSA
$4.06B
| $982K | ﹤0.01% |
14,400
-1,200
| -8% | -$70.4K |
|
2931
PUT
Evolv Technologies
EVLV
$979M
| $982K | ﹤0.01% |
385,400
-49,500
| -11% | -$164K |
|
2932
Honeywell
HON
$77.1B
| $982K | ﹤0.01% |
4,882
+4,545
| +1,349% | +$865K |
|
|
MASI
2933
PUT
DELISTED
Masimo
MASI
| $982K | ﹤0.01% |
7,800
-8,500
| -52% | -$1.12M |
|
2934
CALL
Ameren
AEE
$31.1B
| $981K | ﹤0.01% |
13,800
+9,500
| +221% | +$691K |
|
2935
PUT
Perion Network
PERI
$374M
| $981K | ﹤0.01% |
117,500
-72,300
| -38% | -$877K |
|
|
SPWR
2936
PUT
DELISTED
SunPower Corporation Common Stock
SPWR
| $981K | ﹤0.01% |
331,700
-232,200
| -41% | -$634K |
|
2937
PUT
iRhythm Holdings
IRTC
$3.74B
| $979K | ﹤0.01% |
9,100
-2,400
| -21% | -$245K |
|
2938
CALL
Delek US
DK
$3.89B
| $978K | ﹤0.01% |
39,500
-25,100
| -39% | -$694K |
|
2939
CALL
Cooper Companies
COO
$13.9B
| $977K | ﹤0.01% |
11,200
-33,200
| -75% | -$3.1M |
|
2940
CALL
Main Street Capital
MAIN
$5.03B
| $974K | ﹤0.01% |
19,300
-4,400
| -19% | -$215K |
|
2941
PUT
BlackBerry
BB
$4.92B
| $972K | ﹤0.01% |
392,200
+260,400
| +198% | +$726K |
|
2942
PUT
Gogo Inc
GOGO
$527M
| $972K | ﹤0.01% |
101,100
+96,200
| +1,963% | +$911K |
|
|
CNH
2943
PUT
CNH Industrial
CNH
$13.6B
| $972K | ﹤0.01% |
96,000
-158,900
| -62% | -$1.8M |
|
|
AZUL
2944
CALL
DELISTED
Azul
AZUL
| $970K | ﹤0.01% |
242,600
+91,700
| +61% | +$537K |
|
2945
VinFast Auto
VFS
$6.74B
| $970K | ﹤0.01% |
225,736
+43,764
| +24% | +$170K |
|
2946
CALL
Summit Therapeutics
SMMT
$10.6B
| $969K | ﹤0.01% |
124,300
+100,200
| +416% | +$541K |
|
2947
PUT
Mitek Systems
MITK
$776M
| $968K | ﹤0.01% |
86,600
+40,200
| +87% | +$515K |
|
2948
PUT
HighPeak Energy
HPK
$903M
| $967K | ﹤0.01% |
68,800
+55,600
| +421% | +$821K |
|
2949
PUT
Petco
WOOF
$768M
| $967K | ﹤0.01% |
255,900
-49,700
| -16% | -$127K |
|
2950
PUT
Kanzhun
BZ
$7.01B
| $964K | ﹤0.01% |
51,300
-11,700
| -19% | -$236K |
|
Similar funds
Simplex Trading's Q2 2024 Portfolio in Review
As of Q2 2024, Simplex Trading held 10,213 positions worth $162B, down 6.5% from $173B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading withdrew a net $19.2B in Q2 2024, closing 1,431 positions and reducing 4,061 holdings. Its most notable exit was Boeing, an estimated $61.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.53% of assets, up from 0.38% a quarter earlier, followed by Consumer Discretionary and Healthcare.
Against the trend, Simplex Trading opened a new position in Citigroup worth $77M.
- Simplex Trading's largest Q2 2024 buy was Citigroup: 1,213,247 shares worth $77M.
- Simplex Trading added most to NVIDIA in Q2 2024, an estimated $93M increase.
- Simplex Trading's biggest Q2 2024 reduction was State Street Energy Select Sector SPDR ETF, cutting an estimated $94.5M.
- Simplex Trading fully exited Boeing in Q2 2024, selling an estimated $61.6M.
- Simplex Trading's ten largest holdings make up 50% of its $162B portfolio in Q2 2024.
- Simplex Trading opened 1,358 new positions and closed 1,431 in Q2 2024.
- Simplex Trading's portfolio value fell 6.5% quarter-over-quarter to $162B.
Based on Simplex Trading's 13F filing for Q2 2024, filed 25 Jul 2024.