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 | |
|---|---|---|---|---|---|---|
3126
PUT
Corsair Gaming
CRSR
$1.13B
| $816K | ﹤0.01% |
74,000
| – | – |
|
3127
PUT
Owens Corning
OC
$11.6B
| $816K | ﹤0.01% |
4,700
-700
| -13% | -$121K |
|
3128
CALL
Leggett & Platt
LEG
$1.5B
| $815K | ﹤0.01% |
71,200
+36,600
| +106% | +$517K |
|
|
BCPC
3129
CALL
Balchem Corp
BCPC
$5.29B
| $815K | ﹤0.01% |
5,300
| – | – |
|
|
STKL
3130
PUT
DELISTED
SunOpta
STKL
| $814K | ﹤0.01% |
150,800
+62,800
| +71% | +$369K |
|
3131
CALL
Aramark
ARMK
$15.2B
| $813K | ﹤0.01% |
27,200
-30,300
| -53% | -$983K |
|
|
CNH
3132
CALL
CNH Industrial
CNH
$13.7B
| $813K | ﹤0.01% |
80,300
-230,200
| -74% | -$2.61M |
|
3133
PUT
FuboTV Inc
FUBO
$256M
| $812K | ﹤0.01% |
54,583
+9,058
| +20% | +$145K |
|
3134
PUT
PureCycle Technologies
PCT
$1.2B
| $812K | ﹤0.01% |
137,300
-55,400
| -29% | -$301K |
|
3135
CALL
Westrock Coffee
WEST
$769M
| $812K | ﹤0.01% |
79,400
-120,400
| -60% | -$1.24M |
|
3136
PUT
B&G Foods
BGS
$291M
| $811K | ﹤0.01% |
100,400
+26,700
| +36% | +$263K |
|
3137
Aspen Aerogels
ASPN
$385M
| $810K | ﹤0.01% |
33,974
+29,687
| +692% | +$697K |
|
|
KEEL
3138
Keel Infrastructure Corp
KEEL
$2.45B
| $810K | ﹤0.01% |
315,409
+57,632
| +22% | +$124K |
|
3139
CALL
Allegiant Air
ALGT
$2.66B
| $808K | ﹤0.01% |
16,100
+2,500
| +18% | +$140K |
|
3140
PUT
Carriage Services
CSV
$635M
| $807K | ﹤0.01% |
30,100
+30,000
| +30,000% | +$787K |
|
3141
PUT
Treace Medical Concepts
TMCI
$265M
| $807K | ﹤0.01% |
121,500
+56,800
| +88% | +$459K |
|
3142
PUT
NiSource
NI
$22B
| $806K | ﹤0.01% |
28,000
+3,800
| +16% | +$107K |
|
|
TBCH
3143
CALL
Turtle Beach Corp
TBCH
$245M
| $804K | ﹤0.01% |
56,100
+5,400
| +11% | +$83.9K |
|
3144
PUT
Broadstone Net Lease
BNL
$4.29B
| $803K | ﹤0.01% |
50,600
+5,200
| +11% | +$78.7K |
|
3145
PUT
Children's Place
PLCE
$52.9M
| $803K | ﹤0.01% |
98,700
-39,600
| -29% | -$376K |
|
3146
CALL
Powell Industries
POWL
$7.99B
| $803K | ﹤0.01% |
16,800
-10,800
| -39% | -$563K |
|
3147
Consolidated Edison
ED
$41.1B
| $802K | ﹤0.01% |
8,969
+5,596
| +166% | +$519K |
|
3148
PUT
Group 1 Automotive
GPI
$4.01B
| $802K | ﹤0.01% |
2,700
-500
| -16% | -$148K |
|
3149
PUT
MINISO
MNSO
$3.72B
| $802K | ﹤0.01% |
42,100
-39,100
| -48% | -$862K |
|
3150
Domo
DOMO
$161M
| $801K | ﹤0.01% |
103,875
+73
| +0.1% | +$546 |
|
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.