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 | |
|---|---|---|---|---|---|---|
3226
PUT
Vanguard S&P 500 Growth ETF
VOOG
$25.3B
| $752K | ﹤0.01% |
14,400
+1,800
| +14% | +$93.3K |
|
3227
CALL
Ametek
AME
$55.7B
| $750K | ﹤0.01% |
4,500
+4,400
| +4,400% | +$760K |
|
|
JKS
3228
CALL
JinkoSolar
JKS
$799M
| $750K | ﹤0.01% |
36,200
-12,000
| -25% | -$296K |
|
3229
PUT
Establishment Labs
ESTA
$2.71B
| $749K | ﹤0.01% |
16,500
-68,000
| -80% | -$3.45M |
|
3230
American Superconductor
AMSC
$1.48B
| $748K | ﹤0.01% |
32,021
-21,641
| -40% | -$357K |
|
3231
CALL
Brixmor Property Group
BRX
$9.93B
| $748K | ﹤0.01% |
32,400
+23,800
| +277% | +$526K |
|
3232
Huntington Ingalls Industries
HII
$11.4B
| $746K | ﹤0.01% |
+3,030
| New | +$788K |
|
3233
PUT
Tandem Diabetes Care
TNDM
$1.18B
| $745K | ﹤0.01% |
18,500
+10,900
| +143% | +$455K |
|
3234
Hexcel
HXL
$8.28B
| $744K | ﹤0.01% |
11,920
+8,867
| +290% | +$595K |
|
|
CVSA
3235
PUT
Covista Inc
CVSA
$4.09B
| $743K | ﹤0.01% |
10,900
-5,600
| -34% | -$329K |
|
3236
PUT
United Natural Foods
UNFI
$2.97B
| $742K | ﹤0.01% |
56,700
+20,100
| +55% | +$226K |
|
3237
PUT
UWM Holdings
UWMC
$624M
| $742K | ﹤0.01% |
107,200
+17,200
| +19% | +$118K |
|
3238
CALL
ZTO Express
ZTO
$18.1B
| $742K | ﹤0.01% |
35,800
+12,000
| +50% | +$262K |
|
3239
CALL
Integer Holdings
ITGR
$3.38B
| $741K | ﹤0.01% |
6,400
| – | – |
|
|
FOLD
3240
DELISTED
Amicus Therapeutics
FOLD
| $739K | ﹤0.01% |
74,595
+49,610
| +199% | +$509K |
|
3241
CALL
BRC Group Holdings
RILY
$273M
| $739K | ﹤0.01% |
41,900
-270,200
| -87% | -$6.95M |
|
3242
Wendy's
WEN
$1.39B
| $739K | ﹤0.01% |
+43,594
| New | +$792K |
|
3243
Deere & Co
DE
$169B
| $738K | ﹤0.01% |
1,976
-10,018
| -84% | -$3.91M |
|
|
SILV
3244
CALL
DELISTED
SilverCrest Metals Inc. Common Shares
SILV
| $738K | ﹤0.01% |
90,600
-179,700
| -66% | -$1.47M |
|
3245
PUT
STAG Industrial
STAG
$7.77B
| $735K | ﹤0.01% |
20,400
+19,000
| +1,357% | +$676K |
|
3246
CALL
Arlo Technologies
ARLO
$1.51B
| $732K | ﹤0.01% |
56,200
+16,000
| +40% | +$199K |
|
3247
Shell
SHEL
$239B
| $732K | ﹤0.01% |
+10,143
| New | +$725K |
|
3248
PUT
Principal Financial Group
PFG
$24B
| $729K | ﹤0.01% |
9,300
+2,400
| +35% | +$195K |
|
3249
Sociedad Química y Minera de Chile
SQM
$19.6B
| $729K | ﹤0.01% |
17,901
+15,785
| +746% | +$729K |
|
|
PENG
3250
PUT
Penguin Solutions Inc
PENG
$2.69B
| $729K | ﹤0.01% |
31,900
+27,800
| +678% | +$579K |
|
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.