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 | |
|---|---|---|---|---|---|---|
4026
J.M. Smucker
SJM
$13.2B
| $358K | ﹤0.01% |
+3,284
| New | +$372K |
|
4027
CALL
Flywire
FLYW
$2.04B
| $357K | ﹤0.01% |
21,800
-6,400
| -23% | -$121K |
|
4028
CALL
Immersion
IMMR
$254M
| $357K | ﹤0.01% |
38,000
+700
| +2% | +$6.06K |
|
4029
PUT
Methanex
MEOH
$4.12B
| $357K | ﹤0.01% |
7,400
+600
| +9% | +$29.9K |
|
4030
CALL
Arcus Biosciences
RCUS
$3.4B
| $357K | ﹤0.01% |
23,500
-9,700
| -29% | -$157K |
|
4031
PUT
Atlas Energy Solutions
AESI
$1.37B
| $356K | ﹤0.01% |
17,900
-16,800
| -48% | -$375K |
|
4032
Cedar Fair
FUN
$1.91B
| $356K | ﹤0.01% |
+6,551
| New | +$282K |
|
|
BHR
4033
Braemar Hotels & Resorts
BHR
$160M
| $355K | ﹤0.01% |
139,352
+129,427
| +1,304% | +$341K |
|
4034
Braze
BRZE
$2.83B
| $355K | ﹤0.01% |
9,160
+4,324
| +89% | +$173K |
|
4035
CALL
First Trust NASDAQ-100 Technology Index Fund
QTEC
$4.41B
| $355K | ﹤0.01% |
1,800
+1,700
| +1,700% | +$320K |
|
|
RNAM
4036
DELISTED
Avidity Biosciences
RNAM
| $355K | ﹤0.01% |
8,703
-2,303
| -21% | -$66.1K |
|
4037
Fulcrum Therapeutics
FULC
$248M
| $354K | ﹤0.01% |
57,133
+26,394
| +86% | +$200K |
|
4038
Perimeter Solutions
PRM
$5.69B
| $354K | ﹤0.01% |
45,293
-11,521
| -20% | -$86.1K |
|
4039
CALL
Essential Utilities
WTRG
$11.5B
| $354K | ﹤0.01% |
9,500
+3,100
| +48% | +$115K |
|
|
YALA
4040
PUT
Yalla Group
YALA
$824M
| $354K | ﹤0.01% |
77,900
+32,500
| +72% | +$154K |
|
4041
PUT
Nordic American Tanker
NAT
$1.35B
| $353K | ﹤0.01% |
88,700
-65,500
| -42% | -$263K |
|
4042
CALL
VinFast Auto
VFS
$6.95B
| $353K | ﹤0.01% |
82,100
-700
| -0.8% | -$2.73K |
|
4043
PUT
Diodes
DIOD
$3.69B
| $352K | ﹤0.01% |
4,900
+3,700
| +308% | +$265K |
|
4044
PUT
Trimble
TRMB
$13.6B
| $352K | ﹤0.01% |
6,300
-3,900
| -38% | -$225K |
|
4045
CorMedix
CRMD
$577M
| $351K | ﹤0.01% |
81,147
-14,393
| -15% | -$73.1K |
|
4046
PUT
EXL Service
EXLS
$4.66B
| $351K | ﹤0.01% |
11,200
+1,200
| +12% | +$36K |
|
|
NXDR
4047
PUT
Nextdoor Holdings
NXDR
$877M
| $351K | ﹤0.01% |
126,400
+125,000
| +8,929% | +$289K |
|
4048
CALL
ARS Pharmaceuticals
SPRY
$563M
| $351K | ﹤0.01% |
127,600
+52,600
| +70% | +$467K |
|
4049
Global Ship Lease
GSL
$1.57B
| $350K | ﹤0.01% |
+12,191
| New | +$309K |
|
4050
CALL
Houlihan Lokey
HLI
$10.2B
| $350K | ﹤0.01% |
2,600
+1,900
| +271% | +$249K |
|
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.