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 | |
|---|---|---|---|---|---|---|
4626
PUT
MaxLinear
MXL
$5.19B
| $205K | ﹤0.01% |
10,200
+6,100
| +149% | +$120K |
|
4627
CALL
Oaktree Specialty Lending
OCSL
$1.05B
| $205K | ﹤0.01% |
+10,900
| New | +$211K |
|
4628
PUT
Badger Meter
BMI
$3.87B
| $204K | ﹤0.01% |
1,100
+300
| +38% | +$54.8K |
|
4629
Enova International
ENVA
$6.09B
| $204K | ﹤0.01% |
+3,282
| New | +$200K |
|
4630
CALL
National Beverage
FIZZ
$3.06B
| $204K | ﹤0.01% |
4,000
+2,400
| +150% | +$112K |
|
4631
Alliant Energy
LNT
$18.6B
| $204K | ﹤0.01% |
4,015
+1,630
| +68% | +$81.9K |
|
|
NUVL
4632
CALL
DELISTED
Nuvalent
NUVL
| $204K | ﹤0.01% |
2,700
+2,200
| +440% | +$156K |
|
4633
Radian Group
RDN
$5.28B
| $204K | ﹤0.01% |
6,587
-35,658
| -84% | -$1.1M |
|
|
BIG
4634
CALL
DELISTED
Big Lots, Inc.
BIG
| $204K | ﹤0.01% |
118,400
-52,400
| -31% | -$169K |
|
4635
CALL
Appian
APPN
$2.11B
| $203K | ﹤0.01% |
6,600
-38,800
| -85% | -$1.27M |
|
|
ESPR
4636
DELISTED
Esperion Therapeutics
ESPR
| $203K | ﹤0.01% |
+91,844
| New | +$216K |
|
4637
PUT
Indivior Pharmaceuticals
INDV
$4.74B
| $203K | ﹤0.01% |
+12,600
| New | +$227K |
|
4638
CALL
Lamar Advertising Co
LAMR
$16.7B
| $203K | ﹤0.01% |
1,700
-12,800
| -88% | -$1.49M |
|
4639
ASE Group
ASX
$68.3B
| $202K | ﹤0.01% |
+17,709
| New | +$192K |
|
4640
Builders FirstSource
BLDR
$7.29B
| $202K | ﹤0.01% |
1,465
+667
| +84% | +$113K |
|
4641
CALL
Methanex
MEOH
$4.23B
| $202K | ﹤0.01% |
4,200
-3,600
| -46% | -$179K |
|
4642
MINISO
MNSO
$3.88B
| $202K | ﹤0.01% |
10,604
+4,804
| +83% | +$106K |
|
4643
Ocugen
OCGN
$403M
| $202K | ﹤0.01% |
130,462
-56,095
| -30% | -$87.4K |
|
4644
CALL
Universal Corp
UVV
$1.37B
| $202K | ﹤0.01% |
4,200
+1,700
| +68% | +$84.8K |
|
4645
CALL
International Seaways
INSW
$4.68B
| $201K | ﹤0.01% |
3,400
-5,900
| -63% | -$344K |
|
|
DFTX
4646
PUT
Definium Therapeutics
DFTX
$5.6B
| $201K | ﹤0.01% |
27,900
-19,600
| -41% | -$171K |
|
4647
CALL
Canadian National Railway
CNI
$78.5B
| $200K | ﹤0.01% |
1,700
-700
| -29% | -$87.7K |
|
4648
First Financial Bankshares
FFIN
$5.05B
| $200K | ﹤0.01% |
+6,790
| New | +$203K |
|
4649
PUT
MiMedx Group
MDXG
$630M
| $200K | ﹤0.01% |
29,000
+16,900
| +140% | +$119K |
|
4650
NatWest
NWG
$69.9B
| $200K | ﹤0.01% |
24,913
+23,481
| +1,640% | +$182K |
|
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.