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 | |
|---|---|---|---|---|---|---|
826
CALL
SentinelOne
S
$5.96B
| $13.4M | 0.01% |
635,100
-410,700
| -39% | -$8.43M |
|
|
TYNS
827
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $13.3M | 0.01% |
131,800
+21,600
| +20% | +$2.19M |
|
828
CALL
Biogen
BIIB
$29.6B
| $13.3M | 0.01% |
57,500
-26,900
| -32% | -$5.85M |
|
829
PUT
Johnson Controls International
JCI
$87.4B
| $13.3M | 0.01% |
200,500
-600
| -0.3% | -$40.4K |
|
830
PUT
Viking Therapeutics
VKTX
$4.11B
| $13.3M | 0.01% |
251,400
-143,900
| -36% | -$9.43M |
|
831
CALL
Electronic Arts
EA
$52.4B
| $13.3M | 0.01% |
95,400
-36,300
| -28% | -$4.78M |
|
832
CALL
Canadian Natural Resources
CNQ
$98B
| $13.3M | 0.01% |
373,200
-105,400
| -22% | -$3.97M |
|
833
Direxion Daily Financial Bull 3x ETF
FAS
$2.35B
| $13.3M | 0.01% |
131,390
+2,526
| +2% | +$259K |
|
834
CALL
Coherent
COHR
$61.3B
| $13.3M | 0.01% |
183,000
-25,300
| -12% | -$1.52M |
|
|
CYBR
835
PUT
DELISTED
CyberArk
CYBR
| $13.3M | 0.01% |
48,500
+13,200
| +37% | +$3.24M |
|
836
PUT
PENN Entertainment
PENN
$2.71B
| $13.2M | 0.01% |
684,100
+395,300
| +137% | +$6.71M |
|
837
CALL
Halliburton
HAL
$27.3B
| $13.2M | 0.01% |
415,400
+8,000
| +2% | +$295K |
|
838
CALL
Novartis
NVS
$297B
| $13.2M | 0.01% |
128,500
+11,400
| +10% | +$1.14M |
|
839
CALL
KKR & Co
KKR
$86.2B
| $13.2M | 0.01% |
125,700
+18,400
| +17% | +$1.87M |
|
840
PUT
Builders FirstSource
BLDR
$7.59B
| $13.2M | 0.01% |
95,400
-10,000
| -9% | -$1.7M |
|
|
FISV
841
PUT
Fiserv Inc
FISV
$26.6B
| $13.2M | 0.01% |
88,600
+41,700
| +89% | +$6.31M |
|
842
CALL
HCA Healthcare
HCA
$83.5B
| $13.2M | 0.01% |
41,100
-29,500
| -42% | -$9.59M |
|
843
PUT
Duke Energy
DUK
$101B
| $13.2M | 0.01% |
131,400
-700
| -0.5% | -$70K |
|
844
PUT
Fox Class B
FOX
$20.7B
| $13.2M | 0.01% |
383,300
-1,200
| -0.3% | -$36.3K |
|
845
CALL
Toast
TOST
$16.5B
| $13.2M | 0.01% |
510,400
-131,800
| -21% | -$3.19M |
|
846
CALL
Kimberly-Clark
KMB
$35.6B
| $13.1M | 0.01% |
94,900
-28,100
| -23% | -$3.75M |
|
|
CFLT
847
CALL
DELISTED
Confluent
CFLT
| $13.1M | 0.01% |
444,100
-336,500
| -43% | -$9.67M |
|
848
CALL
Celestica
CLS
$38.5B
| $13.1M | 0.01% |
228,500
-71,200
| -24% | -$3.59M |
|
849
PUT
CSX Corp
CSX
$98.1B
| $13.1M | 0.01% |
391,200
+223,000
| +133% | +$7.57M |
|
850
CALL
Quanta Services
PWR
$98.1B
| $13.1M | 0.01% |
51,400
-10,900
| -17% | -$2.89M |
|
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.