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 | |
|---|---|---|---|---|---|---|
576
PUT
Dow Inc
DOW
$22.5B
| $21.9M | 0.01% |
413,100
+166,200
| +67% | +$9.5M |
|
577
ASML
ASML
$692B
| $21.9M | 0.01% |
21,402
+14,368
| +204% | +$13.8M |
|
578
PUT
SoFi Technologies
SOFI
$21.9B
| $21.8M | 0.01% |
3,303,500
-94,100
| -3% | -$664K |
|
579
Coinbase
COIN
$43.8B
| $21.7M | 0.01% |
+97,709
| New | +$22.5M |
|
580
PUT
Alnylam Pharmaceuticals
ALNY
$35.6B
| $21.7M | 0.01% |
89,300
+21,900
| +32% | +$3.46M |
|
581
PUT
Sarepta Therapeutics
SRPT
$1.67B
| $21.6M | 0.01% |
137,000
+23,000
| +20% | +$2.95M |
|
582
CALL
Caesars Entertainment
CZR
$6.1B
| $21.6M | 0.01% |
543,200
+97,900
| +22% | +$3.68M |
|
583
CALL
Truist Financial
TFC
$63.2B
| $21.6M | 0.01% |
555,100
-91,900
| -14% | -$3.47M |
|
|
584
CALL
Alnylam Pharmaceuticals
ALNY
$35.6B
| $21.5M | 0.01% |
88,400
-64,800
| -42% | -$10.2M |
|
585
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$747M
| $21.4M | 0.01% |
539,400
-180,300
| -25% | -$3.79M |
|
586
CALL
Atlassian
TEAM
$21.7B
| $21.4M | 0.01% |
120,800
+11,100
| +10% | +$1.98M |
|
|
GAP
587
CALL
The Gap Inc
GAP
$7.07B
| $21.1M | 0.01% |
882,500
-34,300
| -4% | -$798K |
|
588
CALL
Riot Platforms
RIOT
$8.84B
| $21M | 0.01% |
2,298,400
-190,000
| -8% | -$1.92M |
|
589
CALL
Bilibili
BILI
$7.4B
| $21M | 0.01% |
1,360,500
+416,900
| +44% | +$5.81M |
|
590
CALL
Li Auto
LI
$12B
| $20.9M | 0.01% |
1,169,100
-393,600
| -25% | -$9.5M |
|
591
PUT
Lyft
LYFT
$5.57B
| $20.9M | 0.01% |
1,481,900
+189,000
| +15% | +$3.07M |
|
592
CALL
UiPath
PATH
$5.54B
| $20.8M | 0.01% |
1,642,900
-123,000
| -7% | -$2.13M |
|
593
CALL
Crown Castle
CCI
$33.8B
| $20.8M | 0.01% |
213,200
+5,300
| +3% | +$522K |
|
594
CALL
Honeywell
HON
$73.8B
| $20.8M | 0.01% |
103,448
-22,917
| -18% | -$4.36M |
|
595
PUT
Vertex Pharmaceuticals
VRTX
$120B
| $20.8M | 0.01% |
44,300
-4,500
| -9% | -$1.95M |
|
596
PUT
monday.com
MNDY
$3.12B
| $20.8M | 0.01% |
86,200
+55,600
| +182% | +$11.7M |
|
597
CALL
Prudential Financial
PRU
$41.3B
| $20.7M | 0.01% |
176,600
-16,600
| -9% | -$1.92M |
|
598
PUT
Agnico Eagle Mines
AEM
$73.5B
| $20.6M | 0.01% |
315,000
-86,200
| -21% | -$5.62M |
|
599
CALL
Duke Energy
DUK
$99.7B
| $20.6M | 0.01% |
205,300
-167,700
| -45% | -$16.8M |
|
600
PUT
Petrobras
PBR
$122B
| $20.6M | 0.01% |
1,419,500
-48,700
| -3% | -$758K |
|
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.