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 |
Microsoft
MSFT
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
751
CALL
HP
HPQ
$22.4B
| $11.2M | 0.01% |
448,400
-55,600
| -11% | -$1.71M |
|
752
PUT
Canadian Natural Resources
CNQ
$98B
| $11.2M | 0.01% |
479,800
+148,383
| +45% | +$3.84M |
|
753
CALL
Caesars Entertainment
CZR
$6.09B
| $11.1M | 0.01% |
345,100
-13,700
| -4% | -$596K |
|
754
CALL
EQT Corp
EQT
$33.4B
| $11.1M | 0.01% |
272,400
-207,000
| -43% | -$8.98M |
|
|
EXE
755
CALL
Expand Energy Corp
EXE
$21.9B
| $11.1M | 0.01% |
117,500
-105,400
| -47% | -$9.9M |
|
756
CALL
BILL Holdings
BILL
$4.11B
| $11M | 0.01% |
83,400
+2,800
| +3% | +$402K |
|
|
SWAV
757
CALL
DELISTED
Shockwave Medical, Inc. Common Stock
SWAV
| $11M | 0.01% |
39,700
+4,300
| +12% | +$1.09M |
|
758
PUT
Williams-Sonoma
WSM
$25.7B
| $11M | 0.01% |
186,800
+90,600
| +94% | +$6.43M |
|
759
PUT
Tractor Supply
TSCO
$15.9B
| $11M | 0.01% |
296,000
+188,500
| +175% | +$7.34M |
|
760
PUT
Clorox
CLX
$11.3B
| $11M | 0.01% |
85,700
-46,800
| -35% | -$6.75M |
|
761
PUT
United States Natural Gas Fund
UNG
$473M
| $11M | 0.01% |
117,325
-22,900
| -16% | -$2.51M |
|
762
PUT
Boyd Gaming
BYD
$6.43B
| $11M | 0.01% |
230,100
+145,300
| +171% | +$7.78M |
|
763
CALL
Keysight
KEYS
$55.6B
| $10.9M | 0.01% |
69,500
+7,800
| +13% | +$1.25M |
|
764
CALL
Riot Platforms
RIOT
$9.02B
| $10.9M | 0.01% |
1,548,700
+300,400
| +24% | +$2.11M |
|
765
PUT
Hasbro
HAS
$12.4B
| $10.8M | 0.01% |
160,900
+132,000
| +457% | +$10.4M |
|
766
PUT
Marathon Digital Holdings
MARA
$4.87B
| $10.8M | 0.01% |
1,011,100
+427,600
| +73% | +$5.07M |
|
767
CALL
General Dynamics
GD
$103B
| $10.8M | 0.01% |
51,000
+4,700
| +10% | +$1.06M |
|
768
PUT
Advance Auto Parts
AAP
$3.22B
| $10.8M | 0.01% |
69,200
+43,500
| +169% | +$7.95M |
|
769
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$744M
| $10.8M | 0.01% |
267,600
-138,400
| -34% | -$2.76M |
|
770
PUT
Simon Property Group
SPG
$73B
| $10.8M | 0.01% |
120,100
+25,100
| +26% | +$2.57M |
|
771
CALL
NCR Voyix
VYX
$1.05B
| $10.8M | 0.01% |
921,928
-1,405,549
| -60% | -$25.8M |
|
772
CALL
PACCAR
PCAR
$68.8B
| $10.7M | 0.01% |
192,600
+187,050
| +3,370% | +$10.9M |
|
773
CALL
Paychex
PAYX
$39.4B
| $10.7M | 0.01% |
95,600
-36,000
| -27% | -$4.46M |
|
774
PUT
Generac Holdings
GNRC
$12.4B
| $10.7M | 0.01% |
60,100
+38,300
| +176% | +$8.78M |
|
775
PUT
Centene
CNC
$31.5B
| $10.7M | 0.01% |
137,500
-174,300
| -56% | -$15.6M |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.