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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
101
PUT
Qualcomm
QCOM
$183B
| $146M | 0.13% |
1,145,000
-104,700
| -8% | -$13M |
|
102
CALL
Airbnb
ABNB
$85.5B
| $145M | 0.13% |
1,161,800
+40,300
| +4% | +$4.6M |
|
103
PUT
Snowflake
SNOW
$94.2B
| $142M | 0.12% |
920,500
+286,900
| +45% | +$42.1M |
|
104
PUT
Chipotle Mexican Grill
CMG
$42.7B
| $141M | 0.12% |
4,140,000
+2,875,000
| +227% | +$90.3M |
|
105
PUT
ASML
ASML
$692B
| $139M | 0.12% |
204,000
+77,200
| +61% | +$49.6M |
|
|
106
PUT
Airbnb
ABNB
$85.5B
| $138M | 0.12% |
1,108,000
+88,400
| +9% | +$10.1M |
|
|
KFYP
107
CALL
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $137M | 0.12% |
4,387,300
-1,090,000
| -20% | -$26M |
|
108
PUT
Micron Technology
MU
$1.1T
| $136M | 0.12% |
2,261,600
-733,700
| -24% | -$43M |
|
109
CALL
iShares MSCI Australia ETF
EWA
$1.34B
| $136M | 0.12% |
4,827,500
+1,699,800
| +54% | +$39.8M |
|
110
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $135M | 0.12% |
437,300
-44,800
| -9% | -$13.8M |
|
111
CALL
Morgan Stanley
MS
$340B
| $134M | 0.12% |
1,522,900
+137,500
| +10% | +$12.8M |
|
112
PUT
ARK Space & Defense Innovation ETF
ARKX
$823M
| $133M | 0.12% |
3,321,800
+1,380,200
| +71% | +$18.9M |
|
113
PUT
Pinduoduo
PDD
$121B
| $133M | 0.12% |
1,750,700
+841,800
| +93% | +$76.1M |
|
114
PUT
Caterpillar
CAT
$410B
| $133M | 0.12% |
580,500
-441,600
| -43% | -$107M |
|
115
PUT
Applied Materials
AMAT
$448B
| $133M | 0.12% |
1,080,600
+157,900
| +17% | +$18.1M |
|
|
116
CALL
Qualcomm
QCOM
$183B
| $132M | 0.12% |
1,035,400
-431,700
| -29% | -$53.7M |
|
117
CALL
Occidental Petroleum
OXY
$56.2B
| $132M | 0.12% |
2,114,600
-4,600
| -0.2% | -$286K |
|
118
CALL
Uber
UBER
$146B
| $130M | 0.11% |
4,114,500
+305,600
| +8% | +$9.69M |
|
|
KFYP
119
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $130M | 0.11% |
4,154,700
+562,000
| +16% | +$13.4M |
|
|
120
CALL
Micron Technology
MU
$1.1T
| $129M | 0.11% |
2,138,800
+205,300
| +11% | +$12M |
|
|
121
CALL
Caterpillar
CAT
$410B
| $129M | 0.11% |
563,200
+34,200
| +6% | +$8.27M |
|
|
122
CALL
Chipotle Mexican Grill
CMG
$42.7B
| $128M | 0.11% |
3,745,000
+1,055,000
| +39% | +$33.2M |
|
123
CALL
Coca-Cola
KO
$353B
| $127M | 0.11% |
2,051,700
-96,100
| -4% | -$5.82M |
|
|
124
PUT
iShares MSCI Australia ETF
EWA
$1.34B
| $126M | 0.11% |
4,337,700
+908,900
| +27% | +$21.3M |
|
125
PUT
Enphase Energy
ENPH
$5.26B
| $125M | 0.11% |
593,200
+140,000
| +31% | +$30.3M |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.