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 | |
|---|---|---|---|---|---|---|
151
CALL
First Solar
FSLR
$22.1B
| $105M | 0.09% |
481,400
+45,000
| +10% | +$8.22M |
|
152
CALL
Lam Research
LRCX
$403B
| $104M | 0.09% |
1,963,000
+185,000
| +10% | +$9.08M |
|
153
CALL
ConocoPhillips
COP
$143B
| $104M | 0.09% |
1,046,800
+81,900
| +8% | +$8.96M |
|
154
CALL
Applied Materials
AMAT
$448B
| $102M | 0.09% |
832,600
-83,600
| -9% | -$9.6M |
|
155
CALL
Wynn Resorts
WYNN
$9.82B
| $102M | 0.09% |
909,300
+453,600
| +100% | +$47.4M |
|
156
CALL
CrowdStrike
CRWD
$195B
| $101M | 0.09% |
2,931,600
-1,461,600
| -33% | -$42.3M |
|
157
PUT
Verizon
VZ
$183B
| $101M | 0.09% |
2,586,100
-316,200
| -11% | -$12.5M |
|
158
CALL
Palo Alto Networks
PANW
$279B
| $100M | 0.09% |
1,001,000
-121,000
| -11% | -$10.3M |
|
|
159
PUT
Wynn Resorts
WYNN
$9.82B
| $100M | 0.09% |
893,200
+142,000
| +19% | +$14.9M |
|
160
CALL
McDonald's
MCD
$188B
| $99M | 0.09% |
354,000
+46,900
| +15% | +$12.6M |
|
161
CALL
Texas Instruments
TXN
$265B
| $98.8M | 0.09% |
531,100
+156,600
| +42% | +$27.5M |
|
162
CALL
ARK Space & Defense Innovation ETF
ARKX
$823M
| $98M | 0.09% |
2,461,200
-665,300
| -21% | -$9.09M |
|
163
CALL
FedEx
FDX
$73.1B
| $97.9M | 0.09% |
428,500
+123,000
| +40% | +$25M |
|
164
CALL
Wells Fargo
WFC
$266B
| $96.6M | 0.08% |
2,585,600
+799,900
| +45% | +$34.9M |
|
165
PUT
Ulta Beauty
ULTA
$21B
| $96.5M | 0.08% |
176,900
+11,400
| +7% | +$5.85M |
|
166
PUT
Freeport-McMoran
FCX
$89.9B
| $96.3M | 0.08% |
2,354,800
-533,900
| -18% | -$22.2M |
|
167
PUT
United Airlines
UAL
$38.2B
| $95.4M | 0.08% |
2,156,700
+590,500
| +38% | +$28.3M |
|
168
PUT
American Airlines Group
AAL
$10.1B
| $94M | 0.08% |
6,371,100
-182,100
| -3% | -$2.84M |
|
169
CALL
Enphase Energy
ENPH
$5.26B
| $93.1M | 0.08% |
442,800
+169,600
| +62% | +$36.7M |
|
170
PUT
AbbVie
ABBV
$452B
| $91.5M | 0.08% |
574,400
-407,000
| -41% | -$62.2M |
|
171
CALL
Lowe's Companies
LOW
$114B
| $91.3M | 0.08% |
456,600
-119,900
| -21% | -$24.4M |
|
172
PUT
Albemarle
ALB
$14B
| $89.8M | 0.08% |
406,300
+159,400
| +65% | +$39.3M |
|
173
CALL
General Motors
GM
$71.7B
| $89.6M | 0.08% |
2,442,400
+386,900
| +19% | +$14.6M |
|
174
PUT
Uber
UBER
$146B
| $88.5M | 0.08% |
2,792,100
-618,800
| -18% | -$19.6M |
|
175
PUT
Morgan Stanley
MS
$340B
| $87.8M | 0.08% |
1,000,300
-148,800
| -13% | -$13.9M |
|
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.