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 | |
|---|---|---|---|---|---|---|
1226
PUT
Travelers Companies
TRV
$80.5B
| $5.66M | 0.01% |
33,000
-33,700
| -51% | -$6.13M |
|
1227
CALL
Paycom
PAYC
$6.72B
| $5.65M | 0.01% |
18,600
+7,000
| +60% | +$2.11M |
|
1228
CALL
Synopsys
SNPS
$70.7B
| $5.64M | 0.01% |
14,600
-2,600
| -15% | -$929K |
|
|
CMA
1229
CALL
DELISTED
Comerica
CMA
| $5.62M | ﹤0.01% |
129,400
+97,800
| +309% | +$6.27M |
|
1230
PUT
Goodyear
GT
$2.04B
| $5.62M | ﹤0.01% |
509,700
+75,500
| +17% | +$837K |
|
1231
PUT
PBF Energy
PBF
$7.42B
| $5.61M | ﹤0.01% |
129,400
+41,500
| +47% | +$1.75M |
|
|
WCC
1232
PUT
WESCO International
WCC
$15.9B
| $5.61M | ﹤0.01% |
36,300
+30,500
| +526% | +$4.57M |
|
1233
CALL
MP Materials
MP
$7.55B
| $5.59M | ﹤0.01% |
198,400
-142,900
| -42% | -$4.32M |
|
1234
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $5.59M | ﹤0.01% |
79,694
+14,821
| +23% | +$1.04M |
|
1235
CALL
International Paper
IP
$20.1B
| $5.59M | ﹤0.01% |
155,000
+36,700
| +31% | +$1.36M |
|
1236
PUT
AerCap
AER
$24B
| $5.58M | ﹤0.01% |
99,300
+73,900
| +291% | +$4.42M |
|
1237
CALL
Planet Fitness
PLNT
$4.32B
| $5.57M | ﹤0.01% |
71,700
+58,500
| +443% | +$4.67M |
|
1238
CALL
Amylyx Pharmaceuticals
AMLX
$1.94B
| $5.55M | ﹤0.01% |
189,300
+169,200
| +842% | +$5.88M |
|
1239
PUT
Nasdaq
NDAQ
$52B
| $5.55M | ﹤0.01% |
101,600
-31,300
| -24% | -$1.81M |
|
1240
PUT
Canadian Imperial Bank of Commerce
CM
$107B
| $5.55M | ﹤0.01% |
130,900
+28,100
| +27% | +$1.23M |
|
1241
CALL
Lithia Motors
LAD
$7.69B
| $5.54M | ﹤0.01% |
24,200
+23,000
| +1,917% | +$5.59M |
|
1242
CALL
KE Holdings
BEKE
$16.9B
| $5.52M | ﹤0.01% |
292,900
-114,300
| -28% | -$2.12M |
|
1243
PUT
Bunge Global
BG
$23.9B
| $5.5M | ﹤0.01% |
57,600
+12,200
| +27% | +$1.19M |
|
|
AYX
1244
PUT
DELISTED
Alteryx Inc
AYX
| $5.5M | ﹤0.01% |
93,400
+70,000
| +299% | +$4.08M |
|
1245
PUT
Tenet Healthcare
THC
$20.8B
| $5.45M | ﹤0.01% |
91,800
+68,000
| +286% | +$3.78M |
|
1246
iShares Biotechnology ETF
IBB
$9.33B
| $5.45M | ﹤0.01% |
+42,162
| New | +$5.52M |
|
|
VMW
1247
CALL
DELISTED
VMware, Inc
VMW
| $5.43M | ﹤0.01% |
43,500
+11,900
| +38% | +$1.43M |
|
|
1248
PUT
KE Holdings
BEKE
$16.9B
| $5.42M | ﹤0.01% |
287,800
-588,900
| -67% | -$10.9M |
|
1249
CALL
Envista
NVST
$4.27B
| $5.4M | ﹤0.01% |
132,100
+64,900
| +97% | +$2.47M |
|
1250
PUT
Trip.com Group
TCOM
$27.5B
| $5.4M | ﹤0.01% |
143,300
-128,300
| -47% | -$4.77M |
|
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.