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 | |
|---|---|---|---|---|---|---|
1076
CALL
Stanley Black & Decker
SWK
$13.6B
| $7.15M | 0.01% |
88,700
+7,600
| +9% | +$640K |
|
1077
CALL
Yum! Brands
YUM
$40.6B
| $7.14M | 0.01% |
54,100
-36,000
| -40% | -$4.63M |
|
1078
CALL
Restaurant Brands International
QSR
$25.1B
| $7.14M | 0.01% |
106,300
-158,500
| -60% | -$10.3M |
|
1079
PUT
NetEase
NTES
$76.9B
| $7.12M | 0.01% |
80,500
-152,500
| -65% | -$13.1M |
|
1080
PUT
Invesco Aerospace & Defense ETF
PPA
$8.22B
| $7.12M | 0.01% |
57,000
-147,400
| -72% | -$11.8M |
|
|
1081
Meta Platforms (Facebook)
META
$1.54T
| $7.1M | 0.01% |
33,500
-287,596
| -90% | -$49M |
|
|
APLS
1082
PUT
DELISTED
Apellis Pharmaceuticals
APLS
| $7.09M | 0.01% |
107,500
+45,700
| +74% | +$2.64M |
|
1083
CALL
PACCAR
PCAR
$68.8B
| $7.09M | 0.01% |
96,850
-103,850
| -52% | -$7.43M |
|
1084
PUT
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$107M
| $7.08M | 0.01% |
240,300
-17,300
| -7% | -$388K |
|
1085
PUT
Zions Bancorporation
ZION
$10.1B
| $7.08M | 0.01% |
236,600
+225,600
| +2,051% | +$10.3M |
|
|
JWN
1086
PUT
DELISTED
Nordstrom
JWN
| $7.07M | 0.01% |
434,600
+147,000
| +51% | +$2.75M |
|
1087
CALL
Yum China
YUMC
$14.8B
| $7.06M | 0.01% |
111,400
+1,700
| +2% | +$103K |
|
1088
CALL
Royalty Pharma
RPRX
$26.2B
| $7.05M | 0.01% |
195,600
+95,700
| +96% | +$3.55M |
|
1089
PUT
Hilton Worldwide
HLT
$72.9B
| $7.03M | 0.01% |
49,900
-108,000
| -68% | -$15.2M |
|
1090
CALL
NovoCure
NVCR
$2.32B
| $7.02M | 0.01% |
116,800
+70,500
| +152% | +$5.63M |
|
1091
CALL
Progressive
PGR
$120B
| $7.01M | 0.01% |
49,000
-3,100
| -6% | -$427K |
|
1092
CALL
Williams Companies
WMB
$92B
| $7M | 0.01% |
234,300
+112,400
| +92% | +$3.47M |
|
1093
PUT
CBRE Group
CBRE
$39.7B
| $6.97M | 0.01% |
95,700
+95,600
| +95,600% | +$7.81M |
|
|
RETA
1094
PUT
DELISTED
Reata Pharmaceuticals, Inc. Class A Common Stock
RETA
| $6.96M | 0.01% |
76,600
+65,000
| +560% | +$3.81M |
|
1095
CALL
Pool Corp
POOL
$6.68B
| $6.95M | 0.01% |
20,300
+19,500
| +2,438% | +$6.92M |
|
1096
CALL
Harley-Davidson
HOG
$2.79B
| $6.92M | 0.01% |
182,200
+105,400
| +137% | +$4.63M |
|
1097
CALL
Qualys
QLYS
$4.71B
| $6.92M | 0.01% |
53,200
+26,400
| +99% | +$3.09M |
|
1098
PUT
Alaska Air
ALK
$4.99B
| $6.91M | 0.01% |
164,700
+134,300
| +442% | +$6.3M |
|
1099
CALL
Alpha Metallurgical Resources
AMR
$1.82B
| $6.91M | 0.01% |
44,300
+26,100
| +143% | +$4.18M |
|
1100
PUT
GitLab
GTLB
$5.1B
| $6.88M | 0.01% |
200,800
+79,200
| +65% | +$3.48M |
|
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.