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 | |
|---|---|---|---|---|---|---|
1126
CALL
Cenovus Energy
CVE
$55.4B
| $6.61M | 0.01% |
378,300
-171,500
| -31% | -$3.15M |
|
|
FSR
1127
CALL
DELISTED
Fisker Inc.
FSR
| $6.6M | 0.01% |
1,075,000
+155,400
| +17% | +$1.07M |
|
1128
Nice
NICE
$5.09B
| $6.58M | 0.01% |
28,749
+20,975
| +270% | +$4.4M |
|
1129
PUT
Baxter International
BAX
$11.2B
| $6.57M | 0.01% |
161,900
+50,900
| +46% | +$2.16M |
|
|
JWN
1130
CALL
DELISTED
Nordstrom
JWN
| $6.56M | 0.01% |
403,400
-32,700
| -7% | -$611K |
|
1131
CALL
Veeva Systems
VEEV
$29.2B
| $6.56M | 0.01% |
35,700
-90,600
| -72% | -$15.5M |
|
1132
Align Technology
ALGN
$12B
| $6.56M | 0.01% |
19,632
-3,774
| -16% | -$1.11M |
|
1133
PUT
Centene
CNC
$31.5B
| $6.55M | 0.01% |
103,600
-83,500
| -45% | -$5.93M |
|
1134
PUT
New Oriental
EDU
$7.85B
| $6.54M | 0.01% |
169,500
-447,400
| -73% | -$18.1M |
|
|
OSH
1135
CALL
DELISTED
Oak Street Health, Inc.
OSH
| $6.53M | 0.01% |
168,900
+32,300
| +24% | +$1.04M |
|
1136
CALL
West Pharmaceutical
WST
$25B
| $6.51M | 0.01% |
18,800
+14,800
| +370% | +$4.32M |
|
1137
CALL
Toll Brothers
TOL
$13.7B
| $6.5M | 0.01% |
108,300
-9,700
| -8% | -$559K |
|
1138
PUT
ScottsMiracle-Gro
SMG
$3.93B
| $6.49M | 0.01% |
93,100
+42,200
| +83% | +$3.04M |
|
1139
Direxion Daily S&P 500 Bear 3x ETF
SPXS
$332M
| $6.47M | 0.01% |
+36,527
| New | +$7.16M |
|
|
DM
1140
PUT
DELISTED
Desktop Metal, Inc.
DM
| $6.46M | 0.01% |
280,690
+187,140
| +200% | +$3.53M |
|
1141
CALL
Ascendis Pharma A/S
ASND
$16.6B
| $6.43M | 0.01% |
60,000
+50,100
| +506% | +$5.73M |
|
1142
CALL
Diageo
DEO
$45.7B
| $6.41M | 0.01% |
35,400
+18,100
| +105% | +$3.19M |
|
|
UCD
1143
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $6.4M | 0.01% |
119,800
-142,000
| -54% | -$7.59M |
|
1144
PUT
Cognizant
CTSH
$20.3B
| $6.39M | 0.01% |
104,900
+34,800
| +50% | +$2.18M |
|
1145
Burlington
BURL
$21.4B
| $6.38M | 0.01% |
+31,565
| New | +$6.9M |
|
1146
PUT
Synopsys
SNPS
$71.5B
| $6.37M | 0.01% |
16,500
+2,000
| +14% | +$715K |
|
1147
iShares Select Dividend ETF
DVY
$23.6B
| $6.37M | 0.01% |
54,350
+13,465
| +33% | +$1.63M |
|
1148
NIO
NIO
$11.6B
| $6.36M | 0.01% |
604,982
+596,043
| +6,668% | +$6.09M |
|
1149
PUT
Under Armour Class C
UA
$2.81B
| $6.35M | 0.01% |
676,900
+452,800
| +202% | +$4.16M |
|
|
FTCH
1150
PUT
DELISTED
Farfetch Limited Class A Ordinary Shares
FTCH
| $6.35M | 0.01% |
1,294,100
+1,006,500
| +350% | +$5.46M |
|
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.