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 | |
|---|---|---|---|---|---|---|
2126
CALL
HealthEquity
HQY
$7.91B
| $1.63M | ﹤0.01% |
27,700
+5,000
| +22% | +$304K |
|
2127
CALL
SS&C Technologies
SSNC
$17.8B
| $1.63M | ﹤0.01% |
28,800
+27,800
| +2,780% | +$1.6M |
|
|
2128
PUT
SS&C Technologies
SSNC
$17.8B
| $1.63M | ﹤0.01% |
28,800
+24,900
| +638% | +$1.44M |
|
2129
Ambarella
AMBA
$2.99B
| $1.62M | ﹤0.01% |
+20,980
| New | +$1.8M |
|
2130
CALL
Thor Industries
THO
$3.99B
| $1.62M | ﹤0.01% |
20,400
-16,000
| -44% | -$1.41M |
|
2131
CALL
Anterix
ATEX
$1.83B
| $1.62M | ﹤0.01% |
49,100
+37,700
| +331% | +$1.24M |
|
2132
PUT
Kulicke & Soffa
KLIC
$5.3B
| $1.62M | ﹤0.01% |
30,800
+11,300
| +58% | +$588K |
|
2133
Boston Properties
BXP
$11B
| $1.62M | ﹤0.01% |
29,931
-25,124
| -46% | -$1.64M |
|
2134
PUT
Franklin Covey
FC
$233M
| $1.62M | ﹤0.01% |
+42,100
| New | +$1.94M |
|
2135
CALL
JB Hunt Transport Services
JBHT
$27.1B
| $1.61M | ﹤0.01% |
9,200
-9,400
| -51% | -$1.71M |
|
2136
CALL
Omnicom Group
OMC
$22.7B
| $1.61M | ﹤0.01% |
17,100
-14,100
| -45% | -$1.25M |
|
2137
PUT
Macerich
MAC
$7.32B
| $1.61M | ﹤0.01% |
151,700
+25,200
| +20% | +$299K |
|
|
GRMN
2138
PUT
Garmin
GRMN
$46.9B
| $1.6M | ﹤0.01% |
15,900
-10,900
| -41% | -$1.06M |
|
|
CVGW
2139
PUT
DELISTED
Calavo Growers
CVGW
| $1.6M | ﹤0.01% |
55,700
+55,400
| +18,467% | +$1.66M |
|
2140
CALL
Grab
GRAB
$13.5B
| $1.6M | ﹤0.01% |
532,200
-31,900
| -6% | -$106K |
|
2141
Spotify
SPOT
$99.2B
| $1.6M | ﹤0.01% |
11,986
-20,824
| -63% | -$2.38M |
|
2142
XP
XP
$8.62B
| $1.6M | ﹤0.01% |
134,893
+116,514
| +634% | +$1.66M |
|
|
2143
PUT
Grab
GRAB
$13.5B
| $1.6M | ﹤0.01% |
531,600
+289,300
| +119% | +$961K |
|
|
CS
2144
CALL
DELISTED
Credit Suisse Group
CS
| $1.59M | ﹤0.01% |
1,790,100
+198,300
| +12% | +$553K |
|
2145
Markel Group
MKL
$25B
| $1.59M | ﹤0.01% |
1,243
+935
| +304% | +$1.24M |
|
2146
CALL
W.R. Berkley
WRB
$28B
| $1.59M | ﹤0.01% |
38,250
+32,700
| +589% | +$1.46M |
|
|
PBT
2147
PUT
Permian Basin Royalty Trust
PBT
$1.36B
| $1.59M | ﹤0.01% |
65,000
-11,900
| -15% | -$283K |
|
|
RVNC
2148
CALL
DELISTED
Revance Therapeutics, Inc.
RVNC
| $1.58M | ﹤0.01% |
49,200
+3,700
| +8% | +$115K |
|
2149
PUT
Rollins
ROL
$18.6B
| $1.58M | ﹤0.01% |
42,200
+38,300
| +982% | +$1.38M |
|
2150
CALL
Bloomin' Brands
BLMN
$680M
| $1.58M | ﹤0.01% |
61,600
-107,900
| -64% | -$2.68M |
|
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.