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 | |
|---|---|---|---|---|---|---|
3326
CALL
Gran Tierra Energy
GTE
$238M
| $472K | ﹤0.01% |
53,800
+1,670
| +3% | +$14.4K |
|
3327
CALL
Live Oak Bancshares
LOB
$1.95B
| $472K | ﹤0.01% |
19,400
+19,200
| +9,600% | +$602K |
|
3328
CALL
Teekay Tankers
TNK
$2.63B
| $472K | ﹤0.01% |
11,000
+3,300
| +43% | +$122K |
|
3329
PUT
Xcel Energy
XEL
$50.4B
| $472K | ﹤0.01% |
7,000
-600
| -8% | -$40.5K |
|
|
CIVI
3330
CALL
DELISTED
Civitas Resources
CIVI
| $471K | ﹤0.01% |
6,900
+2,900
| +73% | +$188K |
|
3331
Kornit Digital
KRNT
$713M
| $471K | ﹤0.01% |
24,378
-38,489
| -61% | -$868K |
|
3332
PUT
PagSeguro Digital
PAGS
$2.62B
| $471K | ﹤0.01% |
55,000
+7,300
| +15% | +$65.3K |
|
|
DSKE
3333
CALL
DELISTED
Daseke, Inc. Common Stock
DSKE
| $470K | ﹤0.01% |
+60,900
| New | +$447K |
|
3334
PUT
Delek Logistics
DKL
$3.03B
| $469K | ﹤0.01% |
9,900
-600
| -6% | -$29.3K |
|
3335
PUT
OneSpan
OSPN
$562M
| $469K | ﹤0.01% |
+26,800
| New | +$401K |
|
3336
US Commodity Index
USCI
$365M
| $468K | ﹤0.01% |
8,641
+7,396
| +594% | +$403K |
|
3337
Copart
CPRT
$27.6B
| $467K | ﹤0.01% |
12,424
-9,442
| -43% | -$321K |
|
3338
CALL
Clover Health Investments
CLOV
$2.25B
| $466K | ﹤0.01% |
552,100
-14,800
| -3% | -$16.2K |
|
3339
EVgo
EVGO
$220M
| $466K | ﹤0.01% |
59,842
+38,021
| +174% | +$224K |
|
|
SPTN
3340
CALL
DELISTED
SpartanNash
SPTN
| $466K | ﹤0.01% |
18,800
+9,500
| +102% | +$274K |
|
3341
PUT
LendingTree
TREE
$564M
| $466K | ﹤0.01% |
17,500
-12,600
| -42% | -$413K |
|
3342
Trinity Industries
TRN
$2.95B
| $466K | ﹤0.01% |
19,135
+1,913
| +11% | +$50.8K |
|
|
ETRN
3343
DELISTED
Equitrans Midstream Corporation Common Stock
ETRN
| $466K | ﹤0.01% |
80,625
+21,598
| +37% | +$138K |
|
3344
PUT
Aspen Aerogels
ASPN
$385M
| $465K | ﹤0.01% |
62,500
+10,400
| +20% | +$103K |
|
3345
Bio-Rad Laboratories Class A
BIO
$8.47B
| $465K | ﹤0.01% |
971
+230
| +31% | +$108K |
|
3346
CALL
Innoviz Technologies
INVZ
$139M
| $464K | ﹤0.01% |
132,700
+12,600
| +10% | +$55.8K |
|
3347
PUT
Nordic American Tanker
NAT
$1.37B
| $464K | ﹤0.01% |
117,300
-151,700
| -56% | -$544K |
|
3348
PUT
Northern Oil and Gas
NOG
$2.21B
| $464K | ﹤0.01% |
15,300
-5,100
| -25% | -$159K |
|
3349
Quest Diagnostics
DGX
$25.6B
| $462K | ﹤0.01% |
+3,271
| New | +$468K |
|
3350
CALL
MarineMax
HZO
$799M
| $462K | ﹤0.01% |
16,100
+9,000
| +127% | +$283K |
|
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.