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 | |
|---|---|---|---|---|---|---|
|
CPUH
5101
PUT
DELISTED
Compute Health Acquisition Corp.
CPUH
| $105K | ﹤0.01% |
10,300
-17,500
| -63% | -$179K |
|
5102
Core Laboratories
CLB
$477M
| $104K | ﹤0.01% |
4,729
+2,717
| +135% | +$63.6K |
|
|
CPRX
5103
PUT
DELISTED
Catalyst Pharmaceutical
CPRX
| $104K | ﹤0.01% |
6,300
+1,000
| +19% | +$16.5K |
|
5104
PUT
Garrett Motion
GTX
$5.78B
| $104K | ﹤0.01% |
13,700
-40,200
| -75% | -$311K |
|
5105
PUT
Materion
MTRN
$4.33B
| $104K | ﹤0.01% |
+900
| New | +$90.2K |
|
5106
CALL
RPM International
RPM
$13.8B
| $104K | ﹤0.01% |
1,200
+400
| +50% | +$35K |
|
5107
PUT
Vir Biotechnology
VIR
$1.5B
| $104K | ﹤0.01% |
4,500
+200
| +5% | +$5.12K |
|
|
GOLD
5108
PUT
Gold.com Inc
GOLD
$1.22B
| $103K | ﹤0.01% |
3,000
+1,300
| +76% | +$43.2K |
|
5109
CALL
Biohaven
BHVN
$2.08B
| $103K | ﹤0.01% |
7,600
-9,000
| -54% | -$143K |
|
5110
PUT
Blackbaud
BLKB
$1.84B
| $103K | ﹤0.01% |
1,500
+1,100
| +275% | +$65.9K |
|
5111
PUT
Clover Health Investments
CLOV
$2.29B
| $103K | ﹤0.01% |
122,800
+109,700
| +837% | +$120K |
|
5112
PUT
CoStar Group
CSGP
$12B
| $103K | ﹤0.01% |
1,500
-54,300
| -97% | -$4.01M |
|
5113
Evolv Technologies
EVLV
$986M
| $103K | ﹤0.01% |
+33,307
| New | +$95.1K |
|
5114
CALL
NGL Energy Partners
NGL
$2.01B
| $103K | ﹤0.01% |
35,700
-3,300
| -8% | -$7.79K |
|
|
NOAH
5115
Noah Holdings
NOAH
$583M
| $103K | ﹤0.01% |
6,280
-42,497
| -87% | -$788K |
|
5116
CALL
Northwest Bancshares
NWBI
$2.3B
| $103K | ﹤0.01% |
8,600
+6,600
| +330% | +$89.5K |
|
5117
Riot Platforms
RIOT
$8.36B
| $103K | ﹤0.01% |
10,400
-53,577
| -84% | -$348K |
|
5118
PUT
Service Corp International
SCI
$11.8B
| $103K | ﹤0.01% |
1,500
-7,200
| -83% | -$497K |
|
5119
CALL
Utz Brands
UTZ
$1.25B
| $103K | ﹤0.01% |
6,300
-1,400
| -18% | -$23.2K |
|
|
XXII
5120
PUT
22nd Century Group
XXII
$1.34M
| – | – |
0
| – | – |
|
|
LOGC
5121
PUT
DELISTED
ContextLogic
LOGC
| $103K | ﹤0.01% |
7,767
+3,227
| +71% | +$54.9K |
|
|
WE
5122
PUT
DELISTED
WeWork Inc.
WE
| $103K | ﹤0.01% |
3,318
+2,525
| +318% | +$138K |
|
|
PFSW
5123
PUT
DELISTED
PFSweb, Inc.
PFSW
| $103K | ﹤0.01% |
24,300
-1,400
| -5% | -$8.66K |
|
5124
Aehr Test Systems
AEHR
$2.51B
| $102K | ﹤0.01% |
3,314
-70,883
| -96% | -$2.28M |
|
5125
Babcock & Wilcox
BW
$1.41B
| $102K | ﹤0.01% |
16,856
-30,915
| -65% | -$191K |
|
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.