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 | |
|---|---|---|---|---|---|---|
|
BLU
6076
DELISTED
BELLUS Health Inc.
BLU
| $44K | ﹤0.01% |
+6,177
| New | +$47.9K |
|
|
CAJ
6077
PUT
DELISTED
Canon, Inc.
CAJ
| $44K | ﹤0.01% |
2,000
+1,800
| +900% | +$39.5K |
|
|
CORZ
6078
CALL
DELISTED
Core Scientific, Inc. Common Stock
CORZ
| $44K | ﹤0.01% |
147,000
-56,500
| -28% | -$16.9K |
|
6079
CALL
Acadia Healthcare
ACHC
$2.76B
| $43K | ﹤0.01% |
600
-2,900
| -83% | -$226K |
|
6080
PUT
Achieve Life Sciences
ACHV
$659M
| $43K | ﹤0.01% |
+6,400
| New | +$30.4K |
|
6081
Codexis
CDXS
$151M
| $43K | ﹤0.01% |
10,479
+10,398
| +12,837% | +$54.5K |
|
|
CGAU
6082
Centerra Gold
CGAU
$3.36B
| $43K | ﹤0.01% |
6,692
-11,619
| -63% | -$72.5K |
|
6083
Douglas Elliman
DOUG
$154M
| $43K | ﹤0.01% |
14,802
-3,269
| -18% | -$13K |
|
6084
CALL
Greenlight Captial
GLRE
$552M
| $43K | ﹤0.01% |
+4,600
| New | +$43.4K |
|
6085
PUT
Genius Group
GNS
$28.4M
| $43K | ﹤0.01% |
+3,230
| New | +$110K |
|
|
GTY
6086
CALL
Getty Realty Corp
GTY
$2.11B
| $43K | ﹤0.01% |
1,200
-4,600
| -79% | -$161K |
|
|
HDSN
6087
Hudson Technologies
HDSN
$254M
| $43K | ﹤0.01% |
+4,966
| New | +$48.1K |
|
6088
PUT
ITT
ITT
$17.5B
| $43K | ﹤0.01% |
500
+200
| +67% | +$17.6K |
|
6089
PUT
Lightbridge
LTBR
$271M
| $43K | ﹤0.01% |
10,600
+9,600
| +960% | +$40.1K |
|
|
LX
6090
PUT
LexinFintech Holdings
LX
$241M
| $43K | ﹤0.01% |
16,200
| – | – |
|
6091
Magnolia Oil & Gas
MGY
$6.09B
| $43K | ﹤0.01% |
1,991
+1,292
| +185% | +$28.7K |
|
6092
Enviri
NVRI
$623M
| $43K | ﹤0.01% |
6,379
-8,558
| -57% | -$64.5K |
|
6093
ProShares Short Russell2000
RWM
$132M
| $43K | ﹤0.01% |
+1,818
| New | +$42.6K |
|
|
SHYF
6094
CALL
DELISTED
The Shyft Group
SHYF
| $43K | ﹤0.01% |
1,900
+1,400
| +280% | +$39.3K |
|
6095
PUT
Thryv Holdings
THRY
$180M
| $43K | ﹤0.01% |
+1,900
| New | +$42.5K |
|
|
VBTX
6096
CALL
DELISTED
Veritex Holdings
VBTX
| $43K | ﹤0.01% |
+2,400
| New | +$61.2K |
|
6097
CALL
Victory Capital Holdings
VCTR
$6.19B
| $43K | ﹤0.01% |
1,500
+1,100
| +275% | +$33.5K |
|
6098
CALL
Village Farms International
VFF
$234M
| $43K | ﹤0.01% |
52,600
-27,400
| -34% | -$30.7K |
|
|
VNET
6099
CALL
VNET Group
VNET
$2.04B
| $43K | ﹤0.01% |
13,300
-23,400
| -64% | -$114K |
|
|
GPUS
6100
CALL
Hyperscale Data Inc
GPUS
$55.4M
| $43K | ﹤0.01% |
3
| – | – |
|
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.