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 | |
|---|---|---|---|---|---|---|
5976
First Citizens BancShares
FCNCA
$24.9B
| $47K | ﹤0.01% |
49
-507
| -91% | -$377K |
|
5977
CALL
KULR Technology Group
KULR
$123M
| $47K | ﹤0.01% |
6,825
+5,775
| +550% | +$53.7K |
|
5978
PUT
CS Disco
LAW
$250M
| $47K | ﹤0.01% |
7,100
+6,700
| +1,675% | +$47.7K |
|
5979
PUT
Loop Industries
LOOP
$35.3M
| $47K | ﹤0.01% |
+13,800
| New | +$34.4K |
|
5980
PUT
Nerdy
NRDY
$106M
| $47K | ﹤0.01% |
+11,400
| New | +$34.8K |
|
5981
CALL
Nu Skin
NUS
$252M
| $47K | ﹤0.01% |
1,200
+100
| +9% | +$4.16K |
|
5982
PUT
Northwest Natural Holdings
NWN
$2.06B
| $47K | ﹤0.01% |
+1,000
| New | +$48.3K |
|
5983
Pliant Therapeutics
PLRX
$64.4M
| $47K | ﹤0.01% |
+1,776
| New | +$50.6K |
|
|
SA
5984
PUT
Seabridge Gold
SA
$2.78B
| $47K | ﹤0.01% |
3,700
-2,200
| -37% | -$27.2K |
|
5985
Sumitomo Mitsui Financial
SMFG
$164B
| $47K | ﹤0.01% |
+5,924
| New | +$50.1K |
|
5986
CALL
Interface
TILE
$1.99B
| $47K | ﹤0.01% |
5,900
+5,400
| +1,080% | +$53.1K |
|
|
GGRP
5987
Glimpse Group
GGRP
$18.8M
| $47K | ﹤0.01% |
12,764
+8,442
| +195% | +$34.1K |
|
|
TRTN
5988
DELISTED
Triton International Limited
TRTN
| $47K | ﹤0.01% |
751
-2,547
| -77% | -$173K |
|
|
VORB
5989
PUT
DELISTED
Virgin Orbit Holdings, Inc. Common Stock
VORB
| $47K | ﹤0.01% |
28,700
+24,900
| +655% | +$33.5K |
|
|
SBDS
5990
DELISTED
Solo Brands Inc
SBDS
| $47K | ﹤0.01% |
167
-133
| -44% | -$25.6K |
|
5991
CALL
BioAtla
BCAB
$5.46M
| $46K | ﹤0.01% |
+348
| New | +$62.7K |
|
5992
PUT
Brink's
BCO
$4.88B
| $46K | ﹤0.01% |
700
-600
| -46% | -$38.1K |
|
5993
PUT
DMC Global
BOOM
$138M
| $46K | ﹤0.01% |
2,100
+1,100
| +110% | +$25.2K |
|
5994
PUT
CarGurus
CARG
$3.27B
| $46K | ﹤0.01% |
2,500
-8,200
| -77% | -$140K |
|
5995
CALL
Commerce Bancshares
CBSH
$8.53B
| $46K | ﹤0.01% |
+926
| New | +$51.7K |
|
5996
Clearwater Paper
CLW
$339M
| $46K | ﹤0.01% |
+1,391
| New | +$50.3K |
|
5997
CALL
Comtech Telecommunications
CMTL
$50.3M
| $46K | ﹤0.01% |
3,700
+3,100
| +517% | +$44.4K |
|
5998
CALL
Covenant Logistics
CVLG
$894M
| $46K | ﹤0.01% |
2,600
+600
| +30% | +$10.4K |
|
5999
CALL
Sprinklr
CXM
$1.49B
| $46K | ﹤0.01% |
3,600
-19,700
| -85% | -$200K |
|
|
DX
6000
PUT
Dynex Capital
DX
$3.15B
| $46K | ﹤0.01% |
3,800
-200
| -5% | -$2.67K |
|
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.