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 | |
|---|---|---|---|---|---|---|
7176
CALL
Heartland Express
HTLD
$1.01B
| $15K | ﹤0.01% |
+1,000
| New | +$16.3K |
|
|
IAS
7177
DELISTED
Integral Ad Science
IAS
| $15K | ﹤0.01% |
1,103
+445
| +68% | +$5K |
|
|
INN
7178
Summit Hotel Properties
INN
$766M
| $15K | ﹤0.01% |
2,199
-15,860
| -88% | -$120K |
|
7179
Iris Energy
IREN
$10.5B
| $15K | ﹤0.01% |
5,102
-5,516
| -52% | -$13.5K |
|
|
7180
PUT
Iris Energy
IREN
$10.5B
| $15K | ﹤0.01% |
5,000
-5,300
| -51% | -$13K |
|
7181
iShares Core S&P Total US Stock Market ETF
ITOT
$92.3B
| $15K | ﹤0.01% |
173
-3,927
| -96% | -$349K |
|
|
NXDR
7182
Nextdoor Holdings
NXDR
$885M
| $15K | ﹤0.01% |
7,238
-6,927
| -49% | -$14.8K |
|
|
LAND
7183
Gladstone Land Corp
LAND
$365M
| $15K | ﹤0.01% |
933
-823
| -47% | -$14.9K |
|
7184
PUT
Lindsay Corp
LNN
$1.14B
| $15K | ﹤0.01% |
100
-1,600
| -94% | -$242K |
|
7185
PUT
Maximus
MMS
$3.32B
| $15K | ﹤0.01% |
200
-1,100
| -85% | -$84.7K |
|
7186
CALL
MediciNova
MNOV
$63.5M
| $15K | ﹤0.01% |
+7,000
| New | +$16K |
|
7187
PUT
Microvision
MVIS
$84.8M
| $15K | ﹤0.01% |
5,800
-49,700
| -90% | -$126K |
|
7188
CALL
NatWest
NWG
$69.9B
| $15K | ﹤0.01% |
2,300
+900
| +64% | +$6.35K |
|
|
TEAD
7189
Teads Holding Co
TEAD
$76.2M
| $15K | ﹤0.01% |
+3,705
| New | +$16.8K |
|
7190
Organogenesis Holdings
ORGO
$324M
| $15K | ﹤0.01% |
7,328
+4,949
| +208% | +$12.2K |
|
7191
CALL
Pebblebrook Hotel Trust
PEB
$2.18B
| $15K | ﹤0.01% |
1,100
+900
| +450% | +$13.1K |
|
|
PRPH
7192
PUT
DELISTED
ProPhase Labs
PRPH
| $15K | ﹤0.01% |
200
-100
| -33% | -$8.06K |
|
7193
PUT
Retractable Technologies
RVP
$20.1M
| $15K | ﹤0.01% |
8,700
+500
| +6% | +$943 |
|
7194
PUT
abrdn Physical Gold Shares ETF
SGOL
$6.9B
| $15K | ﹤0.01% |
800
-1,900
| -70% | -$34.4K |
|
7195
PUT
Millicom
TIGO
$15.8B
| $15K | ﹤0.01% |
800
+700
| +700% | +$12.2K |
|
|
UROY
7196
PUT
Uranium Royalty Corp
UROY
$478M
| $15K | ﹤0.01% |
7,600
-58,800
| -89% | -$141K |
|
|
UXIN
7197
CALL
Uxin Ltd
UXIN
$306M
| $15K | ﹤0.01% |
710
-1,730
| -71% | -$50.8K |
|
7198
VirnetX Holding Corp
VHC
$53.8M
| $15K | ﹤0.01% |
590
-3,139
| -84% | -$102K |
|
7199
CALL
Viridian Therapeutics
VRDN
$2.2B
| $15K | ﹤0.01% |
600
+300
| +100% | +$9.62K |
|
7200
PUT
CoinShares ETF Trust CoinShares Bitcoin Mining ETF
WGMI
$213M
| $15K | ﹤0.01% |
1,700
+300
| +21% | +$2.4K |
|
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.