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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6126
PUT
Absci
ABSI
$1.32B
| $40K | ﹤0.01% |
19,400
-32,200
| -62% | -$88.1K |
|
6127
Arqit Quantum
ARQQ
$298M
| $40K | ﹤0.01% |
443
+23
| +5% | +$3.38K |
|
|
AVDX
6128
PUT
DELISTED
AvidXchange
AVDX
| $40K | ﹤0.01% |
4,100
-11,000
| -73% | -$95.5K |
|
6129
Axalta
AXTA
$7.66B
| $40K | ﹤0.01% |
+1,586
| New | +$39.2K |
|
6130
CALL
Cathay General Bancorp
CATY
$4.22B
| $40K | ﹤0.01% |
1,000
-1,000
| -50% | -$43.3K |
|
6131
Carlyle Secured Lending
CGBD
$694M
| $40K | ﹤0.01% |
+2,816
| New | +$37.6K |
|
6132
PUT
Cincinnati Financial
CINF
$27.3B
| $40K | ﹤0.01% |
400
-400
| -50% | -$41.2K |
|
6133
Core Laboratories
CLB
$488M
| $40K | ﹤0.01% |
2,012
-7,678
| -79% | -$149K |
|
6134
CALL
Core & Main
CNM
$8.23B
| $40K | ﹤0.01% |
2,100
+800
| +62% | +$17K |
|
6135
PUT
Corcept Therapeutics
CORT
$12.4B
| $40K | ﹤0.01% |
2,000
| – | – |
|
6136
Fidelity MSCI Communication Services Index ETF
FCOM
$1.77B
| $40K | ﹤0.01% |
+1,311
| New | +$41.9K |
|
6137
PUT
FNB Corp
FNB
$6.73B
| $40K | ﹤0.01% |
3,100
-8,000
| -72% | -$107K |
|
6138
PUT
Freedom Holding
FRHC
$9.63B
| $40K | ﹤0.01% |
+700
| New | +$40.2K |
|
6139
CALL
GeoPark
GPRK
$633M
| $40K | ﹤0.01% |
+2,600
| New | +$37.1K |
|
|
NBP
6140
NovaBridge Biosciences American Depositary Shares
NBP
$185M
| $40K | ﹤0.01% |
9,635
+8,387
| +672% | +$31.8K |
|
6141
PUT
The Joint Corp
JYNT
$118M
| $40K | ﹤0.01% |
2,900
-11,700
| -80% | -$181K |
|
|
NXDR
6142
PUT
Nextdoor Holdings
NXDR
$847M
| $40K | ﹤0.01% |
19,600
-113,500
| -85% | -$266K |
|
|
TBHC
6143
PUT
DELISTED
The Brand House Collective
TBHC
| $40K | ﹤0.01% |
12,400
-300
| -2% | -$1.1K |
|
6144
CALL
MiMedx Group
MDXG
$602M
| $40K | ﹤0.01% |
14,500
-18,900
| -57% | -$56.5K |
|
6145
National Health Investors
NHI
$3.72B
| $40K | ﹤0.01% |
779
+133
| +21% | +$7.29K |
|
6146
CALL
OraSure Technologies
OSUR
$279M
| $40K | ﹤0.01% |
8,500
+2,500
| +42% | +$11.5K |
|
|
6147
PUT
OraSure Technologies
OSUR
$279M
| $40K | ﹤0.01% |
8,400
-4,700
| -36% | -$21.5K |
|
|
PHX
6148
DELISTED
PHX Minerals
PHX
| $40K | ﹤0.01% |
10,375
-594
| -5% | -$2.23K |
|
6149
PUT
Park-Ohio Holdings
PKOH
$575M
| $40K | ﹤0.01% |
3,300
+2,300
| +230% | +$28.6K |
|
6150
PUT
PMV Pharmaceuticals
PMVP
$59.2M
| $40K | ﹤0.01% |
4,700
+4,600
| +4,600% | +$49K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.