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 | |
|---|---|---|---|---|---|---|
5051
PUT
Invesco DB Commodity Index Tracking Fund
DBC
$1.69B
| $109K | ﹤0.01% |
4,600
-61,100
| -93% | -$1.46M |
|
5052
Delek Logistics
DKL
$3.14B
| $109K | ﹤0.01% |
2,299
-2,218
| -49% | -$108K |
|
5053
National Beverage
FIZZ
$3B
| $109K | ﹤0.01% |
2,072
-197
| -9% | -$9.18K |
|
5054
CALL
Fulgent Genetics
FLGT
$574M
| $109K | ﹤0.01% |
3,500
-10,600
| -75% | -$341K |
|
5055
iShares Core MSCI Total International Stock ETF
IXUS
$58.4B
| $109K | ﹤0.01% |
+1,771
| New | +$108K |
|
|
JHG
5056
CALL
DELISTED
Janus Henderson
JHG
| $109K | ﹤0.01% |
4,100
-1,600
| -28% | -$42.6K |
|
5057
PUT
Perma-Fix Environmental Services
PESI
$357M
| $109K | ﹤0.01% |
+9,300
| New | +$60.5K |
|
5058
PUT
Telus
TU
$16.8B
| $109K | ﹤0.01% |
5,500
+1,400
| +34% | +$28.5K |
|
5059
PUT
Abercrombie & Fitch
ANF
$4.45B
| $108K | ﹤0.01% |
3,900
-16,200
| -81% | -$451K |
|
5060
Direxion Daily S&P Biotech Bull 3X ETF
LABU
$553M
| $108K | ﹤0.01% |
1,107
-234
| -17% | -$31.7K |
|
5061
Liberty Global Class C
LBTYK
$3.49B
| $108K | ﹤0.01% |
5,327
+451
| +9% | +$9.5K |
|
5062
Magnite
MGNI
$2.78B
| $108K | ﹤0.01% |
11,727
-27,701
| -70% | -$295K |
|
5063
Ocugen
OCGN
$427M
| $108K | ﹤0.01% |
+126,659
| New | +$138K |
|
|
ORC
5064
PUT
Orchid Island Capital
ORC
$1.32B
| $108K | ﹤0.01% |
10,200
+5,500
| +117% | +$62K |
|
5065
Invesco High Yield Equity Dividend Achievers ETF
PEY
$1.14B
| $108K | ﹤0.01% |
5,438
+5,389
| +10,998% | +$111K |
|
5066
PUT
SCYNEXIS
SCYX
$37M
| $108K | ﹤0.01% |
+4,538
| New | +$60.3K |
|
|
DOOR
5067
PUT
DELISTED
MASONITE INTERNATIONAL CORP
DOOR
| $108K | ﹤0.01% |
1,200
+200
| +20% | +$17.6K |
|
5068
AudioCodes
AUDC
$235M
| $107K | ﹤0.01% |
+7,122
| New | +$121K |
|
5069
ICU Medical
ICUI
$4.21B
| $107K | ﹤0.01% |
+649
| New | +$112K |
|
|
LX
5070
CALL
LexinFintech Holdings
LX
$246M
| $107K | ﹤0.01% |
39,600
-39,900
| -50% | -$115K |
|
5071
CALL
M/I Homes
MHO
$3.87B
| $107K | ﹤0.01% |
1,700
+1,600
| +1,600% | +$92.2K |
|
|
OPI
5072
PUT
DELISTED
Office Properties Income Trust
OPI
| $107K | ﹤0.01% |
8,700
-7,900
| -48% | -$121K |
|
|
RVPH
5073
PUT
DELISTED
REVIVA PHARMA HLDGS INC
RVPH
| $107K | ﹤0.01% |
1,285
+525
| +69% | +$45.8K |
|
5074
PUT
Saic
SAIC
$4.89B
| $107K | ﹤0.01% |
+1,000
| New | +$105K |
|
5075
CALL
Savara
SVRA
$1.14B
| $107K | ﹤0.01% |
55,100
+27,600
| +100% | +$62.2K |
|
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.