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 | |
|---|---|---|---|---|---|---|
1676
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$423M
| $2.81M | ﹤0.01% |
40,100
-97,800
| -71% | -$6.89M |
|
|
SIX
1677
CALL
DELISTED
Six Flags Entertainment Corp.
SIX
| $2.81M | ﹤0.01% |
105,300
-144,500
| -58% | -$3.86M |
|
1678
PUT
ALPS REIT Dividend Dogs ETF
RDOG
$11.6M
| $2.8M | ﹤0.01% |
72,400
-88,300
| -55% | -$3.47M |
|
1679
iShares MSCI Germany ETF
EWG
$1.5B
| $2.8M | ﹤0.01% |
+98,449
| New | +$2.71M |
|
1680
Duolingo
DUOL
$5.7B
| $2.8M | ﹤0.01% |
19,618
+18,763
| +2,195% | +$1.93M |
|
1681
PayPal
PYPL
$49.5B
| $2.8M | ﹤0.01% |
36,844
-231,724
| -86% | -$17.8M |
|
1682
PUT
Danaos Corp
DAC
$2.55B
| $2.8M | ﹤0.01% |
51,200
+27,300
| +114% | +$1.55M |
|
1683
Comcast
CMCSA
$79.7B
| $2.79M | ﹤0.01% |
+73,684
| New | +$2.79M |
|
1684
PUT
PACCAR
PCAR
$69.6B
| $2.79M | ﹤0.01% |
38,150
+30,050
| +371% | +$2.15M |
|
1685
PUT
Texas Roadhouse
TXRH
$12.7B
| $2.79M | ﹤0.01% |
25,800
+10,700
| +71% | +$1.1M |
|
1686
CALL
Star Bulk Carriers
SBLK
$3.14B
| $2.78M | ﹤0.01% |
131,500
-341,100
| -72% | -$7.46M |
|
|
EMBJ
1687
PUT
Embraer S.A. ADS
EMBJ
$11.6B
| $2.77M | ﹤0.01% |
169,500
-59,600
| -26% | -$793K |
|
1688
CALL
Frontline
FRO
$8.75B
| $2.77M | ﹤0.01% |
167,100
-6,400
| -4% | -$101K |
|
1689
PUT
Quanta Services
PWR
$93.9B
| $2.75M | ﹤0.01% |
16,500
+13,400
| +432% | +$2.06M |
|
1690
Alnylam Pharmaceuticals
ALNY
$36.3B
| $2.75M | ﹤0.01% |
13,723
+4,846
| +55% | +$1.02M |
|
1691
CALL
Corteva
CTVA
$59.7B
| $2.74M | ﹤0.01% |
45,400
-32,400
| -42% | -$1.98M |
|
1692
PUT
Illinois Tool Works
ITW
$81.4B
| $2.73M | ﹤0.01% |
11,200
-2,500
| -18% | -$583K |
|
|
ISEE
1693
PUT
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $2.72M | ﹤0.01% |
111,900
+39,000
| +53% | +$854K |
|
1694
PUT
Johnson Controls International
JCI
$87.5B
| $2.72M | ﹤0.01% |
45,200
-38,600
| -46% | -$2.47M |
|
1695
CALL
JetBlue
JBLU
$1.96B
| $2.72M | ﹤0.01% |
373,700
-258,500
| -41% | -$2.04M |
|
|
FLG
1696
PUT
Flagstar Bank National Association
FLG
$5.77B
| $2.71M | ﹤0.01% |
100,000
+19,567
| +24% | +$529K |
|
1697
PUT
Kilroy Realty
KRC
$4.58B
| $2.71M | ﹤0.01% |
83,600
+78,600
| +1,572% | +$2.87M |
|
1698
CALL
Yeti Holdings
YETI
$3.82B
| $2.71M | ﹤0.01% |
67,700
+1,700
| +3% | +$70.2K |
|
1699
CALL
Orion
OEC
$394M
| $2.7M | ﹤0.01% |
103,600
+27,900
| +37% | +$631K |
|
1700
Autodesk
ADSK
$44.3B
| $2.7M | ﹤0.01% |
12,958
+12,390
| +2,181% | +$2.55M |
|
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.