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 | |
|---|---|---|---|---|---|---|
|
IRBT
1651
PUT
DELISTED
iRobot
IRBT
| $2.88M | ﹤0.01% |
66,100
+47,900
| +263% | +$2.12M |
|
|
MAXR
1652
CALL
DELISTED
Maxar Technologies Inc. Common Stock
MAXR
| $2.88M | ﹤0.01% |
56,500
-107,300
| -66% | -$5.49M |
|
1653
CALL
Westrock Coffee
WEST
$741M
| $2.87M | ﹤0.01% |
234,400
+2,900
| +1% | +$35.7K |
|
|
XIFR
1654
PUT
XPLR Infrastructure LP
XIFR
$1.18B
| $2.87M | ﹤0.01% |
47,200
+36,600
| +345% | +$2.52M |
|
1655
Aurinia Pharmaceuticals
AUPH
$1.97B
| $2.87M | ﹤0.01% |
261,570
+101,670
| +64% | +$896K |
|
1656
CALL
FS KKR Capital
FSK
$2.98B
| $2.86M | ﹤0.01% |
154,800
+54,100
| +54% | +$1.03M |
|
1657
CALL
Old Dominion Freight Line
ODFL
$48.5B
| $2.86M | ﹤0.01% |
16,800
-4,600
| -21% | -$770K |
|
1658
PUT
EPR Properties
EPR
$4.86B
| $2.86M | ﹤0.01% |
75,000
-500
| -0.7% | -$19.9K |
|
|
CPRX
1659
CALL
DELISTED
Catalyst Pharmaceutical
CPRX
| $2.86M | ﹤0.01% |
172,300
+154,300
| +857% | +$2.55M |
|
1660
PUT
Clearfield
CLFD
$421M
| $2.85M | ﹤0.01% |
61,300
+51,900
| +552% | +$3.34M |
|
1661
CALL
Iridium Communications
IRDM
$4.85B
| $2.85M | ﹤0.01% |
46,000
+32,800
| +248% | +$1.96M |
|
1662
PUT
TAL Education Group
TAL
$5.71B
| $2.85M | ﹤0.01% |
444,400
+38,700
| +10% | +$279K |
|
1663
PUT
Barclays
BCS
$94.1B
| $2.85M | ﹤0.01% |
395,800
-23,900
| -6% | -$198K |
|
|
WBA
1664
DELISTED
Walgreens Boots Alliance
WBA
| $2.84M | ﹤0.01% |
+82,272
| New | +$2.92M |
|
|
LTHM
1665
CALL
DELISTED
Livent Corporation
LTHM
| $2.84M | ﹤0.01% |
130,900
-102,900
| -44% | -$2.38M |
|
1666
Invesco DB US Dollar Index Bullish Fund
UUP
$434M
| $2.83M | ﹤0.01% |
101,679
-328,175
| -76% | -$9.17M |
|
1667
PUT
First Majestic Silver
AG
$8.05B
| $2.83M | ﹤0.01% |
393,000
+124,700
| +46% | +$918K |
|
1668
PUT
Winnebago Industries
WGO
$870M
| $2.83M | ﹤0.01% |
49,000
-27,000
| -36% | -$1.65M |
|
1669
CALL
Ovintiv
OVV
$17.7B
| $2.83M | ﹤0.01% |
78,300
-14,500
| -16% | -$640K |
|
1670
CALL
Hartford Financial Services
HIG
$38.5B
| $2.82M | ﹤0.01% |
40,500
-3,500
| -8% | -$260K |
|
|
PPLC
1671
CALL
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $2.82M | ﹤0.01% |
401,300
-146,300
| -27% | -$1.03M |
|
|
LKFT
1672
PUT
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.82B
| $2.82M | ﹤0.01% |
73,000
+42,300
| +138% | +$1.74M |
|
1673
PUT
Sibanye-Stillwater
SBSW
$5.92B
| $2.82M | ﹤0.01% |
339,000
+75,200
| +29% | +$730K |
|
1674
Philip Morris
PM
$301B
| $2.82M | ﹤0.01% |
28,987
-3,545
| -11% | -$353K |
|
1675
PUT
Teledyne Technologies
TDY
$30.4B
| $2.82M | ﹤0.01% |
6,300
+5,300
| +530% | +$2.25M |
|
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.