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 |
Microsoft
MSFT
|
+$53.9M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$52.9M |
| 3 |
NVIDIA
NVDA
|
+$47.1M |
| 4 |
PayPal
PYPL
|
+$41.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$28.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$51.4M |
| 2 |
Walmart Inc
WMT
|
+$46.4M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$34.2M |
| 4 |
Adobe
ADBE
|
+$33.5M |
| 5 |
Starbucks
SBUX
|
+$26.8M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.41% |
| 2 | Healthcare | 0.21% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.2% |
| 5 | Financials | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7151
Holley
HLLY
$336M
| $13K | ﹤0.01% |
3,360
-3,208
| -49% | -$9.56K |
|
7152
CALL
Hallador Energy
HNRG
$689M
| $13K | ﹤0.01% |
1,600
-18,500
| -92% | -$158K |
|
7153
CALL
Hooker Furnishings Corp
HOFT
$150M
| $13K | ﹤0.01% |
700
| – | – |
|
7154
CALL
Herc Holdings
HRI
$4.95B
| $13K | ﹤0.01% |
100
-200
| -67% | -$22.1K |
|
7155
PUT
Humacyte
HUMA
$170M
| $13K | ﹤0.01% |
4,800
-2,800
| -37% | -$10.1K |
|
7156
iShares S&P Small-Cap 600 Value ETF
IJS
$8.2B
| $13K | ﹤0.01% |
145
-2,069
| -93% | -$189K |
|
7157
Amplify BlueStar Israel Technology ETF
ITEQ
$113M
| $13K | ﹤0.01% |
+300
| New | +$13.6K |
|
7158
iShares Russell 3000 ETF
IWV
$19.5B
| $13K | ﹤0.01% |
55
-961
| -95% | -$231K |
|
7159
Kelly Services Class A
KELYA
$560M
| $13K | ﹤0.01% |
784
+360
| +85% | +$6.23K |
|
|
KNDI
7160
PUT
Kandi Technologies Group
KNDI
$63.5M
| $13K | ﹤0.01% |
3,300
-2,100
| -39% | -$7.1K |
|
7161
PUT
Kite Realty
KRG
$5.91B
| $13K | ﹤0.01% |
600
-1,200
| -67% | -$24.7K |
|
7162
PUT
Kymera Therapeutics
KYMR
$8.73B
| $13K | ﹤0.01% |
600
| – | – |
|
7163
PUT
Liberty Energy
LBRT
$2.89B
| $13K | ﹤0.01% |
1,000
-3,500
| -78% | -$45.3K |
|
7164
PUT
Lands' End
LE
$389M
| $13K | ﹤0.01% |
+1,800
| New | +$14.5K |
|
7165
Ligand Pharmaceuticals
LGND
$5.94B
| $13K | ﹤0.01% |
+187
| New | +$14K |
|
7166
CALL
MasterBrand
MBC
$1.15B
| $13K | ﹤0.01% |
1,200
-200
| -14% | -$1.92K |
|
|
MODV
7167
PUT
DELISTED
ModivCare
MODV
| $13K | ﹤0.01% |
300
-100
| -25% | -$5.94K |
|
|
MRCC
7168
PUT
DELISTED
Monroe Capital Corp
MRCC
| $13K | ﹤0.01% |
1,600
-1,000
| -38% | -$7.69K |
|
7169
PUT
NN Inc
NNBR
$261M
| $13K | ﹤0.01% |
5,800
+4,600
| +383% | +$6.97K |
|
7170
CALL
Enpro
NPO
$6.63B
| $13K | ﹤0.01% |
100
| – | – |
|
7171
CALL
NRX Pharmaceuticals
NRXP
$152M
| $13K | ﹤0.01% |
2,870
-70
| -2% | -$421 |
|
7172
Odyssey Marine Exploration
OMEX
$39.4M
| $13K | ﹤0.01% |
3,681
-10,450
| -74% | -$33.9K |
|
7173
Paymentus
PAY
$4.29B
| $13K | ﹤0.01% |
1,260
-8,830
| -88% | -$82.5K |
|
7174
CALL
PennantPark Floating Rate Capital
PFLT
$705M
| $13K | ﹤0.01% |
1,300
-22,700
| -95% | -$244K |
|
7175
Pinterest
PINS
$13.6B
| $13K | ﹤0.01% |
500
| – | – |
|
Similar funds
Simplex Trading's Q2 2023 Portfolio in Review
As of Q2 2023, Simplex Trading held 10,535 positions worth $122B, up 6.9% from $114B the previous quarter. Its ten largest holdings account for 43% of the portfolio.
Simplex Trading's Q2 2023 filing shows 1,474 new, 3,350 increased, 3,913 reduced and 1,517 closed positions. Its largest new stake was Microsoft: 171,935 shares worth $58.5M. The largest sale was Apple, an estimated $51.4M.
By sector, the portfolio is most concentrated in Technology at 0.41% of assets, down from 0.42% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q2 2023 buy was Microsoft: 171,935 shares worth $58.5M.
- Simplex Trading added most to iShares 20+ Year Treasury Bond ETF in Q2 2023, an estimated $52.9M increase.
- Simplex Trading's biggest Q2 2023 reduction was Adobe, cutting an estimated $33.5M.
- Simplex Trading fully exited Apple in Q2 2023, selling an estimated $51.4M.
- Simplex Trading's ten largest holdings make up 43% of its $122B portfolio in Q2 2023.
- Simplex Trading opened 1,474 new positions and closed 1,517 in Q2 2023.
- Simplex Trading's portfolio value rose 6.9% quarter-over-quarter to $122B.
Based on Simplex Trading's 13F filing for Q2 2023, filed 4 Aug 2023.