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 | |
|---|---|---|---|---|---|---|
5176
CALL
Iris Energy
IREN
$13.7B
| $92K | ﹤0.01% |
19,800
+10,800
| +120% | +$41.3K |
|
|
LGO
5177
PUT
Largo
LGO
$59.4M
| $92K | ﹤0.01% |
21,600
+200
| +0.9% | +$894 |
|
5178
Nutanix
NTNX
$16B
| $92K | ﹤0.01% |
+3,292
| New | +$87.4K |
|
5179
CALL
Natera
NTRA
$38.6B
| $92K | ﹤0.01% |
1,900
-59,200
| -97% | -$3.02M |
|
5180
Tradr TSLA Bear Daily ETF
TSLQ
$145M
| $92K | ﹤0.01% |
+159
| New | +$128K |
|
5181
CALL
Viridian Therapeutics
VRDN
$2.2B
| $92K | ﹤0.01% |
3,900
+3,300
| +550% | +$84.6K |
|
5182
PUT
Adient
ADNT
$1.72B
| $91K | ﹤0.01% |
2,400
-400
| -14% | -$14.8K |
|
|
AGS
5183
CALL
DELISTED
PlayAGS
AGS
| $91K | ﹤0.01% |
16,200
+8,200
| +103% | +$47.9K |
|
5184
Azenta
AZTA
$1.33B
| $91K | ﹤0.01% |
+1,970
| New | +$86.3K |
|
5185
PUT
Compass Diversified
CODI
$756M
| $91K | ﹤0.01% |
4,200
-1,600
| -28% | -$31.8K |
|
5186
CALL
Hexcel
HXL
$7.76B
| $91K | ﹤0.01% |
1,200
+700
| +140% | +$49.9K |
|
5187
CALL
KBR
KBR
$4.36B
| $91K | ﹤0.01% |
1,400
+900
| +180% | +$53.7K |
|
5188
PUT
MACOM Technology Solutions
MTSI
$19B
| $91K | ﹤0.01% |
1,400
+1,300
| +1,300% | +$78.8K |
|
5189
PUT
Oric Pharmaceuticals
ORIC
$1.2B
| $91K | ﹤0.01% |
+11,800
| New | +$67K |
|
5190
PUT
ReNew
RNW
$2.25B
| $91K | ﹤0.01% |
16,700
-1,500
| -8% | -$8.21K |
|
5191
First Trust Nasdaq Artificial Intelligence and Robotics ETF
ROBT
$714M
| $91K | ﹤0.01% |
2,002
+1,483
| +286% | +$63.5K |
|
5192
Safe Bulkers
SB
$810M
| $91K | ﹤0.01% |
28,113
+779
| +3% | +$2.73K |
|
5193
CALL
UMB Financial
UMBF
$11.1B
| $91K | ﹤0.01% |
1,500
+500
| +50% | +$29.8K |
|
|
GGRP
5194
Glimpse Group
GGRP
$18.6M
| $91K | ﹤0.01% |
25,778
+13,014
| +102% | +$53.4K |
|
5195
PUT
TeraWulf
WULF
$8.83B
| $91K | ﹤0.01% |
52,500
+47,700
| +994% | +$72.7K |
|
|
TIO
5196
PUT
DELISTED
Tingo Group, Inc. Common Stock
TIO
| $91K | ﹤0.01% |
+75,500
| New | +$170K |
|
|
CAN
5197
PUT
Canaan Creative
CAN
$182M
| $90K | ﹤0.01% |
42,300
+30,700
| +265% | +$74.4K |
|
|
DX
5198
PUT
Dynex Capital
DX
$3.18B
| $90K | ﹤0.01% |
7,200
+3,400
| +89% | +$39.7K |
|
5199
Enovis
ENOV
$1.69B
| $90K | ﹤0.01% |
1,418
+519
| +58% | +$29.6K |
|
5200
CALL
Fortis
FTS
$29.3B
| $90K | ﹤0.01% |
2,100
+600
| +40% | +$26.1K |
|
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.