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 | |
|---|---|---|---|---|---|---|
5876
Amdocs
DOX
$5.86B
| $48K | ﹤0.01% |
489
+217
| +80% | +$20.4K |
|
5877
PUT
Driven Brands
DRVN
$2.33B
| $48K | ﹤0.01% |
1,800
+1,400
| +350% | +$39K |
|
5878
PUT
Establishment Labs
ESTA
$2.75B
| $48K | ﹤0.01% |
700
-10,900
| -94% | -$753K |
|
5879
PUT
4D Molecular Therapeutics
FDMT
$538M
| $48K | ﹤0.01% |
2,700
-47,600
| -95% | -$876K |
|
|
MCHB
5880
PUT
Mechanics Bancorp
MCHB
$3.7B
| $48K | ﹤0.01% |
+8,200
| New | +$77K |
|
|
ILPT
5881
PUT
Industrial Logistics Properties Trust
ILPT
$564M
| $48K | ﹤0.01% |
14,800
+5,200
| +54% | +$11.6K |
|
|
KREF
5882
PUT
KKR Real Estate Finance Trust
KREF
$448M
| $48K | ﹤0.01% |
4,000
-2,500
| -38% | -$28.1K |
|
5883
CALL
KRONOS Worldwide
KRO
$690M
| $48K | ﹤0.01% |
5,500
+3,900
| +244% | +$34.4K |
|
5884
PUT
Neonode
NEON
$14.2M
| $48K | ﹤0.01% |
6,000
+100
| +2% | +$746 |
|
5885
CALL
Ocugen
OCGN
$420M
| $48K | ﹤0.01% |
89,100
-5,500
| -6% | -$3.53K |
|
5886
PUT
PetMed Express
PETS
$42.3M
| $48K | ﹤0.01% |
3,500
-5,700
| -62% | -$85.6K |
|
5887
Sanmina
SANM
$10B
| $48K | ﹤0.01% |
+813
| New | +$44.6K |
|
5888
CALL
Sylvamo
SLVM
$1.48B
| $48K | ﹤0.01% |
1,200
-800
| -40% | -$34.6K |
|
5889
PUT
System1
SST
$14.1M
| $48K | ﹤0.01% |
1,080
-110
| -9% | -$4.16K |
|
5890
Tradr 2X Long Innovation ETF
TARK
$12.2M
| $48K | ﹤0.01% |
1,330
+1,014
| +321% | +$31K |
|
5891
Tenable Holdings
TENB
$3.66B
| $48K | ﹤0.01% |
1,117
+372
| +50% | +$15.2K |
|
5892
PUT
TriplePoint Venture Growth BDC
TPVG
$182M
| $48K | ﹤0.01% |
4,100
+800
| +24% | +$9.04K |
|
5893
PUT
Trinity Industries
TRN
$2.51B
| $48K | ﹤0.01% |
1,900
-300
| -14% | -$6.86K |
|
|
VNET
5894
VNET Group
VNET
$2.04B
| $48K | ﹤0.01% |
16,574
-12,503
| -43% | -$38K |
|
5895
PUT
Dentsply Sirona
XRAY
$2.69B
| $48K | ﹤0.01% |
1,200
-4,200
| -78% | -$167K |
|
|
APPH
5896
PUT
DELISTED
AppHarvest, Inc. Common Stock
APPH
| $48K | ﹤0.01% |
130,100
-92,400
| -42% | -$41.7K |
|
5897
C3.ai
AI
$1.41B
| $47K | ﹤0.01% |
1,312
-350,919
| -100% | -$9.88M |
|
5898
Amplify Travel Tech ETF
AWAY
$26.1M
| $47K | ﹤0.01% |
+2,798
| New | +$47.6K |
|
5899
CALL
CI&T Inc
CINT
$429M
| $47K | ﹤0.01% |
7,500
+7,100
| +1,775% | +$34.3K |
|
5900
PUT
CMS Energy
CMS
$22.6B
| $47K | ﹤0.01% |
+800
| New | +$48.3K |
|
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.