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 | |
|---|---|---|---|---|---|---|
5451
CALL
Evolent Health
EVH
$341M
| $72K | ﹤0.01% |
2,400
-3,800
| -61% | -$123K |
|
5452
PUT
Gaming and Leisure Properties
GLPI
$12.5B
| $72K | ﹤0.01% |
1,500
-100
| -6% | -$4.99K |
|
5453
La-Z-Boy
LZB
$1.59B
| $72K | ﹤0.01% |
+2,541
| New | +$71K |
|
5454
CALL
MGIC Investment
MTG
$6.15B
| $72K | ﹤0.01% |
4,600
+1,700
| +59% | +$25.2K |
|
5455
PUT
Oceaneering
OII
$4.79B
| $72K | ﹤0.01% |
3,900
-1,400
| -26% | -$24.1K |
|
5456
NuScale Power
SMR
$2.93B
| $72K | ﹤0.01% |
+10,713
| New | +$86.9K |
|
5457
CALL
Tenaya Therapeutics
TNYA
$159M
| $72K | ﹤0.01% |
12,400
+5,400
| +77% | +$31.4K |
|
5458
Voya Financial
VOYA
$9B
| $72K | ﹤0.01% |
1,015
-29,791
| -97% | -$2.14M |
|
5459
PUT
W&T Offshore
WTI
$524M
| $72K | ﹤0.01% |
18,700
-10,000
| -35% | -$43K |
|
5460
PUT
Adaptive Biotechnologies
ADPT
$3.59B
| $71K | ﹤0.01% |
10,600
+5,900
| +126% | +$43.9K |
|
5461
ALX Oncology
ALXO
$262M
| $71K | ﹤0.01% |
+9,531
| New | +$62.4K |
|
5462
ARK Genomic Revolution ETF
ARKG
$1.55B
| $71K | ﹤0.01% |
2,102
+2,002
| +2,002% | +$62.9K |
|
5463
CALL
Cedar Fair
FUN
$1.78B
| $71K | ﹤0.01% |
1,800
-4,600
| -72% | -$196K |
|
5464
Integer Holdings
ITGR
$3.41B
| $71K | ﹤0.01% |
+808
| New | +$66.1K |
|
5465
PUT
KBR
KBR
$4.55B
| $71K | ﹤0.01% |
1,100
-1,200
| -52% | -$71.6K |
|
5466
PUT
McEwen Inc
MUX
$1.03B
| $71K | ﹤0.01% |
9,900
-2,500
| -20% | -$20.2K |
|
5467
Blue Owl Capital
OWL
$6.93B
| $71K | ﹤0.01% |
+6,116
| New | +$65.8K |
|
5468
Simply Good Foods
SMPL
$916M
| $71K | ﹤0.01% |
1,956
+1,665
| +572% | +$61.2K |
|
5469
CALL
Smart Sand
SND
$184M
| $71K | ﹤0.01% |
43,400
+31,000
| +250% | +$51.1K |
|
5470
Sprout Social
SPT
$500M
| $71K | ﹤0.01% |
+1,553
| New | +$73.9K |
|
|
VRNA
5471
CALL
DELISTED
Verona Pharma
VRNA
| $71K | ﹤0.01% |
3,400
-15,100
| -82% | -$322K |
|
|
CMBT
5472
PUT
CMB.TECH NV
CMBT
$4.69B
| $71K | ﹤0.01% |
4,700
+3,700
| +370% | +$60.3K |
|
|
SCU
5473
DELISTED
Sculptor Capital Management, Inc. Class A Common Stock
SCU
| $71K | ﹤0.01% |
8,067
-5,882
| -42% | -$51.1K |
|
5474
Argan
AGX
$8.07B
| $70K | ﹤0.01% |
+1,794
| New | +$72.6K |
|
5475
CALL
AMC Global Media
AMCX
$496M
| $70K | ﹤0.01% |
5,900
-2,600
| -31% | -$37.5K |
|
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.