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 | |
|---|---|---|---|---|---|---|
4951
PUT
Vanguard Total International Stock ETF
VXUS
$151B
| $112K | ﹤0.01% |
2,000
-1,300
| -39% | -$72.7K |
|
|
CIR
4952
PUT
DELISTED
CIRCOR International, Inc
CIR
| $112K | ﹤0.01% |
2,000
+100
| +5% | +$3.5K |
|
4953
CALL
AirSculpt Technologies
AIRS
$308M
| $111K | ﹤0.01% |
12,900
+6,100
| +90% | +$39.9K |
|
4954
Beam Therapeutics
BEAM
$2.68B
| $111K | ﹤0.01% |
3,495
-18,523
| -84% | -$601K |
|
4955
PUT
Global Net Lease
GNL
$1.87B
| $111K | ﹤0.01% |
10,800
+3,700
| +52% | +$39.9K |
|
4956
PUT
Globalstar
GSAT
$10.1B
| $111K | ﹤0.01% |
6,853
+2,173
| +46% | +$34.8K |
|
4957
InflaRx
IFRX
$243M
| $111K | ﹤0.01% |
24,932
+12,888
| +107% | +$57.7K |
|
4958
MYR Group
MYRG
$5.01B
| $111K | ﹤0.01% |
804
+599
| +292% | +$78.2K |
|
4959
CALL
Pangaea Logistics
PANL
$484M
| $111K | ﹤0.01% |
16,500
-37,100
| -69% | -$229K |
|
|
RENT
4960
CALL
Rent the Runway
RENT
$124M
| $111K | ﹤0.01% |
2,810
+1,415
| +101% | +$69.7K |
|
|
LL
4961
PUT
DELISTED
LL Flooring Holdings, Inc.
LL
| $111K | ﹤0.01% |
29,200
-500
| -2% | -$1.93K |
|
4962
Bunge Global
BG
$20.9B
| $110K | ﹤0.01% |
1,168
-6,950
| -86% | -$645K |
|
4963
PUT
Banco Macro
BMA
$5.81B
| $110K | ﹤0.01% |
4,200
+500
| +14% | +$10K |
|
4964
PUT
Church & Dwight Co
CHD
$23.7B
| $110K | ﹤0.01% |
1,100
-1,500
| -58% | -$141K |
|
4965
CALL
Copa Holdings
CPA
$5.56B
| $110K | ﹤0.01% |
1,000
-3,300
| -77% | -$331K |
|
4966
PUT
Genesco
GCO
$434M
| $110K | ﹤0.01% |
+4,400
| New | +$127K |
|
4967
CALL
Gladstone Capital
GLAD
$427M
| $110K | ﹤0.01% |
5,650
+2,350
| +71% | +$44.6K |
|
4968
Howmet Aerospace
HWM
$109B
| $110K | ﹤0.01% |
+2,224
| New | +$99K |
|
4969
PUT
Vroom Inc
VRM
$36.4M
| $110K | ﹤0.01% |
956
+206
| +27% | +$15.7K |
|
|
GHL
4970
DELISTED
Greenhill & Co., Inc.
GHL
| $110K | ﹤0.01% |
+7,530
| New | +$79.5K |
|
|
ADN
4971
CALL
DELISTED
Advent Technologies
ADN
| $109K | ﹤0.01% |
6,183
-5,360
| -46% | -$129K |
|
|
BLUE
4972
CALL
DELISTED
bluebird bio
BLUE
| $109K | ﹤0.01% |
1,810
-2,240
| -55% | -$164K |
|
4973
PUT
Element Solutions
ESI
$8.48B
| $109K | ﹤0.01% |
5,700
+4,500
| +375% | +$82.7K |
|
4974
First Horizon
FHN
$12.2B
| $109K | ﹤0.01% |
9,698
-19,376
| -67% | -$260K |
|
|
JMIA
4975
CALL
Jumia Technologies
JMIA
$708M
| $109K | ﹤0.01% |
32,000
-19,700
| -38% | -$60.4K |
|
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.