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 | |
|---|---|---|---|---|---|---|
2376
ArcelorMittal
MT
$50.4B
| $1.28M | ﹤0.01% |
+46,814
| New | +$1.29M |
|
|
AKTS
2377
PUT
DELISTED
Akoustis Technologies Inc
AKTS
| $1.28M | ﹤0.01% |
402,000
-3,200
| -0.8% | -$9.81K |
|
2378
CALL
Invesco DB Base Metals Fund
DBB
$306M
| $1.28M | ﹤0.01% |
64,000
+8,800
| +16% | +$164K |
|
2379
CALL
Ciena
CIEN
$55.3B
| $1.27M | ﹤0.01% |
30,000
-115,700
| -79% | -$5.27M |
|
|
AKTS
2380
CALL
DELISTED
Akoustis Technologies Inc
AKTS
| $1.27M | ﹤0.01% |
400,100
-21,100
| -5% | -$64.7K |
|
2381
Carriage Services
CSV
$618M
| $1.27M | ﹤0.01% |
39,141
+34,384
| +723% | +$963K |
|
2382
CALL
Gogo Inc
GOGO
$515M
| $1.27M | ﹤0.01% |
74,500
+52,600
| +240% | +$778K |
|
2383
Glaukos
GKOS
$9.02B
| $1.27M | ﹤0.01% |
17,781
+12,143
| +215% | +$697K |
|
2384
3D Systems Corp
DDD
$420M
| $1.26M | ﹤0.01% |
127,374
+109,613
| +617% | +$1M |
|
2385
PUT
FuboTV Inc
FUBO
$245M
| $1.26M | ﹤0.01% |
50,458
+28,075
| +125% | +$538K |
|
2386
CALL
TAL Education Group
TAL
$5.71B
| $1.26M | ﹤0.01% |
211,300
-18,700
| -8% | -$112K |
|
2387
PUT
Bentley Systems
BSY
$9.54B
| $1.26M | ﹤0.01% |
23,200
+18,600
| +404% | +$868K |
|
|
SQSP
2388
CALL
DELISTED
Squarespace, Inc.
SQSP
| $1.26M | ﹤0.01% |
39,900
-21,400
| -35% | -$646K |
|
2389
CALL
Masco
MAS
$16B
| $1.25M | ﹤0.01% |
21,700
+1,700
| +9% | +$89K |
|
2390
PUT
Tower Semiconductor
TSEM
$26.4B
| $1.25M | ﹤0.01% |
33,200
+9,600
| +41% | +$397K |
|
2391
PUT
Viatris
VTRS
$20.1B
| $1.24M | ﹤0.01% |
124,700
-8,700
| -7% | -$83.1K |
|
2392
PUT
Vera Therapeutics
VERA
$2.54B
| $1.24M | ﹤0.01% |
77,400
+70,300
| +990% | +$635K |
|
|
EH
2393
EHang Holdings
EH
$372M
| $1.24M | ﹤0.01% |
81,757
+57,527
| +237% | +$666K |
|
2394
PUT
EPR Properties
EPR
$4.86B
| $1.24M | ﹤0.01% |
26,500
-48,500
| -65% | -$2.05M |
|
|
BORR
2395
CALL
Borr Drilling
BORR
$1.31B
| $1.24M | ﹤0.01% |
164,600
+1,100
| +0.7% | +$7.88K |
|
2396
Waters Corp
WAT
$36.8B
| $1.24M | ﹤0.01% |
4,644
+4,126
| +797% | +$1.15M |
|
|
CHGX
2397
CALL
DELISTED
AXS Change Finance ESG ETF
CHGX
| $1.24M | ﹤0.01% |
63,900
+34,700
| +119% | +$1.02M |
|
2398
CALL
BioXcel Therapeutics
BTAI
$26.2M
| $1.23M | ﹤0.01% |
11,575
+10,112
| +691% | +$3.37M |
|
2399
GoDaddy
GDDY
$12.3B
| $1.23M | ﹤0.01% |
+16,422
| New | +$1.21M |
|
2400
PUT
Gen Digital
GEN
$15.6B
| $1.23M | ﹤0.01% |
66,500
-16,300
| -20% | -$285K |
|
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.