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 | |
|---|---|---|---|---|---|---|
5301
CALL
Blue Bird Corp
BLBD
$2.36B
| $83K | ﹤0.01% |
3,700
+3,100
| +517% | +$66.3K |
|
5302
United States Brent Oil Fund
BNO
$770M
| $83K | ﹤0.01% |
3,267
-13,942
| -81% | -$364K |
|
|
CMPS
5303
PUT
Compass Pathways
CMPS
$1.56B
| $83K | ﹤0.01% |
10,100
+5,500
| +120% | +$46.7K |
|
5304
CALL
Gladstone Investment Corp
GAIN
$646M
| $83K | ﹤0.01% |
6,400
-4,200
| -40% | -$55.2K |
|
5305
PUT
GrowGeneration
GRWG
$87.1M
| $83K | ﹤0.01% |
24,600
+200
| +0.8% | +$708 |
|
5306
PUT
ICL Group
ICL
$6.69B
| $83K | ﹤0.01% |
15,300
-258,600
| -94% | -$1.56M |
|
5307
ING
ING
$99.8B
| $83K | ﹤0.01% |
6,192
-151,047
| -96% | -$1.93M |
|
5308
CALL
OneSpaWorld
OSW
$2.64B
| $83K | ﹤0.01% |
6,900
-1,400
| -17% | -$16.2K |
|
5309
CALL
Rexford Industrial Realty
REXR
$8.56B
| $83K | ﹤0.01% |
1,600
+1,200
| +300% | +$65.4K |
|
5310
Champion Homes
SKY
$4.41B
| $83K | ﹤0.01% |
+1,279
| New | +$86.9K |
|
|
VRNT
5311
DELISTED
Verint Systems
VRNT
| $83K | ﹤0.01% |
2,381
-9,435
| -80% | -$340K |
|
5312
CALL
Angi Inc
ANGI
$229M
| $82K | ﹤0.01% |
2,490
+2,210
| +789% | +$61.9K |
|
5313
Douglas Emmett
DEI
$2.02B
| $82K | ﹤0.01% |
6,585
+4,889
| +288% | +$59.1K |
|
5314
PUT
Fortive
FTV
$17.7B
| $82K | ﹤0.01% |
1,460
-3,848
| -72% | -$194K |
|
5315
CALL
Puma Biotechnology
PBYI
$402M
| $82K | ﹤0.01% |
23,300
-27,000
| -54% | -$84.2K |
|
5316
TaskUs
TASK
$542M
| $82K | ﹤0.01% |
7,302
-7,861
| -52% | -$95.6K |
|
5317
PUT
Energy Fuels
UUUU
$2.93B
| $82K | ﹤0.01% |
13,200
-8,400
| -39% | -$49.3K |
|
|
CNH
5318
PUT
CNH Industrial
CNH
$12.8B
| $82K | ﹤0.01% |
5,700
-5,900
| -51% | -$82.8K |
|
|
GOEV
5319
PUT
DELISTED
Canoo Inc. Class A Common Stock
GOEV
| $82K | ﹤0.01% |
375
-974
| -72% | -$278K |
|
|
FM
5320
DELISTED
iShares Frontier and Select EM ETF
FM
| $82K | ﹤0.01% |
+3,205
| New | +$81.4K |
|
5321
PUT
Bruker
BRKR
$9.79B
| $81K | ﹤0.01% |
1,100
+600
| +120% | +$45.7K |
|
5322
PUT
Champions Oncology
CSBR
$73.1M
| $81K | ﹤0.01% |
+12,800
| New | +$66.1K |
|
5323
iShares US Healthcare Providers ETF
IHF
$1.21B
| $81K | ﹤0.01% |
1,600
+1,330
| +493% | +$67.2K |
|
5324
CALL
Kiniksa Pharmaceuticals
KNSA
$6.1B
| $81K | ﹤0.01% |
5,800
+4,500
| +346% | +$60.2K |
|
|
TGB
5325
Trekor Metals
TGB
$2.59B
| $81K | ﹤0.01% |
57,066
+29,842
| +110% | +$44.7K |
|
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.