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 | |
|---|---|---|---|---|---|---|
|
PPL
3226
CALL
PPL Corp
PPL
$27.1B
| $542K | ﹤0.01% |
20,500
-43,200
| -68% | -$1.19M |
|
3227
Cheesecake Factory
CAKE
$4.32B
| $541K | ﹤0.01% |
+15,661
| New | +$519K |
|
3228
CALL
Mueller Industries
MLI
$14.2B
| $541K | ﹤0.01% |
24,800
+18,000
| +265% | +$342K |
|
3229
CALL
Clearway Energy Class C
CWEN
$5B
| $540K | ﹤0.01% |
19,000
-1,500
| -7% | -$45.3K |
|
3230
iShares Core MSCI Emerging Markets ETF
IEMG
$150B
| $540K | ﹤0.01% |
10,972
-28,249
| -72% | -$1.38M |
|
|
CERE
3231
CALL
DELISTED
Cerevel Therapeutics Holdings, Inc. Common Stock
CERE
| $540K | ﹤0.01% |
17,000
-23,000
| -58% | -$706K |
|
|
SQSP
3232
PUT
DELISTED
Squarespace, Inc.
SQSP
| $539K | ﹤0.01% |
17,100
+13,300
| +350% | +$402K |
|
3233
Stoke Therapeutics
STOK
$1.83B
| $537K | ﹤0.01% |
+50,555
| New | +$538K |
|
3234
PUT
Trex
TREX
$4.57B
| $537K | ﹤0.01% |
8,200
-4,000
| -33% | -$223K |
|
3235
CALL
Host Hotels & Resorts
HST
$17.1B
| $536K | ﹤0.01% |
31,900
-15,700
| -33% | -$263K |
|
|
NEWR
3236
PUT
DELISTED
New Relic, Inc.
NEWR
| $536K | ﹤0.01% |
8,200
+4,900
| +148% | +$353K |
|
3237
Iovance Biotherapeutics
IOVA
$2.19B
| $535K | ﹤0.01% |
76,042
+52,466
| +223% | +$376K |
|
|
DSKE
3238
CALL
DELISTED
Daseke, Inc. Common Stock
DSKE
| $535K | ﹤0.01% |
75,100
+14,200
| +23% | +$99.7K |
|
3239
Biohaven
BHVN
$2.18B
| $534K | ﹤0.01% |
+22,333
| New | +$384K |
|
3240
Lifecore Biomedical
LFCR
$163M
| $534K | ﹤0.01% |
55,274
+5,873
| +12% | +$35.9K |
|
3241
CALL
Watsco Inc
WSO
$15B
| $534K | ﹤0.01% |
1,400
-6,600
| -83% | -$2.24M |
|
3242
PUT
Blackstone Secured Lending
BXSL
$5.35B
| $533K | ﹤0.01% |
19,500
-600
| -3% | -$15.5K |
|
3243
CALL
United States Copper Index Fund
CPER
$750M
| $533K | ﹤0.01% |
23,000
+3,700
| +19% | +$87.4K |
|
|
PMT
3244
CALL
PennyMac Mortgage Investment
PMT
$839M
| $533K | ﹤0.01% |
39,600
-5,400
| -12% | -$66.1K |
|
3245
PUT
Alkermes
ALKS
$8.79B
| $532K | ﹤0.01% |
17,000
-7,400
| -30% | -$224K |
|
3246
CALL
Aurora
AUR
$12.2B
| $532K | ﹤0.01% |
181,000
+133,400
| +280% | +$223K |
|
3247
PUT
Columbia Sportswear
COLM
$3.25B
| $532K | ﹤0.01% |
6,900
+5,300
| +331% | +$427K |
|
3248
CALL
Golar LNG
GLNG
$4.99B
| $532K | ﹤0.01% |
26,400
+11,800
| +81% | +$254K |
|
3249
PUT
Brookfield Asset Management
BAM
$75.9B
| $531K | ﹤0.01% |
16,300
-17,100
| -51% | -$550K |
|
3250
CALL
Church & Dwight Co
CHD
$23.4B
| $531K | ﹤0.01% |
5,300
-46,300
| -90% | -$4.36M |
|
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.