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
|
+$114M |
| 2 |
NVIDIA
NVDA
|
+$85.9M |
| 3 |
Citigroup
C
|
+$61.5M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$45.5M |
| 5 |
Pfizer
PFE
|
+$41.6M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$467M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$71.2M |
| 3 |
Meta Platforms (Facebook)
META
|
+$47.6M |
| 4 |
Intel
INTC
|
+$41.9M |
| 5 |
TSMC
TSM
|
+$35.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.51% |
| 2 | Financials | 0.35% |
| 3 | Consumer Discretionary | 0.3% |
| 4 | Healthcare | 0.25% |
| 5 | Industrials | 0.18% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3101
CALL
Pacific Biosciences
PACB
$432M
| $683K | ﹤0.01% |
117,700
-40,500
| -26% | -$232K |
|
3102
PUT
Antero Midstream
AM
$10.3B
| $682K | ﹤0.01% |
74,300
-45,900
| -38% | -$452K |
|
3103
CALL
Blue Owl Capital
OWL
$6.63B
| $682K | ﹤0.01% |
73,900
-48,100
| -39% | -$534K |
|
|
RADI
3104
CALL
DELISTED
Radius Global Infrastructure, Inc. Class A Common Stock
RADI
| $682K | ﹤0.01% |
72,500
+49,100
| +210% | +$687K |
|
|
TCRR
3105
CALL
DELISTED
TCR2 Therapeutics Inc. Common Stock
TCRR
| $682K | ﹤0.01% |
379,200
-23,500
| -6% | -$68.1K |
|
3106
Invesco CurrencyShares British Pound Sterling Trust
FXB
$76.7M
| $681K | ﹤0.01% |
6,355
+4,531
| +248% | +$512K |
|
3107
PUT
Steris
STE
$22.4B
| $681K | ﹤0.01% |
+4,100
| New | +$834K |
|
3108
PUT
FLEX LNG
FLNG
$1.67B
| $680K | ﹤0.01% |
21,500
-41,100
| -66% | -$1.3M |
|
3109
CALL
Middleby
MIDD
$6.11B
| $679K | ﹤0.01% |
5,300
+3,800
| +253% | +$533K |
|
|
HTGCR
3110
CALL
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $679K | ﹤0.01% |
58,700
-13,300
| -18% | -$154K |
|
3111
CALL
Church & Dwight Co
CHD
$23.7B
| $678K | ﹤0.01% |
9,500
-25,700
| -73% | -$2.22M |
|
|
SBOW
3112
DELISTED
SilverBow Resources, Inc.
SBOW
| $678K | ﹤0.01% |
25,233
+25,014
| +11,422% | +$909K |
|
3113
Gartner
IT
$10.4B
| $676K | ﹤0.01% |
+2,444
| New | +$685K |
|
3114
CALL
SEI Investments
SEIC
$12.4B
| $676K | ﹤0.01% |
13,800
+12,200
| +763% | +$666K |
|
3115
CALL
Alto Ingredients
ALTO
$345M
| $675K | ﹤0.01% |
185,500
-7,300
| -4% | -$30.7K |
|
3116
PUT
Booz Allen Hamilton
BAH
$8.78B
| $674K | ﹤0.01% |
7,300
+4,500
| +161% | +$427K |
|
3117
CALL
Outfront Media
OUT
$5.72B
| $674K | ﹤0.01% |
45,109
-2,439
| -5% | -$43K |
|
3118
CALL
Cogent Communications
CCOI
$649M
| $672K | ﹤0.01% |
12,900
+4,700
| +57% | +$271K |
|
3119
PUT
Intrepid Potash
IPI
$474M
| $672K | ﹤0.01% |
17,000
-9,100
| -35% | -$395K |
|
|
SOHU
3120
CALL
Sohu.com
SOHU
$346M
| $671K | ﹤0.01% |
41,800
+35,600
| +574% | +$602K |
|
3121
PUT
Bloomin' Brands
BLMN
$736M
| $670K | ﹤0.01% |
36,600
-12,200
| -25% | -$242K |
|
3122
Cincinnati Financial
CINF
$28.3B
| $670K | ﹤0.01% |
+7,486
| New | +$771K |
|
3123
CALL
Eversource Energy
ES
$28.4B
| $670K | ﹤0.01% |
8,600
+3,200
| +59% | +$282K |
|
3124
CALL
Tronox
TROX
$981M
| $670K | ﹤0.01% |
54,700
+47,700
| +681% | +$708K |
|
|
3125
Alto Ingredients
ALTO
$345M
| $669K | ﹤0.01% |
183,964
-77,713
| -30% | -$327K |
|
Similar funds
Simplex Trading's Q3 2022 Portfolio in Review
As of Q3 2022, Simplex Trading held 11,570 positions worth $88.5B, down 6% from $94.1B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading's Q3 2022 filing shows 1,564 new, 4,281 increased, 3,851 reduced and 1,575 closed positions. Its largest new stake was Microsoft: 432,062 shares worth $101M. The largest sale was Apple, an estimated $467M.
By sector, the portfolio is most concentrated in Technology at 0.51% of assets, down from 0.84% a quarter earlier, followed by Financials and Consumer Discretionary.
- Simplex Trading's largest Q3 2022 buy was Microsoft: 432,062 shares worth $101M.
- Simplex Trading added most to NVIDIA in Q3 2022, an estimated $85.9M increase.
- Simplex Trading's biggest Q3 2022 reduction was Apple, cutting an estimated $467M.
- Simplex Trading fully exited iShares Core S&P 500 ETF in Q3 2022, selling an estimated $34.3M.
- Simplex Trading's ten largest holdings make up 38% of its $88.5B portfolio in Q3 2022.
- Simplex Trading opened 1,564 new positions and closed 1,575 in Q3 2022.
- Simplex Trading's portfolio value fell 6% quarter-over-quarter to $88.5B.
Based on Simplex Trading's 13F filing for Q3 2022, filed 4 Nov 2022.