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 |
Amazon
AMZN
|
+$170M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$71.3M |
| 3 |
AT&T
T
|
+$44.2M |
| 4 |
Meta Platforms (Facebook)
META
|
+$37.1M |
| 5 |
iShares MSCI Emerging Markets ETF
EEM
|
+$34.4M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Microsoft
MSFT
|
+$94.3M |
| 2 |
JPMorgan Chase
JPM
|
+$68.2M |
| 3 |
Citigroup
C
|
+$62.8M |
| 4 |
Berkshire Hathaway Class B
BRK.B
|
+$50.9M |
| 5 |
SPDR Gold Trust
GLD
|
+$46.3M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 0.38% |
| 2 | Technology | 0.35% |
| 3 | Communication Services | 0.24% |
| 4 | Healthcare | 0.2% |
| 5 | Consumer Staples | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
TPC
5926
PUT
Tutor Perini Cor
TPC
$4.41B
| $49K | ﹤0.01% |
6,600
-3,500
| -35% | -$24.8K |
|
|
GRTS
5927
PUT
DELISTED
Gritstone bio, Inc. Common Stock
GRTS
| $49K | ﹤0.01% |
14,300
-7,400
| -34% | -$21.1K |
|
|
GHL
5928
DELISTED
Greenhill & Co., Inc.
GHL
| $49K | ﹤0.01% |
+4,813
| New | +$41.6K |
|
5929
PUT
ABM Industries
ABM
$2.81B
| $48K | ﹤0.01% |
1,100
-23,900
| -96% | -$1.05M |
|
5930
CALL
Andersons Inc
ANDE
$2.41B
| $48K | ﹤0.01% |
1,400
-8,700
| -86% | -$309K |
|
5931
PUT
iShares Gold Trust
IAU
$62.9B
| $48K | ﹤0.01% |
2,200
-6,800
| -76% | -$223K |
|
5932
Leslie's
LESL
$8.9M
| $48K | ﹤0.01% |
200
| – | – |
|
5933
Lattice Semiconductor
LSCC
$17.6B
| $48K | ﹤0.01% |
+751
| New | +$45.3K |
|
5934
PUT
MDU Resources
MDU
$4.17B
| $48K | ﹤0.01% |
4,208
+1,052
| +33% | +$11.8K |
|
|
HTO
5935
PUT
H2O America
HTO
$2.57B
| $48K | ﹤0.01% |
+600
| New | +$42.9K |
|
5936
Symbotic
SYM
$5.48B
| $48K | ﹤0.01% |
4,024
-4,836
| -55% | -$56.3K |
|
5937
PUT
X4 Pharmaceuticals
XFOR
$375M
| $48K | ﹤0.01% |
1,617
+724
| +81% | +$34.3K |
|
5938
Xponential Fitness
XPOF
$273M
| $48K | ﹤0.01% |
2,105
+1,433
| +213% | +$29.5K |
|
|
ZH
5939
CALL
Zhihu
ZH
$281M
| $48K | ﹤0.01% |
6,200
+5,267
| +565% | +$36.9K |
|
|
NAPA
5940
CALL
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $48K | ﹤0.01% |
2,900
+1,300
| +81% | +$20K |
|
|
NAPA
5941
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $48K | ﹤0.01% |
2,948
+2,914
| +8,571% | +$44.8K |
|
|
BIOR
5942
CALL
DELISTED
Biora Therapeutics, Inc. Common Stock
BIOR
| $48K | ﹤0.01% |
1,464
-183
| -11% | -$13.3K |
|
5943
CALL
ACM Research
ACMR
$5.42B
| $47K | ﹤0.01% |
6,100
-9,500
| -61% | -$80.5K |
|
|
AHRT
5944
PUT
AH Realty Trust
AHRT
$529M
| $47K | ﹤0.01% |
4,100
-6,500
| -61% | -$74.9K |
|
|
API
5945
PUT
Agora
API
$338M
| $47K | ﹤0.01% |
12,100
+1,100
| +10% | +$3.63K |
|
5946
Astronics
ATRO
$3.43B
| $47K | ﹤0.01% |
5,557
+5,234
| +1,620% | +$38.7K |
|
|
AXDX
5947
CALL
DELISTED
Accelerate Diagnostics
AXDX
| $47K | ﹤0.01% |
6,710
+1,730
| +35% | +$18.9K |
|
5948
Cadiz
CDZI
$251M
| $47K | ﹤0.01% |
19,111
+18,708
| +4,642% | +$39K |
|
5949
PUT
Compass Diversified
CODI
$758M
| $47K | ﹤0.01% |
2,600
-2,300
| -47% | -$43.2K |
|
5950
CALL
CPS Technologies
CPSH
$75.5M
| $47K | ﹤0.01% |
17,500
-24,700
| -59% | -$74.9K |
|
Similar funds
Simplex Trading's Q4 2022 Portfolio in Review
As of Q4 2022, Simplex Trading held 11,206 positions worth $91.9B, up 3.9% from $88.5B the previous quarter. Its ten largest holdings account for 34% of the portfolio.
Simplex Trading's Q4 2022 filing shows 1,219 new, 3,365 increased, 4,370 reduced and 1,942 closed positions. Its largest new stake was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M. The largest sale was Microsoft, an estimated $94.3M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 0.38% of assets, up from 0.3% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q4 2022 buy was iShares MSCI Emerging Markets ETF: 932,756 shares worth $35.4M.
- Simplex Trading added most to Amazon in Q4 2022, an estimated $170M increase.
- Simplex Trading's biggest Q4 2022 reduction was Microsoft, cutting an estimated $94.3M.
- Simplex Trading fully exited JPMorgan Chase in Q4 2022, selling an estimated $68.2M.
- Simplex Trading's ten largest holdings make up 34% of its $91.9B portfolio in Q4 2022.
- Simplex Trading opened 1,219 new positions and closed 1,942 in Q4 2022.
- Simplex Trading's portfolio value rose 3.9% quarter-over-quarter to $91.9B.
Based on Simplex Trading's 13F filing for Q4 2022, filed 2 Feb 2023.