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 | |
|---|---|---|---|---|---|---|
2051
Direxion Daily Junior Gold Miners Index Bear 2X ETF
JDST
$30.4M
| $1.57M | ﹤0.01% |
987
-387
| -28% | -$820K |
|
2052
PUT
RB Global
RBA
$20.8B
| $1.57M | ﹤0.01% |
27,200
+22,400
| +467% | +$1.3M |
|
2053
CALL
Bausch Health
BHC
$1.65B
| $1.57M | ﹤0.01% |
250,200
-704,300
| -74% | -$4.92M |
|
2054
CALL
Opendoor
OPEN
$3.69B
| $1.57M | ﹤0.01% |
1,400,063
-106,950
| -7% | -$205K |
|
2055
CALL
W.P. Carey
WPC
$17.1B
| $1.57M | ﹤0.01% |
20,522
+4,288
| +26% | +$322K |
|
2056
CALL
Factset
FDS
$9.05B
| $1.56M | ﹤0.01% |
3,900
+2,400
| +160% | +$1.02M |
|
|
MMAT
2057
CALL
DELISTED
Meta Materials Inc. Common Stock
MMAT
| $1.56M | ﹤0.01% |
13,133
+8,987
| +217% | +$1.19M |
|
|
MRTX
2058
DELISTED
Mirati Therapeutics, Inc. Common Stock
MRTX
| $1.56M | ﹤0.01% |
+34,488
| New | +$2.23M |
|
2059
PUT
Perion Network
PERI
$367M
| $1.56M | ﹤0.01% |
61,700
+30,400
| +97% | +$741K |
|
2060
M&T Bank
MTB
$36.2B
| $1.56M | ﹤0.01% |
10,759
+2,687
| +33% | +$442K |
|
|
ISEE
2061
PUT
DELISTED
IVERIC bio, Inc. Common Stock
ISEE
| $1.56M | ﹤0.01% |
72,900
-339,200
| -82% | -$7.24M |
|
2062
CALL
Stride
LRN
$3.69B
| $1.56M | ﹤0.01% |
49,800
-2,800
| -5% | -$103K |
|
2063
PUT
QuantumScape Corp
QS
$3B
| $1.56M | ﹤0.01% |
274,500
-287,700
| -51% | -$2.13M |
|
2064
State Street SPDR Portfolio S&P 500 Value ETF
SPYV
$36.1B
| $1.55M | ﹤0.01% |
40,007
-3,493
| -8% | -$134K |
|
2065
Invesco DB US Dollar Index Bearish Fund
UDN
$107M
| $1.55M | ﹤0.01% |
84,069
-62,773
| -43% | -$1.12M |
|
2066
CALL
Hewlett Packard
HPE
$63.2B
| $1.55M | ﹤0.01% |
97,200
-44,100
| -31% | -$650K |
|
|
UBX
2067
CALL
DELISTED
Unity Biotechnology
UBX
| $1.55M | ﹤0.01% |
566,300
+498,100
| +730% | +$1.45M |
|
2068
PUT
Prothena Corp
PRTA
$458M
| $1.55M | ﹤0.01% |
25,700
-52,500
| -67% | -$3.07M |
|
2069
CALL
Valaris
VAL
$5.51B
| $1.55M | ﹤0.01% |
22,900
-200
| -0.9% | -$12.5K |
|
2070
Rockwell Automation
ROK
$51.4B
| $1.55M | ﹤0.01% |
+6,009
| New | +$1.51M |
|
2071
CALL
Fomento Económico Mexicano
FMX
$43.3B
| $1.55M | ﹤0.01% |
19,800
+18,800
| +1,880% | +$1.38M |
|
2072
PUT
Orion
OEC
$394M
| $1.54M | ﹤0.01% |
86,800
-119,000
| -58% | -$2M |
|
2073
PUT
Agios Pharmaceuticals
AGIO
$2.16B
| $1.54M | ﹤0.01% |
54,900
-64,500
| -54% | -$1.82M |
|
2074
CALL
Aramark
ARMK
$15B
| $1.54M | ﹤0.01% |
51,522
+12,049
| +31% | +$332K |
|
2075
PUT
Starwood Property Trust
STWD
$6.12B
| $1.54M | ﹤0.01% |
83,900
-122,500
| -59% | -$2.44M |
|
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.