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 | |
|---|---|---|---|---|---|---|
1801
CALL
Old Republic International
ORI
$10.3B
| $2.17M | ﹤0.01% |
90,000
+50,800
| +130% | +$1.19M |
|
1802
PUT
Hyatt Hotels
H
$17.6B
| $2.17M | ﹤0.01% |
24,000
-2,000
| -8% | -$184K |
|
1803
Lennar Class A
LEN
$20.4B
| $2.17M | ﹤0.01% |
24,713
-5,708
| -19% | -$462K |
|
1804
United States Natural Gas Fund
UNG
$470M
| $2.17M | ﹤0.01% |
38,401
+17,539
| +84% | +$1.39M |
|
|
WCC
1805
CALL
WESCO International
WCC
$16.2B
| $2.17M | ﹤0.01% |
17,300
+1,900
| +12% | +$239K |
|
1806
Harley-Davidson
HOG
$2.68B
| $2.16M | ﹤0.01% |
+51,878
| New | +$2.21M |
|
1807
CALL
Abercrombie & Fitch
ANF
$4.17B
| $2.15M | ﹤0.01% |
94,000
+64,100
| +214% | +$1.26M |
|
1808
CALL
Zebra Technologies
ZBRA
$12.4B
| $2.15M | ﹤0.01% |
8,400
-20,400
| -71% | -$5.27M |
|
|
TELL
1809
CALL
DELISTED
Tellurian Inc.
TELL
| $2.15M | ﹤0.01% |
1,280,900
+74,700
| +6% | +$187K |
|
|
TIGR
1810
CALL
UP Fintech Holding
TIGR
$845M
| $2.15M | ﹤0.01% |
630,500
+190,800
| +43% | +$826K |
|
1811
PUT
CoreCivic
CXW
$3.1B
| $2.15M | ﹤0.01% |
185,900
+14,800
| +9% | +$164K |
|
1812
Global X Lithium & Battery Tech ETF
LIT
$1.49B
| $2.14M | ﹤0.01% |
36,460
-40,130
| -52% | -$2.68M |
|
1813
PUT
Amylyx Pharmaceuticals
AMLX
$2.05B
| $2.13M | ﹤0.01% |
57,800
-44,700
| -44% | -$1.59M |
|
1814
PUT
Lantheus
LNTH
$6.82B
| $2.13M | ﹤0.01% |
41,900
-21,000
| -33% | -$1.3M |
|
1815
CALL
Blackstone Mortgage Trust
BXMT
$2.82B
| $2.13M | ﹤0.01% |
100,700
+36,600
| +57% | +$867K |
|
1816
CALL
Boot Barn
BOOT
$4.55B
| $2.13M | ﹤0.01% |
34,000
+27,800
| +448% | +$1.67M |
|
1817
PUT
Ericsson
ERIC
$30.7B
| $2.13M | ﹤0.01% |
364,000
+238,200
| +189% | +$1.43M |
|
|
EDR
1818
CALL
DELISTED
Endeavor Group Holdings, Inc.
EDR
| $2.13M | ﹤0.01% |
94,300
-186,400
| -66% | -$3.97M |
|
1819
PUT
Chemours
CC
$2.59B
| $2.12M | ﹤0.01% |
69,300
-67,500
| -49% | -$2.03M |
|
1820
CALL
Monolithic Power Systems
MPWR
$65.5B
| $2.12M | ﹤0.01% |
6,000
-7,400
| -55% | -$2.66M |
|
|
1821
PUT
Monolithic Power Systems
MPWR
$65.5B
| $2.12M | ﹤0.01% |
6,000
+4,300
| +253% | +$1.54M |
|
|
CTRA
1822
PUT
DELISTED
Coterra Energy
CTRA
| $2.12M | ﹤0.01% |
86,300
-47,500
| -36% | -$1.31M |
|
|
CMA
1823
CALL
DELISTED
Comerica
CMA
| $2.11M | ﹤0.01% |
31,600
+17,100
| +118% | +$1.18M |
|
1824
PUT
Guardant Health
GH
$19.5B
| $2.11M | ﹤0.01% |
77,600
-19,200
| -20% | -$879K |
|
1825
Alnylam Pharmaceuticals
ALNY
$36.3B
| $2.11M | ﹤0.01% |
8,877
+8,868
| +98,533% | +$1.89M |
|
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.