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 | |
|---|---|---|---|---|---|---|
4126
Coherent
COHR
$45.2B
| $216K | ﹤0.01% |
6,182
+3,634
| +143% | +$126K |
|
4127
Warrior Met Coal
HCC
$4.22B
| $216K | ﹤0.01% |
6,241
-8,204
| -57% | -$290K |
|
4128
Riot Platforms
RIOT
$7.45B
| $216K | ﹤0.01% |
63,977
+53,877
| +533% | +$278K |
|
4129
Rambus
RMBS
$9.59B
| $216K | ﹤0.01% |
+6,034
| New | +$204K |
|
|
SCS
4130
DELISTED
Steelcase
SCS
| $216K | ﹤0.01% |
+30,609
| New | +$226K |
|
4131
PUT
Dorchester Minerals
DMLP
$1.29B
| $215K | ﹤0.01% |
7,200
+4,500
| +167% | +$129K |
|
4132
PUT
Advanced Energy
AEIS
$10.5B
| $214K | ﹤0.01% |
2,500
+300
| +14% | +$25.2K |
|
4133
CALL
Federal Agricultural Mortgage Class A
AGM.A
| $214K | ﹤0.01% |
+1,900
| New | +$192K |
|
4134
Baxter International
BAX
$12.8B
| $214K | ﹤0.01% |
+4,199
| New | +$226K |
|
|
MCW
4135
CALL
DELISTED
Mister Car Wash
MCW
| $214K | ﹤0.01% |
23,200
-140,200
| -86% | -$1.3M |
|
4136
CALL
Babcock & Wilcox
BW
$1.25B
| $213K | ﹤0.01% |
37,000
+6,400
| +21% | +$35K |
|
4137
CALL
Celldex Therapeutics
CLDX
$2.93B
| $213K | ﹤0.01% |
4,800
-2,300
| -32% | -$82.1K |
|
4138
CALL
Duolingo
DUOL
$6.62B
| $213K | ﹤0.01% |
3,000
-11,900
| -80% | -$929K |
|
|
ARNC
4139
CALL
DELISTED
Arconic Corporation
ARNC
| $213K | ﹤0.01% |
10,100
-5,700
| -36% | -$119K |
|
4140
CALL
Blackstone Secured Lending
BXSL
$5.4B
| $212K | ﹤0.01% |
+9,500
| New | +$223K |
|
4141
PUT
First Industrial Realty Trust
FR
$8.76B
| $212K | ﹤0.01% |
+4,400
| New | +$210K |
|
4142
PUT
Hess Midstream
HESM
$5.19B
| $212K | ﹤0.01% |
7,100
+400
| +6% | +$11.4K |
|
4143
Invesco Mortgage Capital
IVR
$764M
| $212K | ﹤0.01% |
16,722
+16,712
| +167,120% | +$204K |
|
4144
CALL
KLX Energy Services
KLXE
$43.1M
| $212K | ﹤0.01% |
12,300
-15,600
| -56% | -$220K |
|
4145
PUT
Pitney Bowes
PBI
$2.44B
| $212K | ﹤0.01% |
56,000
+18,200
| +48% | +$61.3K |
|
4146
Ryanair
RYAAY
$30.4B
| $212K | ﹤0.01% |
+7,090
| New | +$201K |
|
4147
PUT
Western Midstream Partners
WES
$19.5B
| $212K | ﹤0.01% |
7,900
-27,900
| -78% | -$752K |
|
|
CIM
4148
PUT
Chimera Investment
CIM
$1.07B
| $211K | ﹤0.01% |
12,833
-5,300
| -29% | -$98.8K |
|
4149
PUT
Kimco Realty
KIM
$17.6B
| $211K | ﹤0.01% |
10,000
-9,600
| -49% | -$202K |
|
4150
CALL
Landstar System
LSTR
$6.08B
| $211K | ﹤0.01% |
1,300
+600
| +86% | +$96.3K |
|
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.