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 | |
|---|---|---|---|---|---|---|
4451
CALL
Zentalis Pharmaceuticals
ZNTL
$332M
| $167K | ﹤0.01% |
8,300
-900
| -10% | -$19.4K |
|
|
DO
4452
PUT
DELISTED
Diamond Offshore Drilling, Inc.
DO
| $167K | ﹤0.01% |
16,100
-95,200
| -86% | -$871K |
|
4453
CALL
Citi Trends
CTRN
$555M
| $166K | ﹤0.01% |
6,300
+1,100
| +21% | +$25.9K |
|
4454
PUT
Eve Holding
EVEX
$777M
| $166K | ﹤0.01% |
23,100
-500
| -2% | -$4.36K |
|
|
IPG
4455
PUT
DELISTED
Interpublic Group of Companies
IPG
| $166K | ﹤0.01% |
5,000
+3,500
| +233% | +$109K |
|
4456
PUT
St. Joe Company
JOE
$3.55B
| $166K | ﹤0.01% |
4,300
-3,600
| -46% | -$129K |
|
|
MESO
4457
Mesoblast
MESO
$1.83B
| $166K | ﹤0.01% |
28,624
+1,446
| +5% | +$9.04K |
|
4458
Saic
SAIC
$4.95B
| $166K | ﹤0.01% |
1,503
+1,307
| +667% | +$138K |
|
|
VGR
4459
PUT
DELISTED
Vector Group Ltd.
VGR
| $166K | ﹤0.01% |
14,000
+11,900
| +567% | +$126K |
|
4460
PUT
Century Casinos
CNTY
$32.9M
| $165K | ﹤0.01% |
+23,500
| New | +$172K |
|
4461
PUT
Denison Mines
DNN
$2.43B
| $165K | ﹤0.01% |
144,100
-182,300
| -56% | -$216K |
|
|
EFC
4462
CALL
Ellington Financial
EFC
$1.69B
| $165K | ﹤0.01% |
13,400
-55,700
| -81% | -$726K |
|
4463
Ionis Pharmaceuticals
IONS
$8.93B
| $165K | ﹤0.01% |
+4,370
| New | +$184K |
|
|
NIU
4464
PUT
Niu Technologies
NIU
$200M
| $165K | ﹤0.01% |
31,700
-500
| -2% | -$1.92K |
|
|
TEN
4465
Tsakos Energy Navigation Ltd
TEN
$1.19B
| $165K | ﹤0.01% |
+9,772
| New | +$171K |
|
|
ARAV
4466
CALL
DELISTED
Aravive, Inc. Common Stock
ARAV
| $165K | ﹤0.01% |
125,500
+116,100
| +1,235% | +$148K |
|
|
KDNY
4467
CALL
DELISTED
Chinook Therapeutics, Inc. Common Stock
KDNY
| $165K | ﹤0.01% |
6,300
-600
| -9% | -$13.3K |
|
|
AMRN
4468
PUT
Amarin Corp
AMRN
$297M
| $164K | ﹤0.01% |
6,780
-650
| -9% | -$15.6K |
|
4469
PUT
Brighthouse Financial
BHF
$3.61B
| $164K | ﹤0.01% |
3,200
-81,700
| -96% | -$4.27M |
|
4470
Direxion Daily CSI 300 China A Share Bull 2X ETF
CHAU
$87.8M
| $164K | ﹤0.01% |
8,151
+3,702
| +83% | +$70.4K |
|
4471
CALL
Green Dot
GDOT
$750M
| $164K | ﹤0.01% |
10,400
-600
| -5% | -$11.1K |
|
4472
PUT
Lifecore Biomedical
LFCR
$162M
| $164K | ﹤0.01% |
+25,400
| New | +$209K |
|
4473
PUT
Magnite
MGNI
$2.83B
| $164K | ﹤0.01% |
15,500
-21,700
| -58% | -$198K |
|
4474
PUT
Movado Group
MOV
$840M
| $164K | ﹤0.01% |
5,100
-2,100
| -29% | -$67K |
|
4475
PUT
SIGA Technologies
SIGA
$240M
| $164K | ﹤0.01% |
22,400
-27,800
| -55% | -$244K |
|
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.