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 | |
|---|---|---|---|---|---|---|
|
AIMC
4376
DELISTED
Altra Industrial Motion Corp
AIMC
| $176K | ﹤0.01% |
+2,954
| New | +$155K |
|
4377
CALL
Assurant
AIZ
$13.9B
| $175K | ﹤0.01% |
1,400
-6,500
| -82% | -$866K |
|
4378
CALL
AerSale
ASLE
$291M
| $175K | ﹤0.01% |
10,800
-300
| -3% | -$5.21K |
|
4379
CALL
Diodes
DIOD
$3.5B
| $175K | ﹤0.01% |
2,300
+1,400
| +156% | +$110K |
|
4380
CALL
Gray Television
GTN
$437M
| $175K | ﹤0.01% |
15,700
+8,900
| +131% | +$110K |
|
4381
CALL
Telus
TU
$17.4B
| $175K | ﹤0.01% |
9,100
-68,000
| -88% | -$1.4M |
|
|
AGS
4382
CALL
DELISTED
PlayAGS
AGS
| $174K | ﹤0.01% |
34,300
+23,400
| +215% | +$132K |
|
|
CODX
4383
PUT
Co-Diagnostics
CODX
$5.56M
| $174K | ﹤0.01% |
2,303
-4
| -0.2% | -$375 |
|
4384
PUT
Joby Aviation
JOBY
$6.54B
| $174K | ﹤0.01% |
52,200
-13,000
| -20% | -$52.7K |
|
4385
CALL
Ternium
TX
$9.43B
| $174K | ﹤0.01% |
5,700
-8,600
| -60% | -$257K |
|
4386
CALL
Algonquin Power & Utilities
AQN
$4.59B
| $173K | ﹤0.01% |
26,600
-55,900
| -68% | -$498K |
|
4387
PUT
Capricor Therapeutics
CAPR
$380M
| $173K | ﹤0.01% |
45,000
-9,900
| -18% | -$47.3K |
|
4388
CALL
CubeSmart
CUBE
$9.61B
| $173K | ﹤0.01% |
4,300
+2,700
| +169% | +$109K |
|
4389
FTC Solar
FTCI
$41.6M
| $173K | ﹤0.01% |
6,474
+4,873
| +304% | +$115K |
|
4390
International Seaways
INSW
$4.68B
| $173K | ﹤0.01% |
+4,674
| New | +$189K |
|
4391
PUT
Jackson Financial
JXN
$8.4B
| $173K | ﹤0.01% |
5,000
+2,300
| +85% | +$79.9K |
|
4392
CALL
Limbach Holdings
LMB
$807M
| $173K | ﹤0.01% |
16,700
+10,000
| +149% | +$95.2K |
|
4393
Pulmonx
LUNG
$52.8M
| $173K | ﹤0.01% |
+20,627
| New | +$196K |
|
|
CALY
4394
Callaway Golf Company
CALY
$3.28B
| $173K | ﹤0.01% |
+8,780
| New | +$173K |
|
4395
Progress Software
PRGS
$1.75B
| $173K | ﹤0.01% |
+3,434
| New | +$171K |
|
|
SCS
4396
PUT
DELISTED
Steelcase
SCS
| $173K | ﹤0.01% |
24,600
+23,000
| +1,438% | +$170K |
|
4397
PUT
Petco
WOOF
$797M
| $173K | ﹤0.01% |
18,300
-54,300
| -75% | -$557K |
|
|
PFSW
4398
DELISTED
PFSweb, Inc.
PFSW
| $173K | ﹤0.01% |
+28,221
| New | +$264K |
|
4399
PUT
Appian
APPN
$2.11B
| $172K | ﹤0.01% |
5,300
-24,000
| -82% | -$947K |
|
4400
PUT
Excelerate Energy
EE
$1.19B
| $172K | ﹤0.01% |
6,900
+3,300
| +92% | +$86.6K |
|
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.