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 | |
|---|---|---|---|---|---|---|
4551
US Global Jets ETF
JETS
$768M
| $153K | ﹤0.01% |
9,015
-12,835
| -59% | -$224K |
|
4552
Pitney Bowes
PBI
$2.39B
| $153K | ﹤0.01% |
40,439
-659
| -2% | -$2.22K |
|
4553
CALL
Sportradar
SRAD
$4.42B
| $153K | ﹤0.01% |
15,400
+8,600
| +126% | +$83.9K |
|
4554
PUT
Theravance Biopharma
TBPH
$873M
| $153K | ﹤0.01% |
13,700
-72,200
| -84% | -$759K |
|
4555
PUT
Utz Brands
UTZ
$1.24B
| $153K | ﹤0.01% |
9,700
+4,500
| +87% | +$74.6K |
|
|
EVBG
4556
PUT
DELISTED
Everbridge, Inc. Common Stock
EVBG
| $153K | ﹤0.01% |
5,200
-20,600
| -80% | -$632K |
|
4557
Allstate
ALL
$70.6B
| $152K | ﹤0.01% |
1,127
-5,322
| -83% | -$696K |
|
4558
CALL
A10 Networks
ATEN
$2.07B
| $152K | ﹤0.01% |
9,200
-45,600
| -83% | -$781K |
|
4559
Direxion Daily Real Estate Bear 3X ETF
DRV
$25M
| $152K | ﹤0.01% |
2,830
-7,627
| -73% | -$450K |
|
4560
PUT
GoodRx Holdings
GDRX
$1.09B
| $152K | ﹤0.01% |
32,700
-36,900
| -53% | -$182K |
|
4561
PUT
Global Net Lease
GNL
$1.87B
| $152K | ﹤0.01% |
12,100
+2,700
| +29% | +$33.5K |
|
4562
CALL
Mitek Systems
MITK
$756M
| $152K | ﹤0.01% |
15,700
-15,000
| -49% | -$158K |
|
4563
PUT
MGIC Investment
MTG
$6.47B
| $152K | ﹤0.01% |
11,700
+4,100
| +54% | +$53.9K |
|
4564
CALL
VOC Energy
VOC
$56.4M
| $152K | ﹤0.01% |
14,700
-23,100
| -61% | -$202K |
|
|
LUNA
4565
CALL
DELISTED
Luna Innovations Incorporated
LUNA
| $152K | ﹤0.01% |
17,300
-15,000
| -46% | -$95.1K |
|
4566
CALL
American Financial Group
AFG
$11.9B
| $151K | ﹤0.01% |
1,100
+300
| +38% | +$41.1K |
|
4567
CALL
Apogee Enterprises
APOG
$833M
| $151K | ﹤0.01% |
3,400
+1,500
| +79% | +$67.6K |
|
|
LX
4568
CALL
LexinFintech Holdings
LX
$246M
| $151K | ﹤0.01% |
79,500
+11,300
| +17% | +$18.9K |
|
4569
PUT
Navient
NAVI
$819M
| $151K | ﹤0.01% |
9,200
-2,700
| -23% | -$42.7K |
|
|
NVNO
4570
CALL
enVVeno Medical
NVNO
$6.94M
| $151K | ﹤0.01% |
849
-1,431
| -63% | -$291K |
|
4571
CALL
OSI Systems
OSIS
$3.53B
| $151K | ﹤0.01% |
1,900
-37,600
| -95% | -$3.06M |
|
4572
CALL
Patrick Industries
PATK
$2.87B
| $151K | ﹤0.01% |
3,750
-300
| -7% | -$10.4K |
|
4573
PUT
Rhythm Pharmaceuticals
RYTM
$7.31B
| $151K | ﹤0.01% |
5,200
-19,500
| -79% | -$501K |
|
4574
Sweetgreen
SG
$756M
| $151K | ﹤0.01% |
17,734
+13,583
| +327% | +$198K |
|
4575
CALL
Workiva
WK
$3.45B
| $151K | ﹤0.01% |
1,800
-300
| -14% | -$23.2K |
|
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.