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 |
Boeing
BA
|
+$55.8M |
| 2 |
Microsoft
MSFT
|
+$42.2M |
| 3 |
Pinduoduo
PDD
|
+$41.3M |
| 4 |
Apple
AAPL
|
+$32M |
| 5 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$28.3M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$95.2M |
| 2 |
Citigroup
C
|
+$57.2M |
| 3 |
Pfizer
PFE
|
+$56.4M |
| 4 |
TSMC
TSM
|
+$39.7M |
| 5 |
Starbucks
SBUX
|
+$35.5M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.4% |
| 2 | Consumer Discretionary | 0.29% |
| 3 | Healthcare | 0.15% |
| 4 | Industrials | 0.13% |
| 5 | Financials | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
7101
CALL
Amtech Systems
ASYS
$257M
| $11K | ﹤0.01% |
1,900
+600
| +46% | +$3.65K |
|
7102
PUT
Belden
BDC
$4.09B
| $11K | ﹤0.01% |
100
| – | – |
|
|
CMRC
7103
CALL
Commerce.com Inc Series 1
CMRC
$264M
| $11K | ﹤0.01% |
1,900
-21,400
| -92% | -$141K |
|
7104
Bio-Rad Laboratories Class A
BIO
$8.86B
| $11K | ﹤0.01% |
35
-3,154
| -99% | -$1M |
|
7105
Pathward Financial
CASH
$1.87B
| $11K | ﹤0.01% |
+167
| New | +$10.7K |
|
7106
CALL
Community Bank
CBU
$3.41B
| $11K | ﹤0.01% |
200
-100
| -33% | -$5.73K |
|
|
CCC
7107
PUT
CCC Intelligent Solutions
CCC
$3.59B
| $11K | ﹤0.01% |
1,000
| – | – |
|
7108
Clear Channel Outdoor Holdings
CCO
$1.23B
| $11K | ﹤0.01% |
7,099
-2,697
| -28% | -$4.22K |
|
7109
Compañía de Cervecerías Unidas
CCU
$2.2B
| $11K | ﹤0.01% |
+977
| New | +$10.9K |
|
7110
Coherus Oncology
CHRS
$222M
| $11K | ﹤0.01% |
11,367
-88,880
| -89% | -$122K |
|
|
CKPT
7111
PUT
DELISTED
Checkpoint Therapeutics
CKPT
| $11K | ﹤0.01% |
5,000
-2,000
| -29% | -$4.62K |
|
7112
VanEck Digital Transformation ETF
DAPP
$236M
| $11K | ﹤0.01% |
1,016
-13,210
| -93% | -$153K |
|
|
ELEV
7113
DELISTED
Elevation Oncology
ELEV
| $11K | ﹤0.01% |
19,500
+19,353
| +13,165% | +$28.7K |
|
7114
CALL
Fidus Investment
FDUS
$766M
| $11K | ﹤0.01% |
600
-2,100
| -78% | -$41.3K |
|
7115
CALL
Health Catalyst
HCAT
$158M
| $11K | ﹤0.01% |
+1,400
| New | +$10.1K |
|
7116
HBT Financial
HBT
$1.31B
| $11K | ﹤0.01% |
547
+412
| +305% | +$9.03K |
|
7117
PUT
indie Semiconductor
INDI
$678M
| $11K | ﹤0.01% |
2,900
-93,800
| -97% | -$456K |
|
7118
CALL
Jasper Therapeutics
JSPR
$21.1M
| $11K | ﹤0.01% |
600
+300
| +100% | +$5.97K |
|
7119
PUT
Korea Electric Power
KEP
$14.9B
| $11K | ﹤0.01% |
+1,500
| New | +$11.4K |
|
7120
CALL
Keros Therapeutics
KROS
$199M
| $11K | ﹤0.01% |
200
-2,900
| -94% | -$143K |
|
7121
Lightbridge
LTBR
$259M
| $11K | ﹤0.01% |
3,985
-3,450
| -46% | -$10K |
|
7122
Lantern Pharma
LTRN
$33.2M
| $11K | ﹤0.01% |
3,104
-96
| -3% | -$395 |
|
7123
CALL
LiveOne
LVO
$65.1M
| $11K | ﹤0.01% |
1,180
-2,000
| -63% | -$30.1K |
|
7124
PUT
Pediatrix Medical
MD
$2.21B
| $11K | ﹤0.01% |
1,000
-800
| -44% | -$7.54K |
|
7125
CALL
MoneyHero
MNY
$43.1M
| $11K | ﹤0.01% |
11,000
-1,400
| -11% | -$1.94K |
|
Similar funds
Simplex Trading's Q3 2024 Portfolio in Review
As of Q3 2024, Simplex Trading held 9,964 positions worth $170B, up 5.3% from $162B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q3 2024 filing shows 1,185 new, 3,232 increased, 3,829 reduced and 1,476 closed positions. Its largest new stake was Boeing: 325,328 shares worth $49.5M. The largest sale was Broadcom, an estimated $95.2M.
By sector, the portfolio is most concentrated in Technology at 0.4% of assets, down from 0.53% a quarter earlier, followed by Consumer Discretionary and Healthcare.
- Simplex Trading's largest Q3 2024 buy was Boeing: 325,328 shares worth $49.5M.
- Simplex Trading added most to Pinduoduo in Q3 2024, an estimated $41.3M increase.
- Simplex Trading's biggest Q3 2024 reduction was Citigroup, cutting an estimated $57.2M.
- Simplex Trading fully exited Broadcom in Q3 2024, selling an estimated $95.2M.
- Simplex Trading's ten largest holdings make up 50% of its $170B portfolio in Q3 2024.
- Simplex Trading opened 1,185 new positions and closed 1,476 in Q3 2024.
- Simplex Trading's portfolio value rose 5.3% quarter-over-quarter to $170B.
Based on Simplex Trading's 13F filing for Q3 2024, filed 8 Nov 2024.