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 | |
|---|---|---|---|---|---|---|
4301
CALL
Old Republic International
ORI
$10.8B
| $251K | ﹤0.01% |
7,100
+5,100
| +255% | +$173K |
|
4302
CALL
Accel Entertainment
ACEL
$1.01B
| $250K | ﹤0.01% |
21,600
| – | – |
|
4303
CALL
Community Health Systems
CYH
$391M
| $250K | ﹤0.01% |
41,300
-34,000
| -45% | -$167K |
|
4304
Madrigal Pharmaceuticals
MDGL
$12.6B
| $250K | ﹤0.01% |
1,179
-2,393
| -67% | -$612K |
|
4305
PUT
Middleby
MIDD
$6.01B
| $250K | ﹤0.01% |
1,800
-200
| -10% | -$26.9K |
|
4306
CALL
Safe Bulkers
SB
$812M
| $250K | ﹤0.01% |
48,300
-18,200
| -27% | -$93.6K |
|
4307
PUT
GeneDx Holdings
WGS
$1.84B
| $250K | ﹤0.01% |
5,900
-100
| -2% | -$3.38K |
|
|
BDN
4308
PUT
Brandywine Realty Trust
BDN
$519M
| $249K | ﹤0.01% |
45,900
+33,800
| +279% | +$168K |
|
4309
PUT
Kimbell Royalty Partners
KRP
$1.45B
| $249K | ﹤0.01% |
15,500
-2,800
| -15% | -$45.1K |
|
4310
PUT
Amplify Energy
AMPY
$155M
| $248K | ﹤0.01% |
38,000
-10,200
| -21% | -$70.7K |
|
4311
CALL
FuelCell Energy
FCEL
$1.68B
| $248K | ﹤0.01% |
21,757
+12,127
| +126% | +$180K |
|
|
LAND
4312
PUT
Gladstone Land Corp
LAND
$367M
| $248K | ﹤0.01% |
17,900
+13,600
| +316% | +$192K |
|
4313
CALL
LGI Homes
LGIH
$1.39B
| $248K | ﹤0.01% |
2,100
+700
| +50% | +$73.8K |
|
4314
Neonode
NEON
$12.9M
| $248K | ﹤0.01% |
27,287
+26,713
| +4,654% | +$136K |
|
|
VLRS
4315
Controladora Vuela Compania de Aviacion
VLRS
$890M
| $248K | ﹤0.01% |
39,245
+38,298
| +4,044% | +$233K |
|
|
XELA
4316
CALL
DELISTED
Exela Technologies, Inc. Common Stock
XELA
| $248K | ﹤0.01% |
120,400
-300
| -0.2% | -$659 |
|
|
VISN
4317
Vistance Networks Inc
VISN
$2.66B
| $247K | ﹤0.01% |
40,460
-28,121
| -41% | -$96.4K |
|
4318
Globalstar
GSAT
$10.2B
| $247K | ﹤0.01% |
+13,308
| New | +$246K |
|
4319
CALL
Paysign
PAYS
$515M
| $247K | ﹤0.01% |
67,400
+64,400
| +2,147% | +$293K |
|
4320
CALL
Pembina Pipeline
PBA
$29.3B
| $247K | ﹤0.01% |
6,000
-22,900
| -79% | -$895K |
|
|
SFIX
4321
CALL
Stitch Fix
SFIX
$563M
| $247K | ﹤0.01% |
87,600
+61,500
| +236% | +$239K |
|
4322
PUT
Ecopetrol
EC
$33.2B
| $246K | ﹤0.01% |
27,600
+2,000
| +8% | +$20.2K |
|
4323
CALL
Televisa
TV
$1.49B
| $246K | ﹤0.01% |
96,500
+26,300
| +37% | +$57.6K |
|
|
LADR
4324
PUT
Ladder Capital
LADR
$1.24B
| $244K | ﹤0.01% |
21,100
+15,200
| +258% | +$180K |
|
4325
Aaon
AAON
$7.48B
| $243K | ﹤0.01% |
2,254
-4,719
| -68% | -$431K |
|
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.