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 | |
|---|---|---|---|---|---|---|
|
BRDG
5626
PUT
DELISTED
Bridge Investment Group
BRDG
| $66K | ﹤0.01% |
6,700
+1,200
| +22% | +$9.8K |
|
5627
CALL
Columbia Sportswear
COLM
$3.04B
| $66K | ﹤0.01% |
800
+600
| +300% | +$48.2K |
|
|
5628
PUT
Columbia Sportswear
COLM
$3.04B
| $66K | ﹤0.01% |
800
+500
| +167% | +$40.1K |
|
5629
CALL
Dime Commercial Bancshares
DCOM
$1.8B
| $66K | ﹤0.01% |
2,300
+1,900
| +475% | +$46.2K |
|
5630
PUT
3D Systems Corp
DDD
$431M
| $66K | ﹤0.01% |
23,500
-290,600
| -93% | -$836K |
|
|
GB
5631
PUT
DELISTED
Global Blue Group Holding
GB
| $66K | ﹤0.01% |
12,200
+6,300
| +107% | +$31.9K |
|
5632
PUT
Lamar Advertising Co
LAMR
$16.2B
| $66K | ﹤0.01% |
500
-200
| -29% | -$24.4K |
|
5633
NBT Bancorp
NBTB
$2.74B
| $66K | ﹤0.01% |
1,498
-1,303
| -47% | -$58.8K |
|
5634
PUT
PetMed Express
PETS
$41.7M
| $66K | ﹤0.01% |
18,100
+10,400
| +135% | +$36.8K |
|
5635
CALL
Perdoceo Education
PRDO
$1.99B
| $66K | ﹤0.01% |
3,000
+2,200
| +275% | +$49.5K |
|
5636
Banco Santander
SAN
$201B
| $66K | ﹤0.01% |
13,010
-11,129
| -46% | -$53.5K |
|
|
SCPH
5637
DELISTED
scPharmaceuticals
SCPH
| $66K | ﹤0.01% |
+14,618
| New | +$70.7K |
|
5638
PUT
Visteon
VC
$2.79B
| $66K | ﹤0.01% |
700
-700
| -50% | -$71.2K |
|
|
VRE
5639
PUT
DELISTED
Veris Residential
VRE
| $66K | ﹤0.01% |
3,700
+1,400
| +61% | +$23.1K |
|
|
NAPA
5640
PUT
DELISTED
The Duckhorn Portfolio, Inc.
NAPA
| $66K | ﹤0.01% |
11,400
-200
| -2% | -$1.32K |
|
5641
CALL
Alarm.com
ALRM
$2.71B
| $65K | ﹤0.01% |
1,200
+500
| +71% | +$30.7K |
|
5642
CALL
Armstrong World Industries
AWI
$7.38B
| $65K | ﹤0.01% |
500
-36,700
| -99% | -$4.54M |
|
5643
PUT
First Financial Bancorp
FFBC
$3.55B
| $65K | ﹤0.01% |
2,600
+1,200
| +86% | +$30.1K |
|
5644
GeoPark
GPRK
$633M
| $65K | ﹤0.01% |
8,335
-6,096
| -42% | -$55.8K |
|
5645
Kodiak Gas Services
KGS
$5.92B
| $65K | ﹤0.01% |
+2,274
| New | +$62.5K |
|
5646
CALL
Maximus
MMS
$3.17B
| $65K | ﹤0.01% |
+700
| New | +$62.6K |
|
5647
Microvision
MVIS
$6.21M
| $65K | ﹤0.01% |
57,748
+19,668
| +52% | +$20.4K |
|
5648
T-Rex 2X Long NVIDIA Daily Target ETF
NVDX
$436M
| $65K | ﹤0.01% |
+4,645
| New | +$66.9K |
|
5649
PUT
Reinsurance Group of America
RGA
$15.5B
| $65K | ﹤0.01% |
300
+100
| +50% | +$21.3K |
|
5650
CALL
Supernus Pharmaceuticals
SUPN
$2.59B
| $65K | ﹤0.01% |
2,100
+1,700
| +425% | +$53.1K |
|
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.