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 |
Walmart Inc
WMT
|
+$43.6M |
| 2 |
Apple
AAPL
|
+$40.9M |
| 3 |
VanEck Oil Services ETF
OIH
|
+$37.7M |
| 4 |
Citigroup
C
|
+$34.2M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$32.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Amazon
AMZN
|
+$189M |
| 2 |
Invesco QQQ Trust
QQQ
|
+$123M |
| 3 |
NVIDIA
NVDA
|
+$115M |
| 4 |
Tesla
TSLA
|
+$52M |
| 5 |
Meta Platforms (Facebook)
META
|
+$49M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.42% |
| 2 | Consumer Discretionary | 0.2% |
| 3 | Healthcare | 0.17% |
| 4 | Industrials | 0.15% |
| 5 | Communication Services | 0.13% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6001
Enlivex Ltd
ENLV
$35.2M
| $46K | ﹤0.01% |
848
+304
| +56% | +$18.3K |
|
|
FFWM
6002
PUT
DELISTED
First Foundation Inc
FFWM
| $46K | ﹤0.01% |
+6,200
| New | +$82.8K |
|
|
GMS
6003
PUT
DELISTED
GMS Inc
GMS
| $46K | ﹤0.01% |
800
+600
| +300% | +$34K |
|
6004
CALL
ICL Group
ICL
$6.53B
| $46K | ﹤0.01% |
6,800
+5,700
| +518% | +$42.1K |
|
6005
PUT
Limoneira
LMNR
$235M
| $46K | ﹤0.01% |
+2,800
| New | +$40.9K |
|
6006
Mueller Industries
MLI
$14.7B
| $46K | ﹤0.01% |
+2,508
| New | +$43.8K |
|
6007
CALL
Global X MSCI Norway ETF
NORW
$88M
| $46K | ﹤0.01% |
3,000
-1,800
| -38% | -$45.2K |
|
6008
PUT
Organogenesis Holdings
ORGO
$305M
| $46K | ﹤0.01% |
22,000
+16,500
| +300% | +$40.8K |
|
6009
CALL
Quest Resource Holding
QRHC
$26.8M
| $46K | ﹤0.01% |
7,600
+2,200
| +41% | +$14.1K |
|
|
RGLS
6010
CALL
DELISTED
Regulus Therapeutics
RGLS
| $46K | ﹤0.01% |
55,300
+25,100
| +83% | +$33.2K |
|
|
SGMO
6011
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $46K | ﹤0.01% |
26,400
-4,600
| -15% | -$13.1K |
|
6012
Spok Holdings
SPOK
$228M
| $46K | ﹤0.01% |
4,579
-7,731
| -63% | -$70.6K |
|
6013
PUT
StepStone Group
STEP
$3.61B
| $46K | ﹤0.01% |
+1,900
| New | +$51.9K |
|
|
VTYX
6014
PUT
DELISTED
Ventyx Biosciences
VTYX
| $46K | ﹤0.01% |
1,400
-100
| -7% | -$3.89K |
|
|
ONIT
6015
CALL
Onity Group
ONIT
$309M
| $46K | ﹤0.01% |
1,700
-4,500
| -73% | -$143K |
|
|
HCCI
6016
CALL
DELISTED
Heritage-Crystal Clean, Inc.
HCCI
| $46K | ﹤0.01% |
1,300
+900
| +225% | +$32.4K |
|
|
CVM.WS
6017
PUT
DELISTED
Cel-Sci Corp Series S
CVM.WS
| $46K | ﹤0.01% |
20,100
+4,000
| +25% | +$9.15K |
|
6018
CALL
Accel Entertainment
ACEL
$978M
| $45K | ﹤0.01% |
5,000
-9,100
| -65% | -$81.8K |
|
6019
Arrowhead Research
ARWR
$11.9B
| $45K | ﹤0.01% |
+1,786
| New | +$56.2K |
|
6020
PUT
Bioceres Crop Solutions
BIOX
$23M
| $45K | ﹤0.01% |
3,900
+1,800
| +86% | +$21.2K |
|
6021
CALL
Boot Barn
BOOT
$4.51B
| $45K | ﹤0.01% |
600
-33,400
| -98% | -$2.56M |
|
6022
CALL
ClearPoint Neuro
CLPT
$448M
| $45K | ﹤0.01% |
5,400
+4,200
| +350% | +$36.8K |
|
|
CMPS
6023
PUT
Compass Pathways
CMPS
$1.53B
| $45K | ﹤0.01% |
4,600
+100
| +2% | +$921 |
|
6024
CALL
Carlisle Companies
CSL
$14.3B
| $45K | ﹤0.01% |
200
+100
| +100% | +$24.3K |
|
6025
PUT
Citius Pharmaceuticals
CTXR
$15.6M
| $45K | ﹤0.01% |
1,544
-168
| -10% | -$4.84K |
|
Similar funds
Simplex Trading's Q1 2023 Portfolio in Review
As of Q1 2023, Simplex Trading held 10,803 positions worth $114B, up 24% from $91.9B the previous quarter. Its ten largest holdings account for 38% of the portfolio.
Simplex Trading deployed $10.1B of net new capital in Q1 2023, opening 1,536 new positions and adding to 3,665 existing holdings. Its largest new stake was Walmart Inc: 918,957 shares worth $45.2M.
By sector, the portfolio is most concentrated in Technology at 0.42% of assets, up from 0.35% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Meta Platforms (Facebook), an estimated $49M trimmed.
- Simplex Trading's largest Q1 2023 buy was Walmart Inc: 918,957 shares worth $45.2M.
- Simplex Trading added most to Apple in Q1 2023, an estimated $40.9M increase.
- Simplex Trading's biggest Q1 2023 reduction was Meta Platforms (Facebook), cutting an estimated $49M.
- Simplex Trading fully exited Amazon in Q1 2023, selling an estimated $189M.
- Simplex Trading's ten largest holdings make up 38% of its $114B portfolio in Q1 2023.
- Simplex Trading opened 1,536 new positions and closed 1,729 in Q1 2023.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $114B.
Based on Simplex Trading's 13F filing for Q1 2023, filed 27 Apr 2023.