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 | |
|---|---|---|---|---|---|---|
3401
CALL
Bain Capital Specialty
BCSF
$815M
| $444K | ﹤0.01% |
37,300
+33,400
| +856% | +$427K |
|
3402
CALL
La-Z-Boy
LZB
$1.62B
| $444K | ﹤0.01% |
15,300
+5,700
| +59% | +$162K |
|
3403
CALL
Apple Hospitality REIT
APLE
$3.98B
| $443K | ﹤0.01% |
28,600
+10,800
| +61% | +$177K |
|
|
HOLX
3404
PUT
DELISTED
Hologic
HOLX
| $443K | ﹤0.01% |
5,500
-10,700
| -66% | -$861K |
|
|
AGEN
3405
CALL
Agenus
AGEN
$255M
| $442K | ﹤0.01% |
14,842
-4,922
| -25% | -$208K |
|
3406
PUT
Westrock Coffee
WEST
$769M
| $441K | ﹤0.01% |
36,100
-82,400
| -70% | -$1.01M |
|
|
VRNT
3407
DELISTED
Verint Systems
VRNT
| $440K | ﹤0.01% |
11,816
+5,763
| +95% | +$215K |
|
|
MTTR
3408
PUT
DELISTED
Matterport, Inc. Class A Common Stock
MTTR
| $440K | ﹤0.01% |
161,200
+131,200
| +437% | +$401K |
|
3409
PUT
Green Dot
GDOT
$746M
| $438K | ﹤0.01% |
25,500
+15,600
| +158% | +$273K |
|
3410
CALL
Gossamer Bio
GOSS
$97.5M
| $438K | ﹤0.01% |
347,700
+314,700
| +954% | +$602K |
|
|
EFC
3411
CALL
Ellington Financial
EFC
$1.68B
| $437K | ﹤0.01% |
35,800
+22,400
| +167% | +$289K |
|
3412
PUT
iShares Gold Trust
IAU
$63.4B
| $437K | ﹤0.01% |
11,700
+9,500
| +432% | +$341K |
|
3413
CALL
Webster Financial
WBS
$12.5B
| $437K | ﹤0.01% |
11,100
+3,500
| +46% | +$168K |
|
3414
CALL
Xerox
XRX
$357M
| $437K | ﹤0.01% |
28,400
+1,600
| +6% | +$25.9K |
|
3415
CALL
BioXcel Therapeutics
BTAI
$26.8M
| $436K | ﹤0.01% |
1,463
+1,057
| +260% | +$451K |
|
3416
PUT
Cognex
CGNX
$10.2B
| $436K | ﹤0.01% |
8,800
+7,500
| +577% | +$380K |
|
|
OLPX
3417
DELISTED
Olaplex Holdings
OLPX
| $436K | ﹤0.01% |
102,294
+38,075
| +59% | +$203K |
|
3418
Patrick Industries
PATK
$2.81B
| $436K | ﹤0.01% |
9,509
+8,178
| +614% | +$379K |
|
|
HCP
3419
CALL
DELISTED
HashiCorp, Inc. Class A Common Stock
HCP
| $436K | ﹤0.01% |
14,900
+5,800
| +64% | +$173K |
|
|
LTC
3420
PUT
LTC Properties
LTC
$2.15B
| $432K | ﹤0.01% |
12,300
+1,000
| +9% | +$36K |
|
3421
PUT
Immunocore
IMCR
$1.72B
| $430K | ﹤0.01% |
8,700
+7,800
| +867% | +$439K |
|
3422
PUT
NeoGenomics
NEO
$1.71B
| $430K | ﹤0.01% |
24,700
+6,200
| +34% | +$88.3K |
|
|
GGRP
3423
CALL
Glimpse Group
GGRP
$20.3M
| $430K | ﹤0.01% |
114,400
+114,000
| +28,500% | +$461K |
|
|
SWN
3424
PUT
DELISTED
Southwestern Energy Company
SWN
| $430K | ﹤0.01% |
86,100
-234,900
| -73% | -$1.25M |
|
|
BRSL
3425
Brightstar Lottery PLC
BRSL
$1.93B
| $429K | ﹤0.01% |
16,008
-26,989
| -63% | -$691K |
|
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.