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 |
Amazon
AMZN
|
+$113M |
| 2 |
SPDR Gold Trust
GLD
|
+$68.6M |
| 3 |
NVIDIA
NVDA
|
+$63.4M |
| 4 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$55.2M |
| 5 |
Apple
AAPL
|
+$54.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Netflix
NFLX
|
+$27.1M |
| 2 |
Qualcomm
QCOM
|
+$24.6M |
| 3 |
Walt Disney
DIS
|
+$21.2M |
| 4 |
Advanced Micro Devices
AMD
|
+$18.2M |
| 5 |
Snowflake
SNOW
|
+$16.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.44% |
| 2 | Consumer Discretionary | 0.32% |
| 3 | Healthcare | 0.22% |
| 4 | Financials | 0.17% |
| 5 | Communication Services | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
6001
ProShares Ultra Technology
ROM
$1.12B
| $40K | ﹤0.01% |
1,032
+413
| +67% | +$17.9K |
|
6002
CALL
Simmons First National
SFNC
$3.41B
| $40K | ﹤0.01% |
2,400
| – | – |
|
6003
PUT
Sensient Technologies
SXT
$5.26B
| $40K | ﹤0.01% |
+700
| New | +$44.1K |
|
6004
Transact Technologies
TACT
$53.2M
| $40K | ﹤0.01% |
6,364
+5,150
| +424% | +$38.9K |
|
|
TGI
6005
CALL
DELISTED
Triumph Group
TGI
| $40K | ﹤0.01% |
5,300
-21,400
| -80% | -$209K |
|
|
GGRP
6006
Glimpse Group
GGRP
$18.8M
| $40K | ﹤0.01% |
21,782
-3,996
| -16% | -$13.3K |
|
6007
PUT
Cactus
WHD
$5.21B
| $40K | ﹤0.01% |
800
-9,800
| -92% | -$493K |
|
|
AAMI
6008
CALL
Acadian Asset Management
AAMI
$3.08B
| $40K | ﹤0.01% |
2,100
| – | – |
|
|
EGIO
6009
PUT
DELISTED
Edgio, Inc. Common Stock
EGIO
| $40K | ﹤0.01% |
1,190
+65
| +6% | +$2.04K |
|
|
NGMS
6010
PUT
DELISTED
NeoGames S.A. Ordinary Shares
NGMS
| $40K | ﹤0.01% |
1,500
-600
| -29% | -$16.2K |
|
|
YELL
6011
DELISTED
Yellow Corporation Common Stock
YELL
| $40K | ﹤0.01% |
28,493
+18,350
| +181% | +$28.6K |
|
6012
CALL
Aaon
AAON
$7.3B
| $39K | ﹤0.01% |
700
+250
| +56% | +$15.9K |
|
6013
CALL
Acacia Research
ACTG
$428M
| $39K | ﹤0.01% |
10,900
-2,200
| -17% | -$8.41K |
|
6014
PUT
BOK Financial
BOKF
$8.58B
| $39K | ﹤0.01% |
+500
| New | +$42.3K |
|
6015
CALL
CION Investment
CION
$297M
| $39K | ﹤0.01% |
3,700
-5,500
| -60% | -$59.5K |
|
6016
CALL
Compass
COMP
$8.51B
| $39K | ﹤0.01% |
13,700
-33,900
| -71% | -$120K |
|
6017
PUT
Curis
CRIS
$9.78M
| $39K | ﹤0.01% |
300
+279
| +1,329% | +$71.8K |
|
|
EHAB
6018
PUT
DELISTED
Enhabit
EHAB
| $39K | ﹤0.01% |
3,500
+3,200
| +1,067% | +$40.3K |
|
6019
CALL
Embecta
EMBC
$216M
| $39K | ﹤0.01% |
2,600
+2,300
| +767% | +$43.1K |
|
6020
PUT
Enerpac Tool Group
EPAC
$1.83B
| $39K | ﹤0.01% |
1,500
+1,100
| +275% | +$29.4K |
|
6021
Graco
GGG
$12.9B
| $39K | ﹤0.01% |
539
+195
| +57% | +$15.4K |
|
6022
CALL
Ingredion
INGR
$6.27B
| $39K | ﹤0.01% |
400
+200
| +100% | +$20.7K |
|
6023
CALL
LivePerson
LPSN
$21.8M
| $39K | ﹤0.01% |
673
+433
| +180% | +$28.5K |
|
6024
PUT
Mayville Engineering Co
MEC
$654M
| $39K | ﹤0.01% |
3,600
| – | – |
|
6025
McCormick & Company Non-Voting
MKC
$13.7B
| $39K | ﹤0.01% |
525
-18,989
| -97% | -$1.59M |
|
Similar funds
Simplex Trading's Q3 2023 Portfolio in Review
As of Q3 2023, Simplex Trading held 10,417 positions worth $127B, up 4.5% from $122B the previous quarter. Its ten largest holdings account for 44% of the portfolio.
Simplex Trading deployed $11.9B of net new capital in Q3 2023, opening 1,399 new positions and adding to 3,690 existing holdings. Its largest new stake was Amazon: 841,102 shares worth $107M.
By sector, the portfolio is most concentrated in Technology at 0.44% of assets, up from 0.41% a quarter earlier, followed by Consumer Discretionary and Healthcare.
On the sell side, the largest reduction was Netflix, an estimated $27.1M trimmed.
- Simplex Trading's largest Q3 2023 buy was Amazon: 841,102 shares worth $107M.
- Simplex Trading added most to SPDR Gold Trust in Q3 2023, an estimated $68.6M increase.
- Simplex Trading's biggest Q3 2023 reduction was Netflix, cutting an estimated $27.1M.
- Simplex Trading fully exited Qualcomm in Q3 2023, selling an estimated $24.6M.
- Simplex Trading's ten largest holdings make up 44% of its $127B portfolio in Q3 2023.
- Simplex Trading opened 1,399 new positions and closed 1,719 in Q3 2023.
- Simplex Trading's portfolio value rose 4.5% quarter-over-quarter to $127B.
Based on Simplex Trading's 13F filing for Q3 2023, filed 1 Nov 2023.