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
|
+$168M |
| 2 |
NVIDIA
NVDA
|
+$141M |
| 3 |
TSMC
TSM
|
+$121M |
| 4 |
Meta Platforms (Facebook)
META
|
+$107M |
| 5 |
SPDR Gold Trust
GLD
|
+$103M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Apple
AAPL
|
+$174M |
| 2 |
Western Digital
WDC
|
+$87.7M |
| 3 |
Broadcom
AVGO
|
+$62.2M |
| 4 |
Direxion Daily Semiconductor Bull 3X ETF
SOXL
|
+$52M |
| 5 |
Netflix
NFLX
|
+$44.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | Held Since | |
|---|---|---|---|---|---|---|---|
|
TRON
4001
PUT
Tron Inc
TRON
$655M
| $256K | ﹤0.01% |
112,800
+12,200
| +12% | +$19.2K |
2025 Q2
3 quarters
|
|
4002
PUT
ArcBest
ARCB
$2.9B
| $256K | ﹤0.01% |
2,600
-2,000
| -43% | -$190K |
2019 Q4
25 quarters
|
|
|
OLPX
4003
DELISTED
Olaplex Holdings
OLPX
| $256K | ﹤0.01% |
125,973
+103,534
| +461% | +$159K |
2025 Q4
1 quarter
|
|
4004
Entegris
ENTG
$24.2B
| $255K | ﹤0.01% |
2,177
-10,875
| -83% | -$1.29M |
2025 Q1
4 quarters
|
|
4005
PUT
Icon
ICLR
$12.5B
| $255K | ﹤0.01% |
2,300
-3,700
| -62% | -$505K |
2025 Q3
2 quarters
|
|
4006
inTEST
INTT
$154M
| $254K | ﹤0.01% |
+18,639
| New | +$204K |
2026 Q1
0 quarters
|
|
4007
CALL
Trimble
TRMB
$13.4B
| $254K | ﹤0.01% |
3,900
+3,300
| +550% | +$229K |
2016 Q4
37 quarters
|
|
4008
PUT
Capital Southwest
CSWC
$1.48B
| $254K | ﹤0.01% |
11,500
+5,900
| +105% | +$134K |
2020 Q3
22 quarters
|
|
4009
PUT
JB Hunt Transport Services
JBHT
$21.3B
| $254K | ﹤0.01% |
1,200
-7,200
| -86% | -$1.53M |
2017 Q4
33 quarters
|
|
4010
PUT
Microbot Medical
MBOT
$80.6M
| $254K | ﹤0.01% |
105,500
+3,500
| +3% | +$7.82K |
2025 Q2
3 quarters
|
|
4011
CALL
Healthcare Realty
HR
$5.97B
| $253K | ﹤0.01% |
14,900
-27,600
| -65% | -$484K |
2018 Q2
31 quarters
|
|
|
AISP
4012
CALL
Airship AI Holdings
AISP
$76.5M
| $253K | ﹤0.01% |
112,000
-75,700
| -40% | -$215K |
2024 Q2
7 quarters
|
|
4013
PUT
Anavex Life Sciences
AVXL
$175M
| $253K | ﹤0.01% |
82,400
-7,500
| -8% | -$32.5K |
2021 Q2
19 quarters
|
|
4014
CALL
Planet Fitness
PLNT
$3.16B
| $253K | ﹤0.01% |
3,400
-7,400
| -69% | -$651K |
2015 Q4
41 quarters
|
|
|
ODVWW
4015
CALL
DELISTED
Osisko Development Corp. Warrant
ODVWW
| $253K | ﹤0.01% |
77,800
+47,100
| +153% | +$153K |
2024 Q4
5 quarters
|
|
|
IVES
4016
CALL
Dan IVES Wedbush AI Revolution ETF
IVES
$1.11B
| $252K | ﹤0.01% |
8,900
+3,400
| +62% | +$105K |
2025 Q3
2 quarters
|
|
4017
Direxion Daily GOOGL Bull 2X ETF
GGLL
$978M
| $252K | ﹤0.01% |
3,232
-11,196
| -78% | -$1.08M |
2025 Q3
2 quarters
|
|
4018
CALL
Allegro MicroSystems
ALGM
$6.78B
| $252K | ﹤0.01% |
8,000
-5,200
| -39% | -$179K |
2021 Q1
20 quarters
|
|
|
JMIA
4019
Jumia Technologies
JMIA
$929M
| $252K | ﹤0.01% |
36,542
-221,876
| -86% | -$2.24M |
2020 Q2
23 quarters
|
|
4020
PUT
Halozyme
HALO
$12.1B
| $252K | ﹤0.01% |
3,900
+2,100
| +117% | +$148K |
2021 Q2
19 quarters
|
|
4021
Neumora Therapeutics
NMRA
$103M
| $252K | ﹤0.01% |
+129,156
| New | +$335K |
2026 Q1
0 quarters
|
|
|
GRRR
4022
Gorilla Technology Group
GRRR
$374M
| $252K | ﹤0.01% |
+23,916
| New | +$292K |
2026 Q1
0 quarters
|
|
4023
Cooper Companies
COO
$10.9B
| $252K | ﹤0.01% |
3,522
-30
| -0.8% | -$2.37K |
2025 Q2
3 quarters
|
|
4024
Invesco CurrencyShares Australian Dollar Trust
FXA
$92.6M
| $251K | ﹤0.01% |
+3,677
| New | +$253K |
2026 Q1
0 quarters
|
|
4025
Vanguard FTSE Developed Markets ETF
VEA
$229B
| $251K | ﹤0.01% |
3,920
+3,290
| +522% | +$217K |
2025 Q4
1 quarter
|
|
Similar funds
Simplex Trading's Q1 2026 Portfolio in Review
As of Q1 2026, Simplex Trading held 10,500 positions worth $149B, down 16% from $177B the previous quarter. Its ten largest holdings account for 51% of the portfolio.
Simplex Trading's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q1 2026 buy was Amazon: 764,884 shares worth $159M.
- Simplex Trading added most to NVIDIA in Q1 2026, an estimated $141M increase.
- Simplex Trading's biggest Q1 2026 reduction was Apple, cutting an estimated $174M.
- Simplex Trading fully exited Direxion Daily Semiconductor Bull 3X ETF in Q1 2026, selling an estimated $52M.
- Simplex Trading's ten largest holdings make up 51% of its $149B portfolio in Q1 2026.
- Simplex Trading opened 2,157 new positions and closed 1,574 in Q1 2026.
- Simplex Trading's portfolio value fell 16% quarter-over-quarter to $149B.
Based on Simplex Trading's 13F filing for Q1 2026, filed 14 May 2026.