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 | |
|---|---|---|---|---|---|---|
7101
CALL
LiveRamp
RAMP
$2.29B
| $13.3K | ﹤0.01% |
500
+400
| +400% | +$10.5K |
|
7102
PUT
Cadiz
CDZI
$314M
| $13.3K | ﹤0.01% |
2,700
-28,600
| -91% | -$156K |
|
|
ETU
7103
T-Rex 2X Long Ether Daily Target ETF
ETU
$17.4M
| $13.2K | ﹤0.01% |
2,229
-739
| -25% | -$6.71K |
|
|
NAVN
7104
CALL
Navan Inc
NAVN
$5.52B
| $13.2K | ﹤0.01% |
1,000
+900
| +900% | +$10.7K |
|
7105
CALL
Black Diamond Therapeutics
BDTX
$108M
| $13.2K | ﹤0.01% |
+6,200
| New | +$14.7K |
|
7106
CALL
Sprinklr
CXM
$1.19B
| $13.2K | ﹤0.01% |
2,200
-61,500
| -97% | -$382K |
|
|
MNTN
7107
PUT
MNTN Inc
MNTN
$782M
| $13.2K | ﹤0.01% |
1,500
-2,600
| -63% | -$26K |
|
7108
PUT
NOV
NOV
$6.69B
| $13.2K | ﹤0.01% |
700
-30,200
| -98% | -$567K |
|
7109
CALL
QuidelOrtho
QDEL
$691M
| $13.1K | ﹤0.01% |
800
-11,400
| -93% | -$280K |
|
|
OGI
7110
PUT
Organigram Holdings
OGI
$144M
| $13.1K | ﹤0.01% |
9,800
+9,600
| +4,800% | +$14.3K |
|
7111
BARK
BARK
$75M
| $13.1K | ﹤0.01% |
1,295
+173
| +15% | +$2.66K |
|
7112
CALL
Rimini Street
RMNI
$398M
| $13.1K | ﹤0.01% |
4,000
-52,300
| -93% | -$181K |
|
7113
CALL
Victory Capital Holdings
VCTR
$6.8B
| $13.1K | ﹤0.01% |
200
-100
| -33% | -$6.97K |
|
|
YALA
7114
CALL
Yalla Group
YALA
$811M
| $13.1K | ﹤0.01% |
2,100
+700
| +50% | +$4.8K |
|
|
CAN
7115
Canaan Creative
CAN
$243M
| $13.1K | ﹤0.01% |
30,237
-87,165
| -74% | -$51K |
|
7116
CALL
IT Tech Packaging
ITP
$2.44M
| $13K | ﹤0.01% |
71,500
+23,000
| +47% | +$4.72K |
|
7117
PUT
Cars.com
CARS
$503M
| $13K | ﹤0.01% |
1,600
-44,600
| -97% | -$456K |
|
7118
First Trust RBA American Industrial Renaissance ETF
AIRR
$8.99B
| $13K | ﹤0.01% |
+117
| New | +$13.2K |
|
7119
CALL
Malibu Boats
MBUU
$440M
| $13K | ﹤0.01% |
+500
| New | +$14.9K |
|
|
STKL
7120
CALL
DELISTED
SunOpta
STKL
| $13K | ﹤0.01% |
+2,000
| New | +$11.3K |
|
7121
American Outdoor Brands
AOUT
$202M
| $13K | ﹤0.01% |
1,387
+613
| +79% | +$5.43K |
|
|
FBRX
7122
PUT
DELISTED
Forte Biosciences
FBRX
| $12.9K | ﹤0.01% |
500
-20,800
| -98% | -$599K |
|
7123
National Healthcare
NHC
$3.49B
| $12.9K | ﹤0.01% |
81
-267
| -77% | -$41K |
|
7124
Krystal Biotech
KRYS
$9.73B
| $12.9K | ﹤0.01% |
50
-243
| -83% | -$64.7K |
|
7125
PUT
ICU Medical
ICUI
$3.98B
| $12.9K | ﹤0.01% |
+100
| New | +$14.4K |
|
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.