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 | |
|---|---|---|---|---|---|---|---|
4176
CALL
Church & Dwight Co
CHD
$22.3B
| $224K | ﹤0.01% |
2,400
-8,100
| -77% | -$779K |
2017 Q1
36 quarters
|
|
4177
CALL
Sabre
SABR
$803M
| $224K | ﹤0.01% |
154,400
-135,000
| -47% | -$180K |
2016 Q4
37 quarters
|
|
4178
PUT
SBA Communications
SBAC
$16.8B
| $224K | ﹤0.01% |
1,300
+1,100
| +550% | +$206K |
2021 Q2
19 quarters
|
|
|
GRSD
4179
CALL
Grandstand Ltd
GRSD
$52.3M
| $223K | ﹤0.01% |
57,600
+5,000
| +10% | +$22.4K |
2025 Q2
3 quarters
|
|
4180
PUT
Teekay
TK
$1.28B
| $223K | ﹤0.01% |
18,300
-1,300
| -7% | -$14.3K |
2014 Q4
45 quarters
|
|
4181
Nordic American Tanker
NAT
$1.73B
| $223K | ﹤0.01% |
+38,116
| New | +$180K |
2026 Q1
0 quarters
|
|
4182
CALL
PVH
PVH
$3.5B
| $223K | ﹤0.01% |
3,200
-2,800
| -47% | -$184K |
2021 Q2
19 quarters
|
|
4183
Weyerhaeuser
WY
$13.4B
| $223K | ﹤0.01% |
+9,128
| New | +$230K |
2026 Q1
0 quarters
|
|
4184
PUT
Globe Life
GL
$12.7B
| $223K | ﹤0.01% |
1,600
-700
| -30% | -$98.8K |
2023 Q4
9 quarters
|
|
4185
CALL
Hyliion Holdings
HYLN
$752M
| $223K | ﹤0.01% |
126,500
+3,900
| +3% | +$7.85K |
2020 Q3
22 quarters
|
|
4186
Golar LNG
GLNG
$4.93B
| $222K | ﹤0.01% |
4,101
-18,854
| -82% | -$832K |
2020 Q2
23 quarters
|
|
4187
CALL
Vipshop
VIPS
$5.92B
| $222K | ﹤0.01% |
14,100
-68,900
| -83% | -$1.17M |
2014 Q4
45 quarters
|
|
|
SUPV
4188
CALL
Grupo Supervielle
SUPV
$597M
| $222K | ﹤0.01% |
23,500
+5,800
| +33% | +$59.5K |
2022 Q4
13 quarters
|
|
|
VLRS
4189
CALL
Controladora Vuela Compania de Aviacion
VLRS
$737M
| $222K | ﹤0.01% |
+30,600
| New | +$268K |
2026 Q1
0 quarters
|
|
|
HOS
4190
CALL
Hornbeck Offshore Services, Inc.
HOS
$2.55B
| $222K | ﹤0.01% |
+22,400
| New | +$191K |
2026 Q1
0 quarters
|
|
4191
CALL
LCI Industries
LCII
$2B
| $221K | ﹤0.01% |
+1,800
| New | +$246K |
2026 Q1
0 quarters
|
|
4192
PUT
Bitwise Bitcoin ETF
BITB
$3.13B
| $221K | ﹤0.01% |
6,000
-16,700
| -74% | -$693K |
2024 Q4
5 quarters
|
|
4193
Aon
AON
$58.5B
| $221K | ﹤0.01% |
+684
| New | +$227K |
2026 Q1
0 quarters
|
|
4194
HP
HPQ
$29B
| $221K | ﹤0.01% |
+11,488
| New | +$223K |
2026 Q1
0 quarters
|
|
|
BETA
4195
PUT
Beta Technologies Inc
BETA
$5.08B
| $221K | ﹤0.01% |
15,000
+7,900
| +111% | +$162K |
2025 Q4
1 quarter
|
|
4196
CALL
Amplitude
AMPL
$1.79B
| $220K | ﹤0.01% |
32,300
+21,600
| +202% | +$178K |
2021 Q4
17 quarters
|
|
4197
MACOM Technology Solutions
MTSI
$23B
| $220K | ﹤0.01% |
+990
| New | +$221K |
2026 Q1
0 quarters
|
|
4198
CALL
St. Joe Company
JOE
$3.71B
| $220K | ﹤0.01% |
3,500
+2,400
| +218% | +$161K |
2019 Q2
27 quarters
|
|
4199
CALL
Arbe Robotics
ARBE
$75.9M
| $220K | ﹤0.01% |
360,000
-218,900
| -38% | -$228K |
2024 Q1
8 quarters
|
|
4200
CALL
Trevi Therapeutics
TRVI
$2.02B
| $220K | ﹤0.01% |
18,400
+17,700
| +2,529% | +$198K |
2024 Q4
5 quarters
|
|
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.