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 | |
|---|---|---|---|---|---|---|---|
4226
PUT
Manulife Financial
MFC
$70.5B
| $214K | ﹤0.01% |
6,200
-1,800
| -23% | -$64.8K |
2017 Q4
33 quarters
|
|
4227
PUT
Kodiak Sciences
KOD
$6.19B
| $213K | ﹤0.01% |
5,600
+1,500
| +37% | +$38.8K |
2025 Q3
2 quarters
|
|
4228
PUT
Flywire
FLYW
$2.14B
| $213K | ﹤0.01% |
18,300
+17,700
| +2,950% | +$223K |
2023 Q2
11 quarters
|
|
4229
CALL
Tandem Diabetes Care
TNDM
$1.15B
| $213K | ﹤0.01% |
11,100
-5,200
| -32% | -$113K |
2018 Q2
31 quarters
|
|
4230
Kingstone Companies
KINS
$263M
| $213K | ﹤0.01% |
14,591
+5,143
| +54% | +$80.9K |
2025 Q4
1 quarter
|
|
|
LX
4231
CALL
LexinFintech Holdings
LX
$116M
| $212K | ﹤0.01% |
97,300
-124,000
| -56% | -$348K |
2018 Q2
31 quarters
|
|
4232
CALL
GeneDx Holdings
WGS
$2.12B
| $212K | ﹤0.01% |
3,300
-13,400
| -80% | -$1.22M |
2023 Q1
12 quarters
|
|
4233
Blend Labs
BLND
$248M
| $211K | ﹤0.01% |
+124,386
| New | +$266K |
2026 Q1
0 quarters
|
|
4234
PUT
Birkenstock
BIRK
$5.44B
| $211K | ﹤0.01% |
5,900
-38,200
| -87% | -$1.49M |
2023 Q4
9 quarters
|
|
|
SMU
4235
PUT
Tradr 2X Long SMR Daily ETF
SMU
$148M
| $211K | ﹤0.01% |
1,450
+717
| +98% | +$94.4K |
2025 Q3
2 quarters
|
|
4236
PUT
Northern Oil and Gas
NOG
$2.51B
| $210K | ﹤0.01% |
7,200
-30,600
| -81% | -$792K |
2021 Q2
19 quarters
|
|
|
BRSL
4237
Brightstar Lottery PLC
BRSL
$1.81B
| $210K | ﹤0.01% |
16,497
+9,834
| +148% | +$135K |
2025 Q1
4 quarters
|
|
|
BSOL
4238
Bitwise Solana Staking ETF
BSOL
$962M
| $210K | ﹤0.01% |
19,020
-27,096
| -59% | -$367K |
2025 Q4
1 quarter
|
|
4239
SEALSQ Corp
LAES
$531M
| $210K | ﹤0.01% |
80,206
-29,111
| -27% | -$114K |
2025 Q3
2 quarters
|
|
|
HITI
4240
CALL
High Tide
HITI
$238M
| $210K | ﹤0.01% |
91,700
+27,900
| +44% | +$68.6K |
2023 Q3
10 quarters
|
|
4241
ODDITY Tech
ODD
$873M
| $210K | ﹤0.01% |
+15,674
| New | +$393K |
2026 Q1
0 quarters
|
|
4242
Old Republic International
ORI
$9.05B
| $209K | ﹤0.01% |
+5,247
| New | +$216K |
2026 Q1
0 quarters
|
|
|
AEVA
4243
PUT
Aeva Technologies
AEVA
$996M
| $209K | ﹤0.01% |
15,900
-56,400
| -78% | -$838K |
2020 Q4
21 quarters
|
|
4244
CALL
Petco
WOOF
$630M
| $209K | ﹤0.01% |
+75,200
| New | +$208K |
2026 Q1
0 quarters
|
|
4245
RB Global
RBA
$15.1B
| $209K | ﹤0.01% |
2,180
-635
| -23% | -$67.3K |
2025 Q2
3 quarters
|
|
4246
PUT
Arhaus
ARHS
$1.4B
| $209K | ﹤0.01% |
30,800
+27,700
| +894% | +$251K |
2022 Q4
13 quarters
|
|
4247
AdvisorShares Pure US Cannabis ETF
MSOS
$906M
| $209K | ﹤0.01% |
58,787
-537,318
| -90% | -$2.2M |
2020 Q4
21 quarters
|
|
4248
CALL
Yeti Holdings
YETI
$3.02B
| $209K | ﹤0.01% |
5,700
-57,100
| -91% | -$2.51M |
2021 Q1
20 quarters
|
|
|
VZLA
4249
PUT
Vizsla Silver
VZLA
$1.33B
| $209K | ﹤0.01% |
63,200
-361,500
| -85% | -$1.65M |
2025 Q3
2 quarters
|
|
4250
PUT
Eagle Materials
EXP
$5.31B
| $208K | ﹤0.01% |
1,100
+900
| +450% | +$192K |
2023 Q1
12 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.