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 | |
|---|---|---|---|---|---|---|---|
6426
PUT
Cirrus Logic
CRUS
$6.02B
| $28.9K | ﹤0.01% |
+200
| New | +$26.9K |
2026 Q1
0 quarters
|
|
6427
PUT
Idaho Strategic Resources
IDR
$447M
| $28.9K | ﹤0.01% |
900
-800
| -47% | -$31.1K |
2025 Q1
4 quarters
|
|
6428
CALL
NRC Health Common Stock
NRC
$472M
| $28.9K | ﹤0.01% |
1,700
+800
| +89% | +$13.6K |
2025 Q1
4 quarters
|
|
|
PLG
6429
PUT
Platinum Group Metals
PLG
$162M
| $28.9K | ﹤0.01% |
16,300
-1,000
| -6% | -$2.42K |
2025 Q3
2 quarters
|
|
6430
PUT
Flotek Industries
FTK
$1.08B
| $28.8K | ﹤0.01% |
+1,700
| New | +$29.2K |
2026 Q1
0 quarters
|
|
6431
Compañía de Cervecerías Unidas
CCU
$1.91B
| $28.8K | ﹤0.01% |
2,540
-2,791
| -52% | -$37.2K |
2025 Q2
3 quarters
|
|
6432
Vanguard Short-Term Treasury ETF
VGSH
$34.4B
| $28.8K | ﹤0.01% |
492
+466
| +1,792% | +$27.4K |
2025 Q4
1 quarter
|
|
6433
GraniteShares ETF Trust GraniteShares 2x Long BABA Daily ETF
BABX
$110M
| $28.8K | ﹤0.01% |
1,166
-1,241
| -52% | -$45.9K |
2025 Q4
1 quarter
|
|
6434
CALL
OGE Energy
OGE
$9.43B
| $28.8K | ﹤0.01% |
600
-600
| -50% | -$27.4K |
2018 Q2
31 quarters
|
|
6435
Invesco S&P SmallCap Health Care ETF
PSCH
$177M
| $28.8K | ﹤0.01% |
+699
| New | +$30K |
2026 Q1
0 quarters
|
|
6436
PUT
Hyatt Hotels
H
$15.2B
| $28.8K | ﹤0.01% |
200
-200
| -50% | -$31.7K |
2019 Q1
28 quarters
|
|
6437
CALL
ACI Worldwide
ACIW
$5.02B
| $28.7K | ﹤0.01% |
+700
| New | +$29.4K |
2026 Q1
0 quarters
|
|
6438
CALL
Clean Harbors
CLH
$16.5B
| $28.7K | ﹤0.01% |
+100
| New | +$27.3K |
2026 Q1
0 quarters
|
|
|
CNH
6439
PUT
CNH Industrial
CNH
$20.7B
| $28.6K | ﹤0.01% |
2,600
-2,600
| -50% | -$29.2K |
2019 Q3
26 quarters
|
|
6440
ReposiTrak
TRAK
$152M
| $28.5K | ﹤0.01% |
3,756
+3,618
| +2,622% | +$34.8K |
2025 Q4
1 quarter
|
|
6441
CALL
Gencor Industries
GENC
$254M
| $28.5K | ﹤0.01% |
1,900
| – | – |
2025 Q3
2 quarters
|
|
|
ONT
6442
CALL
Onterris Inc
ONT
$447M
| $28.5K | ﹤0.01% |
+1,300
| New | +$31.2K |
2026 Q1
0 quarters
|
|
|
CRWG
6443
Leverage Shares 2X Long CRWV Daily ETF
CRWG
$120M
| $28.4K | ﹤0.01% |
+1,200
| New | +$42.5K |
2026 Q1
0 quarters
|
|
6444
PUT
HUTCHMED
HCM
$2.53B
| $28.4K | ﹤0.01% |
1,900
| – | – |
2024 Q4
5 quarters
|
|
6445
PUT
Magnolia Oil & Gas
MGY
$6.48B
| $28.4K | ﹤0.01% |
900
+600
| +200% | +$16.1K |
2020 Q4
21 quarters
|
|
6446
PUT
Box
BOX
$4.75B
| $28.4K | ﹤0.01% |
1,200
-12,500
| -91% | -$315K |
2016 Q1
40 quarters
|
|
6447
CALL
Edgewise Therapeutics
EWTX
$4.4B
| $28.4K | ﹤0.01% |
900
-3,800
| -81% | -$110K |
2023 Q4
9 quarters
|
|
6448
CALL
SAB Biotherapeutics
SABS
$278M
| $28.3K | ﹤0.01% |
+7,400
| New | +$29.5K |
2026 Q1
0 quarters
|
|
6449
Fidelity MSCI Materials Index ETF
FMAT
$567M
| $28.2K | ﹤0.01% |
+490
| New | +$28.7K |
2026 Q1
0 quarters
|
|
|
HTT
6450
High Templar Tech Ltd
HTT
$368M
| $28.2K | ﹤0.01% |
14,547
-114,544
| -89% | -$323K |
2024 Q2
7 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.