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 | |
|---|---|---|---|---|---|---|---|
6301
PUT
Exponent
EXPO
$3.32B
| $32.6K | ﹤0.01% |
500
| – | – |
2025 Q1
4 quarters
|
|
|
AUTL
6302
Autolus Therapeutics
AUTL
$492M
| $32.6K | ﹤0.01% |
23,641
-34,278
| -59% | -$52.1K |
2025 Q2
3 quarters
|
|
|
LFGY
6303
YieldMax Crypto Industry & Tech Portfolio Option Income ETF
LFGY
$101M
| $32.6K | ﹤0.01% |
1,615
-4,295
| -73% | -$98.7K |
2025 Q3
2 quarters
|
|
6304
CALL
Mistras Group
MG
$657M
| $32.5K | ﹤0.01% |
2,200
-35,800
| -94% | -$517K |
2025 Q1
4 quarters
|
|
6305
Priority Technology Holdings
PRTH
$642M
| $32.5K | ﹤0.01% |
+6,876
| New | +$37.7K |
2026 Q1
0 quarters
|
|
6306
ProShares Ultra Energy
DIG
$84.2M
| $32.4K | ﹤0.01% |
486
-957
| -66% | -$49.4K |
2025 Q4
1 quarter
|
|
6307
YieldMax AMD Option Income Strategy ETF
AMDY
$452M
| $32.4K | ﹤0.01% |
1,037
-1,760
| -63% | -$59.7K |
2025 Q2
3 quarters
|
|
6308
CALL
Pulse Biosciences
PLSE
$3.55B
| $32.4K | ﹤0.01% |
1,500
-600
| -29% | -$11.1K |
2018 Q2
31 quarters
|
|
|
APPX
6309
Tradr 2X Long APP Daily ETF
APPX
$49.6M
| $32.3K | ﹤0.01% |
+1,179
| New | +$58.3K |
2026 Q1
0 quarters
|
|
6310
PUT
Cheniere Energy
CQP
$29.5B
| $32.3K | ﹤0.01% |
500
-5,500
| -92% | -$329K |
2017 Q4
33 quarters
|
|
6311
CALL
Vertical Aerospace
EVTL
$103M
| $32.3K | ﹤0.01% |
14,600
-18,700
| -56% | -$85.1K |
2025 Q3
2 quarters
|
|
6312
PUT
Madison Square Garden
MSGS
$9.61B
| $32.1K | ﹤0.01% |
+100
| New | +$29.8K |
2026 Q1
0 quarters
|
|
6313
PUT
Dream Finders Homes
DFH
$986M
| $32K | ﹤0.01% |
2,300
+700
| +44% | +$12.4K |
2022 Q3
14 quarters
|
|
6314
PUT
Alto Ingredients
ALTO
$285M
| $31.9K | ﹤0.01% |
6,600
-61,500
| -90% | -$195K |
2025 Q1
4 quarters
|
|
6315
CALL
National Healthcare
NHC
$3.5B
| $31.9K | ﹤0.01% |
+200
| New | +$30.7K |
2026 Q1
0 quarters
|
|
|
6316
PUT
National Healthcare
NHC
$3.5B
| $31.9K | ﹤0.01% |
+200
| New | +$30.7K |
2026 Q1
0 quarters
|
|
6317
CALL
Coya Therapeutics
COYA
$111M
| $31.9K | ﹤0.01% |
8,100
+8,000
| +8,000% | +$37.4K |
2025 Q4
1 quarter
|
|
6318
PUT
Lifestance Health
LFST
$4.53B
| $31.9K | ﹤0.01% |
5,000
-500
| -9% | -$3.48K |
2021 Q4
17 quarters
|
|
6319
iShares MSCI USA Value Factor ETF
VLUE
$9.58B
| $31.9K | ﹤0.01% |
224
+124
| +124% | +$18.2K |
2025 Q4
1 quarter
|
|
6320
PUT
Arcosa
ACA
$7.19B
| $31.8K | ﹤0.01% |
300
-200
| -40% | -$22.7K |
2024 Q1
8 quarters
|
|
6321
PUT
Cambria Tail Risk ETF
TAIL
$148M
| $31.8K | ﹤0.01% |
3,000
+500
| +20% | +$5.79K |
2025 Q1
4 quarters
|
|
6322
CALL
California Water Service
CWT
$2.79B
| $31.7K | ﹤0.01% |
700
-3,500
| -83% | -$157K |
2025 Q2
3 quarters
|
|
|
INV
6323
PUT
Innventure Inc
INV
$41M
| $31.7K | ﹤0.01% |
8,100
-5,400
| -40% | -$19.1K |
2025 Q4
1 quarter
|
|
6324
CALL
Portland General Electric
POR
$5.26B
| $31.7K | ﹤0.01% |
600
-1,800
| -75% | -$92.5K |
2019 Q1
28 quarters
|
|
6325
CALL
Caledonia Mining Corp
CMCL
$460M
| $31.6K | ﹤0.01% |
1,400
+1,200
| +600% | +$33.5K |
2023 Q2
11 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.