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 | |
|---|---|---|---|---|---|---|---|
3851
PUT
Butterfly Network
BFLY
$2.27B
| $292K | ﹤0.01% |
72,200
+56,300
| +354% | +$217K |
2024 Q1
8 quarters
|
|
3852
CALL
Alphatec Holdings
ATEC
$1.53B
| $292K | ﹤0.01% |
26,800
-48,100
| -64% | -$700K |
2020 Q2
23 quarters
|
|
3853
PUT
Pangaea Logistics
PANL
$551M
| $291K | ﹤0.01% |
+41,100
| New | +$324K |
2026 Q1
0 quarters
|
|
3854
PUT
Pharvaris
PHVS
$2.18B
| $291K | ﹤0.01% |
10,300
+10,100
| +5,050% | +$270K |
2025 Q4
1 quarter
|
|
3855
PUT
Digital Turbine
APPS
$1.4B
| $291K | ﹤0.01% |
101,000
+4,000
| +4% | +$17.2K |
2021 Q2
19 quarters
|
|
3856
PUT
LKQ Corp
LKQ
$5.76B
| $291K | ﹤0.01% |
9,900
+3,500
| +55% | +$112K |
2018 Q1
32 quarters
|
|
|
UROY
3857
PUT
Uranium Royalty Corp
UROY
$1.48B
| $291K | ﹤0.01% |
79,600
+53,100
| +200% | +$217K |
2021 Q4
17 quarters
|
|
3858
PUT
UFP Technologies
UFPT
$2.28B
| $290K | ﹤0.01% |
1,500
-200
| -12% | -$46.3K |
2024 Q2
7 quarters
|
|
|
FJET
3859
CALL
Starfighters Space Inc
FJET
$97.3M
| $290K | ﹤0.01% |
49,000
+47,000
| +2,350% | +$377K |
2025 Q4
1 quarter
|
|
|
CGC
3860
PUT
Canopy Growth
CGC
$373M
| $290K | ﹤0.01% |
305,500
-635,400
| -68% | -$700K |
2018 Q2
31 quarters
|
|
3861
PUT
DigitalBridge
DBRG
| $290K | ﹤0.01% |
18,800
-69,300
| -79% | -$1.07M |
2021 Q2
19 quarters
|
|
|
NAK
3862
PUT
Northern Dynasty Minerals
NAK
$753M
| $290K | ﹤0.01% |
+207,000
| New | +$360K |
2026 Q1
0 quarters
|
|
3863
PUT
EPR Properties
EPR
$4.25B
| $290K | ﹤0.01% |
5,800
-4,600
| -44% | -$253K |
2017 Q2
35 quarters
|
|
3864
Skyward Specialty Insurance
SKWD
$2.43B
| $289K | ﹤0.01% |
6,626
+6,233
| +1,586% | +$283K |
2024 Q1
8 quarters
|
|
|
HNGE
3865
CALL
Hinge Health
HNGE
$7.9B
| $289K | ﹤0.01% |
7,500
-17,100
| -70% | -$711K |
2025 Q2
3 quarters
|
|
3866
Direxion Daily NVDA Bull 2X ETF
NVDU
$551M
| $289K | ﹤0.01% |
2,999
-1,717
| -36% | -$191K |
2025 Q4
1 quarter
|
|
3867
Box
BOX
$4.75B
| $289K | ﹤0.01% |
+12,217
| New | +$307K |
2026 Q1
0 quarters
|
|
3868
PUT
Nasdaq
NDAQ
$51.2B
| $289K | ﹤0.01% |
3,400
-800
| -19% | -$71.7K |
2021 Q2
19 quarters
|
|
3869
Antero Midstream
AM
$9.62B
| $288K | ﹤0.01% |
+12,653
| New | +$261K |
2026 Q1
0 quarters
|
|
3870
CALL
Thomson Reuters
TRI
$43B
| $288K | ﹤0.01% |
3,151
+2,954
| +1,499% | +$312K |
2017 Q4
33 quarters
|
|
3871
Genuine Parts
GPC
$17.2B
| $288K | ﹤0.01% |
+2,720
| New | +$337K |
2026 Q1
0 quarters
|
|
3872
CALL
Boyd Gaming
BYD
$4.8B
| $288K | ﹤0.01% |
3,500
-8,900
| -72% | -$747K |
2021 Q2
19 quarters
|
|
|
ABTC
3873
PUT
American Bitcoin Corp
ABTC
$596M
| $288K | ﹤0.01% |
20,747
-5,346
| -20% | -$103K |
2025 Q3
2 quarters
|
|
3874
Invesco DB Oil Fund
DBO
$295M
| $287K | ﹤0.01% |
+14,592
| New | +$226K |
2026 Q1
0 quarters
|
|
3875
PUT
Expeditors International
EXPD
$24.4B
| $286K | ﹤0.01% |
2,000
+1,000
| +100% | +$152K |
2021 Q2
19 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.