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 | |
|---|---|---|---|---|---|---|---|
5876
ProShares Ultra Yen
YCL
$31M
| $50.3K | ﹤0.01% |
2,738
+421
| +18% | +$7.96K |
2025 Q1
4 quarters
|
|
5877
CALL
Timken Company
TKR
$8.47B
| $50.3K | ﹤0.01% |
500
-300
| -38% | -$29.8K |
2016 Q1
40 quarters
|
|
5878
PUT
Erie Indemnity
ERIE
$11.5B
| $50.3K | ﹤0.01% |
+200
| New | +$53.7K |
2026 Q1
0 quarters
|
|
5879
Aaon
AAON
$6.97B
| $50.2K | ﹤0.01% |
+607
| New | +$55.2K |
2026 Q1
0 quarters
|
|
5880
CALL
LifeMD
LFMD
$133M
| $50.2K | ﹤0.01% |
13,900
-15,700
| -53% | -$54.3K |
2021 Q1
20 quarters
|
|
5881
PUT
HealthEquity
HQY
$7.44B
| $50.1K | ﹤0.01% |
600
-1,600
| -73% | -$131K |
2017 Q4
33 quarters
|
|
5882
PUT
Crown Holdings
CCK
$11.6B
| $50.1K | ﹤0.01% |
500
-1,600
| -76% | -$171K |
2017 Q3
34 quarters
|
|
5883
Direxion Daily Homebuilders & Supplies Bull 3X ETF
NAIL
$516M
| $50.1K | ﹤0.01% |
+1,320
| New | +$76.4K |
2026 Q1
0 quarters
|
|
5884
Duos Technologies
DUOT
$286M
| $50.1K | ﹤0.01% |
+7,297
| New | +$64.9K |
2026 Q1
0 quarters
|
|
5885
CALL
Equity Lifestyle Properties
ELS
$11.3B
| $49.9K | ﹤0.01% |
800
-200
| -20% | -$13K |
2025 Q1
4 quarters
|
|
|
5886
PUT
Equity Lifestyle Properties
ELS
$11.3B
| $49.9K | ﹤0.01% |
800
-1,300
| -62% | -$84.2K |
2025 Q2
3 quarters
|
|
5887
PUT
Lincoln Electric
LECO
$15B
| $49.8K | ﹤0.01% |
200
+100
| +100% | +$26.7K |
2025 Q4
1 quarter
|
|
|
BMNU
5888
T-REX 2X Long BMNR Daily Target ETF
BMNU
$431M
| $49.7K | ﹤0.01% |
2,816
+938
| +50% | +$30.1K |
2025 Q3
2 quarters
|
|
5889
PUT
Arcus Biosciences
RCUS
$3.13B
| $49.7K | ﹤0.01% |
2,300
-400
| -15% | -$8.64K |
2022 Q1
16 quarters
|
|
5890
FerroAtlántica
GSM
$794M
| $49.7K | ﹤0.01% |
12,053
-91,794
| -88% | -$442K |
2025 Q3
2 quarters
|
|
5891
Arhaus
ARHS
$1.45B
| $49.7K | ﹤0.01% |
+7,324
| New | +$66.5K |
2026 Q1
0 quarters
|
|
|
WTMY
5892
PUT
WisdomTree High Income Laddered Municipal Fund
WTMY
$4.82M
| $49.6K | ﹤0.01% |
1,400
-200
| -13% | -$5.12K |
2025 Q2
3 quarters
|
|
5893
Schwab US Large-Cap Growth ETF
SCHG
$64.5B
| $49.5K | ﹤0.01% |
+1,701
| New | +$52.9K |
2026 Q1
0 quarters
|
|
5894
Sinclair Inc
SBGI
$900M
| $49.4K | ﹤0.01% |
3,818
-45,461
| -92% | -$660K |
2025 Q2
3 quarters
|
|
5895
PUT
Murphy USA
MUSA
$9.42B
| $49.4K | ﹤0.01% |
100
-100
| -50% | -$42.8K |
2025 Q3
2 quarters
|
|
5896
CALL
Roundhill Metaverse ETF
METV
$226M
| $49.3K | ﹤0.01% |
1,200
| – | – |
2022 Q4
13 quarters
|
|
5897
PUT
Procure Space ETF
UFO
$544M
| $49.3K | ﹤0.01% |
1,100
-4,700
| -81% | -$211K |
2025 Q3
2 quarters
|
|
5898
Protalix BioTherapeutics
PLX
$218M
| $49.2K | ﹤0.01% |
+22,671
| New | +$56.3K |
2026 Q1
0 quarters
|
|
5899
CALL
SelectQuote
SLQT
$74.4M
| $49.2K | ﹤0.01% |
78,100
+72,700
| +1,346% | +$76.3K |
2020 Q3
22 quarters
|
|
5900
CALL
Patria Investments
PAX
$1.63B
| $49.1K | ﹤0.01% |
3,900
-3,000
| -43% | -$42.2K |
2021 Q1
20 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.