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 | |
|---|---|---|---|---|---|---|---|
3876
Xcel Energy
XEL
$44.1B
| $286K | ﹤0.01% |
3,595
-6,216
| -63% | -$488K |
2025 Q3
2 quarters
|
|
|
VZLA
3877
Vizsla Silver
VZLA
$1.33B
| $285K | ﹤0.01% |
86,509
-2,582
| -3% | -$11.8K |
2025 Q3
2 quarters
|
|
3878
CALL
Columbia Banking Systems
COLB
$8.13B
| $285K | ﹤0.01% |
10,400
-1,200
| -10% | -$34.7K |
2024 Q2
7 quarters
|
|
3879
CALL
W.R. Berkley
WRB
$25.6B
| $285K | ﹤0.01% |
4,300
-24,800
| -85% | -$1.71M |
2019 Q2
27 quarters
|
|
3880
CALL
Cannae Holdings
CNNE
$671M
| $284K | ﹤0.01% |
+25,000
| New | +$336K |
2026 Q1
0 quarters
|
|
3881
StealthGas
GASS
$344M
| $284K | ﹤0.01% |
30,949
+29,111
| +1,584% | +$246K |
2025 Q4
1 quarter
|
|
3882
SiTime
SITM
$20.4B
| $284K | ﹤0.01% |
821
-279
| -25% | -$103K |
2025 Q2
3 quarters
|
|
3883
CALL
Immunocore
IMCR
$1.57B
| $283K | ﹤0.01% |
9,400
| – | – |
2022 Q1
16 quarters
|
|
3884
CALL
B&G Foods
BGS
$238M
| $283K | ﹤0.01% |
58,900
+8,500
| +17% | +$41.2K |
2015 Q2
43 quarters
|
|
3885
CALL
Gold Royalty Corp
GROY
$693M
| $283K | ﹤0.01% |
79,100
-13,000
| -14% | -$55.5K |
2021 Q4
17 quarters
|
|
3886
CALL
ADT
ADT
$4.55B
| $283K | ﹤0.01% |
43,100
-13,700
| -24% | -$103K |
2018 Q2
31 quarters
|
|
3887
PUT
Global X S&P 500 Tail Risk ETF
XTR
$4.9M
| $283K | ﹤0.01% |
5,500
-5,800
| -51% | -$153K |
2022 Q3
14 quarters
|
|
3888
CALL
FirstCash
FCFS
$9.03B
| $282K | ﹤0.01% |
1,500
+100
| +7% | +$18.1K |
2025 Q3
2 quarters
|
|
3889
PUT
Honda
HMC
$41B
| $282K | ﹤0.01% |
11,600
+1,700
| +17% | +$49.3K |
2018 Q2
31 quarters
|
|
|
FOLD
3890
PUT
DELISTED
Amicus Therapeutics
FOLD
| $282K | ﹤0.01% |
19,500
-1,800
| -8% | -$25.8K |
2024 Q4
5 quarters
|
|
|
TECX
3891
PUT
Tectonic Therapeutic
TECX
$443M
| $281K | ﹤0.01% |
9,100
+2,600
| +40% | +$64K |
2025 Q2
3 quarters
|
|
3892
CALL
BrightSpring Health Services
BTSG
$11.3B
| $281K | ﹤0.01% |
+6,600
| New | +$266K |
2026 Q1
0 quarters
|
|
3893
CALL
DNOW Inc
DNOW
$2.76B
| $281K | ﹤0.01% |
23,600
+19,400
| +462% | +$263K |
2024 Q4
5 quarters
|
|
3894
CALL
OptimizeRx
OPRX
$158M
| $281K | ﹤0.01% |
+44,700
| New | +$415K |
2026 Q1
0 quarters
|
|
3895
Direxion Daily S&P Biotech Bear 3X ETF
LABD
$143M
| $281K | ﹤0.01% |
17,221
+14,945
| +657% | +$283K |
2025 Q4
1 quarter
|
|
3896
CALL
Annovis Bio
ANVS
$49.9M
| $281K | ﹤0.01% |
125,800
+1,800
| +1% | +$4.94K |
2023 Q4
9 quarters
|
|
3897
Heritage Insurance Holdings
HRTG
$1.01B
| $280K | ﹤0.01% |
+10,676
| New | +$282K |
2026 Q1
0 quarters
|
|
|
BDN
3898
Brandywine Realty Trust
BDN
$479M
| $280K | ﹤0.01% |
103,379
+18,031
| +21% | +$53.9K |
2024 Q1
8 quarters
|
|
3899
CALL
Spectrum Brands
SPB
$1.83B
| $280K | ﹤0.01% |
+3,800
| New | +$271K |
2026 Q1
0 quarters
|
|
3900
PUT
Jacobs Solutions
J
$16.4B
| $280K | ﹤0.01% |
2,200
+600
| +38% | +$81.6K |
2016 Q4
37 quarters
|
|
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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.