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 | |
|---|---|---|---|---|---|---|
1776
PUT
McEwen Inc
MUX
$1.1B
| $2.1M | ﹤0.01% |
102,800
-67,500
| -40% | -$1.6M |
|
1777
PUT
Clear Secure
YOU
$4.24B
| $2.09M | ﹤0.01% |
43,200
| – | – |
|
1778
CALL
Rayonier Advanced Materials
RYAM
$542M
| $2.09M | ﹤0.01% |
188,800
-43,000
| -19% | -$388K |
|
|
SLNO
1779
CALL
DELISTED
Soleno Therapeutics
SLNO
| $2.09M | ﹤0.01% |
62,400
+52,600
| +537% | +$2.06M |
|
|
DENT
1780
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $2.09M | ﹤0.01% |
621,300
-884,500
| -59% | -$2.97M |
|
1781
PUT
Pagaya Technologies
PGY
$1.45B
| $2.09M | ﹤0.01% |
179,200
-22,700
| -11% | -$359K |
|
1782
Equinor
EQNR
$98B
| $2.09M | ﹤0.01% |
49,437
+44,800
| +966% | +$1.35M |
|
1783
PUT
PureCycle Technologies
PCT
$890M
| $2.08M | ﹤0.01% |
401,100
-363,800
| -48% | -$3.03M |
|
1784
PUT
United States Antimony
UAMY
$626M
| $2.07M | ﹤0.01% |
237,500
+73,900
| +45% | +$644K |
|
1785
CALL
Viasat
VSAT
$9.52B
| $2.07M | ﹤0.01% |
45,200
-41,100
| -48% | -$1.85M |
|
1786
CALL
Lattice Semiconductor
LSCC
$17.8B
| $2.07M | ﹤0.01% |
22,300
+17,200
| +337% | +$1.54M |
|
1787
CALL
Jefferies Financial Group
JEF
$10.7B
| $2.07M | ﹤0.01% |
50,100
+700
| +1% | +$36.3K |
|
1788
PUT
Emcor
EME
$33.6B
| $2.07M | ﹤0.01% |
2,800
-1,100
| -28% | -$801K |
|
1789
Coeur Mining
CDE
$18.3B
| $2.07M | ﹤0.01% |
110,079
+851
| +0.8% | +$18.5K |
|
1790
PUT
Cintas
CTAS
$79B
| $2.06M | ﹤0.01% |
12,200
-2,300
| -16% | -$441K |
|
1791
CALL
Flutter Entertainment
FLUT
$12.9B
| $2.06M | ﹤0.01% |
20,200
+11,300
| +127% | +$1.63M |
|
1792
PUT
American Water Works
AWK
$25.8B
| $2.05M | ﹤0.01% |
15,100
-5,700
| -27% | -$753K |
|
1793
PUT
UGI
UGI
$7.75B
| $2.05M | ﹤0.01% |
56,300
+7,900
| +16% | +$297K |
|
1794
CALL
Coca-Cola Europacific Partners
CCEP
$45B
| $2.05M | ﹤0.01% |
+22,600
| New | +$2.17M |
|
1795
PUT
C3.ai
AI
$1.66B
| $2.05M | ﹤0.01% |
243,200
-40,500
| -14% | -$434K |
|
1796
PUT
D.R. Horton
DHI
$39B
| $2.04M | ﹤0.01% |
14,900
-51,800
| -78% | -$7.83M |
|
1797
CALL
TriNet
TNET
$2.88B
| $2.04M | ﹤0.01% |
56,100
+52,300
| +1,376% | +$2.5M |
|
1798
CALL
iShares S&P GSCI Commodity-Indexed Trust
GSG
$1.02B
| $2.04M | ﹤0.01% |
63,200
+62,500
| +8,929% | +$1.67M |
|
1799
CALL
Elbit Systems
ESLT
$33B
| $2.04M | ﹤0.01% |
2,400
+1,600
| +200% | +$1.23M |
|
1800
CALL
Fabrinet
FN
$15.2B
| $2.03M | ﹤0.01% |
3,900
+3,800
| +3,800% | +$1.93M |
|
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.