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 | Technology | 0.62% |
| 2 | Communication Services | 0.22% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Healthcare | 0.2% |
| 5 | Industrials | 0.1% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
1801
PUT
Allstate
ALL
$66.9B
| $2.03M | ﹤0.01% |
9,800
+400
| +4% | +$82K |
|
|
PPLT
1802
PUT
abrdn Physical Platinum Shares ETF
PPLT
$1.81B
| $2.03M | ﹤0.01% |
114,000
-299,000
| -72% | -$5.98M |
|
1803
PUT
Distribution Solutions Group
DSGR
$1.6B
| $2.03M | ﹤0.01% |
+77,200
| New | +$2.16M |
|
1804
PUT
GitLab
GTLB
$5.28B
| $2.03M | ﹤0.01% |
93,600
-131,600
| -58% | -$3.84M |
|
1805
PUT
Hallador Energy
HNRG
$718M
| $2.03M | ﹤0.01% |
124,400
+122,000
| +5,083% | +$2.27M |
|
1806
Goodyear
GT
$2.07B
| $2.02M | ﹤0.01% |
305,344
-136,077
| -31% | -$1.15M |
|
1807
Vistra
VST
$55.1B
| $2.02M | ﹤0.01% |
13,455
-29,137
| -68% | -$4.72M |
|
1808
PUT
Roivant Sciences
ROIV
$25.2B
| $2.02M | ﹤0.01% |
73,000
-123,300
| -63% | -$3.17M |
|
1809
PUT
GDS Holdings
GDS
$6.34B
| $2.02M | ﹤0.01% |
50,100
-7,900
| -14% | -$339K |
|
|
ETH
1810
CALL
Grayscale Ethereum Staking Mini ETF Shares
ETH
$1.7B
| $2.02M | ﹤0.01% |
+101,600
| New | +$2.3M |
|
1811
CALL
Brookfield Renewable
BEP
$10B
| $2.01M | ﹤0.01% |
+61,500
| New | +$1.85M |
|
1812
FMC
FMC
$1.42B
| $2.01M | ﹤0.01% |
116,481
+39,809
| +52% | +$595K |
|
1813
CALL
Ally Financial
ALLY
$13.1B
| $2M | ﹤0.01% |
51,100
-17,100
| -25% | -$704K |
|
|
TSSI
1814
CALL
TSS Inc
TSSI
$272M
| $2M | ﹤0.01% |
154,000
+21,000
| +16% | +$211K |
|
1815
PUT
Teck Resources
TECK
$29.5B
| $2M | ﹤0.01% |
38,700
-23,400
| -38% | -$1.25M |
|
1816
Royal Bank of Canada
RY
$291B
| $2M | ﹤0.01% |
12,369
-6,702
| -35% | -$1.12M |
|
1817
PUT
WIX.com
WIX
$2.15B
| $2M | ﹤0.01% |
22,200
+9,300
| +72% | +$778K |
|
1818
CALL
SM Energy
SM
$7.96B
| $2M | ﹤0.01% |
64,100
+14,500
| +29% | +$331K |
|
1819
CALL
Iovance Biotherapeutics
IOVA
$2.23B
| $2M | ﹤0.01% |
569,400
+231,400
| +68% | +$740K |
|
1820
PUT
Royalty Pharma
RPRX
$26.1B
| $2M | ﹤0.01% |
41,600
+26,600
| +177% | +$1.16M |
|
1821
PUT
2x Long VIX Futures ETF
UVIX
$275M
| $1.99M | ﹤0.01% |
9,710
-14,375
| -60% | -$1.93M |
|
1822
CALL
BlackBerry
BB
$5.01B
| $1.99M | ﹤0.01% |
615,000
-672,600
| -52% | -$2.38M |
|
1823
CALL
Arbor Realty Trust
ABR
$960M
| $1.99M | ﹤0.01% |
258,200
-228,400
| -47% | -$1.78M |
|
1824
VanEck Gold Miners ETF
GDX
$23B
| $1.98M | ﹤0.01% |
21,591
-226,024
| -91% | -$22.3M |
|
1825
PUT
Forrester Research
FORR
$172M
| $1.98M | ﹤0.01% |
+350,000
| New | +$2.39M |
|
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 withdrew a net $18.1B in Q1 2026, closing 1,574 positions and reducing 3,926 holdings. Its most notable exit was Direxion Daily Semiconductor Bull 3X ETF, an estimated $52M position sold in full.
By sector, the portfolio is most concentrated in Technology at 0.62% of assets, up from 0.59% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amazon worth $159M.
- 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 2,156 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.