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 | |
|---|---|---|---|---|---|---|
2351
State Street SPDR S&P Retail ETF
XRT
$458M
| $1.15M | ﹤0.01% |
+14,303
| New | +$1.23M |
|
2352
Alexandria Real Estate Equities
ARE
$9.41B
| $1.15M | ﹤0.01% |
+24,790
| New | +$1.31M |
|
2353
CALL
FuelCell Energy
FCEL
$1.57B
| $1.15M | ﹤0.01% |
176,200
-558,500
| -76% | -$4.31M |
|
2354
PUT
Ouster
OUST
$2.28B
| $1.15M | ﹤0.01% |
62,600
+19,800
| +46% | +$431K |
|
|
JPGE
2355
PUT
DELISTED
JPMorgan Diversified Return Global Equity ETF
JPGE
| $1.15M | ﹤0.01% |
+20,300
| New | +$1.15M |
|
|
ARCX
2356
PUT
Tradr 2X Long ACHR Daily ETF
ARCX
$6.93M
| $1.15M | ﹤0.01% |
+35,400
| New | +$1.1M |
|
2357
CALL
Oceaneering
OII
$4.78B
| $1.15M | ﹤0.01% |
32,400
+32,200
| +16,100% | +$1.04M |
|
|
TGR
2358
PUT
DELISTED
ISHARES TARGET DATE RETIREMENT INCOME ETF
TGR
| $1.15M | ﹤0.01% |
32,000
+28,400
| +789% | +$1.02M |
|
2359
CALL
Boston Properties
BXP
$11.2B
| $1.15M | ﹤0.01% |
22,100
-20,800
| -48% | -$1.25M |
|
2360
Teucrium Sugar Fund
CANE
$74.2M
| $1.15M | ﹤0.01% |
109,848
+94,922
| +636% | +$912K |
|
2361
CALL
Everest Group
EG
$15.8B
| $1.14M | ﹤0.01% |
3,500
+3,400
| +3,400% | +$1.12M |
|
|
2362
PUT
Everest Group
EG
$15.8B
| $1.14M | ﹤0.01% |
3,500
+2,000
| +133% | +$658K |
|
2363
Fastly Inc
FSLY
$3.26B
| $1.14M | ﹤0.01% |
+39,355
| New | +$646K |
|
|
MULL
2364
GraniteShares 2x Long MU Daily ETF
MULL
$505M
| $1.14M | ﹤0.01% |
+268,675
| New | +$1.68M |
|
|
Q
2365
PUT
Qnity Electronics Inc
Q
$26.8B
| $1.14M | ﹤0.01% |
9,900
+3,100
| +46% | +$329K |
|
2366
CALL
Starwood Property Trust
STWD
$6.18B
| $1.14M | ﹤0.01% |
66,300
-124,000
| -65% | -$2.23M |
|
2367
CALL
Freshworks
FRSH
$3.09B
| $1.14M | ﹤0.01% |
142,100
-42,300
| -23% | -$390K |
|
2368
PUT
Sterling Infrastructure
STRL
$16.5B
| $1.14M | ﹤0.01% |
2,800
+1,000
| +56% | +$391K |
|
2369
CALL
M/I Homes
MHO
$3.89B
| $1.14M | ﹤0.01% |
9,300
+3,800
| +69% | +$512K |
|
2370
Quantum Computing Inc
QUBT
$1.74B
| $1.14M | ﹤0.01% |
166,052
-382,997
| -70% | -$3.5M |
|
2371
CALL
Franklin Resources
BEN
$17.3B
| $1.14M | ﹤0.01% |
48,100
-103,100
| -68% | -$2.65M |
|
2372
PUT
ProShares UltraShort Industrials
SIJ
$5.73M
| $1.13M | ﹤0.01% |
+12,000
| New | +$233K |
|
2373
CALL
Transmedics
TMDX
$2.64B
| $1.13M | ﹤0.01% |
11,400
-6,900
| -38% | -$900K |
|
2374
Vita Coco
COCO
$3.97B
| $1.13M | ﹤0.01% |
23,654
+18,480
| +357% | +$1.01M |
|
2375
PUT
CoreCivic
CXW
$3.03B
| $1.13M | ﹤0.01% |
59,900
-59,800
| -50% | -$1.13M |
|
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.