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 | |
|---|---|---|---|---|---|---|
|
HSAI
2201
PUT
Hesai Group
HSAI
$2.5B
| $1.33M | ﹤0.01% |
69,700
+29,900
| +75% | +$754K |
|
2202
PUT
Trex
TREX
$4.57B
| $1.33M | ﹤0.01% |
36,500
+4,400
| +14% | +$177K |
|
2203
PUT
Amkor Technology
AMKR
$11.3B
| $1.32M | ﹤0.01% |
29,400
+11,800
| +67% | +$565K |
|
|
FETH
2204
PUT
Fidelity Ethereum Fund
FETH
$1.04B
| $1.32M | ﹤0.01% |
63,400
+41,400
| +188% | +$989K |
|
2205
PUT
LPL Financial
LPLA
$27.4B
| $1.32M | ﹤0.01% |
4,400
-7,300
| -62% | -$2.45M |
|
2206
PUT
AvalonBay Communities
AVB
$27.2B
| $1.32M | ﹤0.01% |
8,100
+5,800
| +252% | +$1.01M |
|
2207
CALL
Renasant Corp
RNST
$4.05B
| $1.32M | ﹤0.01% |
36,600
+34,600
| +1,730% | +$1.3M |
|
2208
CALL
Guardant Health
GH
$19B
| $1.32M | ﹤0.01% |
14,300
-13,000
| -48% | -$1.31M |
|
2209
PUT
Harmony Gold Mining
HMY
$9.7B
| $1.32M | ﹤0.01% |
85,900
-15,600
| -15% | -$308K |
|
2210
CALL
Alliance Resource Partners
ARLP
$3.33B
| $1.32M | ﹤0.01% |
+47,700
| New | +$1.23M |
|
|
HTGCR
2211
PUT
DELISTED
HERCULES TECHNOLOGY GROWTH CAP INC TRANS RGTS TO PUR COM STK
HTGCR
| $1.32M | ﹤0.01% |
89,200
+40,200
| +82% | +$594K |
|
2212
CALL
Freshpet
FRPT
$3.01B
| $1.31M | ﹤0.01% |
22,300
+2,600
| +13% | +$183K |
|
|
PPTA
2213
PUT
Perpetua Resources
PPTA
$2.18B
| $1.31M | ﹤0.01% |
46,700
-12,800
| -22% | -$387K |
|
2214
PUT
Nutrien
NTR
$33.3B
| $1.31M | ﹤0.01% |
17,400
-127,600
| -88% | -$9.1M |
|
2215
CALL
Papa John's
PZZA
$1.02B
| $1.31M | ﹤0.01% |
40,500
-53,200
| -57% | -$1.85M |
|
2216
PUT
Banco Santander
SAN
$200B
| $1.31M | ﹤0.01% |
116,200
+58,100
| +100% | +$693K |
|
2217
Crocs
CROX
$6.75B
| $1.31M | ﹤0.01% |
15,766
-8,639
| -35% | -$740K |
|
2218
PUT
T. Rowe Price
TROW
$26.1B
| $1.31M | ﹤0.01% |
14,500
-26,600
| -65% | -$2.58M |
|
2219
CALL
Bumble
BMBL
$393M
| $1.31M | ﹤0.01% |
400,700
-80,500
| -17% | -$268K |
|
|
DFTX
2220
PUT
Definium Therapeutics
DFTX
$5.57B
| $1.31M | ﹤0.01% |
69,100
-39,900
| -37% | -$677K |
|
2221
CALL
Lightwave Logic
LWLG
$887M
| $1.31M | ﹤0.01% |
185,700
+15,300
| +9% | +$72.6K |
|
2222
State Street Industrial Select Sector SPDR ETF
XLI
$33.3B
| $1.31M | ﹤0.01% |
+8,071
| New | +$1.35M |
|
2223
CALL
Alexandria Real Estate Equities
ARE
$9.41B
| $1.3M | ﹤0.01% |
+28,100
| New | +$1.48M |
|
2224
Modine Manufacturing
MOD
$11B
| $1.3M | ﹤0.01% |
6,017
+4,513
| +300% | +$850K |
|
|
OMDA
2225
CALL
Omada Health Inc
OMDA
$1.21B
| $1.3M | ﹤0.01% |
103,700
+103,600
| +103,600% | +$1.43M |
|
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.