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 | |
|---|---|---|---|---|---|---|
|
STUB
3101
PUT
StubHub Holdings
STUB
$3.2B
| $577K | ﹤0.01% |
92,500
-21,400
| -19% | -$223K |
|
3102
PUT
Upbound Group
UPBD
$1.22B
| $576K | ﹤0.01% |
31,900
+24,800
| +349% | +$483K |
|
3103
Ryanair
RYAAY
$30B
| $575K | ﹤0.01% |
+9,942
| New | +$656K |
|
3104
PENN Entertainment
PENN
$2.84B
| $573K | ﹤0.01% |
+38,124
| New | +$530K |
|
3105
New Oriental
EDU
$9.32B
| $570K | ﹤0.01% |
+10,072
| New | +$575K |
|
3106
Check Point Software Technologies
CHKP
$14.3B
| $570K | ﹤0.01% |
+3,991
| New | +$668K |
|
3107
PUT
TripAdvisor
TRIP
$1.7B
| $569K | ﹤0.01% |
53,400
-62,000
| -54% | -$722K |
|
3108
Wabtec
WAB
$49.3B
| $568K | ﹤0.01% |
2,273
+693
| +44% | +$168K |
|
3109
CALL
Avnet
AVT
$6.86B
| $567K | ﹤0.01% |
+9,200
| New | +$547K |
|
3110
PUT
Alliance Resource Partners
ARLP
$3.34B
| $567K | ﹤0.01% |
+20,500
| New | +$531K |
|
3111
CALL
Pampa Energía
PAM
$4.57B
| $566K | ﹤0.01% |
6,400
+6,000
| +1,500% | +$498K |
|
3112
CALL
Nutanix
NTNX
$16.1B
| $566K | ﹤0.01% |
14,900
-168,800
| -92% | -$7.11M |
|
3113
CALL
PACCAR
PCAR
$70.5B
| $566K | ﹤0.01% |
4,900
-57,000
| -92% | -$6.89M |
|
3114
Brinker International
EAT
$8.82B
| $565K | ﹤0.01% |
+3,957
| New | +$603K |
|
3115
PayPal
PYPL
$49.9B
| $565K | ﹤0.01% |
12,488
-25,560
| -67% | -$1.23M |
|
3116
PUT
The GEO Group
GEO
$4B
| $565K | ﹤0.01% |
33,600
-49,700
| -60% | -$789K |
|
3117
CALL
nLIGHT
LASR
$3.33B
| $564K | ﹤0.01% |
9,900
+8,900
| +890% | +$482K |
|
3118
CALL
Ventas
VTR
$47.5B
| $564K | ﹤0.01% |
6,900
+5,800
| +527% | +$475K |
|
3119
Henry Schein
HSIC
$9.78B
| $563K | ﹤0.01% |
7,643
-442
| -5% | -$34.1K |
|
|
BORR
3120
PUT
Borr Drilling
BORR
$1.19B
| $563K | ﹤0.01% |
97,600
+42,400
| +77% | +$217K |
|
3121
Woodward
WWD
$23B
| $563K | ﹤0.01% |
+1,573
| New | +$566K |
|
3122
Portillo's
PTLO
$345M
| $563K | ﹤0.01% |
106,348
+14,502
| +16% | +$78.9K |
|
3123
CALL
Ecovyst
ECVT
$1.32B
| $562K | ﹤0.01% |
43,700
+34,900
| +397% | +$394K |
|
3124
PUT
Bath & Body Works
BBWI
$3.97B
| $562K | ﹤0.01% |
30,100
-67,700
| -69% | -$1.46M |
|
3125
PUT
Sally Beauty Holdings
SBH
$1.47B
| $561K | ﹤0.01% |
40,500
+23,700
| +141% | +$361K |
|
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.