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 | |
|---|---|---|---|---|---|---|
3276
Atlas Lithium Corp
ATLX
$80.2M
| $495K | ﹤0.01% |
113,766
+66,360
| +140% | +$333K |
|
3277
ADMA Biologics
ADMA
$2.01B
| $495K | ﹤0.01% |
+54,917
| New | +$867K |
|
3278
Ventas
VTR
$44.7B
| $495K | ﹤0.01% |
6,049
+4,154
| +219% | +$340K |
|
3279
CALL
Genworth Financial
GNW
$3.81B
| $495K | ﹤0.01% |
60,900
+29,300
| +93% | +$249K |
|
3280
PUT
Huntington Ingalls Industries
HII
$12.6B
| $494K | ﹤0.01% |
1,300
-2,800
| -68% | -$1.15M |
|
3281
CALL
Douglas Emmett
DEI
$2.02B
| $494K | ﹤0.01% |
52,400
-65,800
| -56% | -$677K |
|
3282
CALL
IBEX
IBEX
$475M
| $493K | ﹤0.01% |
+18,400
| New | +$595K |
|
3283
PUT
Rayonier
RYN
$6.43B
| $493K | ﹤0.01% |
23,900
+16,000
| +203% | +$353K |
|
3284
PUT
DaVita
DVA
$15.3B
| $492K | ﹤0.01% |
3,200
-10,200
| -76% | -$1.38M |
|
3285
CALL
Innovative Industrial Properties
IIPR
$1.76B
| $492K | ﹤0.01% |
9,800
-24,700
| -72% | -$1.25M |
|
3286
Lloyds Banking Group
LYG
$90.7B
| $492K | ﹤0.01% |
+97,719
| New | +$536K |
|
3287
Vanguard Energy ETF
VDE
$9.97B
| $491K | ﹤0.01% |
2,840
+2,814
| +10,823% | +$426K |
|
3288
CALL
Hyster-Yale Materials Handling
HY
$600M
| $491K | ﹤0.01% |
15,100
+11,000
| +268% | +$378K |
|
3289
PUT
Tenet Healthcare
THC
$21.8B
| $491K | ﹤0.01% |
2,600
-38,000
| -94% | -$8.01M |
|
|
SA
3290
Seabridge Gold
SA
$2.89B
| $490K | ﹤0.01% |
+17,279
| New | +$552K |
|
3291
C3.ai
AI
$1.41B
| $489K | ﹤0.01% |
+58,107
| New | +$623K |
|
3292
PUT
NETGEAR
NTGR
$616M
| $489K | ﹤0.01% |
22,400
+22,300
| +22,300% | +$481K |
|
3293
CALL
Arhaus
ARHS
$1.04B
| $487K | ﹤0.01% |
71,900
+43,600
| +154% | +$396K |
|
3294
VanEck Oil Services ETF
OIH
$2.01B
| $487K | ﹤0.01% |
+1,206
| New | +$441K |
|
3295
PUT
GXO Logistics
GXO
$5.8B
| $487K | ﹤0.01% |
9,400
+3,000
| +47% | +$172K |
|
3296
CALL
Harley-Davidson
HOG
$2.59B
| $487K | ﹤0.01% |
24,100
-258,700
| -91% | -$5.07M |
|
3297
PUT
Cheesecake Factory
CAKE
$5.03B
| $487K | ﹤0.01% |
8,900
-59,000
| -87% | -$3.52M |
|
|
NAVN
3298
Navan Inc
NAVN
$6.79B
| $487K | ﹤0.01% |
36,796
+12,113
| +49% | +$144K |
|
3299
Syndax Pharmaceuticals
SNDX
$1.73B
| $486K | ﹤0.01% |
20,825
-4,835
| -19% | -$105K |
|
3300
Fresenius Medical Care
FMS
$13.8B
| $486K | ﹤0.01% |
21,521
+3,483
| +19% | +$80K |
|
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.