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 | |
|---|---|---|---|---|---|---|
3326
CALL
NovoCure
NVCR
$1.77B
| $474K | ﹤0.01% |
43,500
-37,100
| -46% | -$463K |
|
|
LAC
3327
PUT
Lithium Americas
LAC
$1.01B
| $474K | ﹤0.01% |
119,900
-143,900
| -55% | -$707K |
|
3328
CALL
Expro Ltd
XPRO
$1.71B
| $474K | ﹤0.01% |
27,200
+26,200
| +2,620% | +$430K |
|
3329
PUT
Genworth Financial
GNW
$3.81B
| $473K | ﹤0.01% |
58,300
-6,200
| -10% | -$52.6K |
|
|
IREZ
3330
Tradr 2X Short IREN Daily ETF
IREZ
$7.5M
| $473K | ﹤0.01% |
+5,235
| New | +$397K |
|
3331
CALL
Upexi
UPXI
$59.5M
| $472K | ﹤0.01% |
479,400
+242,700
| +103% | +$325K |
|
3332
CALL
Kodiak Gas Services
KGS
$5.88B
| $472K | ﹤0.01% |
8,100
+4,100
| +103% | +$199K |
|
3333
Helix Energy Solutions
HLX
$1.36B
| $472K | ﹤0.01% |
+47,686
| New | +$406K |
|
3334
Itron
ITRI
$4.33B
| $471K | ﹤0.01% |
+5,259
| New | +$505K |
|
3335
CALL
GoDaddy
GDDY
$13.2B
| $471K | ﹤0.01% |
5,700
-14,300
| -72% | -$1.36M |
|
|
GRAL
3336
PUT
GRAIL Inc
GRAL
$3.05B
| $470K | ﹤0.01% |
9,100
-27,300
| -75% | -$2.11M |
|
|
CGAU
3337
CALL
Centerra Gold
CGAU
$3.58B
| $470K | ﹤0.01% |
26,400
-15,600
| -37% | -$277K |
|
3338
PUT
Brookfield
BN
$103B
| $469K | ﹤0.01% |
11,600
+2,500
| +27% | +$111K |
|
3339
PUT
BioMarin Pharmaceuticals
BMRN
$11.7B
| $469K | ﹤0.01% |
8,300
-35,300
| -81% | -$2.06M |
|
3340
Fair Isaac
FICO
$24.6B
| $469K | ﹤0.01% |
+439
| New | +$602K |
|
3341
PUT
Pilgrim's Pride
PPC
$6.99B
| $468K | ﹤0.01% |
12,400
+9,900
| +396% | +$399K |
|
3342
PUT
FIGS
FIGS
$1.75B
| $468K | ﹤0.01% |
31,700
-39,400
| -55% | -$505K |
|
3343
iShares MSCI Malaysia ETF
EWM
$312M
| $468K | ﹤0.01% |
+16,475
| New | +$476K |
|
|
KNGS
3344
PUT
DELISTED
Roundhill S&P Dividend Monarchs ETF
KNGS
| $467K | ﹤0.01% |
22,700
-25,000
| -52% | -$515K |
|
3345
Hormel Foods
HRL
$14B
| $467K | ﹤0.01% |
20,626
-13,240
| -39% | -$316K |
|
3346
PUT
Avista
AVA
$3.39B
| $466K | ﹤0.01% |
11,600
+1,600
| +16% | +$64.6K |
|
|
UROY
3347
CALL
Uranium Royalty Corp
UROY
$1.3B
| $465K | ﹤0.01% |
127,500
-309,200
| -71% | -$1.26M |
|
3348
PUT
Universal Health Services
UHS
$9.88B
| $465K | ﹤0.01% |
2,600
-19,300
| -88% | -$3.96M |
|
3349
PUT
Olema Pharmaceuticals
OLMA
$1.03B
| $465K | ﹤0.01% |
31,200
-4,800
| -13% | -$107K |
|
3350
Alkermes
ALKS
$8.39B
| $465K | ﹤0.01% |
+13,138
| New | +$408K |
|
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.