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 | |
|---|---|---|---|---|---|---|
626
CALL
Etsy
ETSY
$7.68B
| $12M | 0.01% |
240,800
-352,100
| -59% | -$19.2M |
|
627
Morgan Stanley
MS
$338B
| $12M | 0.01% |
73,071
+5,845
| +9% | +$1.01M |
|
628
CALL
iPath Series B S&P 500 VIX Short-Term Futures ETN
VXX
$163M
| $12M | 0.01% |
336,600
+115,000
| +52% | +$3.42M |
|
629
CALL
Jabil
JBL
$33.7B
| $12M | 0.01% |
45,200
+9,200
| +26% | +$2.32M |
|
630
CALL
Colgate-Palmolive
CL
$72.1B
| $12M | 0.01% |
140,700
+48,000
| +52% | +$4.28M |
|
631
CALL
United States Natural Gas Fund
UNG
$473M
| $12M | 0.01% |
1,021,900
+620,400
| +155% | +$7.66M |
|
|
UCD
632
PUT
DELISTED
PROSHARES ULTRA BLOOMBERG COMMODITY
UCD
| $11.9M | 0.01% |
117,900
-20,000
| -15% | -$2.02M |
|
633
PUT
Nucor
NUE
$54.9B
| $11.9M | 0.01% |
70,300
-22,900
| -25% | -$3.99M |
|
634
CALL
Wheaton Precious Metals
WPM
$50B
| $11.9M | 0.01% |
+90,500
| New | +$12.6M |
|
635
CALL
Howmet Aerospace
HWM
$115B
| $11.8M | 0.01% |
51,200
+5,500
| +12% | +$1.28M |
|
636
PUT
SiriusXM
SIRI
$10.1B
| $11.8M | 0.01% |
510,800
-102,200
| -17% | -$2.2M |
|
637
CALL
Pinterest
PINS
$12.3B
| $11.8M | 0.01% |
642,300
-606,700
| -49% | -$12.7M |
|
638
PUT
Zscaler
ZS
$22.6B
| $11.8M | 0.01% |
83,900
-25,100
| -23% | -$4.45M |
|
639
CALL
Ciena
CIEN
$57.7B
| $11.8M | 0.01% |
30,300
-23,300
| -43% | -$7.13M |
|
640
PUT
Hewlett Packard
HPE
$63.1B
| $11.8M | 0.01% |
+493,900
| New | +$10.9M |
|
641
CALL
Lyft
LYFT
$5.32B
| $11.7M | 0.01% |
877,700
-734,800
| -46% | -$11.4M |
|
642
PUT
American Tower
AMT
$76.7B
| $11.6M | 0.01% |
67,400
+34,800
| +107% | +$6.26M |
|
643
CALL
Li Auto
LI
$12.9B
| $11.6M | 0.01% |
650,200
-95,400
| -13% | -$1.67M |
|
644
CALL
AstraZeneca
AZN
$261B
| $11.6M | 0.01% |
58,700
-15,600
| -21% | -$3.01M |
|
645
CALL
Schwab US Broad Market ETF
SCHB
$42.7B
| $11.6M | 0.01% |
381,500
-84,700
| -18% | -$2.22M |
|
646
CALL
Diamondback Energy
FANG
$57.8B
| $11.5M | 0.01% |
58,300
-41,400
| -42% | -$7.04M |
|
647
PUT
Kroger
KR
$34.2B
| $11.3M | 0.01% |
156,400
+57,300
| +58% | +$3.88M |
|
648
PUT
Wayfair
W
$10.9B
| $11.3M | 0.01% |
150,300
-209,500
| -58% | -$19M |
|
649
PUT
Southwest Airlines
LUV
$21.9B
| $11.3M | 0.01% |
300,200
-376,200
| -56% | -$17M |
|
650
PUT
Energy Fuels
UUUU
$3B
| $11.2M | 0.01% |
615,000
-677,000
| -52% | -$14M |
|
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.