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 | |
|---|---|---|---|---|---|---|
2576
PUT
Woodward
WWD
$23B
| $931K | ﹤0.01% |
2,600
+2,200
| +550% | +$792K |
|
2577
CALL
Structure Therapeutics
GPCR
$3.37B
| $930K | ﹤0.01% |
19,300
+6,500
| +51% | +$445K |
|
|
PMT
2578
PennyMac Mortgage Investment
PMT
$845M
| $930K | ﹤0.01% |
79,747
+55,602
| +230% | +$686K |
|
2579
CALL
Sasol
SSL
$7.4B
| $929K | ﹤0.01% |
71,700
+68,700
| +2,290% | +$600K |
|
2580
CALL
Whirlpool
WHR
$2.49B
| $927K | ﹤0.01% |
17,200
-50,700
| -75% | -$3.72M |
|
|
VSXY
2581
CALL
Victoria's Secret
VSXY
$7.09B
| $927K | ﹤0.01% |
20,000
-36,700
| -65% | -$2.05M |
|
2582
CALL
Nice
NICE
$6.15B
| $926K | ﹤0.01% |
8,400
-35,300
| -81% | -$4.03M |
|
2583
Trex
TREX
$4.4B
| $924K | ﹤0.01% |
25,372
+4,525
| +22% | +$182K |
|
2584
PUT
iShares iBonds 2030 Term High Yield and Income ETF
IBHJ
$151M
| $924K | ﹤0.01% |
9,700
+7,800
| +411% | +$207K |
|
2585
Ardmore Shipping
ASC
$683M
| $924K | ﹤0.01% |
60,581
+49,584
| +451% | +$681K |
|
2586
CALL
Reservoir Media
RSVR
$727M
| $923K | ﹤0.01% |
94,300
-81,600
| -46% | -$677K |
|
2587
CALL
Richtech Robotics
RR
$302M
| $922K | ﹤0.01% |
441,100
+29,400
| +7% | +$90.4K |
|
2588
VanEck Inflation Allocation ETF
RAAX
$1.11B
| $921K | ﹤0.01% |
+22,633
| New | +$892K |
|
2589
CALL
Progress Software
PRGS
$1.75B
| $921K | ﹤0.01% |
35,900
+3,900
| +12% | +$149K |
|
2590
CALL
CG Oncology
CGON
$6.1B
| $920K | ﹤0.01% |
13,600
-40,100
| -75% | -$2.27M |
|
2591
CALL
Atlanta Braves Holdings Series B
BATRK
$3.28B
| $920K | ﹤0.01% |
20,200
+6,400
| +46% | +$266K |
|
2592
PUT
Powell Industries
POWL
$6.79B
| $920K | ﹤0.01% |
5,100
-1,500
| -23% | -$245K |
|
2593
PUT
Huntsman Corp
HUN
$2.1B
| $920K | ﹤0.01% |
69,100
-12,400
| -15% | -$150K |
|
2594
CALL
EXL Service
EXLS
$5.5B
| $920K | ﹤0.01% |
+30,200
| New | +$1.04M |
|
|
NAK
2595
CALL
Northern Dynasty Minerals
NAK
$773M
| $919K | ﹤0.01% |
+656,700
| New | +$1.14M |
|
2596
Direxion Daily MSCI South Korea Bull 3X ETF
KORU
$902M
| $918K | ﹤0.01% |
+64,600
| New | +$1.16M |
|
2597
PUT
J.M. Smucker
SJM
$13.5B
| $916K | ﹤0.01% |
9,500
-1,700
| -15% | -$178K |
|
|
ETHE
2598
Grayscale Ethereum Staking ETF Shares
ETHE
$1.53B
| $915K | ﹤0.01% |
+53,616
| New | +$1.05M |
|
2599
Tronox
TROX
$967M
| $915K | ﹤0.01% |
93,642
+61,295
| +189% | +$425K |
|
2600
CALL
Five Below
FIVE
$11.6B
| $914K | ﹤0.01% |
4,000
-20,900
| -84% | -$4.37M |
|
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.