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 | |
|---|---|---|---|---|---|---|
5476
CALL
Ezcorp Inc
EZPW
$1.82B
| $71.1K | ﹤0.01% |
2,800
+800
| +40% | +$19.2K |
|
5477
PUT
STAAR Surgical
STAA
$1.16B
| $71.1K | ﹤0.01% |
3,800
+1,900
| +100% | +$36.3K |
|
5478
CALL
Arcos Dorados Holdings
ARCO
$1.73B
| $71K | ﹤0.01% |
8,600
-25,800
| -75% | -$209K |
|
5479
Spero Therapeutics
SPRO
$68.9M
| $70.9K | ﹤0.01% |
30,304
-5,382
| -15% | -$12.8K |
|
5480
Better Home & Finance Holding
BETR
$412M
| $70.7K | ﹤0.01% |
+1,986
| New | +$63.7K |
|
5481
nCino
NCNO
$1.81B
| $70.6K | ﹤0.01% |
+4,716
| New | +$88.6K |
|
5482
PUT
GeneDx Holdings
WGS
$1.75B
| $70.6K | ﹤0.01% |
1,100
-19,400
| -95% | -$1.77M |
|
5483
nVent Electric
NVT
$24.5B
| $70.6K | ﹤0.01% |
597
-157
| -21% | -$17.8K |
|
5484
PUT
Mama's Creations
MAMA
$825M
| $70.6K | ﹤0.01% |
4,600
+2,000
| +77% | +$30.4K |
|
5485
PUT
Stride
LRN
$3.69B
| $70.5K | ﹤0.01% |
800
-7,300
| -90% | -$592K |
|
|
CRON
5486
PUT
Cronos Group
CRON
$1.05B
| $70.5K | ﹤0.01% |
28,100
-222,400
| -89% | -$579K |
|
5487
PUT
Ginkgo Bioworks
DNA
$481M
| $70.5K | ﹤0.01% |
+11,500
| New | +$95.7K |
|
5488
PUT
BlackSky Technology
BKSY
$800M
| $70.4K | ﹤0.01% |
2,800
-10,800
| -79% | -$258K |
|
5489
Altimmune
ALT
$539M
| $70.3K | ﹤0.01% |
+22,841
| New | +$97K |
|
5490
Jackson Financial
JXN
$8.32B
| $70.3K | ﹤0.01% |
665
-34
| -5% | -$3.8K |
|
5491
Tonix Pharmaceuticals
TNXP
$157M
| $70.2K | ﹤0.01% |
+5,108
| New | +$78.6K |
|
5492
Targa Resources
TRGP
$60.4B
| $70.2K | ﹤0.01% |
280
-376
| -57% | -$81.5K |
|
5493
CALL
POSCO
PKX
$15.8B
| $70.2K | ﹤0.01% |
1,200
-900
| -43% | -$54.6K |
|
5494
Arbutus Biopharma
ABUS
$865M
| $70.1K | ﹤0.01% |
15,574
-6,629
| -30% | -$29K |
|
5495
Quantum-Si Incorporated
QSI
$168M
| $70.1K | ﹤0.01% |
90,531
+10,024
| +12% | +$10.4K |
|
5496
CALL
WPP
WPP
$4.04B
| $70K | ﹤0.01% |
4,500
-900
| -17% | -$16.9K |
|
5497
PUT
American Century Diversified Corporate Bond ETF
KORP
$860M
| $69.9K | ﹤0.01% |
700
+200
| +40% | +$9.46K |
|
5498
CALL
Compugen
CGEN
$216M
| $69.9K | ﹤0.01% |
32,800
-3,500
| -10% | -$6.79K |
|
5499
CALL
Fidus Investment
FDUS
$737M
| $69.7K | ﹤0.01% |
4,000
+600
| +18% | +$11.2K |
|
5500
CALL
LXP Industrial Trust
LXP
$3.53B
| $69.4K | ﹤0.01% |
1,500
-700
| -32% | -$34.2K |
|
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.