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 | |
|---|---|---|---|---|---|---|
3701
USCF SummerHaven Dynamic Commodity Strategy No K-1 Fund
SDCI
$559M
| $334K | ﹤0.01% |
+12,254
| New | +$299K |
|
3702
Virtus Reaves Utilities ETF
UTES
$1.33B
| $334K | ﹤0.01% |
4,177
+3,973
| +1,948% | +$319K |
|
|
NAVN
3703
PUT
Navan Inc
NAVN
$6.77B
| $334K | ﹤0.01% |
25,200
+23,900
| +1,838% | +$284K |
|
3704
PUT
Prothena Corp
PRTA
$425M
| $333K | ﹤0.01% |
34,300
-126,000
| -79% | -$1.15M |
|
3705
PUT
Cognex
CGNX
$10.9B
| $333K | ﹤0.01% |
6,800
+1,800
| +36% | +$84K |
|
|
VNET
3706
PUT
VNET Group
VNET
$2.04B
| $333K | ﹤0.01% |
39,700
-28,800
| -42% | -$305K |
|
3707
CALL
Graphic Packaging
GPK
$3.17B
| $333K | ﹤0.01% |
33,500
+24,600
| +276% | +$310K |
|
3708
PUT
UroGen Pharma
URGN
$1.86B
| $333K | ﹤0.01% |
18,500
-40,900
| -69% | -$820K |
|
3709
CALL
Cirrus Logic
CRUS
$6.53B
| $333K | ﹤0.01% |
2,300
+1,500
| +188% | +$202K |
|
3710
Cenovus Energy
CVE
$55.7B
| $332K | ﹤0.01% |
12,526
-47,390
| -79% | -$1.01M |
|
3711
PUT
Affiliated Managers Group
AMG
$9.69B
| $332K | ﹤0.01% |
+1,200
| New | +$362K |
|
3712
CALL
Henry Schein
HSIC
$9.77B
| $332K | ﹤0.01% |
4,500
-46,500
| -91% | -$3.59M |
|
3713
CALL
Better Home & Finance Holding
BETR
$443M
| $331K | ﹤0.01% |
+9,300
| New | +$298K |
|
3714
Lattice Semiconductor
LSCC
$17.6B
| $331K | ﹤0.01% |
3,571
+3,523
| +7,340% | +$316K |
|
3715
CALL
Vista Gold
VGZ
$251M
| $331K | ﹤0.01% |
169,000
-111,900
| -40% | -$265K |
|
3716
CALL
CryoPort
CYRX
$761M
| $331K | ﹤0.01% |
40,000
+14,300
| +56% | +$129K |
|
3717
Ecolab
ECL
$78.1B
| $331K | ﹤0.01% |
+1,244
| New | +$351K |
|
3718
PUT
Merchants Bancorp
MBIN
$2.53B
| $330K | ﹤0.01% |
7,700
+5,500
| +250% | +$224K |
|
3719
PUT
BioCryst Pharmaceuticals
BCRX
$2.28B
| $330K | ﹤0.01% |
+34,700
| New | +$269K |
|
3720
Genco Shipping & Trading
GNK
$1.11B
| $330K | ﹤0.01% |
+14,633
| New | +$313K |
|
3721
CALL
Lamar Advertising Co
LAMR
$16.2B
| $329K | ﹤0.01% |
2,600
-9,400
| -78% | -$1.23M |
|
3722
CALL
Endava
DAVA
$158M
| $329K | ﹤0.01% |
74,500
-100,900
| -58% | -$557K |
|
3723
Future Fuel
FF
$217M
| $328K | ﹤0.01% |
85,284
+79,484
| +1,370% | +$298K |
|
|
MRSH
3724
Marsh
MRSH
$90.5B
| $328K | ﹤0.01% |
1,893
-2,910
| -61% | -$523K |
|
3725
Vital Farms
VITL
$545M
| $328K | ﹤0.01% |
+23,198
| New | +$548K |
|
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.