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 | |
|---|---|---|---|---|---|---|
2776
CALL
MINISO
MNSO
$3.88B
| $763K | ﹤0.01% |
47,100
+9,800
| +26% | +$180K |
|
2777
Shake Shack
SHAK
$2.54B
| $763K | ﹤0.01% |
8,624
+2,511
| +41% | +$231K |
|
2778
iShares MSCI South Africa ETF
EZA
$534M
| $762K | ﹤0.01% |
+11,244
| New | +$817K |
|
2779
Public Storage
PSA
$61.5B
| $762K | ﹤0.01% |
2,813
+1,371
| +95% | +$393K |
|
2780
CALL
Cemex
CX
$16.9B
| $762K | ﹤0.01% |
66,600
+29,000
| +77% | +$346K |
|
2781
PUT
Yum! Brands
YUM
$41.9B
| $762K | ﹤0.01% |
4,900
-2,700
| -36% | -$428K |
|
2782
Target Hospitality
TH
$1.43B
| $761K | ﹤0.01% |
82,038
-1,970
| -2% | -$15.6K |
|
2783
CALL
CorMedix
CRMD
$564M
| $760K | ﹤0.01% |
112,000
+35,500
| +46% | +$262K |
|
2784
PUT
Brighthouse Financial
BHF
$3.61B
| $760K | ﹤0.01% |
12,700
-9,400
| -43% | -$587K |
|
2785
PUT
Maplebear
CART
$10.7B
| $760K | ﹤0.01% |
20,300
-105,900
| -84% | -$4.02M |
|
2786
PUT
Boston Beer
SAM
$1.95B
| $760K | ﹤0.01% |
3,300
+600
| +22% | +$135K |
|
2787
PUT
Barclays
BCS
$87.8B
| $760K | ﹤0.01% |
35,900
-57,200
| -61% | -$1.39M |
|
2788
CALL
Janux Therapeutics
JANX
$912M
| $759K | ﹤0.01% |
54,600
+32,600
| +148% | +$447K |
|
2789
CALL
Western Alliance Bancorporation
WAL
$8.81B
| $758K | ﹤0.01% |
10,700
-9,400
| -47% | -$783K |
|
2790
PUT
BJs Wholesale Club
BJ
$12.8B
| $758K | ﹤0.01% |
7,700
-94,800
| -92% | -$9.14M |
|
2791
Royal Gold
RGLD
$16.6B
| $758K | ﹤0.01% |
2,977
+1,598
| +116% | +$424K |
|
2792
State Street SPDR S&P Bank ETF
KBE
$1.64B
| $757K | ﹤0.01% |
12,716
-82,948
| -87% | -$5.16M |
|
2793
PUT
Booz Allen Hamilton
BAH
$8.44B
| $757K | ﹤0.01% |
+9,700
| New | +$818K |
|
2794
Kodiak Sciences
KOD
$2.5B
| $753K | ﹤0.01% |
19,755
+13,622
| +222% | +$352K |
|
|
LKFT
2795
PUT
Lakefront Biotherapeutics American Depositary Shares
LKFT
$1.82B
| $753K | ﹤0.01% |
25,100
+24,500
| +4,083% | +$811K |
|
2796
Portland General Electric
POR
$5.82B
| $752K | ﹤0.01% |
14,245
+9,204
| +183% | +$473K |
|
2797
CALL
10x Genomics
TXG
$5.88B
| $752K | ﹤0.01% |
35,400
+25,300
| +250% | +$506K |
|
2798
Aptiv
APTV
$12.3B
| $751K | ﹤0.01% |
+10,819
| New | +$834K |
|
2799
Tencent Music
TME
$15.9B
| $751K | ﹤0.01% |
+80,911
| New | +$1.2M |
|
2800
PUT
Regions Financial
RF
$26.4B
| $750K | ﹤0.01% |
28,700
-79,200
| -73% | -$2.21M |
|
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.