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 | |
|---|---|---|---|---|---|---|
4726
PUT
AtaiBeckley Inc
ATAI
$2.66B
| $137K | ﹤0.01% |
38,800
-86,400
| -69% | -$325K |
|
|
BCYC
4727
CALL
Bicycle Therapeutics
BCYC
$270M
| $137K | ﹤0.01% |
29,600
+28,800
| +3,600% | +$165K |
|
4728
CALL
Indivior Pharmaceuticals
INDV
$4.79B
| $137K | ﹤0.01% |
4,500
-11,300
| -72% | -$373K |
|
4729
PUT
Compañía de Minas Buenaventura
BVN
$7.85B
| $137K | ﹤0.01% |
+3,800
| New | +$137K |
|
4730
PUT
Full Truck Alliance
YMM
$9.56B
| $137K | ﹤0.01% |
16,500
-21,000
| -56% | -$200K |
|
4731
PUT
Cerence
CRNC
$382M
| $137K | ﹤0.01% |
21,700
-4,700
| -18% | -$42.3K |
|
4732
Compass Therapeutics
CMPX
$373M
| $137K | ﹤0.01% |
25,851
+16,939
| +190% | +$97.8K |
|
4733
PUT
Chefs' Warehouse
CHEF
$3.87B
| $137K | ﹤0.01% |
+2,300
| New | +$147K |
|
4734
PUT
GATX Corp
GATX
$6.55B
| $137K | ﹤0.01% |
+800
| New | +$144K |
|
4735
CALL
Pegasystems
PEGA
$4.41B
| $136K | ﹤0.01% |
3,200
-3,200
| -50% | -$149K |
|
4736
CALL
Microbot Medical
MBOT
$115M
| $136K | ﹤0.01% |
56,500
-130,600
| -70% | -$292K |
|
4737
PUT
Sixth Street Specialty
TSLX
$1.59B
| $136K | ﹤0.01% |
+7,400
| New | +$146K |
|
4738
CALL
Tango Therapeutics
TNGX
$4.34B
| $136K | ﹤0.01% |
6,500
-34,000
| -84% | -$473K |
|
4739
CALL
CoinShares ETF Trust CoinShares Bitcoin and Ether ETF
BTF
$12.9M
| $136K | ﹤0.01% |
+3,900
| New | +$85.2K |
|
4740
CALL
Littelfuse
LFUS
$10.2B
| $136K | ﹤0.01% |
+400
| New | +$130K |
|
4741
REX FANG & Innovation Equity Premium Income ETF
FEPI
$633M
| $136K | ﹤0.01% |
+3,417
| New | +$146K |
|
4742
Ampco-Pittsburgh
AP
$167M
| $135K | ﹤0.01% |
20,162
+12,589
| +166% | +$90.5K |
|
4743
CALL
BlueLinx
BXC
$455M
| $135K | ﹤0.01% |
+2,500
| New | +$164K |
|
4744
CALL
Zymeworks
ZYME
$1.68B
| $135K | ﹤0.01% |
5,400
-3,900
| -42% | -$92.3K |
|
4745
PUT
Immatics
IMTX
$1.24B
| $135K | ﹤0.01% |
+13,700
| New | +$134K |
|
4746
CALL
Global Partners
GLP
$1.64B
| $135K | ﹤0.01% |
3,200
+100
| +3% | +$4.62K |
|
4747
CALL
NNN REIT
NNN
$9.39B
| $134K | ﹤0.01% |
3,200
+2,800
| +700% | +$121K |
|
4748
Alpha Metallurgical Resources
AMR
$1.82B
| $134K | ﹤0.01% |
+655
| New | +$133K |
|
4749
Magnite
MGNI
$2.65B
| $134K | ﹤0.01% |
11,316
-252,046
| -96% | -$3.38M |
|
4750
PUT
Abeona Therapeutics
ABEO
$345M
| $134K | ﹤0.01% |
30,000
+26,700
| +809% | +$133K |
|
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.