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 | |
|---|---|---|---|---|---|---|
2501
Remitly
RELY
$4.9B
| $1M | ﹤0.01% |
+63,964
| New | +$947K |
|
|
XOMA
2502
CALL
DELISTED
Xoma
XOMA
| $1M | ﹤0.01% |
+31,900
| New | +$854K |
|
2503
CALL
Ardagh Metal Packaging
AMBP
$2.96B
| $1,000K | ﹤0.01% |
246,800
+245,900
| +27,322% | +$1.09M |
|
2504
PUT
Viatris
VTRS
$20.8B
| $994K | ﹤0.01% |
73,600
-48,200
| -40% | -$675K |
|
2505
CALL
ProPetro Holding
PUMP
$1.25B
| $993K | ﹤0.01% |
68,900
+9,700
| +16% | +$116K |
|
2506
PUT
Uranium Energy
UEC
$4.47B
| $992K | ﹤0.01% |
73,500
-288,800
| -80% | -$4.45M |
|
2507
CALL
American Superconductor
AMSC
$1.29B
| $992K | ﹤0.01% |
+29,300
| New | +$925K |
|
2508
CALL
International Seaways
INSW
$4.68B
| $991K | ﹤0.01% |
13,600
+12,100
| +807% | +$774K |
|
|
AMRZ
2509
Amrize Ltd
AMRZ
$27.4B
| $990K | ﹤0.01% |
17,681
+1,805
| +11% | +$104K |
|
|
BBBY
2510
PUT
Bed Bath & Beyond
BBBY
$479M
| $990K | ﹤0.01% |
494,700
+94,500
| +24% | +$529K |
|
2511
PUT
SouthState Bank Corp
SSB
$10.3B
| $990K | ﹤0.01% |
10,700
+8,200
| +328% | +$804K |
|
|
SNDK
2512
Sandisk
SNDK
$150B
| $990K | ﹤0.01% |
1,558
-64,337
| -98% | -$36.3M |
|
2513
CALL
Molina Healthcare
MOH
$10.4B
| $986K | ﹤0.01% |
7,400
-2,200
| -23% | -$350K |
|
2514
eBay
EBAY
$51.2B
| $986K | ﹤0.01% |
10,835
-71,025
| -87% | -$6.38M |
|
|
ARIS
2515
CALL
Aris Mining
ARIS
$2.87B
| $986K | ﹤0.01% |
53,100
+22,700
| +75% | +$429K |
|
2516
Madison Square Garden
MSGS
$9.59B
| $985K | ﹤0.01% |
+3,066
| New | +$914K |
|
2517
CALL
Cboe Global Markets
CBOE
$32.2B
| $984K | ﹤0.01% |
3,500
-7,200
| -67% | -$2M |
|
2518
CALL
Kinetik
KNTK
$3.72B
| $983K | ﹤0.01% |
20,300
-53,600
| -73% | -$2.28M |
|
2519
CALL
Principal Financial Group
PFG
$24.3B
| $982K | ﹤0.01% |
+10,900
| New | +$996K |
|
2520
CALL
CDW
CDW
$18.9B
| $980K | ﹤0.01% |
8,100
+7,600
| +1,520% | +$960K |
|
2521
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$276M
| $979K | ﹤0.01% |
11,400
+6,600
| +138% | +$452K |
|
2522
PBF Energy
PBF
$7.49B
| $978K | ﹤0.01% |
20,548
+18,951
| +1,187% | +$710K |
|
2523
Alkami Technology
ALKT
$1.96B
| $976K | ﹤0.01% |
62,281
+60,013
| +2,646% | +$1.11M |
|
|
MIAX
2524
Miami International Holdings
MIAX
$4.49B
| $974K | ﹤0.01% |
25,016
+25,008
| +312,600% | +$1.03M |
|
2525
CALL
BBVA Argentina
BBAR
$3.85B
| $973K | ﹤0.01% |
60,600
-12,300
| -17% | -$204K |
|
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.