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 | |
|---|---|---|---|---|---|---|
3301
Vail Resorts
MTN
$5.45B
| $484K | ﹤0.01% |
+3,775
| New | +$515K |
|
3302
PennyMac Financial
PFSI
$3.94B
| $484K | ﹤0.01% |
5,535
-9,616
| -63% | -$1.03M |
|
3303
CRH
CRH
$64.1B
| $484K | ﹤0.01% |
+4,601
| New | +$540K |
|
3304
Cincinnati Financial
CINF
$26.8B
| $483K | ﹤0.01% |
3,072
-1,726
| -36% | -$281K |
|
3305
PUT
Helen of Troy
HELE
$649M
| $483K | ﹤0.01% |
33,500
+15,800
| +89% | +$276K |
|
3306
PUT
Murphy Oil
MUR
$5.48B
| $483K | ﹤0.01% |
11,700
-23,600
| -67% | -$799K |
|
3307
CALL
Elicio Therapeutics
ELTX
$76.4M
| $482K | ﹤0.01% |
45,100
+43,700
| +3,121% | +$422K |
|
3308
Pultegroup
PHM
$24.5B
| $482K | ﹤0.01% |
4,096
-2,244
| -35% | -$287K |
|
3309
Sabra Healthcare REIT
SBRA
$5.38B
| $482K | ﹤0.01% |
25,043
-4,920
| -16% | -$96.9K |
|
3310
CALL
LPL Financial
LPLA
$27.1B
| $481K | ﹤0.01% |
1,600
-5,500
| -77% | -$1.85M |
|
3311
PUT
Eton Pharmaceutcials
ETON
$1.34B
| $481K | ﹤0.01% |
19,500
+19,300
| +9,650% | +$337K |
|
3312
ProShares UltraShort Bitcoin ETF
SBIT
$163M
| $481K | ﹤0.01% |
8,445
-45,460
| -84% | -$2.38M |
|
3313
CALL
Adeia
ADEA
$2.8B
| $481K | ﹤0.01% |
20,000
+18,500
| +1,233% | +$375K |
|
3314
PUT
Ascendis Pharma A/S
ASND
$16.5B
| $480K | ﹤0.01% |
2,100
+1,200
| +133% | +$269K |
|
3315
CALL
iQIYI
IQ
$1.24B
| $480K | ﹤0.01% |
355,700
-108,000
| -23% | -$186K |
|
3316
Stride
LRN
$3.53B
| $479K | ﹤0.01% |
5,435
-1,190
| -18% | -$96.5K |
|
3317
StoneX
SNEX
$9.39B
| $478K | ﹤0.01% |
8,893
+5,210
| +141% | +$263K |
|
3318
CALL
InMode
INMD
$868M
| $477K | ﹤0.01% |
34,900
-34,700
| -50% | -$495K |
|
|
BTC
3319
PUT
Grayscale Bitcoin Mini Trust ETF
BTC
$3.43B
| $477K | ﹤0.01% |
+15,900
| New | +$537K |
|
3320
CALL
Main Street Capital
MAIN
$5.06B
| $477K | ﹤0.01% |
9,000
+5,800
| +181% | +$344K |
|
3321
CALL
Verastem
VSTM
$536M
| $476K | ﹤0.01% |
89,900
+78,800
| +710% | +$486K |
|
3322
Direxion Daily Financial Bear 3x ETF
FAZ
$84.4M
| $476K | ﹤0.01% |
9,383
+1,740
| +23% | +$77.9K |
|
3323
CALL
Wabtec
WAB
$49.4B
| $475K | ﹤0.01% |
1,900
+600
| +46% | +$145K |
|
3324
PUT
WEC Energy
WEC
$35.8B
| $475K | ﹤0.01% |
4,100
-93,200
| -96% | -$10.5M |
|
3325
Invesco DB US Dollar Index Bullish Fund
UUP
$419M
| $474K | ﹤0.01% |
+17,077
| New | +$465K |
|
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.