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 | Miscellaneous | 98.3% |
| 2 | Technology | 0.62% |
| 3 | Communication Services | 0.22% |
| 4 | Consumer Discretionary | 0.21% |
| 5 | Healthcare | 0.2% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3251
CALL
iShares Convertible Bond ETF
ICVT
$8.03B
| $506K | ﹤0.01% |
12,400
-5,000
| -29% | -$517K |
|
|
SOBO
3252
South Bow Corp
SOBO
$6.91B
| $506K | ﹤0.01% |
+15,182
| New | +$461K |
|
3253
CALL
OppFi
OPFI
$514M
| $506K | ﹤0.01% |
65,600
+7,200
| +12% | +$65.9K |
|
|
VSXY
3254
PUT
Victoria's Secret
VSXY
$7.06B
| $505K | ﹤0.01% |
10,900
-22,600
| -67% | -$1.26M |
|
3255
PUT
CoinShares Bitcoin and Ether ETF
BTF
$17.3M
| $505K | ﹤0.01% |
+14,500
| New | +$317K |
|
|
CMBT
3256
CMB.TECH NV
CMBT
$5.49B
| $505K | ﹤0.01% |
39,909
-35,084
| -47% | -$440K |
|
3257
PUT
Microvast
MVST
$246M
| $504K | ﹤0.01% |
336,200
+152,900
| +83% | +$368K |
|
3258
PUT
Vaalco Energy
EGY
$595M
| $504K | ﹤0.01% |
79,500
+72,600
| +1,052% | +$366K |
|
3259
PUT
Prairie Operating Co
PROP
$46.4M
| $504K | ﹤0.01% |
248,100
+247,600
| +49,520% | +$447K |
|
|
CFGE
3260
PUT
DELISTED
CALAMOS ETF TR FOCUS GROWTH ETF
CFGE
| $503K | ﹤0.01% |
20,000
+19,300
| +2,757% | +$485K |
|
3261
PUT
Klaviyo
KVYO
$4.48B
| $502K | ﹤0.01% |
25,800
+9,500
| +58% | +$204K |
|
3262
JFrog
FROG
$12B
| $502K | ﹤0.01% |
+10,698
| New | +$525K |
|
3263
PUT
Cooper-Standard Automotive
CPS
$370M
| $502K | ﹤0.01% |
18,000
-10,700
| -37% | -$358K |
|
3264
UWM Holdings
UWMC
$407M
| $502K | ﹤0.01% |
+138,546
| New | +$638K |
|
3265
CALL
Crown Holdings
CCK
$11.5B
| $501K | ﹤0.01% |
5,000
-8,100
| -62% | -$866K |
|
3266
Toll Brothers
TOL
$12.4B
| $501K | ﹤0.01% |
+3,671
| New | +$539K |
|
3267
ICICI Bank
IBN
$98.9B
| $501K | ﹤0.01% |
19,325
+13,700
| +244% | +$402K |
|
|
ASRT
3268
CALL
DELISTED
Assertio
ASRT
| $499K | ﹤0.01% |
26,200
+2,900
| +12% | +$35.7K |
|
3269
PUT
Goldman Sachs Access US Aggregate Bond ETF
GCOR
$801M
| $498K | ﹤0.01% |
10,000
-12,700
| -56% | -$528K |
|
|
TEM
3270
Tempus AI
TEM
$14.9B
| $497K | ﹤0.01% |
+10,990
| New | +$625K |
|
3271
CALL
Melco Resorts & Entertainment
MLCO
$1.7B
| $496K | ﹤0.01% |
+87,400
| New | +$529K |
|
3272
Corbus Pharmaceuticals
CRBP
$132M
| $496K | ﹤0.01% |
+52,836
| New | +$445K |
|
3273
PUT
Patterson-UTI
PTEN
$4.16B
| $496K | ﹤0.01% |
45,800
-133,600
| -74% | -$1.14M |
|
3274
PUT
Grayscale Bitcoin Trust
GBTC
$12.5B
| $496K | ﹤0.01% |
9,400
-56,600
| -86% | -$3.37M |
|
3275
CALL
Lionsgate Studios
LION
$3.33B
| $496K | ﹤0.01% |
51,700
+6,600
| +15% | +$60.9K |
|
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's Q1 2026 filing shows 2,157 new, 2,651 increased, 3,926 reduced and 1,574 closed positions. Its largest new stake was Amazon: 764,884 shares worth $159M. The largest sale was Apple, an estimated $174M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 98% a quarter earlier, followed by Technology and Communication Services.
- 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 2,157 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.