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 | |
|---|---|---|---|---|---|---|
101
PUT
Bank of America
BAC
$430B
| $113M | 0.08% |
2,310,300
-1,033,500
| -31% | -$53.3M |
|
102
CALL
Pinduoduo
PDD
$121B
| $112M | 0.08% |
1,100,800
-1,028,800
| -48% | -$108M |
|
103
CALL
Cisco
CSCO
$442B
| $112M | 0.08% |
1,444,300
-175,500
| -11% | -$13.7M |
|
104
CALL
Coinbase
COIN
$46.3B
| $112M | 0.08% |
640,900
-389,000
| -38% | -$76.6M |
|
105
PUT
Berkshire Hathaway Class B
BRK.B
$1.06T
| $112M | 0.08% |
233,300
-65,300
| -22% | -$32.1M |
|
106
CALL
JPMorgan Chase
JPM
$918B
| $111M | 0.07% |
377,100
-422,800
| -53% | -$128M |
|
107
PUT
Robinhood
HOOD
$95.5B
| $110M | 0.07% |
1,586,300
-522,500
| -25% | -$45.9M |
|
108
PUT
Chevron
CVX
$381B
| $109M | 0.07% |
528,100
-44,700
| -8% | -$8.15M |
|
109
CALL
United Airlines
UAL
$38.2B
| $108M | 0.07% |
1,173,800
+938,000
| +398% | +$98.3M |
|
110
CALL
Applovin
APP
$144B
| $107M | 0.07% |
269,500
-79,100
| -23% | -$38.2M |
|
111
CALL
AutoZone
AZO
$49.2B
| $104M | 0.07% |
30,900
+12,600
| +69% | +$45.2M |
|
112
PUT
Uber
UBER
$146B
| $103M | 0.07% |
1,427,700
-271,900
| -16% | -$20.9M |
|
113
CALL
Eli Lilly
LLY
$1.05T
| $102M | 0.07% |
111,200
-85,300
| -43% | -$86.5M |
|
114
PUT
State Street SPDR Portfolio Short Term Treasury ETF
SPTS
$6.07B
| $101M | 0.07% |
563,100
+309,100
| +122% | +$9.04M |
|
|
KFYP
115
PUT
DELISTED
KraneShares CICC China Leaders 100 Index ETF
KFYP
| $101M | 0.07% |
3,609,300
+1,728,000
| +92% | +$48.4M |
|
|
116
SPDR Gold Trust
GLD
$132B
| $99.2M | 0.07% |
+230,612
| New | +$103M |
|
117
PUT
Lumentum
LITE
$65.2B
| $99.1M | 0.07% |
141,000
+77,700
| +123% | +$42.7M |
|
118
PUT
GE Vernova
GEV
$290B
| $98.6M | 0.07% |
112,900
+16,300
| +17% | +$12.7M |
|
119
PUT
Marvell Technology
MRVL
$187B
| $98.5M | 0.07% |
994,100
-361,900
| -27% | -$30.4M |
|
|
120
PUT
Cisco
CSCO
$442B
| $96.1M | 0.06% |
1,239,000
-1,598,500
| -56% | -$125M |
|
121
CALL
Occidental Petroleum
OXY
$56.2B
| $94.8M | 0.06% |
1,458,200
-1,036,800
| -42% | -$52.1M |
|
122
PUT
Bloom Energy
BE
$64.4B
| $93.8M | 0.06% |
692,400
-375,100
| -35% | -$55.1M |
|
123
PUT
Visa
V
$677B
| $93.7M | 0.06% |
309,900
+85,400
| +38% | +$27.5M |
|
124
PUT
ProShares UltraPro Short QQQ
SQQQ
$1.99B
| $93.5M | 0.06% |
1,398,300
-776,600
| -36% | -$55.1M |
|
|
125
CALL
Visa
V
$677B
| $93M | 0.06% |
307,700
-90,600
| -23% | -$29.1M |
|
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.