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 |
iShares Russell 2000 ETF
IWM
|
+$146M |
| 2 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$108M |
| 3 |
Apple
AAPL
|
+$62.9M |
| 4 |
Tesla
TSLA
|
+$51.9M |
| 5 |
Micron Technology
MU
|
+$39.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$108M |
| 2 |
Meta Platforms (Facebook)
META
|
+$104M |
| 3 |
Advanced Micro Devices
AMD
|
+$92.1M |
| 4 |
Amazon
AMZN
|
+$90.3M |
| 5 |
TSMC
TSM
|
+$82.9M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 98.28% |
| 2 | Technology | 0.76% |
| 3 | Consumer Discretionary | 0.21% |
| 4 | Communication Services | 0.19% |
| 5 | Healthcare | 0.15% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
226
CALL
Direxion Daily S&P Oil & Gas Exp. & Prod. Bull 2X ETF
GUSH
$206M
| $53.8M | 0.03% |
2,160,800
+291,600
| +16% | +$10.7M |
|
227
PUT
Delta Air Lines
DAL
$55.9B
| $53.3M | 0.03% |
569,300
-497,200
| -47% | -$37.5M |
|
|
NVO
228
PUT
Novo Nordisk
NVO
$171B
| $53.2M | 0.03% |
1,109,700
-823,400
| -43% | -$35.4M |
|
229
CALL
American Airlines Group
AAL
$9.18B
| $53M | 0.03% |
2,932,800
-831,000
| -22% | -$11.1M |
|
230
PUT
Texas Instruments
TXN
$254B
| $52.6M | 0.03% |
176,400
+81,700
| +86% | +$22.7M |
|
231
PUT
IonQ
IONQ
$18.4B
| $52.4M | 0.03% |
984,100
+285,300
| +41% | +$14.5M |
|
232
CALL
Strive Inc
ASST
$2.86B
| $52.2M | 0.03% |
4,681,800
-1,928,000
| -29% | -$28.5M |
|
233
United States Oil Fund
USO
$1.96B
| $52.2M | 0.03% |
490,737
+160,949
| +49% | +$21.1M |
|
234
CALL
Wells Fargo
WFC
$251B
| $52.2M | 0.03% |
632,000
-385,200
| -38% | -$31M |
|
235
Alphabet (Google) Class C
GOOG
$4.17T
| $52.2M | 0.03% |
147,687
+2,294
| +2% | +$820K |
|
|
236
CALL
Texas Instruments
TXN
$254B
| $52M | 0.03% |
174,600
-49,200
| -22% | -$13.6M |
|
237
CALL
Shopify
SHOP
$183B
| $51.4M | 0.03% |
449,800
+53,900
| +14% | +$6.15M |
|
238
CALL
GraniteShares Bloomberg Commodity Broad Strategy No K-1 ETF
COMB
$162M
| $50.9M | 0.03% |
1,750,800
+998,700
| +133% | +$26.2M |
|
|
239
PUT
American Airlines Group
AAL
$9.18B
| $50.3M | 0.03% |
2,783,900
-1,105,500
| -28% | -$14.8M |
|
240
PUT
Moderna
MRNA
$79.4B
| $50.3M | 0.03% |
717,800
-271,400
| -27% | -$14M |
|
241
PUT
NextEra Energy
NEE
$159B
| $50.1M | 0.03% |
570,300
-30,100
| -5% | -$2.72M |
|
242
CALL
Merck
MRK
$367B
| $49.3M | 0.03% |
384,000
-242,100
| -39% | -$28.3M |
|
243
CALL
Ford
F
$50.7B
| $49.2M | 0.03% |
3,537,800
+1,180,700
| +50% | +$15.9M |
|
244
PUT
Rocket Lab Corp
RKLB
$47.3B
| $48.3M | 0.03% |
474,900
+61,000
| +15% | +$6.08M |
|
|
ECHO
245
PUT
EchoStar
ECHO
$26.2B
| $48.3M | 0.03% |
475,500
+122,100
| +35% | +$14.9M |
|
246
PUT
Vertiv
VRT
$97.5B
| $47.8M | 0.03% |
142,800
-16,300
| -10% | -$5.17M |
|
247
PUT
Home Depot
HD
$293B
| $47.8M | 0.03% |
135,400
-29,900
| -18% | -$9.73M |
|
248
CALL
Johnson & Johnson
JNJ
$654B
| $47.4M | 0.03% |
186,700
-149,200
| -44% | -$34.8M |
|
249
PUT
Costco
COST
$409B
| $47.1M | 0.03% |
50,400
-21,300
| -30% | -$21.2M |
|
250
PUT
Rivian
RIVN
$22.4B
| $47.1M | 0.03% |
2,714,500
+335,900
| +14% | +$5.24M |
|
Similar funds
Simplex Trading's Q2 2026 Portfolio in Review
As of Q2 2026, Simplex Trading held 10,638 positions worth $171B, up 14% from $149B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q2 2026 filing shows 1,714 new, 3,712 increased, 3,486 reduced and 1,487 closed positions. Its largest new stake was Micron Technology: 52,682 shares worth $60.8M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $108M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, down from 98% a quarter earlier, followed by Technology and Consumer Discretionary.
- Simplex Trading's largest Q2 2026 buy was Micron Technology: 52,682 shares worth $60.8M.
- Simplex Trading added most to iShares Russell 2000 ETF in Q2 2026, an estimated $146M increase.
- Simplex Trading's biggest Q2 2026 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $108M.
- Simplex Trading fully exited Intel in Q2 2026, selling an estimated $76.6M.
- Simplex Trading's ten largest holdings make up 50% of its $171B portfolio in Q2 2026.
- Simplex Trading opened 1,714 new positions and closed 1,487 in Q2 2026.
- Simplex Trading's portfolio value rose 14% quarter-over-quarter to $171B.
Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.