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 | |
|---|---|---|---|---|---|---|
151
CALL
SoFi Technologies
SOFI
$21.4B
| $91.7M | 0.05% |
5,114,100
-2,855,400
| -36% | -$48.4M |
|
152
CALL
Vanguard S&P 500 ETF
VOO
$1.06T
| $90.9M | 0.05% |
260,600
+61,100
| +31% | +$40.7M |
|
153
PUT
Carvana
CVNA
$46.8B
| $90.3M | 0.05% |
1,371,900
-638,600
| -32% | -$45.2M |
|
154
CALL
Snowflake
SNOW
$119B
| $89.6M | 0.05% |
352,000
-75,900
| -18% | -$14M |
|
155
PUT
ServiceNow
NOW
$140B
| $89.3M | 0.05% |
899,000
+508,000
| +130% | +$50.3M |
|
156
CALL
Coinbase
COIN
$51.5B
| $88M | 0.05% |
602,000
-38,900
| -6% | -$7.02M |
|
157
CALL
Freeport-McMoran
FCX
$104B
| $87.3M | 0.05% |
1,387,500
+230,600
| +20% | +$14.8M |
|
158
CALL
Walt Disney
DIS
$183B
| $85.6M | 0.05% |
889,800
+139,900
| +19% | +$14.3M |
|
159
PUT
ARK Space & Defense Innovation ETF
ARKX
$775M
| $85.6M | 0.05% |
1,100,100
+630,100
| +134% | +$21.2M |
|
160
CALL
Lumentum
LITE
$84.5B
| $85.3M | 0.05% |
99,400
+20,300
| +26% | +$18.1M |
|
161
CALL
Nokia
NOK
$58.2B
| $85.2M | 0.05% |
6,413,600
+4,194,400
| +189% | +$54M |
|
162
PUT
Morgan Stanley
MS
$308B
| $84.1M | 0.05% |
402,200
+12,200
| +3% | +$2.42M |
|
163
Oracle
ORCL
$415B
| $83.1M | 0.05% |
567,292
+52,634
| +10% | +$9.54M |
|
164
CALL
Applovin
APP
$104B
| $82.9M | 0.05% |
160,900
-108,600
| -40% | -$52.4M |
|
165
PUT
AST SpaceMobile
ASTS
$18.5B
| $82.6M | 0.05% |
929,200
+277,400
| +43% | +$24.2M |
|
166
CALL
Corning
GLW
$135B
| $80.3M | 0.05% |
314,400
-14,100
| -4% | -$2.57M |
|
|
ECHO
167
CALL
EchoStar
ECHO
$26.2B
| $80M | 0.05% |
788,300
+264,300
| +50% | +$32.3M |
|
168
PUT
Nike
NKE
$53B
| $79.5M | 0.05% |
1,935,500
+511,300
| +36% | +$22.5M |
|
|
169
CALL
Nike
NKE
$53B
| $78.1M | 0.05% |
1,902,300
+313,900
| +20% | +$13.8M |
|
170
PUT
Boeing
BA
$157B
| $77.8M | 0.05% |
359,600
-326,400
| -48% | -$72.6M |
|
171
CALL
Procter & Gamble
PG
$340B
| $77.5M | 0.05% |
528,500
+209,300
| +66% | +$30.5M |
|
172
PUT
IBM
IBM
$212B
| $76.7M | 0.05% |
272,900
+76,300
| +39% | +$19.2M |
|
173
PUT
Walmart Inc
WMT
$857B
| $76.6M | 0.04% |
676,300
-318,500
| -32% | -$39.5M |
|
174
PUT
KLA
KLAC
$245B
| $75.8M | 0.04% |
251,400
+146,400
| +139% | +$29.1M |
|
175
PUT
Salesforce
CRM
$193B
| $75.8M | 0.04% |
483,900
+70,400
| +17% | +$12.4M |
|
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.