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 | |
|---|---|---|---|---|---|---|
201
CALL
Coca-Cola
KO
$378B
| $63.8M | 0.04% |
785,000
-17,500
| -2% | -$1.38M |
|
202
PUT
Pfizer
PFE
$163B
| $63.4M | 0.04% |
2,631,800
+44,200
| +2% | +$1.16M |
|
|
203
Tesla
TSLA
$1.47T
| $63.4M | 0.04% |
150,665
+130,488
| +647% | +$51.9M |
|
|
204
PUT
Coca-Cola
KO
$378B
| $63M | 0.04% |
774,900
-43,300
| -5% | -$3.42M |
|
205
PUT
Vanguard S&P 500 ETF
VOO
$1.06T
| $62.7M | 0.04% |
380,600
+221,900
| +140% | +$148M |
|
|
206
Micron Technology
MU
$1.22T
| $60.8M | 0.04% |
+52,682
| New | +$39.5M |
|
207
PUT
ProShares UltraPro Short QQQ
SQQQ
$1.88B
| $60.7M | 0.04% |
1,422,700
+24,400
| +2% | +$1.18M |
|
208
PUT
Carnival Corporation Ltd
CCL
$30.5B
| $59.9M | 0.04% |
2,095,300
+421,500
| +25% | +$11.5M |
|
|
QLTB
209
PUT
DELISTED
ISHARES BAA BA RATED CORP BOND FUND
QLTB
| $59.8M | 0.04% |
175,500
+164,500
| +1,495% | +$56M |
|
210
CALL
GameStop
GME
$11.8B
| $59.7M | 0.04% |
3,968,800
+498,400
| +14% | +$11.4M |
|
211
PUT
SoFi Technologies
SOFI
$21.4B
| $59.1M | 0.03% |
3,294,500
-336,400
| -9% | -$5.7M |
|
212
PUT
Chevron
CVX
$401B
| $58.7M | 0.03% |
354,300
-173,800
| -33% | -$32.3M |
|
213
PUT
Reddit
RDDT
$28.8B
| $57.8M | 0.03% |
333,000
+66,600
| +25% | +$10.7M |
|
214
PUT
Verizon
VZ
$196B
| $57.6M | 0.03% |
1,360,700
+20,000
| +1% | +$938K |
|
215
PUT
Wells Fargo
WFC
$251B
| $57.5M | 0.03% |
695,700
-214,400
| -24% | -$17.2M |
|
216
CALL
iShares Gold Trust
IAU
$63.6B
| $57.2M | 0.03% |
757,200
+16,100
| +2% | +$1.37M |
|
217
PUT
Snowflake
SNOW
$119B
| $56.9M | 0.03% |
223,500
+28,900
| +15% | +$5.32M |
|
218
CALL
ARK Space & Defense Innovation ETF
ARKX
$775M
| $56.8M | 0.03% |
835,400
+41,500
| +5% | +$1.4M |
|
219
CALL
Nu Holdings
NU
$65.6B
| $56.7M | 0.03% |
4,244,600
+1,843,800
| +77% | +$24.9M |
|
220
PUT
Royal Caribbean
RCL
$64.9B
| $55.7M | 0.03% |
175,500
+56,100
| +47% | +$15.7M |
|
221
PUT
Starbucks
SBUX
$108B
| $55.7M | 0.03% |
545,300
+93,000
| +21% | +$9.37M |
|
|
222
CALL
Verizon
VZ
$196B
| $55.6M | 0.03% |
1,313,400
-318,300
| -20% | -$14.9M |
|
223
PUT
TeraWulf
WULF
$7.85B
| $55.2M | 0.03% |
2,233,200
-486,200
| -18% | -$11.2M |
|
224
CALL
United Parcel Service
UPS
$79.9B
| $55.1M | 0.03% |
512,700
-109,800
| -18% | -$11.4M |
|
225
CALL
SLB Ltd
SLB
$76.5B
| $54.2M | 0.03% |
1,165,800
+256,000
| +28% | +$13.7M |
|
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.