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 | |
|---|---|---|---|---|---|---|
876
CALL
Invesco DB Base Metals Fund
DBB
$375M
| $8.2M | ﹤0.01% |
310,500
+114,200
| +58% | +$2.87M |
|
877
CALL
General Dynamics
GD
$91.1B
| $8.18M | ﹤0.01% |
23,100
+500
| +2% | +$171K |
|
878
PUT
US Bancorp Series B Preferred Stock
USB.PRH
$746M
| $8.18M | ﹤0.01% |
135,400
-59,900
| -31% | -$1.13M |
|
879
PUT
Quantum Computing Inc
QUBT
$2.03B
| $8.17M | ﹤0.01% |
842,600
+345,600
| +70% | +$3.36M |
|
880
PUT
United Rentals
URI
$65.2B
| $8.16M | ﹤0.01% |
7,200
-3,100
| -30% | -$2.95M |
|
|
PURR
881
CALL
Hyperliquid Strategies Inc
PURR
$2.54B
| $8.14M | ﹤0.01% |
1,034,800
+1,024,200
| +9,662% | +$7.58M |
|
882
PUT
DexCom
DXCM
$32.7B
| $8.12M | ﹤0.01% |
120,600
-5,800
| -5% | -$386K |
|
|
EA
883
PUT
DELISTED
Electronic Arts
EA
| $8.12M | ﹤0.01% |
39,600
+3,900
| +11% | +$790K |
|
884
CALL
Intuitive Machines
LUNR
$2.5B
| $8.11M | ﹤0.01% |
379,300
+22,600
| +6% | +$635K |
|
885
CALL
Diageo
DEO
$48.7B
| $8.11M | ﹤0.01% |
100,900
+62,500
| +163% | +$5.05M |
|
886
PUT
Target Hospitality
TH
$2.02B
| $8.11M | ﹤0.01% |
398,100
+397,600
| +79,520% | +$6.65M |
|
|
FISV
887
PUT
Fiserv Inc
FISV
$24.7B
| $8.1M | ﹤0.01% |
165,200
+38,000
| +30% | +$2.12M |
|
888
PUT
Dollar General
DG
$27.5B
| $8.09M | ﹤0.01% |
70,300
-1,300
| -2% | -$148K |
|
889
CALL
JetBlue
JBLU
$1.66B
| $8.08M | ﹤0.01% |
1,410,000
+32,300
| +2% | +$165K |
|
890
CALL
Alaska Air
ALK
$4.57B
| $8.08M | ﹤0.01% |
154,700
+47,400
| +44% | +$2.02M |
|
891
CALL
Liquidia Corp
LQDA
$6.13B
| $8.06M | ﹤0.01% |
101,100
-28,800
| -22% | -$1.54M |
|
892
CALL
Kratos Defense & Security Solutions
KTOS
$8.56B
| $8.05M | ﹤0.01% |
161,500
+114,700
| +245% | +$6.94M |
|
893
CALL
Fluor
FLR
$6.74B
| $8.05M | ﹤0.01% |
153,600
-83,800
| -35% | -$4.1M |
|
|
FIG
894
PUT
Figma
FIG
$11.1B
| $8.04M | ﹤0.01% |
444,700
+261,300
| +142% | +$5.26M |
|
895
PUT
Humana
HUM
$47.8B
| $8.02M | ﹤0.01% |
20,200
-700
| -3% | -$199K |
|
896
PUT
Jabil
JBL
$33.2B
| $8.02M | ﹤0.01% |
20,800
-20,600
| -50% | -$7.12M |
|
897
CALL
Barclays
BCS
$83B
| $7.93M | ﹤0.01% |
295,300
+6,100
| +2% | +$147K |
|
898
PUT
Shell
SHEL
$273B
| $7.92M | ﹤0.01% |
102,100
-64,000
| -39% | -$5.52M |
|
899
PUT
UBS Group
UBS
$152B
| $7.9M | ﹤0.01% |
159,500
-83,300
| -34% | -$3.79M |
|
|
XIFR
900
CALL
XPLR Infrastructure LP
XIFR
$995M
| $7.88M | ﹤0.01% |
667,600
-260,800
| -28% | -$2.91M |
|
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.