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 | |
|---|---|---|---|---|---|---|
926
PUT
Ouster
OUST
$3.15B
| $7.56M | ﹤0.01% |
120,900
+58,300
| +93% | +$1.96M |
|
|
USAR
927
CALL
USA Rare Earth Inc
USAR
$5.7B
| $7.55M | ﹤0.01% |
349,800
-189,300
| -35% | -$4.32M |
|
928
CALL
NetApp
NTAP
$39.5B
| $7.51M | ﹤0.01% |
48,500
+18,000
| +59% | +$2.35M |
|
929
CALL
BioCryst Pharmaceuticals
BCRX
$2.2B
| $7.5M | ﹤0.01% |
750,200
+509,300
| +211% | +$4.61M |
|
930
CALL
Nutrien
NTR
$34.5B
| $7.49M | ﹤0.01% |
119,000
+10,600
| +10% | +$741K |
|
931
PUT
Powell Industries
POWL
$6.91B
| $7.47M | ﹤0.01% |
26,100
+21,000
| +412% | +$5.7M |
|
932
PUT
Five Below
FIVE
$12.3B
| $7.46M | ﹤0.01% |
41,500
+2,200
| +6% | +$474K |
|
|
GLXY
933
PUT
Galaxy Digital Inc
GLXY
$4.71B
| $7.45M | ﹤0.01% |
272,600
-41,600
| -13% | -$1.16M |
|
934
PUT
Twilio
TWLO
$42.4B
| $7.45M | ﹤0.01% |
36,100
+9,700
| +37% | +$1.72M |
|
935
CALL
GitLab
GTLB
$7.8B
| $7.44M | ﹤0.01% |
243,600
+57,100
| +31% | +$1.45M |
|
936
CALL
VF Corp
VFC
$5.56B
| $7.43M | ﹤0.01% |
445,600
+12,400
| +3% | +$222K |
|
937
CALL
Invesco DB US Dollar Index Bullish Fund
UUP
$398M
| $7.43M | ﹤0.01% |
286,200
+97,400
| +52% | +$2.7M |
|
938
CALL
BorgWarner
BWA
$12.5B
| $7.41M | ﹤0.01% |
111,600
+83,100
| +292% | +$5.26M |
|
|
FIGR
939
CALL
Figure Technology Solutions
FIGR
$7.16B
| $7.4M | ﹤0.01% |
240,900
+30,700
| +15% | +$1.03M |
|
940
PUT
YPF Sociedad Anonima ADS
YPF
$20.4B
| $7.4M | ﹤0.01% |
162,700
+22,700
| +16% | +$1.06M |
|
941
CALL
Cenovus Energy
CVE
$57B
| $7.39M | ﹤0.01% |
298,000
-58,700
| -16% | -$1.62M |
|
942
PUT
S&P Global
SPGI
$119B
| $7.37M | ﹤0.01% |
18,100
+2,200
| +14% | +$929K |
|
|
PPLT
943
CALL
abrdn Physical Platinum Shares ETF
PPLT
$2.17B
| $7.36M | ﹤0.01% |
520,700
-171,300
| -25% | -$2.98M |
|
944
CALL
Brown & Brown
BRO
$20.4B
| $7.35M | ﹤0.01% |
114,600
-5,500
| -5% | -$336K |
|
945
CALL
Archer Aviation
ACHR
$4.32B
| $7.35M | ﹤0.01% |
1,553,200
+235,600
| +18% | +$1.37M |
|
|
ZVOL
946
CALL
Volatility Premium Plus ETF
ZVOL
$17.4M
| $7.34M | ﹤0.01% |
719,200
-544,800
| -43% | -$4.59M |
|
947
PUT
Calumet Specialty Products
CLMT
$4.72B
| $7.32M | ﹤0.01% |
203,100
+156,700
| +338% | +$5.27M |
|
948
CALL
FirstEnergy
FE
$25.1B
| $7.31M | ﹤0.01% |
153,700
+32,100
| +26% | +$1.52M |
|
949
Western Digital
WDC
$165B
| $7.3M | ﹤0.01% |
11,430
+5,645
| +98% | +$2.74M |
|
950
CALL
Invesco CurrencyShares Japanese Yen Trust
FXY
$475M
| $7.3M | ﹤0.01% |
129,300
-13,800
| -10% | -$795K |
|
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.