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 | |
|---|---|---|---|---|---|---|
1326
CALL
Onto Innovation
ONTO
$14.1B
| $4.2M | ﹤0.01% |
11,100
-1,100
| -9% | -$311K |
|
1327
CALL
Equinox Gold
EQX
$13.9B
| $4.2M | ﹤0.01% |
431,600
-282,800
| -40% | -$3.65M |
|
1328
PUT
BWX Technologies
BWXT
$12.7B
| $4.18M | ﹤0.01% |
21,500
+21,000
| +4,200% | +$4.37M |
|
1329
CALL
TC Energy
TRP
$61.2B
| $4.18M | ﹤0.01% |
63,100
-70,100
| -53% | -$4.64M |
|
1330
Simon Property Group
SPG
$66.3B
| $4.18M | ﹤0.01% |
18,677
+17,809
| +2,052% | +$3.66M |
|
1331
CALL
Valaris
VAL
$5.62B
| $4.17M | ﹤0.01% |
57,500
-600
| -1% | -$55.8K |
|
1332
PUT
FuboTV Inc
FUBO
$291M
| $4.16M | ﹤0.01% |
451,800
-10,500
| -2% | -$112K |
|
1333
CALL
Brookfield
BN
$82.3B
| $4.15M | ﹤0.01% |
97,500
-171,400
| -64% | -$7.66M |
|
1334
CALL
Murphy USA
MUSA
$9.4B
| $4.15M | ﹤0.01% |
7,700
+200
| +3% | +$109K |
|
1335
CALL
Canadian Natural Resources
CNQ
$97.7B
| $4.15M | ﹤0.01% |
105,000
-143,100
| -58% | -$6.51M |
|
|
BMNR
1336
BitMine Immersion Technologies
BMNR
$16.6B
| $4.14M | ﹤0.01% |
+311,232
| New | +$6.02M |
|
1337
CALL
NexGen Energy
NXE
$6.16B
| $4.14M | ﹤0.01% |
441,100
-69,300
| -14% | -$788K |
|
|
INFQ
1338
CALL
Infleqtion Inc
INFQ
$3.27B
| $4.14M | ﹤0.01% |
310,600
+218,000
| +235% | +$3M |
|
1339
BridgeBio Pharma
BBIO
$12.8B
| $4.14M | ﹤0.01% |
55,535
+14,101
| +34% | +$988K |
|
1340
CALL
Eldorado Gold
EGO
$10.9B
| $4.13M | ﹤0.01% |
132,900
-26,300
| -17% | -$856K |
|
1341
CALL
Builders FirstSource
BLDR
$6.37B
| $4.12M | ﹤0.01% |
46,000
+25,500
| +124% | +$2.04M |
|
|
EXK
1342
CALL
Endeavour Silver
EXK
$2.78B
| $4.12M | ﹤0.01% |
497,000
-203,500
| -29% | -$1.89M |
|
1343
PUT
Coupang
CPNG
$24.9B
| $4.11M | ﹤0.01% |
236,800
-42,400
| -15% | -$765K |
|
1344
UiPath
PATH
$6.49B
| $4.11M | ﹤0.01% |
378,338
+206,033
| +120% | +$2.2M |
|
1345
PUT
CAVA Group
CAVA
$6.02B
| $4.11M | ﹤0.01% |
52,400
-8,600
| -14% | -$721K |
|
1346
PUT
Birkenstock
BIRK
$5.55B
| $4.11M | ﹤0.01% |
95,500
+89,600
| +1,519% | +$3.62M |
|
1347
CALL
Colgate-Palmolive
CL
$68.6B
| $4.11M | ﹤0.01% |
44,800
-95,900
| -68% | -$8.39M |
|
|
ETOR
1348
CALL
eToro Group
ETOR
$2.1B
| $4.1M | ﹤0.01% |
104,000
-35,600
| -26% | -$1.34M |
|
1349
Salesforce
CRM
$193B
| $4.1M | ﹤0.01% |
+26,181
| New | +$4.6M |
|
1350
PUT
Domino's
DPZ
$9.66B
| $4.09M | ﹤0.01% |
13,800
+11,800
| +590% | +$3.88M |
|
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.