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 | |
|---|---|---|---|---|---|---|
326
PUT
McDonald's
MCD
$167B
| $33.6M | 0.02% |
124,400
-46,900
| -27% | -$13.4M |
|
327
PUT
Datadog
DDOG
$96.3B
| $33.5M | 0.02% |
128,600
+52,100
| +68% | +$9.69M |
|
328
PUT
Rigetti Computing
RGTI
$5.56B
| $33.5M | 0.02% |
1,732,900
+1,087,100
| +168% | +$21M |
|
329
CALL
Teucrium Corn Fund
CORN
$150M
| $33.5M | 0.02% |
1,853,200
+1,041,800
| +128% | +$18.6M |
|
330
PUT
Shopify
SHOP
$183B
| $33.4M | 0.02% |
292,400
-188,500
| -39% | -$21.5M |
|
|
XYZ
331
CALL
Block Inc
XYZ
$45.9B
| $33.3M | 0.02% |
437,500
-26,500
| -6% | -$1.86M |
|
332
CALL
IonQ
IONQ
$18.4B
| $33.1M | 0.02% |
621,900
+18,100
| +3% | +$917K |
|
|
SCHW
333
CALL
Charles Schwab
SCHW
$171B
| $33.1M | 0.02% |
358,800
+106,500
| +42% | +$9.71M |
|
334
PUT
Altria Group
MO
$115B
| $33.1M | 0.02% |
459,600
+111,300
| +32% | +$7.77M |
|
|
METD
335
CALL
Direxion Daily META Bear 1X ETF
METD
$5.27M
| $33M | 0.02% |
345,100
+165,600
| +92% | +$2.72M |
|
336
CALL
Moderna
MRNA
$79.4B
| $32.6M | 0.02% |
466,200
-203,800
| -30% | -$10.5M |
|
337
ASML
ASML
$670B
| $32.6M | 0.02% |
16,406
-335
| -2% | -$533K |
|
338
CALL
Roblox
RBLX
$33.2B
| $32.6M | 0.02% |
599,500
+182,500
| +44% | +$9.08M |
|
339
PUT
Pinduoduo
PDD
$110B
| $32.4M | 0.02% |
425,200
-173,100
| -29% | -$16M |
|
340
PUT
Philip Morris
PM
$297B
| $32.3M | 0.02% |
178,400
+9,500
| +6% | +$1.65M |
|
341
CALL
POET Technologies
POET
$1.34B
| $32M | 0.02% |
3,112,000
+1,575,000
| +102% | +$17.1M |
|
342
CALL
RTX Corp
RTX
$255B
| $31.8M | 0.02% |
167,700
+22,200
| +15% | +$4.07M |
|
343
Broadcom
AVGO
$1.68T
| $31.7M | 0.02% |
84,040
+40,796
| +94% | +$16.4M |
|
344
CALL
United States Brent Oil Fund
BNO
$740M
| $31.3M | 0.02% |
770,300
+721,200
| +1,469% | +$36.8M |
|
345
PUT
D-Wave Quantum Inc
QBTS
$6.61B
| $31.3M | 0.02% |
1,305,100
+84,100
| +7% | +$1.84M |
|
346
CALL
AbbVie
ABBV
$467B
| $31.3M | 0.02% |
124,400
+4,400
| +4% | +$947K |
|
|
CRCL
347
PUT
Circle Internet Group
CRCL
$22.6B
| $31.3M | 0.02% |
499,800
-206,000
| -29% | -$20M |
|
348
CALL
ConocoPhillips
COP
$153B
| $30.9M | 0.02% |
296,800
-11,700
| -4% | -$1.39M |
|
349
PUT
Constellation Energy
CEG
$93.3B
| $30.8M | 0.02% |
124,000
+9,300
| +8% | +$2.62M |
|
350
PUT
Wolfspeed
WOLF
$1.46B
| $30.8M | 0.02% |
638,100
-35,900
| -5% | -$1.56M |
|
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.