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 | |
|---|---|---|---|---|---|---|
1376
PUT
Thomson Reuters
TRI
$42.9B
| $3.91M | ﹤0.01% |
47,900
+29,686
| +163% | +$2.59M |
|
1377
Citigroup
C
$225B
| $3.91M | ﹤0.01% |
27,929
+5,604
| +25% | +$730K |
|
1378
CALL
CenterPoint Energy
CNP
$24.3B
| $3.91M | ﹤0.01% |
88,700
-12,000
| -12% | -$514K |
|
1379
CALL
AllianceBernstein
AB
$3.33B
| $3.91M | ﹤0.01% |
110,900
-8,400
| -7% | -$318K |
|
1380
PUT
Waste Management
WM
$82.7B
| $3.9M | ﹤0.01% |
17,500
+10,700
| +157% | +$2.38M |
|
1381
PUT
Invitation Homes
INVH
$15.7B
| $3.9M | ﹤0.01% |
129,100
+33,000
| +34% | +$933K |
|
1382
First Majestic Silver
AG
$9.37B
| $3.9M | ﹤0.01% |
229,853
+8,408
| +4% | +$167K |
|
1383
PUT
PureCycle Technologies
PCT
$1.01B
| $3.9M | ﹤0.01% |
480,400
+79,300
| +20% | +$711K |
|
1384
CALL
Xometry
XMTR
$5.77B
| $3.89M | ﹤0.01% |
40,300
+38,400
| +2,021% | +$2.74M |
|
1385
PUT
Viking Holdings
VIK
$35.9B
| $3.87M | ﹤0.01% |
37,000
-14,900
| -29% | -$1.29M |
|
1386
CALL
Deckers Outdoor
DECK
$10.7B
| $3.87M | ﹤0.01% |
39,000
+13,100
| +51% | +$1.38M |
|
1387
CALL
Sharplink Inc
SBET
$2.09B
| $3.86M | ﹤0.01% |
804,200
+173,900
| +28% | +$1.11M |
|
1388
DigitalOcean
DOCN
$16.4B
| $3.86M | ﹤0.01% |
24,552
-12,045
| -33% | -$1.63M |
|
1389
CALL
Proshares UltraShort Technology
REW
$4.14M
| $3.85M | ﹤0.01% |
417,800
+104,150
| +33% | +$1.61M |
|
1390
PUT
DraftKings
DKNG
$10.9B
| $3.85M | ﹤0.01% |
152,400
-110,800
| -42% | -$2.73M |
|
|
Q
1391
PUT
Qnity Electronics Inc
Q
$26.1B
| $3.84M | ﹤0.01% |
23,500
+13,600
| +137% | +$2M |
|
1392
ExxonMobil
XOM
$660B
| $3.84M | ﹤0.01% |
+28,063
| New | +$4.2M |
|
1393
CALL
Vicor
VICR
$13B
| $3.84M | ﹤0.01% |
10,100
+1,100
| +12% | +$300K |
|
1394
CALL
Paychex
PAYX
$36.1B
| $3.83M | ﹤0.01% |
39,000
-21,500
| -36% | -$2.03M |
|
1395
TeraWulf
WULF
$7.85B
| $3.83M | ﹤0.01% |
155,128
-152,889
| -50% | -$3.52M |
|
|
DENT
1396
CALL
DELISTED
AdvisorShares Dent Tactical ETF
DENT
| $3.83M | ﹤0.01% |
791,200
+169,900
| +27% | +$823K |
|
1397
ESCO Technologies
ESE
$6.95B
| $3.83M | ﹤0.01% |
10,944
+7,377
| +207% | +$2.31M |
|
1398
PUT
Replimune Group
REPL
$1.16B
| $3.83M | ﹤0.01% |
346,000
+255,300
| +281% | +$1.56M |
|
1399
PUT
F5
FFIV
$25.1B
| $3.83M | ﹤0.01% |
9,200
+3,300
| +56% | +$1.17M |
|
1400
Pan American Silver
PAAS
$19.9B
| $3.82M | ﹤0.01% |
85,284
-4,430
| -5% | -$237K |
|
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.