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 | |
|---|---|---|---|---|---|---|
2401
Nutrien
NTR
$34.5B
| $1.4M | ﹤0.01% |
+22,267
| New | +$1.56M |
|
2402
PUT
Canadian Solar
CSIQ
$733M
| $1.4M | ﹤0.01% |
87,400
-74,200
| -46% | -$1.19M |
|
2403
CALL
First Horizon
FHN
$11.1B
| $1.4M | ﹤0.01% |
54,600
-533,400
| -91% | -$13M |
|
|
MIAX
2404
PUT
Miami International Holdings
MIAX
$3.46B
| $1.4M | ﹤0.01% |
37,600
-6,200
| -14% | -$277K |
|
2405
Teladoc Health
TDOC
$1.11B
| $1.4M | ﹤0.01% |
164,718
-168,093
| -51% | -$1.12M |
|
2406
PUT
Paychex
PAYX
$36.1B
| $1.4M | ﹤0.01% |
14,200
-22,000
| -61% | -$2.08M |
|
|
NMAX
2407
PUT
Newsmax Inc
NMAX
$1.4B
| $1.4M | ﹤0.01% |
168,500
+143,300
| +569% | +$1.03M |
|
2408
PUT
FS KKR Capital
FSK
$3.11B
| $1.39M | ﹤0.01% |
132,800
+27,100
| +26% | +$291K |
|
2409
PUT
Coca-Cola Consolidated
COKE
$12.7B
| $1.39M | ﹤0.01% |
7,300
+5,500
| +306% | +$1.02M |
|
2410
Hilton Worldwide
HLT
$70.7B
| $1.39M | ﹤0.01% |
4,202
+808
| +24% | +$266K |
|
2411
PUT
Blackstone Mortgage Trust
BXMT
$2.11B
| $1.39M | ﹤0.01% |
81,900
+35,200
| +75% | +$657K |
|
2412
Aptiv
APTV
$9.3B
| $1.39M | ﹤0.01% |
22,600
+11,781
| +109% | +$721K |
|
2413
Millicom
TIGO
$15.5B
| $1.38M | ﹤0.01% |
+15,260
| New | +$1.29M |
|
2414
PUT
Fidelity Wise Origin Bitcoin Fund
FBTC
$15.6B
| $1.38M | ﹤0.01% |
27,100
-1,600
| -6% | -$100K |
|
2415
McKesson
MCK
$101B
| $1.38M | ﹤0.01% |
+1,827
| New | +$1.45M |
|
2416
Corvus Pharmaceuticals
CRVS
$977M
| $1.38M | ﹤0.01% |
92,343
+57,620
| +166% | +$800K |
|
2417
CALL
Brown-Forman Class B
BF.B
$12B
| $1.38M | ﹤0.01% |
51,700
-2,200
| -4% | -$59.3K |
|
2418
Noble Corp
NE
$6.84B
| $1.38M | ﹤0.01% |
36,979
-12,518
| -25% | -$598K |
|
2419
CALL
First Trust Consumer Discretionary AlphaDEX Fund
FXD
$248M
| $1.38M | ﹤0.01% |
13,600
+2,200
| +19% | +$148K |
|
2420
PUT
Organon & Co
OGN
$3.61B
| $1.38M | ﹤0.01% |
101,800
+16,000
| +19% | +$191K |
|
2421
MaxLinear
MXL
$8.51B
| $1.38M | ﹤0.01% |
+10,764
| New | +$761K |
|
2422
CALL
Yeti Holdings
YETI
$3.09B
| $1.38M | ﹤0.01% |
27,800
+22,100
| +388% | +$958K |
|
2423
PUT
AbCellera Biologics
ABCL
$4.12B
| $1.38M | ﹤0.01% |
175,500
-20,600
| -11% | -$101K |
|
2424
CALL
Northrop Grumman
NOC
$72.5B
| $1.38M | ﹤0.01% |
2,700
-700
| -21% | -$404K |
|
2425
CALL
PTC
PTC
$15B
| $1.37M | ﹤0.01% |
+12,100
| New | +$1.63M |
|
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.