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 | |
|---|---|---|---|---|---|---|
2376
PUT
Red Cat Holdings
RCAT
$1.02B
| $1.44M | ﹤0.01% |
134,800
+3,500
| +3% | +$40.3K |
|
2377
CALL
Banco Bradesco
BBD
$36.1B
| $1.43M | ﹤0.01% |
413,500
+15,200
| +4% | +$55.6K |
|
2378
Goodyear
GT
$1.48B
| $1.43M | ﹤0.01% |
216,855
-88,489
| -29% | -$569K |
|
2379
CALL
NewAmsterdam Pharma
NAMS
$2.7B
| $1.43M | ﹤0.01% |
42,200
-300
| -0.7% | -$9.89K |
|
2380
Sportradar
SRAD
$3.92B
| $1.43M | ﹤0.01% |
95,523
+73,374
| +331% | +$1.07M |
|
2381
Hewlett Packard
HPE
$83.6B
| $1.43M | ﹤0.01% |
+31,670
| New | +$1.14M |
|
|
HNGE
2382
Hinge Health
HNGE
$7.71B
| $1.43M | ﹤0.01% |
17,199
+14,883
| +643% | +$808K |
|
2383
CALL
Bausch Health
BHC
$2.13B
| $1.43M | ﹤0.01% |
289,300
+19,600
| +7% | +$105K |
|
|
CHYM
2384
CALL
Chime Financial
CHYM
$10.1B
| $1.43M | ﹤0.01% |
69,600
-29,100
| -29% | -$565K |
|
2385
PUT
Portland General Electric
POR
$5.51B
| $1.43M | ﹤0.01% |
27,500
+13,500
| +96% | +$684K |
|
2386
CALL
Altimmune
ALT
$595M
| $1.42M | ﹤0.01% |
468,600
+266,200
| +132% | +$795K |
|
2387
CALL
Sigma Lithium
SGML
$1.08B
| $1.42M | ﹤0.01% |
112,300
-47,700
| -30% | -$802K |
|
|
APGE
2388
CALL
DELISTED
Apogee Therapeutics
APGE
| $1.42M | ﹤0.01% |
10,700
+4,600
| +75% | +$414K |
|
2389
Precigen
PGEN
$2.77B
| $1.42M | ﹤0.01% |
249,007
+76,347
| +44% | +$330K |
|
|
LINE
2390
PUT
Lineage Inc
LINE
$8.23B
| $1.42M | ﹤0.01% |
32,800
-17,600
| -35% | -$692K |
|
2391
CALL
Nordson
NDSN
$18.1B
| $1.42M | ﹤0.01% |
+4,700
| New | +$1.33M |
|
2392
CALL
Rackspace Technology
RXT
$1.01B
| $1.42M | ﹤0.01% |
217,100
+31,800
| +17% | +$124K |
|
2393
PUT
abrdn Physical Silver Shares ETF
SIVR
$4.35B
| $1.42M | ﹤0.01% |
25,200
-48,900
| -66% | -$3.41M |
|
2394
CALL
Doximity
DOCS
$4.7B
| $1.42M | ﹤0.01% |
68,300
+19,800
| +41% | +$438K |
|
2395
Expedia Group
EXPE
$31.7B
| $1.41M | ﹤0.01% |
+5,521
| New | +$1.31M |
|
2396
PUT
Rexford Industrial Realty
REXR
$8.36B
| $1.41M | ﹤0.01% |
42,100
+41,200
| +4,578% | +$1.44M |
|
|
XXI
2397
CALL
Twenty One Capital Inc
XXI
$2.3B
| $1.41M | ﹤0.01% |
284,900
-700
| -0.2% | -$4.91K |
|
2398
Global X NASDAQ-100 Covered Call ETF
QYLD
$8.46B
| $1.41M | ﹤0.01% |
+76,237
| New | +$1.37M |
|
2399
CALL
Smith & Wesson
SWBI
$639M
| $1.4M | ﹤0.01% |
93,300
-35,100
| -27% | -$527K |
|
2400
PUT
Beyond Meat
BYND
$144M
| $1.4M | ﹤0.01% |
62,340
-4,693
| -7% | -$109K |
|
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.