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
| 1 |
Apple
AAPL
|
+$258M |
| 2 |
Vanguard S&P 500 ETF
VOO
|
+$75.7M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$67.2M |
| 4 |
Alphabet (Google) Class C
GOOG
|
+$59.4M |
| 5 |
Intel
INTC
|
+$45.8M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$56.8M |
| 2 |
iShares Silver Trust
SLV
|
+$45.9M |
| 3 |
Ford
F
|
+$32.5M |
| 4 |
Exxon Mobil
XOM
|
+$20.4M |
| 5 |
Caterpillar
CAT
|
+$19.2M |
Sector Composition
| 1 | Technology | 26.01% |
| 2 | Consumer Discretionary | 9.82% |
| 3 | Communication Services | 9.82% |
| 4 | Financials | 8.68% |
| 5 | Healthcare | 6.23% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
1226
Group 1 Automotive
GPI
$6.03B
| $80K | ﹤0.01% |
477
-1,093
| -70% | -$183K |
|
1227
Nkarta
NKTX
$140M
| $80K | ﹤0.01% |
6,561
-2,199
| -25% | -$26.8K |
|
1228
ServiceNow
NOW
$193B
| $80K | ﹤0.01% |
170
-10,560
| -98% | -$4.97M |
|
1229
Viasat
VSAT
$4.1B
| $80K | ﹤0.01% |
2,614
-2,918
| -53% | -$89.3K |
|
1230
IAMGOLD
IAG
$6.42B
| $79K | ﹤0.01% |
+49,645
| New | +$79K |
|
|
MREO
1231
Mereo BioPharma
MREO
$294M
| $79K | ﹤0.01% |
70,986
+69,977
| +6,935% | +$77.9K |
|
|
SILK
1232
DELISTED
Silk Road Medical, Inc. Common Stock
SILK
| $79K | ﹤0.01% |
2,192
+492
| +29% | +$17.7K |
|
1233
Arista Networks
ANET
$175B
| $78K | ﹤0.01% |
3,360
+1,412
| +72% | +$32.8K |
|
1234
Clean Harbors
CLH
$12.7B
| $78K | ﹤0.01% |
891
-1,088
| -55% | -$95.2K |
|
|
GMRE
1235
Global Medical REIT
GMRE
$512M
| $78K | ﹤0.01% |
+7,018
| New | +$78K |
|
1236
National CineMedia
NCMI
$455M
| $78K | ﹤0.01% |
8,571
+2,668
| +45% | +$24.3K |
|
1237
O-I Glass
OI
$1.99B
| $78K | ﹤0.01% |
+5,620
| New | +$78K |
|
1238
Sonos
SONO
$1.83B
| $78K | ﹤0.01% |
4,372
-63,108
| -94% | -$1.13M |
|
1239
Vertiv
VRT
$51.5B
| $78K | ﹤0.01% |
9,592
-2,756
| -22% | -$22.4K |
|
|
CMRX
1240
DELISTED
Chimerix, Inc.
CMRX
| $78K | ﹤0.01% |
37,594
+34,712
| +1,204% | +$72K |
|
|
KNBE
1241
DELISTED
KnowBe4, Inc. Class A Common Stock
KNBE
| $76K | ﹤0.01% |
+4,914
| New | +$76K |
|
1242
Brunswick
BC
$4.26B
| $76K | ﹤0.01% |
+1,177
| New | +$76K |
|
1243
IDEX
IEX
$12.1B
| $76K | ﹤0.01% |
420
-230
| -35% | -$41.6K |
|
1244
Precigen
PGEN
$1.13B
| $76K | ﹤0.01% |
56,778
-43,267
| -43% | -$57.9K |
|
1245
Protagonist Therapeutics
PTGX
$3.66B
| $76K | ﹤0.01% |
9,637
+4,665
| +94% | +$36.8K |
|
1246
Schwab US Large-Cap Growth ETF
SCHG
$49.5B
| $76K | ﹤0.01% |
5,256
+5,224
| +16,325% | +$75.5K |
|
1247
Procure Space ETF
UFO
$115M
| $76K | ﹤0.01% |
3,835
-1,206
| -24% | -$23.9K |
|
1248
WPP
WPP
$5.86B
| $76K | ﹤0.01% |
+1,512
| New | +$76K |
|
1249
Barnes & Noble Education
BNED
$277M
| $75K | ﹤0.01% |
257
+216
| +527% | +$63K |
|
1250
Direxion Auspice Broad Commodity Strategy ETF
COM
$177M
| $75K | ﹤0.01% |
+2,437
| New | +$75K |
|