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 |
Amazon
AMZN
|
+$84.3M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37M |
| 3 |
Amgen
AMGN
|
+$32.3M |
| 4 |
Micron Technology
MU
|
+$29.4M |
| 5 |
Qualcomm
QCOM
|
+$18M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
+$29.8M |
| 2 |
Gilead Sciences
GILD
|
+$29.3M |
| 3 |
Goldman Sachs
GS
|
+$27.7M |
| 4 |
Booking.com
BKNG
|
+$26M |
| 5 |
AT&T
T
|
+$20.8M |
Sector Composition
| 1 | Technology | 20.65% |
| 2 | Communication Services | 17.64% |
| 3 | Consumer Discretionary | 14.77% |
| 4 | Healthcare | 11.1% |
| 5 | Financials | 6.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
Star Bulk Carriers
SBLK
$2.25B
| $415K | 0.02% |
+42,264
| New | +$415K |
|
427
Bread Financial
BFH
$3B
| $413K | 0.02% |
+2,016
| New | +$413K |
|
428
MarketAxess Holdings
MKTX
$7.03B
| $411K | 0.02% |
+2,047
| New | +$411K |
|
429
Franklin Covey
FC
$238M
| $410K | 0.02% |
21,261
+18,877
| +792% | +$364K |
|
|
NYRT
430
DELISTED
New York REIT, Inc.
NYRT
| $406K | 0.02% |
4,705
+4,422
| +1,563% | +$382K |
|
431
Aecom
ACM
$16.5B
| $406K | 0.02% |
+12,572
| New | +$406K |
|
432
Carriage Services
CSV
$669M
| $405K | 0.02% |
15,053
-8,125
| -35% | -$219K |
|
433
McKesson
MCK
$87.8B
| $402K | 0.02% |
2,448
+17
| +0.7% | +$2.79K |
|
434
ProShares UltraShort S&P500
SDS
$438M
| $401K | 0.02% |
+1,583
| New | +$401K |
|
435
Teck Resources
TECK
$19.1B
| $401K | 0.02% |
23,194
-4,525
| -16% | -$78.2K |
|
436
Invesco Senior Loan ETF
BKLN
$6.88B
| $400K | 0.02% |
17,315
-12,685
| -42% | -$293K |
|
|
SPA
437
DELISTED
Sparton
SPA
| $400K | 0.02% |
18,193
-10,689
| -37% | -$235K |
|
438
Rithm Capital
RITM
$6.64B
| $399K | 0.02% |
25,682
+23,246
| +954% | +$361K |
|
439
MPLX
MPLX
$51B
| $398K | 0.02% |
+11,940
| New | +$398K |
|
|
FLIR
440
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
| $398K | 0.02% |
+11,507
| New | +$398K |
|
441
DexCom
DXCM
$30.7B
| $397K | 0.02% |
21,740
+3,616
| +20% | +$66K |
|
|
AGU
442
DELISTED
Agrium
AGU
| $397K | 0.02% |
4,388
+1,758
| +67% | +$159K |
|
443
MKS Inc. Common Stock
MKSI
$7.27B
| $394K | 0.02% |
+5,868
| New | +$394K |
|
444
Carlisle Companies
CSL
$16.3B
| $393K | 0.02% |
+4,120
| New | +$393K |
|
445
Ethan Allen Interiors
ETD
$747M
| $392K | 0.02% |
12,154
+11,422
| +1,560% | +$368K |
|
|
HDS
446
DELISTED
HD Supply Holdings, Inc.
HDS
| $392K | 0.02% |
12,811
+4,678
| +58% | +$143K |
|
447
Open Text
OTEX
$8.7B
| $391K | 0.02% |
12,420
+5,413
| +77% | +$170K |
|
448
Evercore
EVR
$12.6B
| $390K | 0.02% |
+5,537
| New | +$390K |
|
449
Vanguard Small-Cap ETF
VB
$66.8B
| $389K | 0.02% |
2,871
-5,324
| -65% | -$721K |
|
|
ITCI
450
DELISTED
Intra-Cellular Therapies Inc.
ITCI
| $387K | 0.02% |
31,214
+31,060
| +20,169% | +$385K |
|