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 |
Alphabet (Google) Class C
GOOG
|
$54.1M |
| 2 |
Apple
AAPL
|
$28.6M |
| 3 |
Meta Platforms (Facebook)
META
|
$16.5M |
| 4 |
IBM
IBM
|
$13.4M |
| 5 |
Baidu
BIDU
|
$10.3M |
Top Sells
| 1 |
SPDR S&P 500 ETF Trust
SPY
|
$9.89M |
| 2 |
McDonald's
MCD
|
$8.52M |
| 3 |
Ralph Lauren
RL
|
$5.22M |
| 4 |
Intel
INTC
|
$4.74M |
| 5 |
WBA
Walgreens Boots Alliance
WBA
|
$4.67M |
Sector Composition
| 1 | Communication Services | 22.01% |
| 2 | Technology | 15.83% |
| 3 | Healthcare | 11.95% |
| 4 | Consumer Discretionary | 9.73% |
| 5 | Financials | 7.98% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
426
Vanguard Total World Stock ETF
VT
$51.8B
| $246K | 0.02% |
+4,011
| New | +$246K |
|
427
InterDigital
IDCC
$7.43B
| $245K | 0.02% |
4,318
+2,595
| +151% | +$147K |
|
428
iShares 7-10 Year Treasury Bond ETF
IEF
$35.9B
| $245K | 0.02% |
+2,342
| New | +$245K |
|
|
BEAV
429
DELISTED
B/E Aerospace Inc
BEAV
| $245K | 0.02% |
4,464
+3,964
| +793% | +$218K |
|
|
BMS
430
DELISTED
Bemis
BMS
| $243K | 0.02% |
5,407
+4,322
| +398% | +$194K |
|
|
RLYP
431
DELISTED
RELYPSA INC COM
RLYP
| $242K | 0.02% |
7,332
+5,147
| +236% | +$170K |
|
432
Shutterstock
SSTK
$713M
| $241K | 0.02% |
4,118
+2,975
| +260% | +$174K |
|
|
CPHD
433
DELISTED
Cepheid Inc
CPHD
| $241K | 0.02% |
+3,949
| New | +$241K |
|
|
IOC
434
DELISTED
Interoil Corporation
IOC
| $240K | 0.02% |
3,994
+1,317
| +49% | +$79.1K |
|
|
LKM
435
DELISTED
Link Motion Inc.
LKM
| $237K | 0.02% |
+45,069
| New | +$237K |
|
436
Bank of New York Mellon
BK
$73.1B
| $234K | 0.02% |
5,596
-8,730
| -61% | -$365K |
|
437
Darling Ingredients
DAR
$5.07B
| $234K | 0.02% |
+15,970
| New | +$234K |
|
|
PTLA
438
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $233K | 0.02% |
5,129
-209
| -4% | -$9.49K |
|
|
AWAY
439
DELISTED
HOMEAWAY INC COM
AWAY
| $231K | 0.02% |
7,432
+6,631
| +828% | +$206K |
|
|
NLSN
440
DELISTED
Nielsen Holdings plc
NLSN
| $230K | 0.02% |
5,151
+4,560
| +772% | +$204K |
|
441
GE Aerospace
GE
$296B
| $229K | 0.02% |
1,801
-1,738
| -49% | -$221K |
|
|
NUAN
442
DELISTED
Nuance Communications, Inc.
NUAN
| $229K | 0.02% |
15,162
+14,114
| +1,347% | +$213K |
|
443
Topgolf Callaway Brands
MODG
$1.7B
| $227K | 0.02% |
+25,402
| New | +$227K |
|
|
SC
444
DELISTED
SANTANDER CONSUMER USA HOLDINGS INC
SC
| $226K | 0.02% |
+8,840
| New | +$226K |
|
445
Prudential Financial
PRU
$37.2B
| $224K | 0.02% |
2,563
-15,020
| -85% | -$1.31M |
|
|
MRO
446
DELISTED
Marathon Oil Corporation
MRO
| $224K | 0.02% |
8,466
+3,693
| +77% | +$97.7K |
|
447
Urban Outfitters
URBN
$6.35B
| $222K | 0.02% |
6,365
+1,175
| +23% | +$41K |
|
|
FRC
448
DELISTED
First Republic Bank
FRC
| $222K | 0.02% |
3,532
-9,643
| -73% | -$606K |
|
|
BOBE
449
DELISTED
Bob Evans Farms, Inc.
BOBE
| $222K | 0.02% |
4,365
-2,128
| -33% | -$108K |
|
450
LiveRamp
RAMP
$1.86B
| $219K | 0.02% |
+12,474
| New | +$219K |
|