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 |
LNKD
LinkedIn Corporation
LNKD
|
+$29.3M |
| 2 |
SPDR Gold Trust
GLD
|
+$18.1M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$14.9M |
| 4 |
Biogen
BIIB
|
+$13.7M |
| 5 |
Visa
V
|
+$13.3M |
Top Sells
| 1 |
Broadcom
AVGO
|
+$37.4M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$13.9M |
| 5 |
SPDR S&P MidCap 400 ETF Trust
MDY
|
+$12.9M |
Sector Composition
| 1 | Communication Services | 12.51% |
| 2 | Healthcare | 12.38% |
| 3 | Technology | 12.22% |
| 4 | Consumer Discretionary | 8.59% |
| 5 | Financials | 8.53% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Shares Change % | Capital Flow | |
|---|---|---|---|---|---|---|
351
Brookdale Senior Living
BKD
$1.81B
| $397K | 0.03% |
25,764
+10,870
| +73% | +$167K |
|
|
IPHI
352
DELISTED
INPHI CORPORATION
IPHI
| $397K | 0.03% |
+12,413
| New | +$397K |
|
353
Coca-Cola Europacific Partners
CCEP
$41.6B
| $396K | 0.03% |
11,117
+5,711
| +106% | +$203K |
|
|
DISH
354
DELISTED
DISH Network Corp.
DISH
| $396K | 0.03% |
7,575
+4,013
| +113% | +$210K |
|
355
Dillards
DDS
$8.87B
| $393K | 0.03% |
6,493
+1,788
| +38% | +$108K |
|
356
Direxion Daily MSCI Brazil Bull 2X Shares
BRZU
$132M
| $392K | 0.03% |
+427
| New | +$392K |
|
357
Ciena
CIEN
$17.3B
| $391K | 0.03% |
20,890
-2,436
| -10% | -$45.6K |
|
|
HA
358
DELISTED
Hawaiian Holdings, Inc.
HA
| $390K | 0.03% |
10,298
-11,655
| -53% | -$441K |
|
|
PVG
359
DELISTED
PRETIUM RESOURCES INC.
PVG
| $389K | 0.03% |
34,792
+5,536
| +19% | +$61.9K |
|
360
Williams-Sonoma
WSM
$24.7B
| $387K | 0.03% |
14,850
+8,002
| +117% | +$209K |
|
361
Banco Santander
SAN
$145B
| $386K | 0.03% |
102,865
+91,313
| +790% | +$343K |
|
|
OUTR
362
DELISTED
OUTERWALL INC
OUTR
| $384K | 0.03% |
9,156
-21,849
| -70% | -$916K |
|
|
INVN
363
DELISTED
Invensense Inc
INVN
| $383K | 0.03% |
62,593
+26,908
| +75% | +$165K |
|
364
iShares Russell 1000 Value ETF
IWD
$63.5B
| $382K | 0.03% |
+3,710
| New | +$382K |
|
365
Lam Research
LRCX
$134B
| $382K | 0.03% |
+45,510
| New | +$382K |
|
366
ProShares VIX Short-Term Futures ETF
VIXY
$83.3M
| $381K | 0.03% |
+26
| New | +$381K |
|
367
3D Systems Corporation
DDD
$269M
| $380K | 0.03% |
27,804
+24,061
| +643% | +$329K |
|
|
KRA
368
DELISTED
Kraton Corporation
KRA
| $380K | 0.03% |
+13,613
| New | +$380K |
|
369
Ally Financial
ALLY
$12.7B
| $376K | 0.03% |
+22,055
| New | +$376K |
|
370
Progressive
PGR
$143B
| $376K | 0.03% |
+11,229
| New | +$376K |
|
371
W.W. Grainger
GWW
$47.6B
| $372K | 0.02% |
+1,638
| New | +$372K |
|
372
Manhattan Associates
MANH
$13B
| $371K | 0.02% |
+5,797
| New | +$371K |
|
373
ProShares Ultra Silver
AGQ
$889M
| $364K | 0.02% |
7,651
+1,566
| +26% | +$74.5K |
|
374
iShares MSCI South Korea ETF
EWY
$5.32B
| $364K | 0.02% |
+7,009
| New | +$364K |
|
375
Kilroy Realty
KRC
$4.97B
| $364K | 0.02% |
5,501
+5,318
| +2,906% | +$352K |
|