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 | |
|---|---|---|---|---|---|---|
251
Guidewire Software
GWRE
$22B
| $628K | 0.04% |
+10,180
| New | +$628K |
|
252
Yelp
YELP
$2.02B
| $623K | 0.04% |
20,529
+10,108
| +97% | +$307K |
|
253
KB Home
KBH
$4.63B
| $620K | 0.04% |
40,767
+39,177
| +2,464% | +$596K |
|
|
SWIR
254
DELISTED
Sierra Wireless
SWIR
| $619K | 0.04% |
36,515
-3,933
| -10% | -$66.7K |
|
255
Capital One
COF
$142B
| $616K | 0.04% |
+9,704
| New | +$616K |
|
256
Teleflex
TFX
$5.78B
| $612K | 0.04% |
+3,455
| New | +$612K |
|
|
MFLX
257
DELISTED
MULTI-FINELINE ELECTRONIX INC
MFLX
| $610K | 0.04% |
26,318
+24,672
| +1,499% | +$572K |
|
258
ProShares UltraShort Euro
EUO
$33.7M
| $606K | 0.04% |
24,935
+13,596
| +120% | +$330K |
|
259
Direxion Daily Emerging Markets Bull 3X Shares
EDC
$86.4M
| $605K | 0.04% |
+11,749
| New | +$605K |
|
|
APU
260
DELISTED
AmeriGas Partners, L.P.
APU
| $601K | 0.04% |
+12,880
| New | +$601K |
|
261
Polaris
PII
$3.33B
| $590K | 0.04% |
7,223
+4,881
| +208% | +$399K |
|
262
Gentex
GNTX
$6.25B
| $585K | 0.04% |
+37,873
| New | +$585K |
|
263
Iovance Biotherapeutics
IOVA
$901M
| $585K | 0.04% |
+72,340
| New | +$585K |
|
264
Skyworks Solutions
SWKS
$11.2B
| $579K | 0.04% |
+9,150
| New | +$579K |
|
265
Electronic Arts
EA
$42.2B
| $577K | 0.04% |
+7,618
| New | +$577K |
|
266
PVH
PVH
$4.22B
| $569K | 0.04% |
+6,041
| New | +$569K |
|
267
BlackBerry
BB
$2.31B
| $561K | 0.04% |
83,617
+65,623
| +365% | +$440K |
|
268
Ford
F
$46.7B
| $559K | 0.04% |
+44,503
| New | +$559K |
|
|
WNR
269
DELISTED
Western Refining Inc
WNR
| $555K | 0.04% |
26,927
+15,691
| +140% | +$323K |
|
270
Hewlett Packard
HPE
$31B
| $554K | 0.04% |
52,214
+38,450
| +279% | +$408K |
|
271
Shopify
SHOP
$191B
| $554K | 0.04% |
180,300
+35,870
| +25% | +$110K |
|
|
INSY
272
DELISTED
Insys Therapeutics, Inc.
INSY
| $554K | 0.04% |
42,884
+40,960
| +2,129% | +$529K |
|
273
ProShares UltraShort Silver
ZSL
$20M
| $551K | 0.04% |
1,089
-481
| -31% | -$243K |
|
|
IMS
274
DELISTED
IMS HEALTH HLDGS INC COM STK (DE)
IMS
| $550K | 0.04% |
+21,715
| New | +$550K |
|
275
Ares Capital
ARCC
$15.8B
| $548K | 0.04% |
38,641
+35,054
| +977% | +$497K |
|