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
| Rank | Stock | Value |
|---|---|---|
| 1 |
Gilead Sciences
GILD
|
+$17.3M |
| 2 |
Apple
AAPL
|
+$15.2M |
| 3 |
Alphabet (Google) Class A
GOOGL
|
+$14.9M |
| 4 |
Booking.com
BKNG
|
+$14.7M |
| 5 |
Wells Fargo
WFC
|
+$12.9M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
SPDR Gold Trust
GLD
|
+$38.3M |
| 2 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$30.7M |
| 3 |
LNKD
LinkedIn Corporation
LNKD
|
+$15.2M |
| 4 |
CELG
Celgene Corp
CELG
|
+$12.6M |
| 5 |
ProShares Trust UltraShort Lehman 20+ Year Treasury
TBT
|
+$10.4M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.39% |
| 2 | Healthcare | 8.28% |
| 3 | Consumer Discretionary | 6.84% |
| 4 | Technology | 6.06% |
| 5 | Financials | 4.39% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
|
KERX
1226
DELISTED
Keryx Biopharmaceuticals Inc
KERX
| $153K | 0.01% |
28,898
+8,344
| +41% | +$45K |
|
1227
Direxion Daily Energy Bear 2X ETF
ERY
$37.7M
| $152K | 0.01% |
+247
| New | +$177K |
|
1228
CALL
The Greenbrier Companies
GBX
$1.59B
| $152K | 0.01% |
617
-330
| -35% | -$10.8K |
|
1229
Jefferies Financial Group
JEF
$12.8B
| $152K | 0.01% |
8,925
+3,857
| +76% | +$63.9K |
|
1230
CALL
Lumentum
LITE
$64.9B
| $152K | 0.01% |
321
+183
| +133% | +$6.02K |
|
1231
MBIA
MBI
$293M
| $152K | 0.01% |
19,526
+13,185
| +208% | +$104K |
|
1232
Protolabs
PRLB
$1.87B
| $152K | 0.01% |
+2,543
| New | +$146K |
|
|
CYOU
1233
DELISTED
Changyou.com Limited American Depositary Share
CYOU
| $152K | 0.01% |
+5,584
| New | +$129K |
|
1234
PUT
Dick's Sporting Goods
DKS
$18.3B
| $151K | 0.01% |
887
+856
| +2,761% | +$47.1K |
|
1235
Genesco
GCO
$388M
| $151K | 0.01% |
2,780
+2,691
| +3,024% | +$170K |
|
1236
PUT
General Motors
GM
$73B
| $151K | 0.01% |
1,165
-499
| -30% | -$15.6K |
|
1237
MakeMyTrip
MMYT
$4.67B
| $151K | 0.01% |
+6,431
| New | +$122K |
|
|
SRCL
1238
PUT
DELISTED
Stericycle Inc
SRCL
| $151K | 0.01% |
256
+177
| +224% | +$16K |
|
1239
PUT
Anavex Life Sciences
AVXL
$230M
| $150K | 0.01% |
447
-12
| -3% | -$51 |
|
1240
PUT
Elevance Health
ELV
$82.3B
| $150K | 0.01% |
1,012
+509
| +101% | +$65.7K |
|
1241
PUT
Ulta Beauty
ULTA
$20.5B
| $150K | 0.01% |
503
+153
| +44% | +$38.7K |
|
1242
PUT
Yelp
YELP
$1.35B
| $150K | 0.01% |
542
+351
| +184% | +$12.3K |
|
|
KCG
1243
CALL
DELISTED
KCG Holdings, Inc.
KCG
| $150K | 0.01% |
383
+6
| +2% | +$87 |
|
1244
PUT
Agios Pharmaceuticals
AGIO
$2.16B
| $149K | 0.01% |
700
+609
| +669% | +$26.5K |
|
1245
PUT
Jazz Pharmaceuticals
JAZZ
$16B
| $149K | 0.01% |
71
+23
| +48% | +$3.1K |
|
|
KW
1246
DELISTED
Kennedy-Wilson Holdings
KW
| $149K | 0.01% |
6,632
+6,329
| +2,089% | +$135K |
|
1247
CALL
L3Harris
LHX
$55.8B
| $149K | 0.01% |
490
+282
| +136% | +$25.1K |
|
1248
CALL
Energous
WATT
$83.1M
| – | – |
0
| – | – |
|
1249
YPF
YPF
$20.4B
| $149K | 0.01% |
8,186
-16,570
| -67% | -$300K |
|
|
TERP
1250
PUT
DELISTED
TerraForm Power, Inc
TERP
| $149K | 0.01% |
828
-295
| -26% | -$3.69K |
|
Similar funds
Simplex Trading's Q3 2016 Portfolio in Review
As of Q3 2016, Simplex Trading held 7,235 positions worth $1.48B, down 1.4% from $1.5B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading withdrew a net $87.1M in Q3 2016, closing 1,479 positions and reducing 1,939 holdings. Its most notable exit was SPDR Gold Trust, an estimated $38.3M position sold in full.
By sector, the portfolio is most concentrated in Communication Services at 8.4% of assets, up from 6.6% a quarter earlier, followed by Healthcare and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Booking.com worth $15.6M.
- Simplex Trading's largest Q3 2016 buy was Booking.com: 264,225 shares worth $15.6M.
- Simplex Trading added most to Gilead Sciences in Q3 2016, an estimated $17.3M increase.
- Simplex Trading's biggest Q3 2016 reduction was LinkedIn Corporation, cutting an estimated $15.2M.
- Simplex Trading fully exited SPDR Gold Trust in Q3 2016, selling an estimated $38.3M.
- Simplex Trading's ten largest holdings make up 18% of its $1.48B portfolio in Q3 2016.
- Simplex Trading opened 1,460 new positions and closed 1,479 in Q3 2016.
- Simplex Trading's portfolio value fell 1.4% quarter-over-quarter to $1.48B.
Based on Simplex Trading's 13F filing for Q3 2016, filed 7 Oct 2016.