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 | |
|---|---|---|---|---|---|---|
1851
PUT
Builders FirstSource
BLDR
$7.84B
| $67K | ﹤0.01% |
+298
| New | +$3.75K |
|
1852
CALL
Cognizant
CTSH
$21.5B
| $67K | ﹤0.01% |
883
+448
| +103% | +$25.5K |
|
1853
CALL
Dell
DELL
$283B
| $67K | ﹤0.01% |
+3,328
| New | +$45.2K |
|
1854
Dynagas LNG Partners
DLNG
$131M
| $67K | ﹤0.01% |
4,362
+1,300
| +42% | +$19K |
|
|
HEES
1855
DELISTED
H&E Equipment Services
HEES
| $67K | ﹤0.01% |
+4,054
| New | +$69.6K |
|
1856
CALL
Immersion
IMMR
$216M
| $67K | ﹤0.01% |
564
+441
| +359% | +$3.27K |
|
1857
CALL
Liberty Latin America Class C
LILAK
$1.5B
| $67K | ﹤0.01% |
553
+175
| +46% | +$4.68K |
|
1858
CALL
Marvell Technology
MRVL
$174B
| $67K | ﹤0.01% |
615
-503
| -45% | -$5.91K |
|
1859
Pacira BioSciences
PCRX
$1.02B
| $67K | ﹤0.01% |
1,959
-6,697
| -77% | -$262K |
|
1860
Papa John's
PZZA
$999M
| $67K | ﹤0.01% |
+861
| New | +$64.2K |
|
1861
PUT
Royal Gold
RGLD
$17.1B
| $67K | ﹤0.01% |
389
+100
| +35% | +$8.03K |
|
1862
CALL
Tower Semiconductor
TSEM
$26.4B
| $67K | ﹤0.01% |
441
+81
| +23% | +$1.17K |
|
1863
PUT
Vipshop
VIPS
$6.84B
| $67K | ﹤0.01% |
487
+374
| +331% | +$5.26K |
|
1864
CALL
VeriSign
VRSN
$25.3B
| $67K | ﹤0.01% |
317
+263
| +487% | +$21.1K |
|
|
AVP
1865
PUT
DELISTED
Avon Products, Inc.
AVP
| $67K | ﹤0.01% |
844
+1
| +0.1% | +$5 |
|
|
BPL
1866
CALL
DELISTED
Buckeye Partners, L.P.
BPL
| $67K | ﹤0.01% |
506
-206
| -29% | -$14.7K |
|
|
TOWR
1867
DELISTED
Tower International, Inc.
TOWR
| $67K | ﹤0.01% |
+2,791
| New | +$64K |
|
1868
AeroVironment
AVAV
$7.57B
| $66K | ﹤0.01% |
+2,729
| New | +$73.4K |
|
1869
PUT
Clean Energy Fuels
CLNE
$447M
| $66K | ﹤0.01% |
652
-3
| -0.5% | -$11 |
|
|
DBVT
1870
DBV Technologies
DBVT
$807M
| $66K | ﹤0.01% |
183
+74
| +68% | +$25.7K |
|
1871
CALL
Genesis Energy
GEL
$1.84B
| $66K | ﹤0.01% |
443
+173
| +64% | +$6.34K |
|
1872
CALL
Hain Celestial
HAIN
$47.8M
| $66K | ﹤0.01% |
763
+680
| +819% | +$29.8K |
|
1873
Hudbay
HBM
$9.92B
| $66K | ﹤0.01% |
16,681
+5,296
| +47% | +$23.9K |
|
1874
CALL
TE Connectivity
TEL
$58.8B
| $66K | ﹤0.01% |
241
+142
| +143% | +$8.69K |
|
|
ACOR
1875
CALL
DELISTED
Acorda Therapeutics
ACOR
| $66K | ﹤0.01% |
+9
| New | +$26.9K |
|
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.