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 | |
|---|---|---|---|---|---|---|
2001
CALL
Arista Networks
ANET
$219B
| $56K | ﹤0.01% |
1,328
-2,336
| -64% | -$11.1K |
|
2002
CALL
BioMarin Pharmaceuticals
BMRN
$11.5B
| $56K | ﹤0.01% |
239
-127
| -35% | -$12K |
|
|
CMA
2003
PUT
DELISTED
Comerica
CMA
| $56K | ﹤0.01% |
1,026
+644
| +169% | +$29.2K |
|
2004
Deluxe
DLX
$1.19B
| $56K | ﹤0.01% |
+852
| New | +$58K |
|
2005
PUT
Equinix
EQIX
$107B
| $56K | ﹤0.01% |
376
+310
| +470% | +$115K |
|
|
HTBK
2006
DELISTED
Heritage Commerce
HTBK
| $56K | ﹤0.01% |
5,172
+3,213
| +164% | +$35.6K |
|
|
JNPR
2007
PUT
DELISTED
Juniper Networks
JNPR
| $56K | ﹤0.01% |
665
+126
| +23% | +$2.92K |
|
2008
PUT
Qorvo
QRVO
$7.63B
| $56K | ﹤0.01% |
115
+22
| +24% | +$1.25K |
|
|
CTLT
2009
CALL
DELISTED
CATALENT, INC.
CTLT
| $56K | ﹤0.01% |
413
+363
| +726% | +$9.03K |
|
|
PTLA
2010
CALL
DELISTED
Portola Pharmaceuticals, Inc.
PTLA
| $56K | ﹤0.01% |
+316
| New | +$7.42K |
|
|
WFT
2011
PUT
DELISTED
Weatherford International plc
WFT
| $56K | ﹤0.01% |
500
-194
| -28% | -$1.1K |
|
2012
PUT
Applied Materials
AMAT
$426B
| $55K | ﹤0.01% |
934
-2,499
| -73% | -$69.7K |
|
2013
PUT
Best Buy
BBY
$18B
| $55K | ﹤0.01% |
709
+396
| +127% | +$13.9K |
|
2014
CALL
Blackrock
BLK
$164B
| $55K | ﹤0.01% |
195
+108
| +124% | +$39.3K |
|
2015
PUT
Frontline
FRO
$8.75B
| $55K | ﹤0.01% |
275
-22
| -7% | -$170 |
|
2016
CALL
Kinross Gold
KGC
$28.5B
| $55K | ﹤0.01% |
510
-357
| -41% | -$1.72K |
|
2017
CALL
ON Semiconductor
ON
$33.8B
| $55K | ﹤0.01% |
365
+159
| +77% | +$1.65K |
|
2018
CALL
Pentair
PNR
$10.2B
| $55K | ﹤0.01% |
277
+34
| +14% | +$1.43K |
|
2019
Sabra Healthcare REIT
SBRA
$5.64B
| $55K | ﹤0.01% |
+2,187
| New | +$52.4K |
|
2020
Unisys
UIS
$227M
| $55K | ﹤0.01% |
5,664
-321
| -5% | -$2.98K |
|
2021
Webster Financial
WBS
$12.3B
| $55K | ﹤0.01% |
1,458
-481
| -25% | -$17.7K |
|
|
LCI
2022
DELISTED
Lannett Company, Inc.
LCI
| $55K | ﹤0.01% |
525
-698
| -57% | -$85.3K |
|
|
GPOR
2023
PUT
DELISTED
Gulfport Energy Corp.
GPOR
| $55K | ﹤0.01% |
386
+242
| +168% | +$6.9K |
|
|
CRCM
2024
CALL
DELISTED
CARE.COM, INC.
CRCM
| $55K | ﹤0.01% |
74
-1
| -1% | -$11 |
|
|
PWE
2025
PUT
DELISTED
Penn West Energy Petroleum Ltd
PWE
| $55K | ﹤0.01% |
355
-78
| -18% | -$121 |
|
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.