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 | |
|---|---|---|---|---|---|---|
3376
PUT
Hormel Foods
HRL
$14.2B
| $13K | ﹤0.01% |
128
-94
| -42% | -$3.49K |
|
3377
CALL
Heron Therapeutics
HRTX
$87.6M
| $13K | ﹤0.01% |
154
+110
| +250% | +$2.04K |
|
3378
CALL
IDT Corp
IDT
$1.64B
| $13K | ﹤0.01% |
+78
| New | +$998 |
|
|
BRSL
3379
CALL
Brightstar Lottery PLC
BRSL
$1.95B
| $13K | ﹤0.01% |
+149
| New | +$3.29K |
|
3380
CALL
Keurig Dr Pepper
KDP
$40.9B
| $13K | ﹤0.01% |
169
+154
| +1,027% | +$14.6K |
|
3381
Lattice Semiconductor
LSCC
$16.5B
| $13K | ﹤0.01% |
2,009
-18,332
| -90% | -$111K |
|
3382
PUT
Marvell Technology
MRVL
$168B
| $13K | ﹤0.01% |
397
-490
| -55% | -$5.75K |
|
3383
Vitamin Cottage Natural Grocers
NGVC
$720M
| $13K | ﹤0.01% |
1,191
+276
| +30% | +$3.41K |
|
3384
PUT
NRG Energy
NRG
$29.3B
| $13K | ﹤0.01% |
106
+55
| +108% | +$717 |
|
3385
Oaktree Specialty Lending
OCSL
$1.05B
| $13K | ﹤0.01% |
+757
| New | +$13K |
|
3386
iShares MSCI Global Metals & Mining Producers ETF
PICK
$2.17B
| $13K | ﹤0.01% |
+573
| New | +$12.6K |
|
|
PINC
3387
DELISTED
Premier
PINC
| $13K | ﹤0.01% |
+403
| New | +$13.1K |
|
3388
CALL
Patterson-UTI
PTEN
$3.69B
| $13K | ﹤0.01% |
54
-462
| -90% | -$9.28K |
|
3389
PUT
Sturm, Ruger & Co
RGR
$618M
| $13K | ﹤0.01% |
59
-52
| -47% | -$3.29K |
|
3390
CALL
ResMed
RMD
$29.4B
| $13K | ﹤0.01% |
283
+208
| +277% | +$13.8K |
|
3391
PUT
Ross Stores
ROST
$77.4B
| $13K | ﹤0.01% |
69
+7
| +11% | +$430 |
|
3392
PUT
Ryanair
RYAAY
$30B
| $13K | ﹤0.01% |
228
+183
| +407% | +$5.31K |
|
3393
CALL
Boston Beer
SAM
$1.88B
| $13K | ﹤0.01% |
68
| – | – |
|
3394
CALL
SFL Corp
SFL
$1.58B
| $13K | ﹤0.01% |
682
+338
| +98% | +$5.06K |
|
3395
CALL
Shake Shack
SHAK
$2.46B
| $13K | ﹤0.01% |
96
-262
| -73% | -$9.71K |
|
3396
Sun Life Financial
SLF
$45.7B
| $13K | ﹤0.01% |
+424
| New | +$13.6K |
|
3397
CALL
Sempra
SRE
$60.1B
| $13K | ﹤0.01% |
348
+322
| +1,238% | +$17.5K |
|
|
STKL
3398
DELISTED
SunOpta
STKL
| $13K | ﹤0.01% |
1,981
-3,108
| -61% | -$18.9K |
|
3399
CALL
TAL Education Group
TAL
$5.83B
| $13K | ﹤0.01% |
396
+252
| +175% | +$2.66K |
|
3400
PUT
Atlassian
TEAM
$23.9B
| $13K | ﹤0.01% |
171
+11
| +7% | +$322 |
|
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.