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 |
LNKD
LinkedIn Corporation
LNKD
|
+$21.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.3M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$15M |
| 4 |
Biogen
BIIB
|
+$14.9M |
| 5 |
Visa
V
|
+$14.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$36.7M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$14.7M |
| 5 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$13.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 6.61% |
| 2 | Healthcare | 6.55% |
| 3 | Technology | 6.45% |
| 4 | Consumer Discretionary | 4.54% |
| 5 | Financials | 4.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3426
CALL
Public Service Enterprise Group
PEG
$39.3B
| $12K | ﹤0.01% |
88
-58
| -40% | -$2.63K |
|
3427
CALL
POSCO
PKX
$15.5B
| $12K | ﹤0.01% |
22
+2
| +10% | +$94 |
|
3428
CALL
Dave & Buster's
PLAY
$361M
| $12K | ﹤0.01% |
31
-26
| -46% | -$1.08K |
|
3429
PUT
Protalix BioTherapeutics
PLX
$188M
| $12K | ﹤0.01% |
+28
| New | +$224 |
|
|
P
3430
CALL
Everpure Inc
P
$24.3B
| $12K | ﹤0.01% |
126
-250
| -66% | -$3.26K |
|
3431
PUT
Qualys
QLYS
$4.78B
| $12K | ﹤0.01% |
89
+50
| +128% | +$1.4K |
|
3432
PUT
Sturm, Ruger & Co
RGR
$611M
| $12K | ﹤0.01% |
111
-174
| -61% | -$11.2K |
|
3433
PUT
Rapid7
RPD
$642M
| $12K | ﹤0.01% |
+25
| New | +$317 |
|
3434
CALL
Revvity
RVTY
$12.4B
| $12K | ﹤0.01% |
32
-31
| -49% | -$1.63K |
|
3435
CALL
Rayonier
RYN
$6.64B
| $12K | ﹤0.01% |
83
+18
| +28% | +$413 |
|
3436
CALL
SolarEdge
SEDG
$2.44B
| $12K | ﹤0.01% |
194
+16
| +9% | +$360 |
|
|
SNBR
3437
PUT
DELISTED
Sleep Number
SNBR
| $12K | ﹤0.01% |
130
+98
| +306% | +$2.14K |
|
3438
CALL
Sonoco
SON
$5.99B
| $12K | ﹤0.01% |
36
| – | – |
|
3439
PUT
Sony
SONY
$133B
| $12K | ﹤0.01% |
870
-1,110
| -56% | -$5.96K |
|
3440
PUT
SS&C Technologies
SSNC
$18.8B
| $12K | ﹤0.01% |
+60
| New | +$1.8K |
|
3441
CALL
Texas Capital Bancshares
TCBI
$4.29B
| $12K | ﹤0.01% |
53
+4
| +8% | +$179 |
|
3442
PUT
Teradata
TDC
$2.75B
| $12K | ﹤0.01% |
30
+26
| +650% | +$690 |
|
3443
PUT
T-Mobile US
TMUS
$196B
| $12K | ﹤0.01% |
109
-7
| -6% | -$287 |
|
3444
Towne Bank
TOWN
$3.53B
| $12K | ﹤0.01% |
+565
| New | +$11.8K |
|
3445
CALL
Travere Therapeutics
TVTX
$5.2B
| $12K | ﹤0.01% |
44
-37
| -46% | -$599 |
|
3446
PUT
Universal Insurance Holdings
UVE
$1.23B
| $12K | ﹤0.01% |
263
+44
| +20% | +$795 |
|
3447
PUT
Dentsply Sirona
XRAY
$2.7B
| $12K | ﹤0.01% |
15
+6
| +67% | +$369 |
|
3448
CALL
Xerox
XRX
$360M
| $12K | ﹤0.01% |
202
+4
| +2% | +$105 |
|
3449
PUT
Zumiez
ZUMZ
$347M
| $12K | ﹤0.01% |
37
-69
| -65% | -$1.1K |
|
|
VIVS
3450
PUT
VivoSim Labs
VIVS
$1.33M
| $12K | ﹤0.01% |
1
| – | – |
|
Similar funds
Simplex Trading's Q2 2016 Portfolio in Review
As of Q2 2016, Simplex Trading held 7,153 positions worth $1.5B, up 19% from $1.25B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading deployed $178M of net new capital in Q2 2016, opening 1,586 new positions and adding to 2,321 existing holdings. Its largest new stake was Biogen: 56,467 shares worth $13.7M.
By sector, the portfolio is most concentrated in Communication Services at 6.6% of assets, down from 6.9% a quarter earlier, followed by Healthcare and Technology.
On the sell side, the largest reduction was Broadcom, an estimated $36.7M trimmed.
- Simplex Trading's largest Q2 2016 buy was Biogen: 56,467 shares worth $13.7M.
- Simplex Trading added most to LinkedIn Corporation in Q2 2016, an estimated $21.4M increase.
- Simplex Trading's biggest Q2 2016 reduction was Broadcom, cutting an estimated $36.7M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q2 2016, selling an estimated $20.1M.
- Simplex Trading's ten largest holdings make up 19% of its $1.5B portfolio in Q2 2016.
- Simplex Trading opened 1,586 new positions and closed 1,363 in Q2 2016.
- Simplex Trading's portfolio value rose 19% quarter-over-quarter to $1.5B.
Based on Simplex Trading's 13F filing for Q2 2016, filed 18 Jul 2016.