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 |
Amazon
AMZN
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
3576
CALL
Kirby Corp
KEX
$7.77B
| $15K | ﹤0.01% |
60
-114
| -66% | -$7.77K |
|
3577
PUT
KKR & Co
KKR
$92.2B
| $15K | ﹤0.01% |
461
+177
| +62% | +$3.24K |
|
|
MAG
3578
DELISTED
MAG Silver
MAG
| $15K | ﹤0.01% |
1,216
-2,910
| -71% | -$36.3K |
|
3579
CALL
Moody's
MCO
$83.9B
| $15K | ﹤0.01% |
29
-356
| -92% | -$41.7K |
|
3580
PUT
MacroGenics
MGNX
$245M
| $15K | ﹤0.01% |
+201
| New | +$3.83K |
|
3581
PUT
MasTec
MTZ
$24.7B
| $15K | ﹤0.01% |
125
-126
| -50% | -$5.45K |
|
|
NAK
3582
CALL
Northern Dynasty Minerals
NAK
$812M
| $15K | ﹤0.01% |
770
+650
| +542% | +$1.04K |
|
3583
PUT
Global X MSCI Norway ETF
NORW
$85M
| $15K | ﹤0.01% |
+614
| New | +$13.4K |
|
3584
CALL
PBF Energy
PBF
$7.22B
| $15K | ﹤0.01% |
165
-338
| -67% | -$7.26K |
|
3585
PUT
Philips
PHG
$24.8B
| $15K | ﹤0.01% |
765
-79
| -9% | -$2.07K |
|
3586
Protalix BioTherapeutics
PLX
$188M
| $15K | ﹤0.01% |
1,800
-11,044
| -86% | -$104K |
|
3587
CALL
Progress Software
PRGS
$1.66B
| $15K | ﹤0.01% |
109
-2
| -2% | -$59 |
|
3588
ProShares Trust UltraShort Lehman 7-10 Year Treasury
PST
$10.5M
| $15K | ﹤0.01% |
+735
| New | +$15.8K |
|
3589
CALL
Prudential
PUK
$36.1B
| $15K | ﹤0.01% |
61
+4
| +7% | +$173 |
|
3590
CALL
FreightCar America
RAIL
$280M
| $15K | ﹤0.01% |
74
-26
| -26% | -$405 |
|
3591
CALL
Shake Shack
SHAK
$2.55B
| $15K | ﹤0.01% |
221
-194
| -47% | -$6.94K |
|
3592
CALL
Silicon Motion
SIMO
$7.51B
| $15K | ﹤0.01% |
117
+28
| +31% | +$1.39K |
|
3593
CALL
SL Green Realty
SLG
$3.77B
| $15K | ﹤0.01% |
80
+9
| +13% | +$917 |
|
|
SRG
3594
PUT
Seritage Growth Properties
SRG
$129M
| $15K | ﹤0.01% |
529
+185
| +54% | +$7.66K |
|
3595
CALL
Taylor Morrison
TMHC
| $15K | ﹤0.01% |
+87
| New | +$2K |
|
3596
PUT
Targa Resources
TRGP
$56.2B
| $15K | ﹤0.01% |
125
-165
| -57% | -$8.31K |
|
3597
PUT
Trinity Industries
TRN
$3.03B
| $15K | ﹤0.01% |
382
-363
| -49% | -$6.97K |
|
3598
PUT
Textron
TXT
$15.6B
| $15K | ﹤0.01% |
147
+73
| +99% | +$3.43K |
|
3599
Universal Technical Institute
UTI
$2.15B
| $15K | ﹤0.01% |
+4,329
| New | +$15.6K |
|
3600
PUT
NCR Voyix
VYX
$1.19B
| $15K | ﹤0.01% |
243
+44
| +22% | +$1.12K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.