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 | |
|---|---|---|---|---|---|---|
|
NVDQ
601
DELISTED
Novadaq Technologies Inc.
NVDQ
| $544K | 0.02% |
+46,469
| New | +$368K |
|
602
HDFC Bank
HDB
$119B
| $543K | 0.02% |
24,976
-67,076
| -73% | -$1.4M |
|
603
iShares Core S&P Mid-Cap ETF
IJH
$123B
| $543K | 0.02% |
+15,630
| New | +$540K |
|
604
PUT
Procter & Gamble
PG
$347B
| $543K | 0.02% |
7,674
-1,597
| -17% | -$141K |
|
|
BNY
605
CALL
Bank of New York Mellon
BNY
$110B
| $541K | 0.02% |
1,057
+236
| +29% | +$11.3K |
|
606
iShares US Home Construction ETF
ITB
$2.37B
| $541K | 0.02% |
15,950
-6,047
| -27% | -$198K |
|
607
PUT
McKesson
MCK
$95.3B
| $541K | 0.02% |
166
-309
| -65% | -$46.8K |
|
608
Synaptics
SYNA
$4.71B
| $538K | 0.02% |
10,410
-7,689
| -42% | -$419K |
|
609
PUT
Merck
MRK
$315B
| $537K | 0.02% |
4,079
-83
| -2% | -$5.05K |
|
|
CAFD
610
DELISTED
8point3 Energy Partners LP
CAFD
| $537K | 0.02% |
+35,523
| New | +$469K |
|
611
Reliance Steel & Aluminium
RS
$19.7B
| $536K | 0.02% |
+7,370
| New | +$551K |
|
|
ESRX
612
CALL
DELISTED
Express Scripts Holding Company
ESRX
| $536K | 0.02% |
2,125
+355
| +20% | +$22.3K |
|
613
CALL
Skyworks Solutions
SWKS
$9.5B
| $535K | 0.02% |
810
-325
| -29% | -$33.3K |
|
614
Cooper Companies
COO
$13.7B
| $534K | 0.02% |
+8,936
| New | +$485K |
|
615
CALL
First Solar
FSLR
$22.4B
| $534K | 0.02% |
1,656
+700
| +73% | +$23.8K |
|
|
DATA
616
DELISTED
Tableau Software, Inc.
DATA
| $534K | 0.02% |
8,725
-20,426
| -70% | -$1.2M |
|
|
SNBR
617
CALL
DELISTED
Sleep Number
SNBR
| $533K | 0.02% |
416
-49
| -11% | -$1.47K |
|
618
PUT
Ulta Beauty
ULTA
$20.8B
| $533K | 0.02% |
619
-304
| -33% | -$88.7K |
|
619
Marriott Vacations Worldwide
VAC
$3.33B
| $533K | 0.02% |
4,533
+4,167
| +1,139% | +$470K |
|
620
CALL
United Airlines
UAL
$38.1B
| $531K | 0.02% |
1,581
-628
| -28% | -$47.4K |
|
621
United Natural Foods
UNFI
$3.03B
| $530K | 0.02% |
14,457
+12,651
| +700% | +$508K |
|
622
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $529K | 0.02% |
2,859
-2,903
| -50% | -$609K |
|
|
DVAX
623
CALL
DELISTED
Dynavax Technologies
DVAX
| $529K | 0.02% |
1,683
+803
| +91% | +$5.21K |
|
624
WIX.com
WIX
$2.04B
| $529K | 0.02% |
7,614
-19,718
| -72% | -$1.47M |
|
|
HYGS
625
DELISTED
Hydrogenics Corp
HYGS
| $526K | 0.02% |
52,092
+43,886
| +535% | +$349K |
|
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.