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
|
+$45.9M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$30.1M |
| 3 |
TWX
Time Warner Inc
TWX
|
+$25.8M |
| 4 |
Booking.com
BKNG
|
+$22.5M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$17.7M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$43.6M |
| 2 |
Amgen
AMGN
|
+$33.2M |
| 3 |
Baidu
BIDU
|
+$19.3M |
| 4 |
Alphabet (Google) Class A
GOOGL
|
+$17.3M |
| 5 |
Micron Technology
MU
|
+$17.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Consumer Discretionary | 14.31% |
| 2 | Technology | 13.17% |
| 3 | Communication Services | 11.81% |
| 4 | Healthcare | 4.06% |
| 5 | Financials | 3.84% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
351
PUT
United Airlines
UAL
$38.1B
| $1.06M | 0.04% |
3,723
+272
| +8% | +$18.1K |
|
|
ZGNX
352
DELISTED
Zogenix, Inc.
ZGNX
| $1.06M | 0.04% |
+30,352
| New | +$412K |
|
|
NBL
353
DELISTED
Noble Energy, Inc.
NBL
| $1.05M | 0.04% |
+37,209
| New | +$980K |
|
354
Dominion Energy
D
$62.5B
| $1.05M | 0.04% |
+13,644
| New | +$1.06M |
|
355
PUT
State Street SPDR NYSE Technology ETF
XNTK
$2.14B
| $1.05M | 0.04% |
11,534
-5,997
| -34% | -$458K |
|
356
Ambarella
AMBA
$3.03B
| $1.04M | 0.04% |
21,299
+18,272
| +604% | +$901K |
|
|
SCHW
357
Charles Schwab
SCHW
$175B
| $1.04M | 0.04% |
+23,740
| New | +$986K |
|
358
CALL
Sarepta Therapeutics
SRPT
$1.67B
| $1.04M | 0.04% |
1,886
+1,417
| +302% | +$56.6K |
|
359
Infosys
INFY
$44.3B
| $1.03M | 0.04% |
141,642
+101,712
| +255% | +$770K |
|
|
SBNY
360
DELISTED
Signature Bank
SBNY
| $1.03M | 0.04% |
8,064
+6,476
| +408% | +$850K |
|
361
KraneShares CSI China Internet ETF
KWEB
$5.23B
| $1.03M | 0.04% |
18,104
-2,287
| -11% | -$125K |
|
362
Agnico Eagle Mines
AEM
$73.5B
| $1.03M | 0.04% |
22,762
+17,019
| +296% | +$796K |
|
|
363
PUT
Baidu
BIDU
$36.6B
| $1.03M | 0.04% |
3,089
-1,103
| -26% | -$241K |
|
364
PUT
Mondelez International
MDLZ
$78.1B
| $1.03M | 0.04% |
5,823
-1,472
| -20% | -$62.5K |
|
365
CALL
AB InBev
BUD
$161B
| $1.02M | 0.04% |
1,659
+78
| +5% | +$9.13K |
|
366
Cognex
CGNX
$10.4B
| $1.02M | 0.04% |
18,598
+4,026
| +28% | +$204K |
|
367
iShares MSCI Hong Kong ETF
EWH
$1.22B
| $1.02M | 0.04% |
41,532
+39,995
| +2,602% | +$972K |
|
368
CALL
Thermo Fisher Scientific
TMO
$196B
| $1.02M | 0.04% |
534
+246
| +85% | +$44.6K |
|
369
Lowe's Companies
LOW
$115B
| $1.02M | 0.04% |
+12,750
| New | +$976K |
|
370
iShares MSCI Emerging Markets Min Vol Factor ETF
EEMV
$3.49B
| $1.02M | 0.04% |
17,529
+11,688
| +200% | +$672K |
|
371
Sprouts Farmers Market
SFM
$6.95B
| $1.02M | 0.04% |
54,217
+37,764
| +230% | +$836K |
|
372
PUT
Costco
COST
$411B
| $1.01M | 0.04% |
4,507
-504
| -10% | -$79.2K |
|
373
Nabors Industries
NBR
$1.26B
| $1.01M | 0.04% |
2,504
-957
| -28% | -$350K |
|
374
Service Corp International
SCI
$10.7B
| $1.01M | 0.04% |
29,211
-23,504
| -45% | -$816K |
|
|
VIAB
375
PUT
DELISTED
Viacom Inc. Class B
VIAB
| $1.01M | 0.04% |
1,953
+644
| +49% | +$19.9K |
|
Similar funds
Simplex Trading's Q3 2017 Portfolio in Review
As of Q3 2017, Simplex Trading held 7,357 positions worth $2.45B, up 6.4% from $2.3B the previous quarter. Its ten largest holdings account for 24% of the portfolio.
Simplex Trading's Q3 2017 filing shows 1,313 new, 2,078 increased, 2,339 reduced and 1,500 closed positions. Its largest new stake was iShares Russell 2000 ETF: 214,170 shares worth $31.7M. The largest sale was State Street SPDR S&P 500 ETF Trust, an estimated $43.6M.
By sector, the portfolio is most concentrated in Consumer Discretionary at 14% of assets, up from 9.7% a quarter earlier, followed by Technology and Communication Services.
- Simplex Trading's largest Q3 2017 buy was iShares Russell 2000 ETF: 214,170 shares worth $31.7M.
- Simplex Trading added most to Amazon in Q3 2017, an estimated $45.9M increase.
- Simplex Trading's biggest Q3 2017 reduction was Baidu, cutting an estimated $19.3M.
- Simplex Trading fully exited State Street SPDR S&P 500 ETF Trust in Q3 2017, selling an estimated $43.6M.
- Simplex Trading's ten largest holdings make up 24% of its $2.45B portfolio in Q3 2017.
- Simplex Trading opened 1,313 new positions and closed 1,500 in Q3 2017.
- Simplex Trading's portfolio value rose 6.4% quarter-over-quarter to $2.45B.
Based on Simplex Trading's 13F filing for Q3 2017, filed 25 Oct 2017.