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 | |
|---|---|---|---|---|---|---|
451
CALL
3M
MMM
$89.1B
| $809K | 0.03% |
1,648
+287
| +21% | +$49.7K |
|
|
MZOR
452
DELISTED
Mazor Robotics Ltd.
MZOR
| $805K | 0.03% |
16,307
+10,200
| +167% | +$425K |
|
453
Acadia Pharmaceuticals
ACAD
$4.27B
| $799K | 0.03% |
21,226
-49,457
| -70% | -$1.61M |
|
454
National Beverage
FIZZ
$2.91B
| $799K | 0.03% |
12,888
+11,346
| +736% | +$629K |
|
455
CALL
Pfizer
PFE
$141B
| $796K | 0.03% |
3,778
+2,080
| +122% | +$66.9K |
|
|
BIG
456
DELISTED
Big Lots, Inc.
BIG
| $796K | 0.03% |
+14,867
| New | +$733K |
|
|
RSX
457
DELISTED
VanEck Russia ETF
RSX
| $796K | 0.03% |
35,732
-40,279
| -53% | -$831K |
|
|
AEL
458
CALL
DELISTED
American Equity Investment Life Holding Company
AEL
| $794K | 0.03% |
1,946
+1,935
| +17,591% | +$53.4K |
|
459
Lockheed Martin
LMT
$119B
| $789K | 0.03% |
2,545
-24,899
| -91% | -$7.43M |
|
|
TWX
460
PUT
DELISTED
Time Warner Inc
TWX
| $789K | 0.03% |
6,384
+4,196
| +192% | +$426K |
|
461
CALL
AT&T
T
$160B
| $784K | 0.03% |
5,988
+1,215
| +25% | +$34.5K |
|
|
XLNX
462
CALL
DELISTED
Xilinx Inc
XLNX
| $782K | 0.03% |
1,356
-153
| -10% | -$10K |
|
463
Century Communities
CCS
$1.86B
| $781K | 0.03% |
31,650
+8,127
| +35% | +$197K |
|
|
SFLY
464
DELISTED
Shutterfly, Inc.
SFLY
| $781K | 0.03% |
+16,116
| New | +$759K |
|
465
Duke Energy
DUK
$99.7B
| $780K | 0.03% |
+9,300
| New | +$796K |
|
466
CALL
Broadcom
AVGO
$1.89T
| $779K | 0.03% |
15,300
-6,180
| -29% | -$153K |
|
467
Trane Technologies
TT
$105B
| $779K | 0.03% |
8,737
-697
| -7% | -$61.6K |
|
|
JOYY
468
CALL
JOYY Inc
JOYY
$3.65B
| $779K | 0.03% |
445
+158
| +55% | +$11.5K |
|
469
FTAI Aviation
FTAI
$22.8B
| $776K | 0.03% |
50,402
+271
| +0.5% | +$3.96K |
|
470
Under Armour
UAA
$3.1B
| $775K | 0.03% |
47,071
+17,019
| +57% | +$312K |
|
471
WisdomTree India Earnings Fund ETF
EPI
$2.03B
| $770K | 0.03% |
30,599
+12,705
| +71% | +$330K |
|
472
CALL
Valero Energy
VLO
$92.3B
| $766K | 0.03% |
1,854
+549
| +42% | +$37.8K |
|
|
QEP
473
DELISTED
QEP RESOURCES, INC.
QEP
| $765K | 0.03% |
89,305
+66,017
| +283% | +$540K |
|
474
TAL Education Group
TAL
$5.73B
| $764K | 0.03% |
22,679
+10,709
| +89% | +$302K |
|
|
ADMS
475
DELISTED
Adamas Pharmaceuticals
ADMS
| $762K | 0.03% |
+36,024
| New | +$660K |
|
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.