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 | |
|---|---|---|---|---|---|---|
1351
American Vanguard Corp
AVD
$72.7M
| $159K | 0.01% |
6,949
+5,159
| +288% | +$102K |
|
1352
PUT
Best Buy
BBY
$18B
| $159K | 0.01% |
1,893
+1,322
| +232% | +$75.8K |
|
1353
PUT
eBay
EBAY
$48.2B
| $159K | 0.01% |
1,314
-73
| -5% | -$2.65K |
|
1354
Etsy
ETSY
$7.64B
| $159K | 0.01% |
9,448
-41,671
| -82% | -$657K |
|
|
EGRX
1355
DELISTED
Eagle Pharmaceuticals, Inc.
EGRX
| $159K | 0.01% |
+2,681
| New | +$162K |
|
|
TCO
1356
DELISTED
Taubman Centers Inc.
TCO
| $159K | 0.01% |
3,219
+2,041
| +173% | +$112K |
|
|
MNK
1357
PUT
DELISTED
MALLINCKRODT PUBLIC LIMITED COMPANY
MNK
| $159K | 0.01% |
514
+44
| +9% | +$1.75K |
|
1358
Diageo
DEO
$46.2B
| $158K | 0.01% |
+1,200
| New | +$155K |
|
|
HIMX
1359
CALL
Himax Technologies
HIMX
$2.2B
| $158K | 0.01% |
688
-64
| -9% | -$581 |
|
|
BRSL
1360
CALL
Brightstar Lottery PLC
BRSL
$1.93B
| $158K | 0.01% |
450
+349
| +346% | +$7.12K |
|
1361
Veracyte
VCYT
$4.53B
| $158K | 0.01% |
18,034
+9,294
| +106% | +$75.6K |
|
1362
PUT
Cummins
CMI
$91.3B
| $157K | 0.01% |
530
-180
| -25% | -$29.1K |
|
|
TECD
1363
DELISTED
Tech Data Corp
TECD
| $157K | 0.01% |
+1,775
| New | +$175K |
|
1364
PUT
Akamai
AKAM
$17B
| $156K | 0.01% |
1,471
+773
| +111% | +$37K |
|
1365
PUT
Applied Materials
AMAT
$431B
| $156K | 0.01% |
3,002
+479
| +19% | +$21.7K |
|
1366
Acuity Brands
AYI
$9.8B
| $156K | 0.01% |
911
-6,329
| -87% | -$1.18M |
|
1367
PUT
BP
BP
$114B
| $156K | 0.01% |
1,498
-542
| -27% | -$17.2K |
|
1368
CALL
Incyte
INCY
$23.4B
| $156K | 0.01% |
381
-67
| -15% | -$8.48K |
|
1369
PUT
PTC Therapeutics
PTCT
$6.44B
| $156K | 0.01% |
1,457
+267
| +22% | +$5.23K |
|
1370
Sociedad Química y Minera de Chile
SQM
$19.9B
| $156K | 0.01% |
2,820
-11,692
| -81% | -$525K |
|
1371
CVR Partners
UAN
$1.3B
| $156K | 0.01% |
4,853
+4,178
| +619% | +$137K |
|
|
LGF.B
1372
DELISTED
Lions Gate Entertainment Corp. Class B Non-Voting Shares
LGF.B
| $156K | 0.01% |
4,930
-1,494
| -23% | -$41.8K |
|
|
GNC
1373
PUT
DELISTED
GNC Holdings, Inc.
GNC
| $156K | 0.01% |
450
+65
| +17% | +$585 |
|
|
WES
1374
PUT
DELISTED
Western Gas Partners Lp
WES
| $156K | 0.01% |
89
+38
| +75% | +$1.98K |
|
1375
Ashland
ASH
$3.08B
| $155K | 0.01% |
2,373
-14,207
| -86% | -$905K |
|
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.