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 | |
|---|---|---|---|---|---|---|
|
GWPH
301
DELISTED
GW Pharmaceuticals Plc American Depositary Shares
GWPH
| $1.28M | 0.05% |
+12,659
| New | +$1.36M |
|
302
State Street Industrial Select Sector SPDR ETF
XLI
$33.1B
| $1.28M | 0.05% |
+18,062
| New | +$1.24M |
|
303
iShares Select Dividend ETF
DVY
$23.8B
| $1.28M | 0.05% |
13,655
+12,711
| +1,347% | +$1.18M |
|
304
CALL
Align Technology
ALGN
$12.4B
| $1.26M | 0.05% |
520
+171
| +49% | +$29.3K |
|
|
ALXN
305
CALL
DELISTED
Alexion Pharmaceuticals
ALXN
| $1.26M | 0.05% |
957
-989
| -51% | -$134K |
|
306
PUT
iShares MSCI Australia ETF
EWA
$1.35B
| $1.26M | 0.05% |
13,866
+2,872
| +26% | +$64.6K |
|
307
Teck Resources
TECK
$28B
| $1.25M | 0.05% |
59,078
+35,884
| +155% | +$781K |
|
|
KW
308
DELISTED
Kennedy-Wilson Holdings
KW
| $1.24M | 0.05% |
67,036
-17,071
| -20% | -$329K |
|
309
CALL
United Parcel Service
UPS
$98.6B
| $1.23M | 0.05% |
3,565
-1,001
| -22% | -$114K |
|
|
SLCA
310
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $1.23M | 0.05% |
39,681
+23,647
| +147% | +$685K |
|
|
ETP
311
DELISTED
Energy Transfer Partners, L.P.
ETP
| $1.23M | 0.05% |
67,177
+12,302
| +22% | +$239K |
|
|
AL
312
DELISTED
Air Lease Corp
AL
| $1.23M | 0.05% |
28,802
+12,661
| +78% | +$505K |
|
313
iShares Semiconductor ETF
SOXX
$46.8B
| $1.22M | 0.05% |
+23,133
| New | +$1.15M |
|
314
CALL
United Rentals
URI
$64.7B
| $1.22M | 0.05% |
1,799
+1,351
| +302% | +$161K |
|
315
Ford
F
$57.3B
| $1.22M | 0.05% |
102,053
-73,429
| -42% | -$828K |
|
316
Kraft Heinz
KHC
$30.8B
| $1.22M | 0.05% |
15,714
-22,552
| -59% | -$1.89M |
|
317
PUT
Macy's
M
$6.38B
| $1.21M | 0.05% |
3,715
+224
| +6% | +$4.92K |
|
|
GAP
318
The Gap Inc
GAP
$7.07B
| $1.21M | 0.05% |
40,993
-25,240
| -38% | -$620K |
|
|
MDCO
319
DELISTED
Medicines Co
MDCO
| $1.21M | 0.05% |
32,549
+25,678
| +374% | +$947K |
|
320
TechnipFMC
FTI
$30B
| $1.2M | 0.05% |
+57,961
| New | +$1.16M |
|
321
Kinder Morgan
KMI
$72.3B
| $1.2M | 0.05% |
62,665
-15,840
| -20% | -$309K |
|
322
PUT
Johnson & Johnson
JNJ
$613B
| $1.19M | 0.05% |
4,128
-1,993
| -33% | -$264K |
|
323
CALL
Palo Alto Networks
PANW
$272B
| $1.19M | 0.05% |
8,970
+1,554
| +21% | +$35.4K |
|
324
CALL
Expedia Group
EXPE
$31.3B
| $1.19M | 0.05% |
1,634
+689
| +73% | +$102K |
|
|
325
Palo Alto Networks
PANW
$272B
| $1.18M | 0.05% |
49,122
-77,088
| -61% | -$1.76M |
|
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.