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 | |
|---|---|---|---|---|---|---|
1801
CALL
Aurinia Pharmaceuticals
AUPH
$1.97B
| $94K | ﹤0.01% |
899
-165
| -16% | -$1.11K |
|
1802
PUT
CSX Corp
CSX
$98.6B
| $94K | ﹤0.01% |
6,429
-321
| -5% | -$5.5K |
|
1803
Equifax
EFX
$20.3B
| $94K | ﹤0.01% |
+686
| New | +$94.2K |
|
1804
Equity Residential
EQR
$25.4B
| $94K | ﹤0.01% |
1,438
+429
| +43% | +$28K |
|
1805
Manitowoc
MTW
$516M
| $94K | ﹤0.01% |
3,944
-262
| -6% | -$6.13K |
|
1806
PUT
Ross Stores
ROST
$76.6B
| $94K | ﹤0.01% |
569
+547
| +2,486% | +$34.1K |
|
|
AFTY
1807
DELISTED
Pacer CSOP FTSE China A50 ETF
AFTY
| $94K | ﹤0.01% |
6,150
-15,323
| -71% | -$219K |
|
|
ATCO
1808
DELISTED
Atlas Corp.
ATCO
| $94K | ﹤0.01% |
13,289
+13,037
| +5,173% | +$81K |
|
|
PF
1809
PUT
DELISTED
Pinnacle Foods, Inc.
PF
| $94K | ﹤0.01% |
611
+422
| +223% | +$25.2K |
|
1810
Artisan Partners
APAM
$2.79B
| $93K | ﹤0.01% |
+3,034
| New | +$87.2K |
|
1811
Box
BOX
$4.02B
| $93K | ﹤0.01% |
+5,110
| New | +$92.2K |
|
1812
CALL
GE Aerospace
GE
$367B
| $93K | ﹤0.01% |
570
-6
| -1% | -$822 |
|
1813
Gen Digital
GEN
$15.6B
| $93K | ﹤0.01% |
3,300
+2,511
| +318% | +$76K |
|
1814
PUT
Ovintiv
OVV
$17.5B
| $93K | ﹤0.01% |
67
-90
| -57% | -$4.66K |
|
1815
UBS Group
UBS
$170B
| $93K | ﹤0.01% |
5,524
-886
| -14% | -$14.4K |
|
1816
CALL
Ubiquiti
UI
$31.8B
| $93K | ﹤0.01% |
276
+172
| +165% | +$8.51K |
|
|
AMTD
1817
CALL
DELISTED
TD Ameritrade Holding Corp
AMTD
| $93K | ﹤0.01% |
333
-260
| -44% | -$10.1K |
|
1818
CALL
Autohome
ATHM
$2.43B
| $92K | ﹤0.01% |
362
+131
| +57% | +$5.08K |
|
1819
PUT
BioMarin Pharmaceuticals
BMRN
$11.5B
| $92K | ﹤0.01% |
240
+73
| +44% | +$6.64K |
|
1820
Peabody Energy
BTU
$2.78B
| $92K | ﹤0.01% |
+3,766
| New | +$93.1K |
|
1821
Coeur Mining
CDE
$15.6B
| $92K | ﹤0.01% |
10,780
-13,450
| -56% | -$122K |
|
1822
CALL
Corcept Therapeutics
CORT
$10.2B
| $92K | ﹤0.01% |
820
+531
| +184% | +$5.77K |
|
1823
CALL
Canadian Solar
CSIQ
$906M
| $92K | ﹤0.01% |
676
+35
| +5% | +$468 |
|
1824
LivePerson
LPSN
$18.9M
| $92K | ﹤0.01% |
+559
| New | +$76.7K |
|
|
NVMI
1825
Nova
NVMI
$13.9B
| $92K | ﹤0.01% |
4,165
-2,868
| -41% | -$63.8K |
|
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.