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 | |
|---|---|---|---|---|---|---|
|
PX
1351
PUT
DELISTED
Praxair Inc
PX
| $164K | 0.01% |
386
+195
| +102% | +$25K |
|
1352
CALL
Ally Financial
ALLY
$13.1B
| $163K | 0.01% |
1,894
+1,349
| +248% | +$26.5K |
|
1353
CALL
LGI Homes
LGIH
$1.4B
| $163K | 0.01% |
386
+178
| +86% | +$5.97K |
|
1354
Casella Waste Systems
CWST
$5.69B
| $162K | 0.01% |
9,931
+8,505
| +596% | +$126K |
|
1355
Quest Diagnostics
DGX
$25.1B
| $162K | 0.01% |
+1,465
| New | +$155K |
|
1356
PUT
Golar LNG
GLNG
$4.95B
| $162K | 0.01% |
713
+294
| +70% | +$7.37K |
|
1357
CALL
Nucor
NUE
$56.4B
| $162K | 0.01% |
879
-694
| -44% | -$40.7K |
|
1358
CALL
Wheaton Precious Metals
WPM
$50.6B
| $162K | 0.01% |
1,228
+733
| +148% | +$15K |
|
|
SEAC
1359
DELISTED
Seachange International Inc
SEAC
| $162K | 0.01% |
3,059
+3,055
| +76,375% | +$155K |
|
|
VER
1360
DELISTED
VEREIT, Inc.
VER
| $162K | 0.01% |
3,999
-190
| -5% | -$7.85K |
|
|
PNRA
1361
CALL
DELISTED
Panera Bread Co
PNRA
| $162K | 0.01% |
1,030
+545
| +112% | +$170K |
|
1362
First Majestic Silver
AG
$8.05B
| $161K | 0.01% |
+19,488
| New | +$164K |
|
1363
Alliance Resource Partners
ARLP
$3.18B
| $161K | 0.01% |
+8,556
| New | +$185K |
|
1364
CALL
Elevance Health
ELV
$81.9B
| $161K | 0.01% |
162
-282
| -64% | -$50.7K |
|
1365
Groupon
GRPN
$980M
| $161K | 0.01% |
+2,109
| New | +$146K |
|
1366
PUT
Hain Celestial
HAIN
$47.8M
| $161K | 0.01% |
2,197
+1,603
| +270% | +$57.9K |
|
1367
CALL
State Street SPDR Portfolio Europe ETF
SPEU
$712M
| $161K | 0.01% |
870
-552
| -39% | -$18.6K |
|
1368
CALL
C.H. Robinson
CHRW
$22B
| $160K | 0.01% |
487
-155
| -24% | -$11K |
|
1369
CALL
Xtrackers MSCI Emerging Markets Hedged Equity ETF
DBEM
$105M
| $160K | 0.01% |
2,225
+906
| +69% | +$19.3K |
|
1370
PUT
Synaptics
SYNA
$4.41B
| $160K | 0.01% |
237
-141
| -37% | -$7.69K |
|
1371
Tronox
TROX
$995M
| $160K | 0.01% |
10,621
-7,360
| -41% | -$118K |
|
1372
Universal Corp
UVV
$1.34B
| $160K | 0.01% |
+2,481
| New | +$172K |
|
1373
Globus Medical
GMED
$10.4B
| $159K | 0.01% |
4,798
-9,034
| -65% | -$284K |
|
1374
PUT
PTC Therapeutics
PTCT
$6.37B
| $159K | 0.01% |
1,190
+344
| +41% | +$4.63K |
|
1375
PUT
Whirlpool
WHR
$2.42B
| $159K | 0.01% |
530
+209
| +65% | +$38.2K |
|
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.