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 | |
|---|---|---|---|---|---|---|
276
Vulcan Materials
VMC
$36.3B
| $1.32M | 0.06% |
10,453
-10,810
| -51% | -$1.36M |
|
|
MOMO
277
Hello Group
MOMO
$879M
| $1.32M | 0.06% |
35,701
+32,126
| +899% | +$1.23M |
|
|
VALE.P
278
PUT
DELISTED
Vale S A
VALE.P
| $1.3M | 0.06% |
2,659
-2,602
| -49% | -$21K |
|
279
PUT
Walt Disney
DIS
$168B
| $1.3M | 0.06% |
8,070
+3,460
| +75% | +$379K |
|
280
Puma Biotechnology
PBYI
$419M
| $1.29M | 0.06% |
14,757
+9,166
| +164% | +$513K |
|
281
CALL
3M
MMM
$89.3B
| $1.28M | 0.06% |
1,361
-433
| -24% | -$72.4K |
|
|
VAR
282
DELISTED
Varian Medical Systems, Inc.
VAR
| $1.28M | 0.06% |
12,429
+5,504
| +79% | +$530K |
|
|
283
CALL
Micron Technology
MU
$1.1T
| $1.28M | 0.06% |
9,435
+2,694
| +40% | +$78.8K |
|
284
PUT
Visa
V
$677B
| $1.28M | 0.06% |
4,748
+1,644
| +53% | +$153K |
|
285
PUT
Bausch Health
BHC
$1.71B
| $1.28M | 0.06% |
6,819
-920
| -12% | -$11K |
|
286
CALL
PayPal
PYPL
$49.1B
| $1.27M | 0.06% |
3,159
+1,964
| +164% | +$96.5K |
|
287
iShares S&P 500 Growth ETF
IVW
$74.6B
| $1.27M | 0.06% |
+37,084
| New | +$1.26M |
|
288
PUT
Bristol-Myers Squibb
BMY
$124B
| $1.26M | 0.05% |
5,699
+525
| +10% | +$28.6K |
|
289
CALL
Wynn Resorts
WYNN
$9.86B
| $1.26M | 0.05% |
1,971
-419
| -18% | -$52.7K |
|
|
CBI
290
DELISTED
Chicago Bridge & Iron Nv
CBI
| $1.26M | 0.05% |
+63,902
| New | +$1.48M |
|
|
VXZ
291
CALL
DELISTED
iPath S&P 500 VIX Mid-Term Futures ETN due 1/30/2019
VXZ
| $1.26M | 0.05% |
11,894
-513
| -4% | -$12.6K |
|
292
PUT
Macy's
M
$6.44B
| $1.25M | 0.05% |
3,491
-2,078
| -37% | -$53.2K |
|
293
PUT
SPDR Gold Trust
GLD
$134B
| $1.25M | 0.05% |
3,741
-1,842
| -33% | -$220K |
|
294
PUT
CVS Health
CVS
$139B
| $1.25M | 0.05% |
2,692
-3,847
| -59% | -$304K |
|
295
Dycom Industries
DY
$13B
| $1.24M | 0.05% |
+13,846
| New | +$1.34M |
|
296
Akamai
AKAM
$17.9B
| $1.24M | 0.05% |
+24,862
| New | +$1.31M |
|
|
BSFT
297
DELISTED
BroadSoft, Inc.
BSFT
| $1.24M | 0.05% |
28,753
+16,184
| +129% | +$636K |
|
298
PUT
GE Aerospace
GE
$357B
| $1.24M | 0.05% |
1,445
+721
| +100% | +$98.8K |
|
299
Snap
SNAP
$7.62B
| $1.23M | 0.05% |
69,464
+68,464
| +6,846% | +$1.38M |
|
|
LSI
300
DELISTED
Life Storage, Inc.
LSI
| $1.22M | 0.05% |
24,743
-775
| -3% | -$40.2K |
|
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.