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 | |
|---|---|---|---|---|---|---|
1501
PUT
Autoliv
ALV
$8.6B
| $136K | 0.01% |
987
+875
| +781% | +$66.3K |
|
1502
PUT
Chord Energy
CHRD
$7.79B
| $136K | 0.01% |
282
+117
| +71% | +$1.28K |
|
1503
CALL
Cemex
CX
$17.4B
| $136K | 0.01% |
1,023
+260
| +34% | +$2.29K |
|
1504
PUT
Suncor Energy
SU
$77.7B
| $136K | 0.01% |
353
-561
| -61% | -$17.2K |
|
1505
PUT
Westlake Corp
WLK
$9.46B
| $136K | 0.01% |
402
+389
| +2,992% | +$24.7K |
|
|
XYZ
1506
CALL
Block Inc
XYZ
$45.9B
| $136K | 0.01% |
529
+279
| +112% | +$5.77K |
|
|
AMJ
1507
DELISTED
JP Morgan Alerian MLP Index ETN 5/24/24
AMJ
| $136K | 0.01% |
+4,605
| New | +$141K |
|
1508
PUT
Blackstone
BX
$104B
| $135K | 0.01% |
1,845
-2,258
| -55% | -$70.8K |
|
1509
CALL
Keurig Dr Pepper
KDP
$40.4B
| $135K | 0.01% |
338
+261
| +339% | +$24.4K |
|
1510
PUT
Mercado Libre
MELI
$91.3B
| $135K | 0.01% |
509
+411
| +419% | +$106K |
|
1511
MacroGenics
MGNX
$235M
| $135K | 0.01% |
+7,734
| New | +$148K |
|
1512
Norwegian Cruise Line
NCLH
$8.89B
| $135K | 0.01% |
+2,494
| New | +$129K |
|
|
1513
CALL
AT&T
T
$165B
| $135K | 0.01% |
4,773
-1,378
| -22% | -$40.6K |
|
|
SGEN
1514
PUT
DELISTED
Seagen Inc. Common Stock
SGEN
| $135K | 0.01% |
190
+140
| +280% | +$8.9K |
|
|
STI
1515
CALL
DELISTED
SunTrust Banks, Inc.
STI
| $135K | 0.01% |
550
+295
| +116% | +$16.4K |
|
|
CYBR
1516
PUT
DELISTED
CyberArk
CYBR
| $134K | 0.01% |
716
+539
| +305% | +$27.2K |
|
1517
CALL
Novartis
NVS
$295B
| $134K | 0.01% |
353
+196
| +125% | +$13.9K |
|
1518
PUT
RH
RH
$3.3B
| $134K | 0.01% |
771
+299
| +63% | +$15.8K |
|
|
ZEUS
1519
DELISTED
Olympic Steel
ZEUS
| $134K | 0.01% |
6,927
+6,698
| +2,925% | +$123K |
|
|
LEAF
1520
DELISTED
Leaf Group Ltd.
LEAF
| $134K | 0.01% |
17,204
-12,943
| -43% | -$105K |
|
1521
PUT
Advanced Energy
AEIS
$12.2B
| $133K | 0.01% |
233
+25
| +12% | +$1.83K |
|
1522
PUT
ASML
ASML
$675B
| $133K | 0.01% |
279
-152
| -35% | -$20.1K |
|
1523
Ionis Pharmaceuticals
IONS
$9.35B
| $133K | 0.01% |
2,631
-35,944
| -93% | -$1.67M |
|
1524
Rollins
ROL
$18.6B
| $133K | 0.01% |
7,403
+4,845
| +189% | +$86.9K |
|
1525
CALL
Take-Two Interactive
TTWO
$43B
| $133K | 0.01% |
250
+188
| +303% | +$12.9K |
|
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.