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 | |
|---|---|---|---|---|---|---|
701
iShares Mortgage Real Estate ETF
REM
$547M
| $465K | 0.02% |
+10,043
| New | +$466K |
|
|
FIT
702
PUT
DELISTED
Fitbit, Inc. Class A common stock
FIT
| $464K | 0.02% |
1,445
+603
| +72% | +$3.34K |
|
703
Huazhu Hotels Group
HTHT
$12.5B
| $463K | 0.02% |
22,968
+20,720
| +922% | +$381K |
|
704
EQT Corp
EQT
$33.8B
| $458K | 0.02% |
14,369
+9,764
| +212% | +$309K |
|
|
TRCO
705
DELISTED
TRIBUNE MEDIA COMPANY CLASS A
TRCO
| $458K | 0.02% |
11,248
+1,231
| +12% | +$48.3K |
|
|
AMRN
706
Amarin Corp
AMRN
$287M
| $456K | 0.02% |
5,658
+1,031
| +22% | +$64.1K |
|
707
Plains GP Holdings
PAGP
$5.19B
| $456K | 0.02% |
+17,461
| New | +$488K |
|
708
Arch Capital
ACGL
$34.5B
| $455K | 0.02% |
14,640
+14,283
| +4,001% | +$453K |
|
|
EMWP
709
DELISTED
Eros Media World PLC
EMWP
| $454K | 0.02% |
1,983
+1,492
| +304% | +$305K |
|
|
CTRA
710
CALL
DELISTED
Coterra Energy
CTRA
| $453K | 0.02% |
2,392
+2,280
| +2,036% | +$53.8K |
|
711
PUT
Occidental Petroleum
OXY
$57.2B
| $453K | 0.02% |
1,171
-572
| -33% | -$35K |
|
|
RDUS
712
DELISTED
Radius Recycling
RDUS
| $453K | 0.02% |
+18,014
| New | +$356K |
|
713
PUT
Nike
NKE
$62.6B
| $446K | 0.02% |
5,435
-135
| -2% | -$7.28K |
|
714
Enerpac Tool Group
EPAC
$1.77B
| $443K | 0.02% |
+18,010
| New | +$462K |
|
|
TGNA
715
DELISTED
TEGNA Inc
TGNA
| $443K | 0.02% |
30,750
+23,262
| +311% | +$358K |
|
716
PUT
BlackBerry
BB
$5.25B
| $441K | 0.02% |
1,530
+732
| +92% | +$7.2K |
|
717
CALL
CME Group
CME
$90.1B
| $441K | 0.02% |
875
+299
| +52% | +$35.8K |
|
|
ALXN
718
PUT
DELISTED
Alexion Pharmaceuticals
ALXN
| $440K | 0.02% |
1,385
+1,114
| +411% | +$130K |
|
719
PUT
APA Corp
APA
$12.8B
| $439K | 0.02% |
1,074
-88
| -8% | -$4.34K |
|
720
CALL
Honeywell
HON
$73.8B
| $439K | 0.02% |
1,677
-699
| -29% | -$82.5K |
|
721
CALL
Verizon
VZ
$185B
| $439K | 0.02% |
4,129
-127
| -3% | -$5.92K |
|
|
CLR
722
PUT
DELISTED
CONTINENTAL RESOURCES INC.
CLR
| $439K | 0.02% |
1,169
+202
| +21% | +$7.99K |
|
723
WisdomTree India Earnings Fund ETF
EPI
$2.03B
| $438K | 0.02% |
+17,894
| New | +$444K |
|
724
WEX
WEX
$5.4B
| $437K | 0.02% |
4,198
-508
| -11% | -$52.3K |
|
725
Boston Scientific
BSX
$63.9B
| $436K | 0.02% |
15,729
-4,655
| -23% | -$124K |
|
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.