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 | |
|---|---|---|---|---|---|---|
651
CALL
Corning
GLW
$133B
| $504K | 0.02% |
1,245
-106
| -8% | -$3.05K |
|
652
ProShares Ultra Bloomberg Crude Oil
UCO
$431M
| $504K | 0.02% |
5,436
+4,056
| +294% | +$425K |
|
|
XLNX
653
CALL
DELISTED
Xilinx Inc
XLNX
| $501K | 0.02% |
1,509
+1,297
| +612% | +$81.9K |
|
654
CALL
Philip Morris
PM
$303B
| $500K | 0.02% |
857
-198
| -19% | -$22.9K |
|
655
W.R. Berkley
WRB
$26.9B
| $500K | 0.02% |
24,398
-12,231
| -33% | -$248K |
|
|
BWLD
656
DELISTED
Buffalo Wild Wings, Inc.
BWLD
| $500K | 0.02% |
3,951
+708
| +22% | +$106K |
|
657
PUT
TripAdvisor
TRIP
$1.61B
| $499K | 0.02% |
1,225
+424
| +53% | +$17.5K |
|
658
PTC Therapeutics
PTCT
$6.5B
| $497K | 0.02% |
27,167
+17,975
| +196% | +$242K |
|
659
PUT
Viatris
VTRS
$19.8B
| $497K | 0.02% |
2,360
-3,168
| -57% | -$122K |
|
660
Bath & Body Works
BBWI
$4.04B
| $496K | 0.02% |
11,396
-109,640
| -91% | -$4.49M |
|
|
RAD
661
PUT
DELISTED
Rite Aid Corporation
RAD
| $496K | 0.02% |
179
-94
| -34% | -$7.1K |
|
662
CALL
AstraZeneca
AZN
$263B
| $495K | 0.02% |
1,118
+34
| +3% | +$2.22K |
|
663
CALL
Blackrock
BLK
$164B
| $495K | 0.02% |
323
+18
| +6% | +$7.18K |
|
664
Seagate
STX
$205B
| $492K | 0.02% |
+12,697
| New | +$554K |
|
|
WRI
665
DELISTED
Weingarten Realty Investors
WRI
| $490K | 0.02% |
16,310
+6,543
| +67% | +$209K |
|
|
SGG
666
DELISTED
iPath Bloomberg Sugar Subindex Total Return ETN due June 24, 2038
SGG
| $490K | 0.02% |
16,902
+16,601
| +5,515% | +$544K |
|
|
MMP
667
DELISTED
Magellan Midstream Partners, L.P.
MMP
| $489K | 0.02% |
6,862
+851
| +14% | +$62.5K |
|
|
ENDP
668
DELISTED
Endo International plc
ENDP
| $489K | 0.02% |
43,867
+17,599
| +67% | +$207K |
|
669
Qorvo
QRVO
$7.89B
| $487K | 0.02% |
+7,706
| New | +$551K |
|
670
Jefferies Financial Group
JEF
$12.9B
| $486K | 0.02% |
+20,795
| New | +$474K |
|
|
VIAB
671
PUT
DELISTED
Viacom Inc. Class B
VIAB
| $486K | 0.02% |
1,309
+205
| +19% | +$7.8K |
|
672
CF Industries
CF
$19.6B
| $484K | 0.02% |
17,343
+5,612
| +48% | +$155K |
|
673
Immersion
IMMR
$217M
| $484K | 0.02% |
53,352
-31,548
| -37% | -$272K |
|
674
PUT
Morgan Stanley
MS
$343B
| $484K | 0.02% |
5,672
-2,115
| -27% | -$91.2K |
|
675
Southern Company
SO
$108B
| $483K | 0.02% |
+10,089
| New | +$506K |
|
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.