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 |
LNKD
LinkedIn Corporation
LNKD
|
+$21.4M |
| 2 |
SPDR Gold Trust
GLD
|
+$17.3M |
| 3 |
QIHU
QIHOO 360 TECHNOLOGY CO LTD ADS RPSTG 3 CL A SHS
QIHU
|
+$15M |
| 4 |
Biogen
BIIB
|
+$14.9M |
| 5 |
Visa
V
|
+$14.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Broadcom
AVGO
|
+$36.7M |
| 2 |
Alphabet (Google) Class C
GOOG
|
+$20.1M |
| 3 |
iShares MSCI Emerging Markets ETF
EEM
|
+$15.8M |
| 4 |
Citigroup
C
|
+$14.7M |
| 5 |
State Street SPDR S&P MIDCAP 400 ETF Trust
MDY
|
+$13.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 6.61% |
| 2 | Healthcare | 6.55% |
| 3 | Technology | 6.45% |
| 4 | Consumer Discretionary | 4.54% |
| 5 | Financials | 4.51% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
726
CALL
Target
TGT
$62.6B
| $332K | 0.02% |
2,153
-285
| -12% | -$21.3K |
|
727
CALL
Targa Resources
TRGP
$61.1B
| $332K | 0.02% |
1,593
+1,109
| +229% | +$43.5K |
|
|
RDS.A
728
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $332K | 0.02% |
2,054
+959
| +88% | +$48.8K |
|
|
OUTR
729
PUT
DELISTED
OUTERWALL INC
OUTR
| $332K | 0.02% |
355
-109
| -23% | -$4.42K |
|
|
DERM
730
DELISTED
Dermira, Inc.
DERM
| $330K | 0.02% |
+11,284
| New | +$311K |
|
731
PUT
Chevron
CVX
$384B
| $327K | 0.02% |
5,693
+2,072
| +57% | +$208K |
|
|
GNC
732
DELISTED
GNC Holdings, Inc.
GNC
| $327K | 0.02% |
+13,491
| New | +$373K |
|
|
ACAS
733
DELISTED
American Capital Ltd
ACAS
| $327K | 0.02% |
20,705
-51,066
| -71% | -$807K |
|
734
PUT
United Rentals
URI
$64.8B
| $326K | 0.02% |
296
-95
| -24% | -$6.2K |
|
735
CALL
Diageo
DEO
$46.9B
| $325K | 0.02% |
561
+10
| +2% | +$1.08K |
|
736
CALL
Weibo
WB
$1.93B
| $325K | 0.02% |
565
+224
| +66% | +$5.45K |
|
737
PUT
LyondellBasell Industries
LYB
$20.1B
| $324K | 0.02% |
475
-336
| -41% | -$27.7K |
|
738
Axalta
AXTA
$7.02B
| $323K | 0.02% |
+12,203
| New | +$346K |
|
739
Insmed
INSM
$23.1B
| $323K | 0.02% |
32,801
+27,465
| +515% | +$320K |
|
740
CALL
Texas Instruments
TXN
$268B
| $323K | 0.02% |
1,258
+130
| +12% | +$7.73K |
|
|
GXP
741
DELISTED
Great Plains Energy Incorporated
GXP
| $321K | 0.02% |
+10,582
| New | +$325K |
|
|
UFS
742
DELISTED
DOMTAR CORPORATION (New)
UFS
| $319K | 0.02% |
9,134
+8,802
| +2,651% | +$339K |
|
|
SPLK
743
CALL
DELISTED
Splunk Inc
SPLK
| $317K | 0.02% |
798
+219
| +38% | +$11.6K |
|
744
Cencora
COR
$58.5B
| $316K | 0.02% |
+3,985
| New | +$320K |
|
745
CALL
AutoZone
AZO
$48.5B
| $315K | 0.02% |
214
+67
| +46% | +$51.6K |
|
|
JOYY
746
JOYY Inc
JOYY
$3.65B
| $315K | 0.02% |
9,327
-4,297
| -32% | -$214K |
|
|
EMC
747
DELISTED
EMC CORPORATION
EMC
| $315K | 0.02% |
+11,618
| New | +$314K |
|
748
Xtrackers Harvest CSI 300 China A-Shares ETF
ASHR
$1.37B
| $314K | 0.02% |
+13,252
| New | +$315K |
|
749
CALL
Oracle
ORCL
$362B
| $314K | 0.02% |
1,800
-1,009
| -36% | -$40.3K |
|
|
CHK
750
DELISTED
Chesapeake Energy Corporation
CHK
| $314K | 0.02% |
+368
| New | +$353K |
|
Similar funds
Simplex Trading's Q2 2016 Portfolio in Review
As of Q2 2016, Simplex Trading held 7,153 positions worth $1.5B, up 19% from $1.25B the previous quarter. Its ten largest holdings account for 19% of the portfolio.
Simplex Trading deployed $178M of net new capital in Q2 2016, opening 1,586 new positions and adding to 2,321 existing holdings. Its largest new stake was Biogen: 56,467 shares worth $13.7M.
By sector, the portfolio is most concentrated in Communication Services at 6.6% of assets, down from 6.9% a quarter earlier, followed by Healthcare and Technology.
On the sell side, the largest reduction was Broadcom, an estimated $36.7M trimmed.
- Simplex Trading's largest Q2 2016 buy was Biogen: 56,467 shares worth $13.7M.
- Simplex Trading added most to LinkedIn Corporation in Q2 2016, an estimated $21.4M increase.
- Simplex Trading's biggest Q2 2016 reduction was Broadcom, cutting an estimated $36.7M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q2 2016, selling an estimated $20.1M.
- Simplex Trading's ten largest holdings make up 19% of its $1.5B portfolio in Q2 2016.
- Simplex Trading opened 1,586 new positions and closed 1,363 in Q2 2016.
- Simplex Trading's portfolio value rose 19% quarter-over-quarter to $1.5B.
Based on Simplex Trading's 13F filing for Q2 2016, filed 18 Jul 2016.