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 | |
|---|---|---|---|---|---|---|
901
PUT
Charter Communications
CHTR
$15.4B
| $237K | 0.02% |
527
-131
| -20% | -$28.1K |
|
902
CALL
American Express
AXP
$233B
| $236K | 0.02% |
1,706
-153
| -8% | -$9.69K |
|
903
CALL
Novavax
NVAX
$1.29B
| $236K | 0.02% |
59
+43
| +269% | +$4.93K |
|
904
Lexicon Pharmaceuticals
LXRX
$1.01B
| $235K | 0.02% |
16,380
+16,257
| +13,217% | +$220K |
|
905
Direxion Daily FTSE China Bear 3X ETF
YANG
$87.3M
| $234K | 0.02% |
+57
| New | +$281K |
|
|
CA
906
CALL
DELISTED
CA, Inc.
CA
| $234K | 0.02% |
781
+471
| +152% | +$14.7K |
|
|
907
PUT
Broadcom
AVGO
$1.86T
| $233K | 0.02% |
25,850
+18,580
| +256% | +$283K |
|
908
Teva Pharmaceuticals
TEVA
$35.5B
| $233K | 0.02% |
4,658
-31,626
| -87% | -$1.68M |
|
909
Edison International
EIX
$30.8B
| $231K | 0.02% |
+2,977
| New | +$214K |
|
910
PUT
Alaska Air
ALK
$4.91B
| $229K | 0.02% |
562
+263
| +88% | +$18.2K |
|
|
LL
911
CALL
DELISTED
LL Flooring Holdings, Inc.
LL
| $229K | 0.02% |
797
-157
| -16% | -$2.18K |
|
|
MDC
912
DELISTED
M.D.C. Holdings, Inc.
MDC
| $229K | 0.02% |
13,113
-1,885
| -13% | -$32.6K |
|
|
RLYP
913
PUT
DELISTED
RELYPSA INC COM
RLYP
| $228K | 0.02% |
524
+91
| +21% | +$1.6K |
|
914
CALL
F5
FFIV
$22.3B
| $226K | 0.02% |
243
-172
| -41% | -$18.5K |
|
915
Rocket Pharmaceuticals
RCKT
$351M
| $226K | 0.02% |
+7,616
| New | +$268K |
|
916
CALL
US Bancorp Series B Preferred Stock
USB.PRH
$742M
| $226K | 0.02% |
5,112
-1,166
| -19% | -$27.1K |
|
917
CALL
Teck Resources
TECK
$29.3B
| $225K | 0.02% |
641
-907
| -59% | -$9.37K |
|
918
Westlake Corp
WLK
$9.78B
| $225K | 0.02% |
5,262
+4,966
| +1,678% | +$227K |
|
|
RAD
919
PUT
DELISTED
Rite Aid Corporation
RAD
| $225K | 0.02% |
131
+97
| +285% | +$15.3K |
|
920
PUT
APA Corp
APA
$13B
| $224K | 0.02% |
826
-154
| -16% | -$8.37K |
|
921
BOK Financial
BOKF
$8.48B
| $224K | 0.02% |
+3,580
| New | +$213K |
|
922
CALL
NextEra Energy
NEE
$188B
| $224K | 0.02% |
1,064
-112
| -10% | -$3.36K |
|
923
Opko Health
OPK
$899M
| $224K | 0.02% |
24,036
-27,460
| -53% | -$279K |
|
|
CYNO
924
DELISTED
Cynosure, Inc. Class A
CYNO
| $223K | 0.01% |
+4,587
| New | +$218K |
|
925
HF Sinclair
DINO
$16.2B
| $222K | 0.01% |
9,341
-2,440
| -21% | -$72.7K |
|
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.