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 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$49.8M |
| 2 |
Apple
AAPL
|
+$24.5M |
| 3 |
Citigroup
C
|
+$23.5M |
| 4 |
Amazon
AMZN
|
+$22.7M |
| 5 |
Alphabet (Google) Class C
GOOG
|
+$18.5M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
LNKD
LinkedIn Corporation
LNKD
|
+$17.4M |
| 2 |
Wells Fargo
WFC
|
+$13.5M |
| 3 |
MDVN
MEDIVATION, INC.
MDVN
|
+$8.62M |
| 4 |
Goldman Sachs
GS
|
+$8.5M |
| 5 |
iShares iBoxx $ High Yield Corporate Bond ETF
HYG
|
+$8.15M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Communication Services | 8.76% |
| 2 | Technology | 7.19% |
| 3 | Healthcare | 6.91% |
| 4 | Consumer Discretionary | 6.53% |
| 5 | Financials | 5.37% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
776
PUT
Duke Energy
DUK
$101B
| $317K | 0.02% |
552
+33
| +6% | +$2.53K |
|
777
ING
ING
$92.6B
| $317K | 0.02% |
22,544
+12,197
| +118% | +$164K |
|
|
VIAB
778
PUT
DELISTED
Viacom Inc. Class B
VIAB
| $317K | 0.02% |
1,026
-935
| -48% | -$34.4K |
|
|
WFM
779
CALL
DELISTED
Whole Foods Market Inc
WFM
| $317K | 0.02% |
4,302
+2,697
| +168% | +$81.1K |
|
|
CBPO
780
DELISTED
China Biologic Products Holdings, Inc.
CBPO
| $317K | 0.02% |
2,956
-32,553
| -92% | -$3.81M |
|
781
Cameco
CCJ
$38.9B
| $315K | 0.02% |
30,172
-15,101
| -33% | -$136K |
|
782
CALL
Petrobras
PBR
$123B
| $314K | 0.02% |
3,258
+617
| +23% | +$6.59K |
|
783
Silicon Laboratories
SLAB
$7.17B
| $312K | 0.02% |
4,805
-5,589
| -54% | -$352K |
|
784
Sociedad Química y Minera de Chile
SQM
$19.9B
| $312K | 0.02% |
+10,909
| New | +$310K |
|
|
NUAN
785
DELISTED
Nuance Communications, Inc.
NUAN
| $312K | 0.02% |
24,193
+3,892
| +19% | +$50.1K |
|
786
PUT
Newmont
NEM
$101B
| $311K | 0.02% |
2,074
+815
| +65% | +$27.8K |
|
787
PUT
SM Energy
SM
$8.05B
| $310K | 0.02% |
265
+164
| +162% | +$5.92K |
|
788
CALL
Terex
TEX
$7.85B
| $308K | 0.02% |
615
+84
| +16% | +$2.33K |
|
789
Hartford Financial Services
HIG
$38.9B
| $307K | 0.02% |
6,460
-52,668
| -89% | -$2.42M |
|
790
Apollo Global Management
APO
$68.5B
| $306K | 0.02% |
15,817
+8,351
| +112% | +$158K |
|
791
CALL
Cisco
CSCO
$444B
| $306K | 0.02% |
2,509
+865
| +53% | +$26.4K |
|
792
ManpowerGroup
MAN
$2.31B
| $306K | 0.02% |
+3,448
| New | +$284K |
|
|
WLL
793
PUT
DELISTED
Whiting Petroleum Corporation
WLL
| $306K | 0.02% |
5
| – | – |
|
794
CALL
Blackstone
BX
$150B
| $303K | 0.02% |
1,973
+770
| +64% | +$20K |
|
795
Teradyne
TER
$58B
| $303K | 0.02% |
11,957
-17,461
| -59% | -$414K |
|
796
Valmont Industries
VMI
$9.31B
| $303K | 0.02% |
+2,152
| New | +$299K |
|
797
CALL
T-Mobile US
TMUS
$190B
| $301K | 0.02% |
432
+10
| +2% | +$523 |
|
798
CALL
CSX Corp
CSX
$98B
| $300K | 0.02% |
2,544
+84
| +3% | +$942 |
|
799
PUT
Puma Biotechnology
PBYI
$403M
| $300K | 0.02% |
280
-126
| -31% | -$5.45K |
|
800
Bank OZK
OZK
$5.44B
| $299K | 0.02% |
5,700
-1,326
| -19% | -$59K |
|
Similar funds
Simplex Trading's Q4 2016 Portfolio in Review
As of Q4 2016, Simplex Trading held 7,301 positions worth $1.67B, up 13% from $1.48B the previous quarter. Its ten largest holdings account for 20% of the portfolio.
Simplex Trading deployed $181M of net new capital in Q4 2016, opening 1,543 new positions and adding to 2,137 existing holdings. Its largest new stake was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
By sector, the portfolio is most concentrated in Communication Services at 8.8% of assets, up from 8.4% a quarter earlier, followed by Technology and Healthcare.
On the sell side, the largest reduction was Goldman Sachs, an estimated $8.5M trimmed.
- Simplex Trading's largest Q4 2016 buy was State Street SPDR S&P 500 ETF Trust: 227,870 shares worth $50.9M.
- Simplex Trading added most to Apple in Q4 2016, an estimated $24.5M increase.
- Simplex Trading's biggest Q4 2016 reduction was Goldman Sachs, cutting an estimated $8.5M.
- Simplex Trading fully exited LinkedIn Corporation in Q4 2016, selling an estimated $17.4M.
- Simplex Trading's ten largest holdings make up 20% of its $1.67B portfolio in Q4 2016.
- Simplex Trading opened 1,543 new positions and closed 1,480 in Q4 2016.
- Simplex Trading's portfolio value rose 13% quarter-over-quarter to $1.67B.
Based on Simplex Trading's 13F filing for Q4 2016, filed 11 Jan 2017.