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 |
Goldman Sachs
GS
|
+$40.4M |
| 2 |
NVIDIA
NVDA
|
+$23.1M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$21.5M |
| 4 |
Wells Fargo
WFC
|
+$20.8M |
| 5 |
Micron Technology
MU
|
+$20M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Citigroup
C
|
+$21.4M |
| 2 |
Apple
AAPL
|
+$15.7M |
| 3 |
Invesco QQQ Trust
QQQ
|
+$14.4M |
| 4 |
Eli Lilly
LLY
|
+$10.5M |
| 5 |
iShares Biotechnology ETF
IBB
|
+$8.06M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 9.73% |
| 2 | Communication Services | 9.25% |
| 3 | Consumer Discretionary | 8.76% |
| 4 | Healthcare | 8.53% |
| 5 | Financials | 7.38% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
751
National Grid
NGG
$83.5B
| $435K | 0.02% |
+7,116
| New | +$411K |
|
752
CALL
Phillips 66
PSX
$84.8B
| $435K | 0.02% |
1,423
+777
| +120% | +$62.6K |
|
753
PUT
GE Aerospace
GE
$354B
| $434K | 0.02% |
724
-769
| -52% | -$111K |
|
754
CALL
Hasbro
HAS
$12.6B
| $434K | 0.02% |
421
+71
| +20% | +$6.58K |
|
755
PUT
Simon Property Group
SPG
$73.4B
| $434K | 0.02% |
872
+156
| +22% | +$27.9K |
|
756
Insperity
NSP
$1.86B
| $433K | 0.02% |
9,778
+9,662
| +8,329% | +$384K |
|
757
PUT
Illumina
ILMN
$28.9B
| $432K | 0.02% |
626
-126
| -17% | -$19.9K |
|
|
SHLD
758
PUT
DELISTED
Sears Holding Corporation
SHLD
| $432K | 0.02% |
2,517
+1,693
| +205% | +$14.1K |
|
759
Assembly Biosciences
ASMB
$516M
| $431K | 0.02% |
1,409
+1,002
| +246% | +$246K |
|
760
Direxion Daily Energy Bull 2X ETF
ERX
$245M
| $430K | 0.02% |
1,357
+1,115
| +461% | +$391K |
|
761
CALL
General Motors
GM
$74.3B
| $430K | 0.02% |
3,789
+513
| +16% | +$18.8K |
|
|
VIAB
762
CALL
DELISTED
Viacom Inc. Class B
VIAB
| $430K | 0.02% |
2,455
+797
| +48% | +$33.6K |
|
763
PUT
The Mosaic Company
MOS
$7.24B
| $428K | 0.02% |
2,486
+1,120
| +82% | +$34.6K |
|
764
ING
ING
$95.2B
| $427K | 0.02% |
28,338
+5,794
| +26% | +$84.9K |
|
|
AHGP
765
DELISTED
Alliance Holdings GP
AHGP
| $427K | 0.02% |
15,595
-7,054
| -31% | -$202K |
|
|
TYNS
766
CALL
DELISTED
Direxion Daily 7-10 Year Treasury Bear 1X Shares
TYNS
| $426K | 0.02% |
2,550
-522
| -17% | -$15K |
|
|
RDS.A
767
PUT
DELISTED
Royal Dutch Shell PLC ADS Class A
RDS.A
| $425K | 0.02% |
2,761
+612
| +28% | +$32.8K |
|
|
SPNC
768
DELISTED
Spectranetics Corp
SPNC
| $425K | 0.02% |
14,617
+12,408
| +562% | +$331K |
|
769
CALL
Corning
GLW
$133B
| $423K | 0.02% |
1,351
+274
| +25% | +$7.29K |
|
770
AngloGold Ashanti
AU
$41B
| $422K | 0.02% |
39,191
+25,032
| +177% | +$292K |
|
771
KKR & Co
KKR
$85.8B
| $422K | 0.02% |
23,198
-15,501
| -40% | -$275K |
|
|
MOMO
772
CALL
Hello Group
MOMO
$876M
| $422K | 0.02% |
737
-153
| -17% | -$4.08K |
|
773
CALL
Madison Square Garden
MSGS
$9.56B
| $422K | 0.02% |
+252
| New | +$32.8K |
|
|
SHPG
774
PUT
DELISTED
Shire pic
SHPG
| $422K | 0.02% |
422
+328
| +349% | +$57.3K |
|
775
Navient
NAVI
$809M
| $421K | 0.02% |
+28,585
| New | +$438K |
|
Similar funds
Simplex Trading's Q1 2017 Portfolio in Review
As of Q1 2017, Simplex Trading held 7,485 positions worth $2.31B, up 38% from $1.67B the previous quarter. Its ten largest holdings account for 18% of the portfolio.
Simplex Trading deployed $551M of net new capital in Q1 2017, opening 1,662 new positions and adding to 2,374 existing holdings. Its largest new stake was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
By sector, the portfolio is most concentrated in Technology at 9.7% of assets, up from 7.2% a quarter earlier, followed by Communication Services and Consumer Discretionary.
On the sell side, the largest reduction was Citigroup, an estimated $21.4M trimmed.
- Simplex Trading's largest Q1 2017 buy was iShares 20+ Year Treasury Bond ETF: 179,511 shares worth $21.7M.
- Simplex Trading added most to Goldman Sachs in Q1 2017, an estimated $40.4M increase.
- Simplex Trading's biggest Q1 2017 reduction was Citigroup, cutting an estimated $21.4M.
- Simplex Trading fully exited Invesco QQQ Trust in Q1 2017, selling an estimated $14.4M.
- Simplex Trading's ten largest holdings make up 18% of its $2.31B portfolio in Q1 2017.
- Simplex Trading opened 1,662 new positions and closed 1,369 in Q1 2017.
- Simplex Trading's portfolio value rose 38% quarter-over-quarter to $2.31B.
Based on Simplex Trading's 13F filing for Q1 2017, filed 21 Apr 2017.