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 | |
|---|---|---|---|---|---|---|
576
Ligand Pharmaceuticals
LGND
$6.1B
| $613K | 0.03% |
9,293
+9,243
| +18,486% | +$608K |
|
|
KYNB
577
Kyntra Bio
KYNB
$29.2M
| $611K | 0.03% |
992
+24
| +2% | +$14.6K |
|
|
YHOO
578
CALL
DELISTED
Yahoo Inc
YHOO
| $611K | 0.03% |
1,854
-1,336
| -42% | -$59.6K |
|
579
Lamar Advertising Co
LAMR
$16.1B
| $609K | 0.03% |
+8,152
| New | +$612K |
|
580
Teck Resources
TECK
$28B
| $607K | 0.03% |
27,719
+4,857
| +21% | +$109K |
|
|
SPA
581
DELISTED
Sparton
SPA
| $606K | 0.03% |
28,882
+131
| +0.5% | +$2.92K |
|
|
SPN
582
DELISTED
Superior Energy Services, Inc.
SPN
| $606K | 0.03% |
4,254
+3,793
| +823% | +$625K |
|
583
CALL
AB InBev
BUD
$161B
| $602K | 0.03% |
732
-286
| -28% | -$30.7K |
|
584
PUT
Snap
SNAP
$7.52B
| $602K | 0.03% |
+4,074
| New | +$90.3K |
|
585
CALL
Waste Management
WM
$94.9B
| $602K | 0.03% |
1,132
+600
| +113% | +$42.8K |
|
586
PUT
Cleveland-Cliffs
CLF
$5.39B
| $600K | 0.03% |
3,402
+2,097
| +161% | +$19.9K |
|
587
CALL
Energy Transfer Partners
ET
$70.1B
| $600K | 0.03% |
3,773
+1,291
| +52% | +$24.3K |
|
588
PUT
Merck
MRK
$315B
| $599K | 0.03% |
4,162
-460
| -10% | -$27.9K |
|
|
DNB
589
DELISTED
Dun & Bradstreet
DNB
| $599K | 0.03% |
5,551
+5,206
| +1,509% | +$589K |
|
590
Halliburton
HAL
$27.6B
| $598K | 0.03% |
+12,161
| New | +$654K |
|
591
Tower Semiconductor
TSEM
$28.2B
| $598K | 0.03% |
25,972
+4,878
| +23% | +$107K |
|
|
MNDT
592
DELISTED
Mandiant, Inc. Common Stock
MNDT
| $595K | 0.03% |
47,229
+8,819
| +23% | +$105K |
|
593
Xylem
XYL
$27.6B
| $594K | 0.03% |
11,845
+6,911
| +140% | +$337K |
|
594
iShares Russell 2000 Growth ETF
IWO
$14.7B
| $593K | 0.03% |
+3,671
| New | +$583K |
|
595
iShares Semiconductor ETF
SOXX
$46.6B
| $592K | 0.03% |
+12,975
| New | +$566K |
|
596
CALL
Skyworks Solutions
SWKS
$9.5B
| $592K | 0.03% |
1,135
+170
| +18% | +$15.5K |
|
597
PUT
Altria Group
MO
$121B
| $591K | 0.03% |
3,733
-165
| -4% | -$11.9K |
|
|
TGP
598
DELISTED
Teekay LNG Partners L.P.
TGP
| $591K | 0.03% |
33,679
+29,721
| +751% | +$522K |
|
599
Allstate
ALL
$64.8B
| $590K | 0.03% |
+7,248
| New | +$570K |
|
600
CRA International
CRAI
$1.09B
| $589K | 0.03% |
+16,675
| New | +$584K |
|
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.