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 | |
|---|---|---|---|---|---|---|
426
CALL
National Beverage
FIZZ
$2.91B
| $892K | 0.04% |
788
-504
| -39% | -$15.2K |
|
427
Weyerhaeuser
WY
$17.2B
| $889K | 0.04% |
26,181
+10,381
| +66% | +$338K |
|
|
ILG
428
DELISTED
ILG, Inc Common Stock
ILG
| $882K | 0.04% |
42,096
+40,596
| +2,706% | +$763K |
|
429
PUT
Colgate-Palmolive
CL
$73.3B
| $873K | 0.04% |
2,765
+1,610
| +139% | +$113K |
|
|
SHPG
430
DELISTED
Shire pic
SHPG
| $873K | 0.04% |
+5,016
| New | +$876K |
|
|
SCHW
431
Charles Schwab
SCHW
$175B
| $872K | 0.04% |
+21,387
| New | +$883K |
|
432
Genesis Energy
GEL
$1.83B
| $871K | 0.04% |
26,873
+23,560
| +711% | +$817K |
|
433
CALL
Biogen
BIIB
$29.2B
| $866K | 0.04% |
830
+20
| +2% | +$5.66K |
|
|
GIMO
434
DELISTED
Gigamon Inc.
GIMO
| $866K | 0.04% |
+24,379
| New | +$870K |
|
435
CALL
UnitedHealth
UNH
$392B
| $864K | 0.04% |
1,353
+220
| +19% | +$36K |
|
|
WMGI
436
DELISTED
Wright Medical Group Inc
WMGI
| $863K | 0.04% |
27,750
+20,034
| +260% | +$543K |
|
437
Nelnet
NNI
$4.76B
| $860K | 0.04% |
19,626
+12,941
| +194% | +$618K |
|
438
Supernus Pharmaceuticals
SUPN
$2.72B
| $859K | 0.04% |
+27,447
| New | +$736K |
|
|
TWTR
439
PUT
DELISTED
Twitter, Inc.
TWTR
| $858K | 0.04% |
5,620
-1,692
| -23% | -$27.5K |
|
440
United States Oil Fund
USO
$2.36B
| $857K | 0.04% |
+10,077
| New | +$893K |
|
441
Ameren
AEE
$31B
| $854K | 0.04% |
15,652
+10,251
| +190% | +$549K |
|
|
ZAYO
442
DELISTED
Zayo Group Holdings, Inc.
ZAYO
| $854K | 0.04% |
25,958
+6,207
| +31% | +$198K |
|
|
ABB
443
DELISTED
ABB Ltd
ABB
| $847K | 0.04% |
+36,216
| New | +$827K |
|
444
Element Solutions
ESI
$9.35B
| $844K | 0.04% |
+64,845
| New | +$798K |
|
445
PUT
General Motors
GM
$74.1B
| $839K | 0.04% |
6,161
+2,226
| +57% | +$81.4K |
|
446
CALL
McDonald's
MCD
$187B
| $839K | 0.04% |
2,440
+1,741
| +249% | +$218K |
|
447
CALL
ProShares Ultra S&P500
SSO
$8.02B
| $839K | 0.04% |
10,360
-2,032
| -16% | -$20.9K |
|
448
PUT
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
$46B
| $838K | 0.04% |
5,762
+1,322
| +30% | +$270K |
|
449
Huntington Ingalls Industries
HII
$10.9B
| $835K | 0.04% |
4,173
-2,861
| -41% | -$582K |
|
|
SYNH
450
DELISTED
Syneos Health, Inc. Class A Common Stock
SYNH
| $834K | 0.04% |
+18,193
| New | +$905K |
|
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.