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 | |
|---|---|---|---|---|---|---|
651
PUT
Procter & Gamble
PG
$347B
| $527K | 0.02% |
9,271
+526
| +6% | +$46.6K |
|
|
DBVT
652
DBV Technologies
DBVT
$807M
| $526K | 0.02% |
+1,495
| New | +$525K |
|
653
Masco
MAS
$15.7B
| $521K | 0.02% |
15,352
+9,769
| +175% | +$326K |
|
|
OSG
654
Octave Specialty Group
OSG
$263M
| $519K | 0.02% |
27,543
-9,027
| -25% | -$190K |
|
655
CALL
Delta Air Lines
DAL
$54.9B
| $519K | 0.02% |
2,543
-1,197
| -32% | -$58.4K |
|
656
Trinity Industries
TRN
$2.87B
| $519K | 0.02% |
27,176
-19,294
| -42% | -$380K |
|
657
CALL
Walmart Inc
WMT
$870B
| $518K | 0.02% |
13,170
+3,750
| +40% | +$86.3K |
|
658
CALL
Shopify
SHOP
$154B
| $517K | 0.02% |
4,520
+3,030
| +203% | +$17.4K |
|
659
PUT
Seagate
STX
$205B
| $513K | 0.02% |
3,163
+1,662
| +111% | +$73.8K |
|
660
Post Holdings
POST
$4.12B
| $510K | 0.02% |
8,908
-466
| -5% | -$25.7K |
|
661
CALL
Autodesk
ADSK
$43B
| $506K | 0.02% |
664
-413
| -38% | -$34.6K |
|
662
Boston Scientific
BSX
$63.9B
| $506K | 0.02% |
20,384
-139,419
| -87% | -$3.39M |
|
|
SN
663
DELISTED
Sanchez Energy Corporation
SN
| $505K | 0.02% |
52,978
+47,910
| +945% | +$536K |
|
|
BSFT
664
DELISTED
BroadSoft, Inc.
BSFT
| $505K | 0.02% |
12,569
+12,548
| +59,752% | +$534K |
|
|
SWC
665
DELISTED
Stillwater Mining Co
SWC
| $505K | 0.02% |
29,255
+20,574
| +237% | +$352K |
|
|
HES
666
PUT
DELISTED
Hess
HES
| $504K | 0.02% |
1,651
-955
| -37% | -$50.6K |
|
667
PUT
T-Mobile US
TMUS
$207B
| $500K | 0.02% |
1,801
+656
| +57% | +$40.3K |
|
|
KANG
668
DELISTED
iKang Healthcare Group, Inc.
KANG
| $500K | 0.02% |
34,301
-141,317
| -80% | -$2.32M |
|
669
Comstock Resources
CRK
$4.12B
| $499K | 0.02% |
54,084
+37,686
| +230% | +$381K |
|
|
CS
670
DELISTED
Credit Suisse Group
CS
| $498K | 0.02% |
33,568
+32,322
| +2,594% | +$493K |
|
|
CALA
671
DELISTED
Calithera Biosciences, Inc
CALA
| $498K | 0.02% |
2,158
+1,960
| +990% | +$339K |
|
672
CALL
Newmont
NEM
$102B
| $495K | 0.02% |
2,649
-3,068
| -54% | -$107K |
|
|
MON
673
CALL
DELISTED
Monsanto Co
MON
| $495K | 0.02% |
1,921
+125
| +7% | +$13.8K |
|
|
BWLD
674
DELISTED
Buffalo Wild Wings, Inc.
BWLD
| $495K | 0.02% |
+3,243
| New | +$495K |
|
675
CALL
Nektar Therapeutics
NKTR
$2.34B
| $493K | 0.02% |
43
+38
| +760% | +$8.54K |
|
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.