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 | |
|---|---|---|---|---|---|---|
|
ESPR
401
DELISTED
Esperion Therapeutics
ESPR
| $958K | 0.04% |
27,155
+12,802
| +89% | +$293K |
|
402
Clorox
CLX
$11.6B
| $956K | 0.04% |
+7,091
| New | +$919K |
|
403
Antero Resources
AR
$10.9B
| $955K | 0.04% |
41,878
+20,642
| +97% | +$505K |
|
404
Molina Healthcare
MOH
$11.6B
| $948K | 0.04% |
20,809
+20,159
| +3,101% | +$1.06M |
|
405
AutoZone
AZO
$48.5B
| $945K | 0.04% |
1,308
+795
| +155% | +$589K |
|
406
CALL
Salesforce
CRM
$133B
| $944K | 0.04% |
3,682
+1,217
| +49% | +$97.2K |
|
407
Ford
F
$57.5B
| $939K | 0.04% |
80,728
-19,424
| -19% | -$241K |
|
|
STZ.B
408
CALL
DELISTED
CONSTELLATION BRANDS, INC. CLASS B
STZ.B
| $939K | 0.04% |
839
+506
| +152% | +$78.3K |
|
|
IBKC
409
DELISTED
IBERIABANK Corp
IBKC
| $939K | 0.04% |
+11,879
| New | +$974K |
|
|
CEO
410
DELISTED
CNOOC Limited
CEO
| $935K | 0.04% |
7,812
+5,495
| +237% | +$671K |
|
411
CALL
3M
MMM
$89.1B
| $930K | 0.04% |
1,794
-358
| -17% | -$54.9K |
|
412
PUT
Boeing
BA
$164B
| $929K | 0.04% |
8,239
+4,712
| +134% | +$803K |
|
413
Deckers Outdoor
DECK
$14.2B
| $925K | 0.04% |
92,940
+57,522
| +162% | +$531K |
|
|
PNRA
414
CALL
DELISTED
Panera Bread Co
PNRA
| $924K | 0.04% |
485
+398
| +457% | +$90.3K |
|
415
Icon
ICLR
$12.9B
| $923K | 0.04% |
11,587
+10,804
| +1,380% | +$885K |
|
416
Thomson Reuters
TRI
$38.1B
| $923K | 0.04% |
+18,402
| New | +$940K |
|
417
State Street SPDR S&P Biotech ETF
XBI
$10.2B
| $922K | 0.04% |
13,297
+13,047
| +5,219% | +$876K |
|
418
LKQ Corp
LKQ
$6.42B
| $919K | 0.04% |
31,431
+9,488
| +43% | +$295K |
|
419
PUT
Chevron
CVX
$384B
| $912K | 0.04% |
2,503
-1,072
| -30% | -$120K |
|
420
Tenet Healthcare
THC
$16.8B
| $909K | 0.04% |
51,348
+19,645
| +62% | +$364K |
|
|
MLNX
421
DELISTED
Mellanox Technologies, Ltd.
MLNX
| $901K | 0.04% |
17,685
+12,247
| +225% | +$581K |
|
422
Eversource Energy
ES
$28B
| $899K | 0.04% |
+15,303
| New | +$870K |
|
423
CALL
Amgen
AMGN
$198B
| $897K | 0.04% |
3,435
+1,648
| +92% | +$274K |
|
424
Synaptics
SYNA
$4.71B
| $896K | 0.04% |
18,099
-21,411
| -54% | -$1.15M |
|
425
PUT
Viatris
VTRS
$19.8B
| $896K | 0.04% |
5,528
+3,383
| +158% | +$136K |
|
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.