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 | |
|---|---|---|---|---|---|---|
451
CALL
Morgan Stanley
MS
$343B
| $832K | 0.04% |
3,285
-1,770
| -35% | -$78.5K |
|
452
NOV
NOV
$7.3B
| $830K | 0.04% |
+20,705
| New | +$807K |
|
453
PUT
Target
TGT
$62.6B
| $824K | 0.04% |
2,043
-805
| -28% | -$50.1K |
|
454
CALL
Qualcomm
QCOM
$185B
| $822K | 0.04% |
4,442
+1,399
| +46% | +$81.2K |
|
455
T. Rowe Price
TROW
$24.9B
| $821K | 0.04% |
+12,059
| New | +$855K |
|
|
SLCA
456
DELISTED
U.S. SILICA HOLDINGS, INC.
SLCA
| $811K | 0.04% |
+16,911
| New | +$905K |
|
|
JO
457
DELISTED
iPath Bloomberg Coffee Subindex Total Return ETN due June 24, 2038
JO
| $811K | 0.04% |
41,781
+33,563
| +408% | +$690K |
|
458
Capri Holdings
CPRI
$1.86B
| $803K | 0.03% |
21,096
-24,933
| -54% | -$981K |
|
459
SM Energy
SM
$7.96B
| $803K | 0.03% |
33,457
+23,088
| +223% | +$640K |
|
460
iShares Russell Mid-Cap ETF
IWR
$56.7B
| $801K | 0.03% |
+17,120
| New | +$794K |
|
461
PUT
Nike
NKE
$62.6B
| $801K | 0.03% |
5,570
+2,870
| +106% | +$159K |
|
|
VXZ
462
CALL
DELISTED
iPath S&P 500 VIX Mid-Term Futures ETN due 1/30/2019
VXZ
| $799K | 0.03% |
12,407
-826
| -6% | -$24.6K |
|
|
XYZ
463
Block Inc
XYZ
$46.1B
| $798K | 0.03% |
46,205
+34,139
| +283% | +$534K |
|
464
HP
HPQ
$23B
| $796K | 0.03% |
+44,554
| New | +$721K |
|
465
Johnson & Johnson
JNJ
$615B
| $796K | 0.03% |
6,399
-557
| -8% | -$66.5K |
|
466
Vanguard FTSE Emerging Markets ETF
VWO
$121B
| $795K | 0.03% |
20,017
+6,791
| +51% | +$262K |
|
467
Cigna
CI
$75.4B
| $791K | 0.03% |
+5,400
| New | +$796K |
|
468
Ecolab
ECL
$75.1B
| $790K | 0.03% |
6,306
+2,523
| +67% | +$308K |
|
|
UCTT
469
Ultra Clean Holdings
UCTT
$4.55B
| $782K | 0.03% |
46,368
+45,031
| +3,368% | +$598K |
|
470
Zoetis
ZTS
$31.1B
| $782K | 0.03% |
14,668
-13,173
| -47% | -$712K |
|
471
CALL
ProShares UltraShort Health Care
RXD
$3.38M
| $776K | 0.03% |
2,065
+418
| +25% | +$70K |
|
|
ESRX
472
PUT
DELISTED
Express Scripts Holding Company
ESRX
| $776K | 0.03% |
2,182
+939
| +76% | +$64.6K |
|
473
State Street SPDR S&P Bank ETF
KBE
$1.64B
| $775K | 0.03% |
+18,032
| New | +$794K |
|
|
474
PUT
ProShares UltraShort Health Care
RXD
$3.38M
| $775K | 0.03% |
797
-74
| -8% | -$12.4K |
|
475
Wingstop
WING
$3.76B
| $775K | 0.03% |
+27,438
| New | +$760K |
|
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.