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 | |
|---|---|---|---|---|---|---|
|
ETP
301
DELISTED
Energy Transfer Partners L.p.
ETP
| $1.31M | 0.06% |
36,013
-22,045
| -38% | -$820K |
|
302
PUT
Humana
HUM
$47.8B
| $1.31M | 0.06% |
2,739
+1,117
| +69% | +$231K |
|
303
CALL
Merck
MRK
$316B
| $1.31M | 0.06% |
9,141
+6,106
| +201% | +$370K |
|
304
PUT
Microsoft
MSFT
$2.88T
| $1.3M | 0.06% |
4,959
-3,076
| -38% | -$197K |
|
|
SINA
305
DELISTED
Sina Corp
SINA
| $1.3M | 0.06% |
18,059
+5,922
| +49% | +$419K |
|
306
AstraZeneca
AZN
$263B
| $1.29M | 0.06% |
20,685
-12,076
| -37% | -$703K |
|
307
TG Therapeutics
TGTX
$8.13B
| $1.29M | 0.06% |
+110,390
| New | +$792K |
|
308
CALL
Western Digital
WDC
$193B
| $1.28M | 0.06% |
3,552
+1,845
| +108% | +$106K |
|
309
Teradyne
TER
$58.4B
| $1.28M | 0.06% |
41,121
+29,164
| +244% | +$834K |
|
310
CALL
Bristol-Myers Squibb
BMY
$124B
| $1.27M | 0.06% |
7,580
+1,180
| +18% | +$64.7K |
|
311
CALL
Broadcom
AVGO
$1.89T
| $1.27M | 0.06% |
11,510
-1,230
| -10% | -$25.3K |
|
312
PUT
Baidu
BIDU
$36.7B
| $1.26M | 0.05% |
2,061
+275
| +15% | +$48.4K |
|
313
Lincoln National
LNC
$7.97B
| $1.25M | 0.05% |
19,164
+2,790
| +17% | +$191K |
|
314
BHP
BHP
$215B
| $1.25M | 0.05% |
+38,696
| New | +$1.34M |
|
315
CALL
Mastercard
MA
$472B
| $1.25M | 0.05% |
3,078
+312
| +11% | +$34.2K |
|
316
PUT
Morgan Stanley
MS
$343B
| $1.25M | 0.05% |
7,787
+3,708
| +91% | +$165K |
|
317
Viavi Solutions
VIAV
$10.5B
| $1.25M | 0.05% |
116,620
+108,250
| +1,293% | +$1.05M |
|
|
B
318
CALL
Barrick Mining
B
$62.4B
| $1.24M | 0.05% |
3,998
-1,763
| -31% | -$32.5K |
|
319
PUT
Palo Alto Networks
PANW
$276B
| $1.23M | 0.05% |
13,878
+1,566
| +13% | +$35K |
|
320
Jazz Pharmaceuticals
JAZZ
$15.9B
| $1.23M | 0.05% |
+8,470
| New | +$1.1M |
|
321
CALL
Union Pacific
UNP
$174B
| $1.23M | 0.05% |
2,698
+1,485
| +122% | +$158K |
|
322
TSMC
TSM
$2.19T
| $1.22M | 0.05% |
+37,084
| New | +$1.16M |
|
|
PTR
323
DELISTED
PETROCHINA COMPANY LIMITED ADS (REP 100 H SHARES)
PTR
| $1.21M | 0.05% |
16,575
+9,767
| +143% | +$753K |
|
324
BlackBerry
BB
$5.32B
| $1.21M | 0.05% |
155,760
+68,971
| +79% | +$491K |
|
|
AZPN
325
DELISTED
ASPEN TECHNOLOGY INC
AZPN
| $1.21M | 0.05% |
+20,491
| New | +$1.21M |
|
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.