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 |
Amazon
AMZN
|
+$83.1M |
| 2 |
Alphabet (Google) Class A
GOOGL
|
+$37.2M |
| 3 |
Amgen
AMGN
|
+$30.5M |
| 4 |
Micron Technology
MU
|
+$28.8M |
| 5 |
Qualcomm
QCOM
|
+$18.2M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
State Street SPDR S&P 500 ETF Trust
SPY
|
+$29.5M |
| 2 |
Goldman Sachs
GS
|
+$27.8M |
| 3 |
Gilead Sciences
GILD
|
+$27.6M |
| 4 |
Booking.com
BKNG
|
+$25.4M |
| 5 |
AT&T
T
|
+$19.6M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 13.55% |
| 2 | Communication Services | 11.57% |
| 3 | Consumer Discretionary | 9.69% |
| 4 | Healthcare | 7.28% |
| 5 | Financials | 4.17% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
376
Lumen
LUMN
$6.9B
| $962K | 0.04% |
+40,295
| New | +$1.01M |
|
377
PUT
Seagate
STX
$205B
| $959K | 0.04% |
3,498
+335
| +11% | +$14.6K |
|
378
Petrobras
PBR
$122B
| $958K | 0.04% |
119,924
-475,087
| -80% | -$4.24M |
|
379
PUT
Freeport-McMoran
FCX
$93.4B
| $957K | 0.04% |
8,548
+1,208
| +16% | +$14.7K |
|
|
AXDX
380
DELISTED
Accelerate Diagnostics
AXDX
| $956K | 0.04% |
+3,498
| New | +$948K |
|
381
eBay
EBAY
$49.3B
| $956K | 0.04% |
+27,404
| New | +$938K |
|
382
CALL
Home Depot
HD
$330B
| $956K | 0.04% |
2,154
+349
| +19% | +$53.5K |
|
|
ACIA
383
DELISTED
Acacia Communications Inc
ACIA
| $954K | 0.04% |
23,016
+22,416
| +3,736% | +$1.08M |
|
384
Howmet Aerospace
HWM
$112B
| $950K | 0.04% |
+54,721
| New | +$1.11M |
|
385
Viavi Solutions
VIAV
$10.4B
| $949K | 0.04% |
90,203
-26,417
| -23% | -$285K |
|
386
PUT
SM Energy
SM
$7.96B
| $941K | 0.04% |
645
+38
| +6% | +$754 |
|
387
CALL
Humana
HUM
$47.7B
| $939K | 0.04% |
630
-192
| -23% | -$43.5K |
|
388
NRG Energy
NRG
$29.5B
| $938K | 0.04% |
54,478
-56,678
| -51% | -$950K |
|
|
PPLC
389
PUT
DELISTED
PortfolioPlus S&P 500 ETF
PPLC
| $929K | 0.04% |
1,688
-4,476
| -73% | -$140K |
|
|
TCF
390
DELISTED
TCF Financial Corporation
TCF
| $929K | 0.04% |
+58,308
| New | +$938K |
|
|
KYNB
391
Kyntra Bio
KYNB
$29.2M
| $928K | 0.04% |
1,149
+157
| +16% | +$109K |
|
|
GG.WS.A
392
PUT
DELISTED
GOLDCORP INC SERIES A WARRANTS EXP 5/30/2007
GG.WS.A
| $928K | 0.04% |
2,131
-1,633
| -43% | -$711K |
|
393
Alibaba
BABA
$279B
| $924K | 0.04% |
6,561
+6,361
| +3,181% | +$785K |
|
394
Axalta
AXTA
$7.02B
| $922K | 0.04% |
+28,778
| New | +$919K |
|
395
PUT
Teva Pharmaceuticals
TEVA
$35.1B
| $922K | 0.04% |
3,456
-2,363
| -41% | -$73.1K |
|
396
CALL
Morgan Stanley
MS
$343B
| $921K | 0.04% |
6,064
+2,779
| +85% | +$120K |
|
|
397
PUT
Amgen
AMGN
$198B
| $918K | 0.04% |
3,275
-1,046
| -24% | -$170K |
|
398
PUT
Broadcom
AVGO
$1.89T
| $917K | 0.04% |
19,050
+3,080
| +19% | +$71.5K |
|
399
Direxion Daily Junior Gold Miners Index Bear 2X ETF
JDST
$28.9M
| $914K | 0.04% |
3
-1
| -25% | -$354K |
|
400
CALL
Medtronic
MDT
$105B
| $911K | 0.04% |
2,024
+190
| +10% | +$16K |
|
Similar funds
Simplex Trading's Q2 2017 Portfolio in Review
As of Q2 2017, Simplex Trading held 7,527 positions worth $2.3B, down 0.39% from $2.31B the previous quarter. Its ten largest holdings account for 23% of the portfolio.
Simplex Trading withdrew a net $114M in Q2 2017, closing 1,474 positions and reducing 2,320 holdings. Its most notable exit was AT&T, an estimated $19.6M position sold in full.
By sector, the portfolio is most concentrated in Technology at 14% of assets, up from 9.7% a quarter earlier, followed by Communication Services and Consumer Discretionary.
Against the trend, Simplex Trading opened a new position in Amgen worth $32.3M.
- Simplex Trading's largest Q2 2017 buy was Amgen: 187,633 shares worth $32.3M.
- Simplex Trading added most to Amazon in Q2 2017, an estimated $83.1M increase.
- Simplex Trading's biggest Q2 2017 reduction was State Street SPDR S&P 500 ETF Trust, cutting an estimated $29.5M.
- Simplex Trading fully exited AT&T in Q2 2017, selling an estimated $19.6M.
- Simplex Trading's ten largest holdings make up 23% of its $2.3B portfolio in Q2 2017.
- Simplex Trading opened 1,408 new positions and closed 1,474 in Q2 2017.
- Simplex Trading's portfolio value fell 0.39% quarter-over-quarter to $2.3B.
Based on Simplex Trading's 13F filing for Q2 2017, filed 12 Jul 2017.