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 |
Alibaba
BABA
|
+$50.3M |
| 2 |
Boeing
BA
|
+$24.3M |
| 3 |
SPDR Gold Trust
GLD
|
+$18.3M |
| 4 |
Biogen
BIIB
|
+$15.9M |
| 5 |
FedEx
FDX
|
+$15.1M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$60.3M |
| 2 |
iShares Russell 2000 ETF
IWM
|
+$36.4M |
| 3 |
Netflix
NFLX
|
+$19M |
| 4 |
State Street Industrial Select Sector SPDR ETF
XLI
|
+$17.3M |
| 5 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$14.2M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Miscellaneous | 97.54% |
| 2 | Consumer Discretionary | 0.49% |
| 3 | Technology | 0.48% |
| 4 | Healthcare | 0.37% |
| 5 | Industrials | 0.35% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
601
PUT
Ralph Lauren
RL
$20.9B
| $6.23M | 0.02% |
653
+285
| +77% | +$28.2K |
|
|
ABMD
602
PUT
DELISTED
Abiomed Inc
ABMD
| $6.23M | 0.02% |
350
+59
| +20% | +$12.8K |
|
603
CALL
Skyworks Solutions
SWKS
$11.1B
| $6.22M | 0.02% |
785
+87
| +12% | +$6.93K |
|
604
CALL
Petrobras
PBR
$130B
| $6.2M | 0.02% |
4,288
-242
| -5% | -$3.55K |
|
605
CALL
TJX Companies
TJX
$145B
| $6.17M | 0.02% |
1,108
-249
| -18% | -$13.6K |
|
606
PUT
Estee Lauder
EL
$37.6B
| $6.17M | 0.02% |
310
-23
| -7% | -$4.4K |
|
607
PUT
Rio Tinto
RIO
$168B
| $6.15M | 0.02% |
1,180
+683
| +137% | +$37.1K |
|
608
CALL
Albemarle
ALB
$14.9B
| $6.14M | 0.02% |
883
+737
| +505% | +$50.2K |
|
609
PUT
Wabtec
WAB
$47.8B
| $6.12M | 0.02% |
851
-110
| -11% | -$7.82K |
|
610
Ulta Beauty
ULTA
$24.1B
| $6.1M | 0.02% |
+24,348
| New | +$7.47M |
|
611
CALL
Hartford Financial Services
HIG
$37.5B
| $6.08M | 0.02% |
1,004
+516
| +106% | +$30.2K |
|
612
Broadcom
AVGO
$1.7T
| $6.06M | 0.02% |
+219,690
| New | +$6.25M |
|
613
PUT
Prudential Financial
PRU
$42.1B
| $6.06M | 0.02% |
674
+8
| +1% | +$725 |
|
614
PUT
SBA Communications
SBAC
$20.1B
| $6.05M | 0.02% |
251
-158
| -39% | -$39.1K |
|
|
ALXN
615
CALL
DELISTED
Alexion Pharmaceuticals
ALXN
| $6.05M | 0.02% |
618
+102
| +20% | +$11.5K |
|
616
CALL
Advance Auto Parts
AAP
$2.67B
| $6.04M | 0.02% |
365
+219
| +150% | +$32.9K |
|
617
CALL
Humana
HUM
$48.2B
| $6.01M | 0.02% |
235
+8
| +4% | +$2.24K |
|
618
CALL
Chubb
CB
$132B
| $6M | 0.02% |
372
-207
| -36% | -$32K |
|
619
CALL
United States Natural Gas Fund
UNG
$572M
| $6M | 0.02% |
753
-621
| -45% | -$49.9K |
|
620
PUT
Air Products & Chemicals
APD
$67.1B
| $5.99M | 0.02% |
270
+229
| +559% | +$51.5K |
|
621
PUT
Pinduoduo
PDD
$117B
| $5.99M | 0.02% |
1,859
-600
| -24% | -$16K |
|
622
PUT
Willis Towers Watson
WTW
$31.1B
| $5.96M | 0.02% |
309
+212
| +219% | +$41.4K |
|
623
PUT
KB Home
KBH
$3.2B
| $5.96M | 0.02% |
1,753
-161
| -8% | -$4.51K |
|
624
PUT
PNC Financial Services
PNC
$98B
| $5.96M | 0.02% |
425
+85
| +25% | +$11.5K |
|
625
CALL
Sherwin-Williams
SHW
$81B
| $5.94M | 0.02% |
324
-93
| -22% | -$15.8K |
|
Similar funds
Simplex Trading's Q3 2019 Portfolio in Review
As of Q3 2019, Simplex Trading held 8,410 positions worth $35.2B, down 4.1% from $36.6B the previous quarter. Its ten largest holdings account for 33% of the portfolio.
Simplex Trading's Q3 2019 filing shows 1,312 new, 3,129 increased, 2,596 reduced and 1,163 closed positions. Its largest new stake was SPDR Gold Trust: 131,281 shares worth $18.2M. The largest sale was Alphabet (Google) Class C, an estimated $60.3M.
By sector, the portfolio is most concentrated in Miscellaneous at 98% of assets, up from 97% a quarter earlier, followed by Consumer Discretionary and Technology.
- Simplex Trading's largest Q3 2019 buy was SPDR Gold Trust: 131,281 shares worth $18.2M.
- Simplex Trading added most to Alibaba in Q3 2019, an estimated $50.3M increase.
- Simplex Trading's biggest Q3 2019 reduction was Alphabet (Google) Class C, cutting an estimated $60.3M.
- Simplex Trading fully exited iShares Russell 2000 ETF in Q3 2019, selling an estimated $36.4M.
- Simplex Trading's ten largest holdings make up 33% of its $35.2B portfolio in Q3 2019.
- Simplex Trading opened 1,312 new positions and closed 1,163 in Q3 2019.
- Simplex Trading's portfolio value fell 4.1% quarter-over-quarter to $35.2B.
Based on Simplex Trading's 13F filing for Q3 2019, filed 15 Oct 2019.