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 | Consumer Discretionary | 0.49% |
| 2 | Technology | 0.48% |
| 3 | Healthcare | 0.35% |
| 4 | Industrials | 0.35% |
| 5 | Communication Services | 0.21% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2426
CALL
Essent Group
ESNT
$6.06B
| $600K | ﹤0.01% |
126
+18
| +17% | +$861 |
|
|
TIVO
2427
PUT
DELISTED
Tivo Inc
TIVO
| $599K | ﹤0.01% |
787
-433
| -35% | -$3.31K |
|
|
BPL
2428
CALL
DELISTED
Buckeye Partners, L.P.
BPL
| $599K | ﹤0.01% |
146
-1
| -0.7% | -$41 |
|
2429
PUT
CNX Resources
CNX
$4.85B
| $598K | ﹤0.01% |
824
+738
| +858% | +$5.53K |
|
2430
Dropbox
DBX
$6.81B
| $597K | ﹤0.01% |
29,601
+13,422
| +83% | +$286K |
|
2431
Cheniere Energy
LNG
$56.5B
| $596K | ﹤0.01% |
+9,456
| New | +$606K |
|
|
SGMO
2432
CALL
DELISTED
SANGAMO THERAPEUTICS INC
SGMO
| $596K | ﹤0.01% |
659
-28
| -4% | -$314 |
|
|
BECN
2433
CALL
DELISTED
Beacon Roofing Supply, Inc.
BECN
| $596K | ﹤0.01% |
178
+148
| +493% | +$5K |
|
|
HALL
2434
DELISTED
Hallmark Financial Services, Inc.
HALL
| $595K | ﹤0.01% |
3,115
+1,210
| +64% | +$200K |
|
2435
PUT
Camtek
CAMT
$6.9B
| $594K | ﹤0.01% |
634
+586
| +1,221% | +$5.36K |
|
2436
CALL
Ericsson
ERIC
$30.7B
| $593K | ﹤0.01% |
744
+198
| +36% | +$1.69K |
|
2437
CALL
Alaunos Therapeutics
TCRT
$4.74M
| $593K | ﹤0.01% |
9
+4
| +80% | +$3.17K |
|
2438
PUT
Invesco Equal Weight 0-30 Year Treasury ETF
GOVI
$1.22B
| $592K | ﹤0.01% |
108
+105
| +3,500% | +$3.68K |
|
2439
RE/MAX Holdings
RMAX
$200M
| $592K | ﹤0.01% |
+18,438
| New | +$523K |
|
|
MIME
2440
CALL
DELISTED
Mimecast Limited
MIME
| $592K | ﹤0.01% |
166
-13
| -7% | -$565 |
|
2441
CALL
Dine Brands
DIN
$432M
| $591K | ﹤0.01% |
78
-57
| -42% | -$4.67K |
|
2442
CALL
Knowles
KN
$3.22B
| $591K | ﹤0.01% |
291
+215
| +283% | +$4.22K |
|
|
PRO
2443
CALL
DELISTED
PROS Holdings
PRO
| $590K | ﹤0.01% |
99
-5
| -5% | -$337 |
|
2444
CALL
UBS Group
UBS
$170B
| $589K | ﹤0.01% |
521
-1,315
| -72% | -$14.8K |
|
2445
CALL
CryoPort
CYRX
$775M
| $587K | ﹤0.01% |
359
+354
| +7,080% | +$7.09K |
|
2446
PUT
Canadian Imperial Bank of Commerce
CM
$107B
| $586K | ﹤0.01% |
142
-68
| -32% | -$2.67K |
|
2447
PUT
Patterson-UTI
PTEN
$3.87B
| $586K | ﹤0.01% |
686
+420
| +158% | +$4.12K |
|
|
TWOU
2448
DELISTED
2U Inc
TWOU
| $586K | ﹤0.01% |
+1,201
| New | +$863K |
|
2449
Arlo Technologies
ARLO
$1.4B
| $585K | ﹤0.01% |
171,657
-95,127
| -36% | -$345K |
|
2450
CALL
Nordson
NDSN
$16.5B
| $585K | ﹤0.01% |
40
+25
| +167% | +$3.48K |
|
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 Consumer Discretionary at 0.49% of assets, up from 0.26% a quarter earlier, followed by Technology and Healthcare.
- 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.