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 | |
|---|---|---|---|---|---|---|
2526
Tencent Music
TME
$15.4B
| $550K | ﹤0.01% |
+43,075
| New | +$606K |
|
2527
State Street SPDR S&P Bank ETF
KBE
$1.65B
| $549K | ﹤0.01% |
12,735
-9,237
| -42% | -$394K |
|
2528
Axsome Therapeutics
AXSM
$12.3B
| $548K | ﹤0.01% |
+27,084
| New | +$696K |
|
|
INFO
2529
CALL
DELISTED
IHS Markit Ltd. Common Shares
INFO
| $548K | ﹤0.01% |
82
-137
| -63% | -$8.95K |
|
|
AVP
2530
CALL
DELISTED
Avon Products, Inc.
AVP
| $548K | ﹤0.01% |
1,246
-24
| -2% | -$101 |
|
|
TTM.RT
2531
PUT
DELISTED
TATA MOTORS LIMITED RT PUR ADR
TTM.RT
| $548K | ﹤0.01% |
654
+208
| +47% | +$174K |
|
|
TCO
2532
PUT
DELISTED
Taubman Centers Inc.
TCO
| $547K | ﹤0.01% |
134
-83
| -38% | -$3.38K |
|
2533
CALL
Silicon Motion
SIMO
$8.09B
| $544K | ﹤0.01% |
154
+129
| +516% | +$4.67K |
|
|
NBL
2534
PUT
DELISTED
Noble Energy, Inc.
NBL
| $543K | ﹤0.01% |
242
+97
| +67% | +$2.16K |
|
2535
PUT
Invesco
IVZ
$13.3B
| $542K | ﹤0.01% |
320
+133
| +71% | +$2.35K |
|
2536
CALL
Leidos
LDOS
$14.4B
| $541K | ﹤0.01% |
63
+20
| +47% | +$1.68K |
|
2537
PUT
Toronto Dominion Bank
TD
$198B
| $541K | ﹤0.01% |
93
+39
| +72% | +$2.22K |
|
|
TERP
2538
CALL
DELISTED
TerraForm Power, Inc
TERP
| $541K | ﹤0.01% |
297
+219
| +281% | +$3.54K |
|
2539
PUT
Jabil
JBL
$31.5B
| $540K | ﹤0.01% |
151
+123
| +439% | +$3.71K |
|
2540
CALL
Sonos
SONO
$1.85B
| $540K | ﹤0.01% |
403
-219
| -35% | -$2.74K |
|
|
RCM
2541
DELISTED
R1 RCM Inc. Common Stock
RCM
| $539K | ﹤0.01% |
60,403
+42,602
| +239% | +$502K |
|
2542
iShares MSCI Germany ETF
EWG
$1.55B
| $538K | ﹤0.01% |
+20,003
| New | +$538K |
|
2543
Semtech
SMTC
$11B
| $538K | ﹤0.01% |
11,074
+6,740
| +156% | +$320K |
|
2544
PUT
Duke Energy
DUK
$101B
| $536K | ﹤0.01% |
56
-11
| -16% | -$1K |
|
2545
CALL
Polaris
PII
$4.19B
| $536K | ﹤0.01% |
61
-168
| -73% | -$14.6K |
|
2546
CALL
Upland Software
UPLD
$12M
| $536K | ﹤0.01% |
15
-11
| -42% | -$4.57K |
|
|
ENLC
2547
CALL
DELISTED
ENLINK MIDSTREAM, LLC
ENLC
| $536K | ﹤0.01% |
631
+112
| +22% | +$986 |
|
2548
American Airlines Group
AAL
$9.77B
| $535K | ﹤0.01% |
19,851
-26,638
| -57% | -$779K |
|
2549
CALL
Carlyle Group
CG
$16.8B
| $534K | ﹤0.01% |
209
-7
| -3% | -$167 |
|
2550
CALL
Nutrien
NTR
$32.2B
| $533K | ﹤0.01% |
107
-76
| -42% | -$3.88K |
|
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.