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 |
SPDR Gold Trust
GLD
|
+$31.6M |
| 2 |
iShares Silver Trust
SLV
|
+$28.1M |
| 3 |
State Street SPDR Dow Jones Industrial Average ETF Trust
DIA
|
+$25.1M |
| 4 |
JPMorgan Chase
JPM
|
+$24.5M |
| 5 |
Direxion Daily Junior Gold Miners Index Bull 2X ETF
JNUG
|
+$24M |
Top Sells
| Rank | Stock | Value |
|---|---|---|
| 1 |
Alphabet (Google) Class C
GOOG
|
+$51.6M |
| 2 |
Amazon
AMZN
|
+$47.4M |
| 3 |
iShares 20+ Year Treasury Bond ETF
TLT
|
+$44.7M |
| 4 |
Netflix
NFLX
|
+$38.3M |
| 5 |
NVIDIA
NVDA
|
+$31.1M |
Sector Composition
| Rank | Sector | Weight |
|---|---|---|
| 1 | Technology | 0.49% |
| 2 | Healthcare | 0.33% |
| 3 | Consumer Discretionary | 0.32% |
| 4 | Financials | 0.16% |
| 5 | Communication Services | 0.16% |
| Name | Market Value | Portfolio Weight | Shares or Principal |
Change in Stake | Capital Flow | |
|---|---|---|---|---|---|---|
2876
CALL
Trupanion
TRUP
$1.05B
| $385K | ﹤0.01% |
148
-23
| -13% | -$719 |
|
2877
Waste Management
WM
$95.9B
| $385K | ﹤0.01% |
4,161
-41
| -1% | -$4.7K |
|
2878
PUT
Bloomin' Brands
BLMN
$680M
| $384K | ﹤0.01% |
538
+418
| +348% | +$7.28K |
|
|
RCM
2879
DELISTED
R1 RCM Inc. Common Stock
RCM
| $384K | ﹤0.01% |
42,328
-33,065
| -44% | -$398K |
|
|
MGLN
2880
PUT
DELISTED
Magellan Health Services, Inc.
MGLN
| $384K | ﹤0.01% |
80
+50
| +167% | +$3.22K |
|
2881
CALL
Transocean
RIG
$5.92B
| $383K | ﹤0.01% |
3,307
+1,123
| +51% | +$4.38K |
|
|
SRCL
2882
PUT
DELISTED
Stericycle Inc
SRCL
| $383K | ﹤0.01% |
79
-146
| -65% | -$8.6K |
|
|
FLIR
2883
DELISTED
FLIR Systems, Inc. (DE) Common Stock
FLIR
| $383K | ﹤0.01% |
+12,020
| New | +$565K |
|
|
BLDP
2884
PUT
Ballard Power Systems
BLDP
$874M
| $382K | ﹤0.01% |
503
+361
| +254% | +$3.51K |
|
2885
National Vision
EYE
$1.6B
| $382K | ﹤0.01% |
+19,717
| New | +$614K |
|
2886
CALL
Frontdoor
FTDR
$5.02B
| $382K | ﹤0.01% |
110
+20
| +22% | +$851 |
|
2887
Minerva Neurosciences
NERV
$188M
| $382K | ﹤0.01% |
7,946
+5,491
| +224% | +$331K |
|
2888
Pampa Energía
PAM
$4.64B
| $382K | ﹤0.01% |
+33,812
| New | +$435K |
|
|
TWNK
2889
PUT
DELISTED
Hostess Brands, Inc. Class A Common Stock
TWNK
| $382K | ﹤0.01% |
359
-36
| -9% | -$457 |
|
2890
PUT
Aaon
AAON
$8.41B
| $381K | ﹤0.01% |
119
| – | – |
|
2891
CALL
Fabrinet
FN
$17.1B
| $381K | ﹤0.01% |
70
+46
| +192% | +$2.78K |
|
2892
PUT
Kulicke & Soffa
KLIC
$5.3B
| $381K | ﹤0.01% |
183
+168
| +1,120% | +$4.12K |
|
2893
CALL
Merit Medical Systems
MMSI
$4.43B
| $381K | ﹤0.01% |
122
+76
| +165% | +$2.71K |
|
2894
PUT
SSR Mining
SSRM
$5.57B
| $381K | ﹤0.01% |
335
-61
| -15% | -$1K |
|
|
SHLX
2895
PUT
DELISTED
Shell Midstream Partners, L.P.
SHLX
| $381K | ﹤0.01% |
382
+326
| +582% | +$5.56K |
|
2896
Cencora
COR
$60.3B
| $380K | ﹤0.01% |
4,294
-3,261
| -43% | -$287K |
|
2897
PUT
Prospect Capital
PSEC
$1.06B
| $380K | ﹤0.01% |
895
+391
| +78% | +$2.31K |
|
2898
Zimmer Biomet
ZBH
$17.7B
| $380K | ﹤0.01% |
+3,875
| New | +$508K |
|
2899
McKesson
MCK
$98.5B
| $379K | ﹤0.01% |
+2,806
| New | +$411K |
|
|
ZUO
2900
CALL
DELISTED
Zuora, Inc.
ZUO
| $379K | ﹤0.01% |
472
-460
| -49% | -$6.05K |
|
Similar funds
Simplex Trading's Q1 2020 Portfolio in Review
As of Q1 2020, Simplex Trading held 8,783 positions worth $56.7B, up 24% from $45.7B the previous quarter. Its ten largest holdings account for 50% of the portfolio.
Simplex Trading's Q1 2020 filing shows 1,512 new, 3,249 increased, 2,705 reduced and 1,159 closed positions. Its largest new stake was SPDR Gold Trust: 212,230 shares worth $31.4M. The largest sale was Alphabet (Google) Class C, an estimated $51.6M.
By sector, the portfolio is most concentrated in Technology at 0.49% of assets, down from 0.75% a quarter earlier, followed by Healthcare and Consumer Discretionary.
- Simplex Trading's largest Q1 2020 buy was SPDR Gold Trust: 212,230 shares worth $31.4M.
- Simplex Trading added most to JPMorgan Chase in Q1 2020, an estimated $24.5M increase.
- Simplex Trading's biggest Q1 2020 reduction was Amazon, cutting an estimated $47.4M.
- Simplex Trading fully exited Alphabet (Google) Class C in Q1 2020, selling an estimated $51.6M.
- Simplex Trading's ten largest holdings make up 50% of its $56.7B portfolio in Q1 2020.
- Simplex Trading opened 1,512 new positions and closed 1,159 in Q1 2020.
- Simplex Trading's portfolio value rose 24% quarter-over-quarter to $56.7B.
Based on Simplex Trading's 13F filing for Q1 2020, filed 29 Apr 2020.